JP2880932B2 - Dry coal preparation method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry coal sorting method and apparatus for sorting coal, particularly low-grade coal raw materials containing a relatively large amount of ash without using water.

[0002]

2. Description of the Related Art Conventionally, the sorting of coal raw materials, that is, the sorting of coal, has been carried out for cut coals of high carbonization such as bituminous coal and anthracite coal. As a method of producing high value-added low ash lump coal or pulverized coal for heating and industrial use from these cut coals,
There are known wet coal separation methods such as heavy liquid, jig, table coal separation, flotation and the like. On the other hand, the calorific value is 3000 to 400
Low kcoal / kg, which is not suitable for the above-mentioned applications even if coal is selected, lignite, sub-bituminous coal, and other low-rank coals are used as fuel for boilers and power generation in cut coal without being sorted. I have. The reason why coal raw materials with a low degree of coalification are not sorted is that the equipment costs of wet coal separation equipment are high, large amounts of water, coal separation sludge, wastewater treatment equipment, etc. are required, and running costs such as power costs are high, and product production is high. This is because the cost of coal preparation is extremely high. In particular, in many developing countries that have to rely on coal as an alternative energy to forest resources and oil, their coal raw materials have low calorific values and contain high sulfur, which is a source of air pollution. There is a strong demand for an apparatus for sorting coal raw materials having a low degree of coalification.
However, since most of these countries have scarce water resources, wet coal preparation equipment that requires a large amount of water has not been widely used.

In order to solve these problems, an electrostatic sorting apparatus has been disclosed (Japanese Patent Publication No. 61-55427). In this electrostatic sorting device, a high-voltage electrode having a sorting stage as a counter electrode is arranged above a sorting stage with a gutter-like channel rotating around a vertical axis, and is sorted into the gutter-like channel from a supply position. The mixture is supplied, and a collection hopper for each particle is arranged at the sorting and collecting position so as to face the inside and outside of the gutter-shaped channel. By a reciprocating motion between a sorting stage based on Coulomb force and a high-voltage electrode, the sample is taken out of the trough-shaped channel and sorted and sorted. Also, in this electrostatic sorting device,
Improving processing capacity and sorting efficiency because electrostatic sorting acts on the entire mixture to be sorted supplied in a layer due to the stirring effect of the mixture caused by the movement of the conductive particles without using water. Is available.

[0004]

Coal, which is a fossil energy, is a kind of sedimentary rock with palaeophyte as the root material. In the sedimentation process, coal is buried deep underground through inorganic components supplied from the surrounding area. It is produced by coalification (solid phase reaction), and therefore has a layered structure. Inorganic components as impurities contained in coal are, for example, quartz,
There are silicates such as feldspar, clay minerals such as kaolin and illite, sulfides such as pyrite, and carbonate minerals such as calcite and siderite, and the occurrence of these impurities is various. When a low-grade coal raw material containing a relatively large amount of the impurities is selected by the conventional electrostatic sorting apparatus, it is necessary to adjust the particle size to a predetermined particle size in advance according to the mixed state or the content of the impurities. is there. This is because the pulverized particles of the coal raw material differ from each other in particle size, shape, and mass, and are a mixture of particles of the coal raw material having different electric characteristics. As a result, in an apparatus based on one electric action, such as the above-mentioned conventional electrostatic sorting apparatus, the range of the particle size of the target coal raw material is limited to a narrow range. However, there is a problem that the separation efficiency is reduced, and this is a technical problem in practical use.

[0005] An object of the present invention is to provide a dry coal separation method and apparatus capable of sorting coal materials having a wide range of particle sizes, removing impurities with high efficiency, and particularly removing sulfides mixed in coal materials with high efficiency. Is to do. Another object of the present invention is to provide a dry coal separation apparatus that can be reduced in size, is inexpensive, and has high productivity.

[0006]

The invention according to claim 1 is
It is an improvement of a dry coal separation method including a step of drying a coal raw material containing a mixture of carbonaceous matter and impurities, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in impurities of the pulverized coal raw material. . The characteristic configuration is as follows: a first classification step of classifying a coal raw material having a particle size of 15 to 0.5 mm from the coal raw material from which the magnetic material has been removed; and a conductive material of the coal raw material classified by the first classification step. Eddy current generating electromagnet 39 on either or both of the carbonaceous material and impurities
Together to generate eddy currents, the magnetic field generating electromagnet
The transport of the coal raw material 13 to the transport route of the coal raw material 13 by 38
Predetermined in the same plane as the feeding surface and in the direction perpendicular to the transport direction
And a conductor separating step of separating the classified coal material into carbonaceous matter and impurities by the electromagnetic force generated by the interaction of the eddy current and the magnetic field. In the dry coal preparation method configured in this way,
The pulverized coal raw material can be separated into carbonaceous matter and impurities by a conductor separation step without using water.

According to a second aspect of the present invention, there is provided a method of classifying a coal raw material having a particle size of 5 to 0.063 mm from a coal raw material from which a magnetic material has been removed, a method of inclining at a predetermined angle and a predetermined ultrasonic wave. The coal raw material classified in the second classification step is placed on a vibration plate that vibrates in a direction perpendicular to the plate surface at a frequency and a predetermined amplitude, and the classified coal raw material is subjected to carbon content and impurities. And a specific gravity-separating step of separating from each other by a difference in motion based on the difference in specific gravity. In the dry coal separation method configured as described above, the pulverized coal raw material can be separated into carbonaceous matter and impurities by a specific gravity separation step without using water. The invention according to claim 3 is that the coal material from which the magnetic material has been removed is 2 mm or less or 2 mm or less.
A third classification step of classifying the coal raw material having a particle size of 0.05 mm, and one or both of the carbonaceous content and the impurities among the coal raw materials classified in the third classification step are removed by grinding the coal raw material.
Rubbing, heating by a heater, or transfer of electrons by a charging promotion unit.
In a state of being charged by receiving a predetermined voltage is applied one
Transported between pairs of electrodes, similar Coulomb force generated between the one or both the said pair of electrodes of the coal components and impurities the charging, band different polarity to the polarity of the electrodes
Either the charged carbonaceous matter or the impurities are attracted to the electrode.
And a dielectric separation step of separating the classified coal raw material into carbonaceous matter and impurities by gathering together. In the dry coal separation method configured as described above, the pulverized coal raw material can be separated into carbonaceous matter and impurities by a dielectric separation step without using water.

The invention according to claim 4 is a method of classifying a coal raw material having a particle size of 15 to 0.5 mm from the coal raw material from which the magnetic material has been removed, and the classification by the first classification step. 3. The conductor separating step according to claim 1, wherein the coal raw material is separated into a carbonaceous substance and impurities, and 5 to 0 smaller than the coal raw material transported to the conductor separating step from the coal raw material from which the magnetic material has been removed. 3. A second classification step of classifying a coal raw material having a particle size of 0.063 mm, a separation step of separating the coal raw material classified in the second classification step into carbonaceous matter and impurities, and a specific gravity separation step according to claim 2. 4. A dry separation method comprising: separating a coal raw material having a particle size of 2 mm or less or a particle size of 2 to 0.05 mm smaller than a coal raw material conveyed to another separation step into a carbonaceous component and impurities from each other in this order. It is a coal preparation method. In the dry coal preparation method configured in this way,
The pulverized coal raw material can be separated into carbonaceous matter and impurities by using a conductor separation step, a specific gravity separation step, and a dielectric separation step without using water. At this time, 15 to
A coal raw material having a particle size of 0.5 mm is separated in a specific gravity separation step by 5 to 5 mm.
Since the coal raw material having a particle diameter of 0.063 mm and the coal raw material having a particle diameter of 2 mm or less can be separated into a carbonaceous component and an impurity in the dielectric separation step, a coal raw material having a relatively wide particle size range can be separated.

According to a fifth aspect of the present invention, a first classifying step of classifying a coal raw material having a particle size of 5 to 0.063 mm from the coal raw material from which the magnetic material has been removed, and the classification is performed by the first classifying step. 3. The method according to claim 2, wherein the coal raw material is separated into a carbonaceous component and impurities, and the coal material from which the magnetic material has been removed is smaller than the coal raw material conveyed to the specific gravity separation process. 2. A conductor separation step according to claim 1, wherein a second classification step of classifying a coal raw material having a particle diameter of 5 mm, a coal raw material classified in the second classification step are separated from each other into carbonaceous matter and impurities, and the conductor 4. A dry coal separation method comprising: separating a coal raw material having a particle size of 2 mm or less or a particle size of 2 to 0.05 mm smaller than the coal raw material conveyed to the separation step into carbonaceous matter and impurities from each other in this order. Is the way. The invention according to claim 6 is a method of classifying a coal raw material having a particle diameter of 15 mm or less or 15 to 0.05 mm from a coal raw material from which a magnetic material has been removed, and the classification is performed by the first classification step. 2. The conductor separating step according to claim 1, wherein the coal raw material is separated into carbonaceous matter and impurities partially mixed with carbonaceous matter, and the impurities partially mixed with carbonaceous matter are separated into carbonaceous matter and partially carbonaceous matter. Wherein the impurities separated by the specific gravity according to claim 2 are separated into carbon impurities and impurities separated by the specific gravity separation step. And a dielectric separation step according to item 3 in this order. The invention according to claim 7 is a method of classifying a coal raw material having a particle size of 5 mm or less or 5 to 0.05 mm from a coal raw material from which a magnetic material has been removed, and the classification is performed by the first classification step. The specific gravity separation step according to claim 2, wherein the coal raw material is separated into carbonaceous matter and impurities in which the carbonaceous matter is partially mixed.
2. The conductor separating step according to claim 1, wherein the impurities in which carbonaceous materials are partially mixed are separated into carbonaceous materials and impurities in which carbonaceous materials are partially mixed. And a dielectric separation step according to claim 3 for separating impurities having a carbonaceous content mixed therein into carbonaceous components and impurities in this order.

The invention according to claim 8 comprises drying devices 14a to 14c for drying a coal raw material 13 in which a carbonaceous material 13a and an impurity 13b are mixed, as shown in FIGS. This is an improvement of a dry coal separation apparatus including a pulverizing device 16 and a magnetic material removing device 17 that removes a magnetic material in impurities 13b of the pulverized coal raw material 13. The characteristic configuration includes a first sieve 11 for classifying a coal raw material 13 having a particle size of 15 to 0.5 mm from the coal raw material 13 from which the magnetic material has been removed, and a coal raw material 13 classified by the first sieve 11. Eddy current generating electromagnet 39 for generating an eddy current in one or both of conductive carbonaceous matter 13a and impurities 13b, and transport of coal raw material 13
The route is within the same plane as the transport surface of the coal raw material 13 and the transport method
For generating a magnetic field that generates a predetermined magnetic field in the direction perpendicular to the direction
An electromagnetic induction selector 19 having an electromagnet 38 and separating the classified coal raw material 13 into a carbonaceous component 13a and an impurity 13b by an electromagnetic force generated by the interaction of the eddy current and the magnetic field. It is in. In the dry coal separation apparatus configured as described above, the pulverized coal raw material 13 can be separated into the carbonaceous matter 13a and the impurities 13b using the electromagnetic induction selector 19 without using water.

According to the ninth aspect of the present invention, as shown in FIG. 1 and FIG.
A second sieve 12 for classifying a coal raw material 13 having a particle size of 0.063 mm; and a vibrating plate 27 which is inclined at a predetermined angle and vibrates in a direction perpendicular to the plate surface at a predetermined ultrasonic frequency and a predetermined amplitude. Coal raw material 1 classified by second sieve 12
3 and the classified coal raw material 13 is converted into a carbonaceous material 13a.
And an impurity 13b, and an ultrasonic selector 18 that separates them from each other by a difference in motion based on the difference in specific gravity. In the dry coal separation apparatus configured as described above, the pulverized coal raw material 13 can be separated into the carbonaceous matter 13a and the impurities 13b using the ultrasonic selector 18 without using water. As shown in FIG. 1, the invention according to claim 10 is 2 mm from the coal raw material 13 from which the magnetic material has been removed.
A third sieve (not shown) for classifying the coal raw material 13 having a particle size of 2 to 0.05 mm or less, and a carbonaceous material 13a and impurities 13 of the coal raw material 13 classified by the third sieve.
b, or both of them ,
Rubbing, heating by heater 47 or by charging promoting unit 53
In a state of being charged by electron transfer, is conveyed between the pair of electrodes 51 and 52 to which a predetermined voltage is applied, the one of the charged coal components 13a and impurities 13b or both the pair of electrodes 51 and 52 Coulomb force generated between
And is charged to a polarity different from the polarity of the electrodes 51 and 52.
One of the carbonaceous material 13a and the impurity 13b
This is a dry type coal separation apparatus provided with an electrostatic selector 20 that separates the classified coal raw material 13 into a carbonaceous component 13a and an impurity 13b by attracting them to 51 or 52 . In the dry type coal separation apparatus configured as described above, the pulverized coal raw material 13 can be separated into the carbonaceous matter 13a and the impurities 13b by using the electrostatic selector 20 without using water.

The invention according to claims 11 to 22 is shown as a representative in FIG. The invention according to claim 11 provides a first sieve 11 for classifying a coal raw material 13 having a particle size of 15 to 0.5 mm from the coal raw material 13 from which the magnetic material has been removed, and a coal classified by the first sieve 11. 9. The electromagnetic induction selector 19 according to claim 8, wherein the raw material 13 is separated into carbonaceous matter 13a and impurities 13b, and the coal raw material 13 from which the magnetic material has been removed.
Raw material 1 conveyed to the electromagnetic induction selector 19 from the
Coal raw material 13 having a particle size of 5 to 0.063 mm smaller than 3
10. The ultrasonic selector 18 according to claim 9, wherein a second sieve 12 for classifying coal and a coal raw material 13 classified by the second sieve 12 are separated from each other into a carbonaceous matter 13a and an impurity 13b.
And an ultrasonic selector 18 classified by the second sieve 12
2 mm or less or 2 smaller than the coal feed 13 conveyed to
It is a dry coal separation apparatus provided with the electrostatic selector 20 according to claim 10, which separates the coal raw material 13 having a particle size of about 0.05 mm into carbonaceous matter 13a and impurities 13b. In the dry coal separation apparatus configured as described above, the pulverized coal raw material 1
3 can be separated into the carbonaceous matter 13a and the impurities 13b by using the electromagnetic induction selector 19, the ultrasonic selector 18 and the electrostatic selector 20 without using water. At this time, the electromagnetic induction selector 19 uses the coal raw material 13 having a particle size of 15 to 0.5 mm, the ultrasonic selector 18 uses the coal raw material 13 having a particle size of 5 to 0.063 mm, and the electrostatic selector 20 uses the particle size of 2 mm or less . Is separated into a carbonaceous component 13a and an impurity 13b, respectively, so that the coal raw material 13 having a relatively wide particle size range can be separated.

The invention according to claim 12 is a method of classifying coal raw material 13 having a particle size of 5 to 0.063 mm from coal raw material 13 from which the magnetic material has been removed, and classification by the first sieve 11. 10. The ultrasonic selector 18 according to claim 9, which separates the separated coal raw material 13 into a carbonaceous component 13a and an impurity 13b, and coal transferred to the ultrasonic selector 18 from the coal raw material 13 from which the magnetic material has been removed. A second sieve (12) for classifying a coal raw material (13) having a particle size of 5 to 0.5 mm smaller than the raw material (13), and the coal raw material (13) classified by the second sieve (12) are separated from each other into carbonaceous matter (13a) and impurities (13b). 8, the electromagnetic induction selector 19 according to
12 by classification are transported coal feed 13 is smaller than 2mm to electromagnetic induction selector 19 following sieve or 2-0.
A dry coal separation apparatus provided with the electrostatic selector 20 according to claim 10, which separates the coal raw material 13 having a particle size of 05 mm into a carbonaceous component 13a and an impurity 13b. The invention according to claim 13 is characterized in that one of the coal raw materials 13 from which the magnetic material has been removed is one.
Coal raw material 1 having a particle size of 5 mm or less or 15 to 0.05 mm
9. The electromagnetic induction selector according to claim 8, wherein the first sieve 11 for classifying the carbon material 3 and the coal raw material 13 classified by the first sieve 11 are separated from each other into a carbonaceous material 13a and an impurity 13b in which the carbonaceous material 13a is partially mixed. The ultrasonic selector 18 according to claim 9, wherein the impurities 13b in which the carbonaceous material 13a is partially mixed are separated into the carbonaceous material 13a and the impurity 13b in which the carbonaceous material 13a is partially mixed. A dry type coal separation apparatus comprising: an electrostatic selector according to claim 10 which separates the impurities 13b in which the carbonaceous matter 13a is mixed in a part thereof separated by the selector 18 into the carbonaceous matter 13a and the impurities 13b. The invention according to claim 14 is a method of classifying the coal raw material 13 having a particle size of 5 mm or less or 5 to 0.05 mm from the coal raw material 13 from which the magnetic material has been removed, and a classification by the first sieve 11. 10. The ultrasonic selector 18 according to claim 9, wherein the coal raw material 13 is separated into a carbonaceous material 13a and an impurity 13b in which a part of the carbonaceous material 13a is mixed. Carbonaceous matter 13a and partially 13a
9. The electromagnetic induction selector 19 according to claim 8, wherein the electromagnetic induction selector 19 and the impurity 13b are mixed with each other.
9. A dry coal separation apparatus comprising: the electrostatic selector 20 according to claim 10, which separates the impurities 13b in which the carbonaceous matter 13a is mixed in a part of the impurities 13b into the carbonaceous matter 13a and the impurities 13b.

The invention according to claim 15 is characterized in that the first sieve 11 for classifying the coal raw material 13 having a particle size of 15 to 0.5 mm from the coal raw material 13 from which the magnetic material has been removed, and the first sieve 1
9. The electromagnetic induction selector 19 according to claim 8, which separates the coal raw material 13 classified by 1 into a carbonaceous component 13a and impurities 13b, and is conveyed to the electromagnetic induction selector 19 from the coal raw material 13 from which the magnetic material is removed. A second sieve 12 for classifying a coal raw material 13 having a particle size of 5 to 0.063 mm smaller than the coal raw material 13, and the coal raw material 13 classified by the second sieve 12 are separated into a carbonaceous component 13 a and an impurity 13 b. A dry coal preparation apparatus comprising the ultrasonic selector 18 according to claim 9. The invention according to claim 16 is 5 to 0.063 m from the coal raw material 13 from which the magnetic material has been removed.
a first sieve 11 for classifying a coal raw material 13 having a particle size of m
The ultrasonic selector (18) according to claim 9, which separates the coal raw material (13) classified by the first sieve (11) into carbonaceous matter (13a) and impurities (13b), and an ultrasonic selector (18) from the coal raw material (13) from which the magnetic material has been removed. A second sieve 12 for classifying the coal raw material 13 having a particle size of 5 to 0.5 mm smaller than the coal raw material 13 conveyed to the coal raw material 13 and the coal raw material 13 classified by the second sieve 12 into a carbonaceous matter 13a and impurities 13b. A dry coal separation apparatus comprising: the electromagnetic induction selector 19 according to claim 8 which is separated from each other. The invention according to claim 17 is characterized in that 15 to 15 of the coal raw materials 13 from which the magnetic material has been removed.
A first sieve 12 for classifying a coal raw material 13 having a particle size of 0.5 mm, and a coal raw material 13 classified by the first sieve 11
The coal components 13a and an electromagnetic induction selector 19 according to claim 8, separated from one another and impurities 13b, the classified conveyed coal feed 13 is smaller than 2mm to electromagnetic induction selector 19 by the first sieve 11 or less, or 2 to 0. A dry coal separation apparatus provided with the electrostatic selector 20 according to claim 10, which separates the coal raw material 13 having a particle size of 05 mm into a carbonaceous component 13a and an impurity 13b. The invention according to claim 18 is a method wherein 5 to 0.063 of the coal raw material 13 from which the magnetic material is removed is used.
First sieve 11 for classifying coal raw material 13 having a particle size of 1 mm
10. The coal raw material 13 classified by the first sieve 11 is separated into a carbonaceous material 13a and impurities 13b.
And the coal raw material 13 having a particle size of 2 mm or less or a particle size of 2 to 0.05 mm smaller than the coal raw material 13 classified by the second sieve 11 and conveyed to the ultrasonic selector 18. And an electrostatic selector according to claim 10 which is separated from each other.

According to a nineteenth aspect of the present invention, the first sieve 11 for classifying the coal raw material 13 having a particle size of 15 to 0.063 mm from the coal raw material 13 from which the magnetic material has been removed, and the classification by the first sieve 11. 9. The electromagnetic induction selector 19 according to claim 8, wherein the separated coal raw material 13 is separated into a carbonaceous component 13a and an impurity 13b in which a part of the carbonaceous component 13a is mixed. Carbonaceous matter 1
It is a dry coal separation apparatus provided with the ultrasonic selector 18 according to claim 9, which is separated into 3a and impurities 13b from each other. The invention according to claim 20 provides the coal raw material 1 from which the magnetic material has been removed.
3, a first sieve 11 for classifying a coal raw material 13 having a particle size of 5 to 0.063 mm, and a coal raw material 13 classified by the first sieve 11 is partially converted into a carbonaceous material 13a and a carbonaceous material 13a.
10. A is separated from impurities 13b in which a is mixed.
And the carbonaceous material 13a
13b mixed with carbonaceous 13a and impurity 13b
9. The electromagnetic induction selector 1 according to claim 8, which is separated from each other.
9 is a dry coal preparation apparatus. The invention according to claim 21 is characterized in that 15 m from the coal raw material 13 from which the magnetic material has been removed.
m, or a first sieve 12 for classifying a coal raw material 13 having a particle diameter of 15 to 0.05 mm, and a coal raw material 13 classified by the first sieve 12
and a is separated from each other into impurities 13b in which a is mixed.
The electromagnetic induction selector 19 according to
a mixed with the carbonaceous material 13a and the impurity 13
11. The electrostatic selector 2 according to claim 10, wherein the electrostatic selectors are separated from each other.
0 is a dry coal preparation apparatus. The invention according to claim 22 is characterized in that 5 mm from the coal raw material 13 from which the magnetic material has been removed.
A second sieve 11 for classifying the coal raw material 13 having a particle size of 5 to 0.05 mm or less, and an impurity 13b in which the coal raw material 13 classified by the second sieve 11 is mixed with the carbonaceous material 13a and partially containing the carbonaceous material 13a The ultrasonic selector 18 according to claim 9, which separates the impurities 13b in which the carbonaceous material 13a is partially mixed into the carbonaceous materials 13a and the impurities 13b. It is a dry coal preparation device equipped with.

[0016]

Next, a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 11, the dry coal separation apparatus is an apparatus that separates a coal raw material 13 in which a carbonaceous component 13a and an impurity 13b are mixed into a carbonaceous component 13a and an impurity 13b. The carbonaceous matter 13a is a combustible component, and the impurity 13b is a magnetic substance (not shown), ash 13d, sulfide, or the like in this example. Dry coal preparation equipment is coal raw material 1
A drying device 14a for drying the raw coal 3
, A magnetic material removing device 17 for removing the magnetic material in the pulverized coal raw material 13, and a coal material 13 from which the magnetic material has been removed, for example, 5-4 mm, 4-3 mm and 3-2. A first sieve 11 for classifying into a coal raw material 13 having a particle size in three ranges of 5 mm; An ultrasonic selector 18 that separates the coal raw material 13 by the difference and a coal raw material 13 having a smaller particle size than the coal raw material 13 classified by the first sieve 11 are, for example, 2.5-2 mm, 2-1.5 mm, and 1.5-1 mm. A second sieve 12 for classifying into a coal raw material 13 having a particle size in two ranges, and a coal raw material 13 classified by the second sieve 12
Induction selector 19 that separates the coal raw material 13 into a carbonaceous material 13a and an impurity 13b by an electromagnetic force; And an electrostatic selector 20 which is separated by Coulomb force.

The magnetic material removing device 17 is configured to remove a magnetic material mixed in the coal raw material 13 pulverized by the pulverizing device 16 using a permanent magnet or an electromagnet (not shown). The first sieve 11 is a coal raw material 13 having a particle size of 5 mm or less.
Portion 11a through which coal raw material 13 having a particle size exceeding 5 mm cannot pass and sieve portion through which coal raw material 13 having a particle size of 4 mm or less can pass and coal raw material 13 having a particle size exceeding 4 mm cannot pass. 11b, a sieve portion (not shown) through which the coal raw material 13 having a particle size of 3 mm or less can pass and through which the coal raw material 13 having a particle size exceeding 3 mm cannot pass; A sieve portion through which the coal raw material 13 having a particle size exceeding 2.5 mm cannot pass is connected in series with a sieve portion through which the coal raw material 13 can pass. Sieve part 11
The coal raw material 13 having a particle size exceeding 5 mm removed by a is returned to the crusher 16 and classified by the sieves 11a and 11b into 5 to 4 mm, 4 to 3 mm and 3 to 4 mm, respectively.
Coal raw material 13 having a particle size in three ranges of 2.5 mm is supplied to three first hopper shooters 21. FIG. 1 shows only one set of the first hopper shooter 21, the first feeder 31, and the ultrasonic selector 18, respectively. However, the same number of the first hopper shooters 21 as the number of classes by the first sieve 11, First feeder 31 and ultrasonic selector 1
8 are provided respectively. In this example, the first hopper shooter 21, the first feeder 31, and the ultrasonic selector 18 are 3
Set is provided.

The coal raw material 13 dropped from the first hopper shooter 21 is supplied to a first feeder 31. The first feeder 31 includes a driving pulley 31a and a driven pulley 31b.
And a belt 31c stretched over these pulleys 31a and 31b (FIG. 1). The ultrasonic selector 18 is attached to a stay 24 rotatably fitted via a bearing 24a to a fixed support shaft 31d that rotatably holds the driven pulley 31b (FIG. 3). The stay 24 has a boss portion 24b fitted to the fixed support shaft 31d via a bearing 24a, and an arm portion 24c fixed to the boss portion 24b and having an ultrasonic selector 18 attached to a tip end surface. The ultrasonic selector 18 is attached to the stay 24 via a damper 26 and slidably abuts on the lower surface of the belt 31c at a predetermined inclination angle with respect to a horizontal plane, and generates ultrasonic vibration on the vibration plate 27. And an ultrasonic wave generating means 28 (FIG. 4). The ultrasonic wave generating means 28 is provided with a slight gap from the diaphragm 27 and has a substantially inverted U-shaped ferrite vibrator 28a having a pair of arms 28b, 28b, and a pair of arms 28.
and a coil 28d wound around a pair of arms 28b, 28b. The ferrite vibrator 28a is a vibrator called a magnetostrictive type or a π type.

The coil 28d is connected to an AC power supply via an output circuit 28e, an ultrasonic oscillation circuit 28f, and a power supply circuit 28g, and the oscillation frequency and output of the coil 28d are adjusted by the ultrasonic oscillation circuit 28f and the output circuit 28e, respectively. It is configured to be possible. When the current whose oscillation frequency and output have been adjusted flows through the coil 28d, an alternating magnetic field corresponding to the current is generated in the ferrite vibrator 28a, and the belt 31c passes through the diaphragm 27 at a predetermined frequency and a predetermined amplitude. It is designed to vibrate sound waves. Further, the stay 24 moves the diaphragm 27 from the horizontal plane by 0 ° to the tilt angle adjusting means 29.
It is configured to be adjustable in the range of 90 ° (FIG. 3). The inclination angle adjusting means 29 is provided on the outer peripheral surface of the boss portion 24b.
A plurality of teeth 29a formed on the outer peripheral surface opposite to the outer peripheral surface to which the fixing member 4 is fixed, a rack 29b meshing with the teeth 29a, and an output shaft 29c formed integrally with the rack 29b; It has a linear solenoid 29d capable of moving the output shaft 29c in the longitudinal direction. In addition, the driven pulley 31
b, an impurity bucket 35 for accommodating the coal raw material 13 having a carbon content 13a of less than a predetermined amount is placed, and a carbon material 13a of a predetermined amount or more is located farther from the driven pulley 31b than the impurity bucket 35. Coal raw material 13 having
Is placed (see FIG. 1).

2.5 mm removed by the first sieve 11
A coal raw material 13 having the following particle size is supplied to the second sieve 12 (FIGS. 1 and 2). The second sieve 12 is the first sieve 11
And 2.5 to 2 m by the second sieve 12.
m, 2-1.5 mm and 1.5-1 mm. 2.5 to 2 mm, 2 to 1.5 mm, and 1.5 to 2 mm classified by the second sieve 12, respectively.
The coal raw material 13 having a particle diameter of 1 mm is supplied to three second hopper shooters 22 via a drying device 14b. Although only one set of the second hopper shooter 22, the second feeder 32, and the electromagnetic induction selector 19 is shown in FIG. 1, each of the second hopper shooters 22, A second feeder 32 and an electromagnetic induction selector 19 are provided, respectively. In this example, three sets of the second hopper shooter 22, the second feeder 32, and the electromagnetic induction selector 19 are provided. 2nd hopper shooter 2
The coal raw material 13 dropped from 2 is supplied to the second feeder 32. The second feeder 32 has a driving pulley 32a, a driven pulley 32b, and a belt 32c stretched over these pulleys 32a, 32b. Electromagnetic induction selector 1
9 is a fixed support shaft 3 for rotatably holding the driven pulley 32b.
It is attached to a stay 37 rotatably fitted in 2d via a bearing 37a (FIG. 5). Stay 37 is fixed support shaft 3
A boss portion 37b fitted into the 2d via a bearing 37a;
An arm 37c fixed to the boss 37b and having the electromagnetic induction selector 19 attached to the tip end surface.

The electromagnetic induction selector 19 includes a magnetic field generating electromagnet 38 for generating a constant magnetic field in a direction substantially perpendicular to the traveling direction of the belt 32c in the same plane as the belt 32c;
An eddy current generating electromagnet 39 for generating an eddy current in the conductive coal raw material 13 is provided (FIGS. 6 and 7). The electromagnet 38 for generating a magnetic field includes a substantially C-shaped iron core 38a and this iron core 3a.
The eddy current generating electromagnet 39 has a substantially C-shaped iron core 39a and an AC power source (not shown) wound around the coil portion 8a. The coil portion 38b is connected to a DC power supply (not shown). (Not shown).
The stay 37 adjusts the surface of the leading end of the magnetic field generating electromagnet 38 and the leading end of the eddy current generating electromagnet 39 facing the back surface of the belt 32c in the range of 0 ° to 90 ° with respect to the horizontal plane by the inclination angle adjusting means 40. It is configured to be possible (FIG. 5).
The inclination angle adjusting means 40 includes a plurality of teeth 40a formed on the outer peripheral surface of the boss portion 37b opposite to the outer peripheral surface to which the stay 37 is fixed, and a rack 40b meshed with these teeth 40a. , An output shaft 40c formed integrally with the rack 40b, and a linear solenoid 40d capable of moving the output shaft 40c in the longitudinal direction. 41 is a brush for removing the coal raw material 13 from the belt 32c. An ash bucket 42 is placed below the driven pulley 32b, and a carbonaceous bucket 43 is placed at a predetermined distance from the driven pulley 32b.
An intermediate substance bucket 44 is placed between the fuel cell 2 and the carbonaceous material bucket 43 (FIG. 1).

The coal raw material 13 having a particle size of 1 mm or less removed by the second sieve 12 is supplied to a third feeder 33 via a drying device 14c and a third hopper shooter 23.
The third feeder 33 includes a driving pulley 33a and a driven pulley 3a.
3b, and a belt 33c stretched over these pulleys 33a, 33b. Above a predetermined distance from the third feeder 33, a fourth feeder 34 is provided in parallel with the third feeder 33 by being shifted by a predetermined distance in the longitudinal direction. The fourth feeder 34 also has a drive pulley 34a.
, A driven pulley 34b, and these pulleys 34a, 34
b. Belt 34
In this example, c is formed of an electrically insulating and flexible silicone resin. The electrostatic selector 20 is the belt 3
3c, a plate-like first electrode 51 provided along the back surface of the belt 33c facing the belt 34c;
A plate-shaped second electrode 52 provided along the back surface of the belt 34c facing the belt 33c, a vibrator 46 for vibrating the belt 33c in a direction perpendicular to the upper surface thereof via the first electrode 51, Heaters 47 to 49 provided on the outer peripheral surface of the three hopper shooter 23, near the first electrode 51, and near the second electrode 52, respectively;
3 is provided near the lower end.

The first and second electrodes 51 and 52 are electrically connected to a high voltage pulse generator 54 (FIG. 9). The high-voltage pulse generator 54 includes first and second high-voltage generators 54a and 54b and a high-frequency generator 5 as shown in detail in FIG.
4c, two capacitors 54d, 54d, and two choke coils 54e, 54e. First and second
The DC high voltage generated by the high voltage generators 54a and 54b is configured to be adjustable in the range of 0 to 30 kV, and the frequency generated by the high frequency generator 54c is 10 kV.
It is configured to be adjustable in the range of Hz to 100 MHz. By superimposing the high frequency generated by the high frequency generator 54c on the DC high voltage generated by the first high voltage generator 54a, a high voltage pulse that changes on the positive side as shown in FIG. The superposed high frequency generated by the high frequency generator 54c is superimposed on the supplied DC high voltage generated by the second high voltage generator 54b, so that the high voltage that changes on the negative side as shown in FIG. A voltage pulse is supplied. Thus, the first and second
The reason why a high voltage pulse is supplied to the electrodes 51 and 52 instead of a constant high voltage is that the first and second pulses are applied when a constant high voltage is applied.
Since the charges charged to the electrodes 51 and 52 are saturated and the separation of the coal raw material 13 supplied to the third feeder 33 becomes impossible, the charges charged to the first and second electrodes 51 and 52 are not saturated. In order to

The two capacitors 54d, 54d are provided to prevent the DC high voltage current generated by the first and second high voltage generators 54a, 54b from flowing to the high frequency generator 54c. Reference numerals 54e and 54e are provided to prevent a high-frequency current generated by the high-frequency generator 54c from flowing to the first and second high-voltage generators 54a and 54b. The period (T ₁ + T ₂ ) of the output waveforms shown in FIGS. 10 and 11 is set to a value not more than four times the time constant due to the capacitance of the first and second electrodes 51 and 52. Preferably, it is set to a value slightly smaller than twice the above time constant. The electric field intensity between the first and second electrodes 51 and 52 is set within a range where air does not cause dielectric breakdown, that is, within 3 × 10 ⁶ V / m.

The heaters 47 to 49 are the third hopper shooter 2
3 by heating the coal raw material 13 attracted to the third feeder 33 by the first electrode 51 or the coal raw material 13 attracted to the fourth feeder 34 by the second electrode 52. The pyroelectric effect on the polarized coal raw material 13 of the raw material 13, that is, the polarization of the polarized coal raw material 13 increases, and the electric charge on the surface of the polarized coal raw material 13 increases in a direction to cancel the polarization. Phenomena appear, and as a result, the polarized coal raw material 13
(FIG. 1). A high-voltage pulse generated by the high-voltage pulse generator 54 is supplied to the charge promotion unit 53, and a third voltage is supplied from the charge promotion unit 53.
It is provided to irradiate the coal raw material 13 in the hopper shooter 23 with electrons or to remove electrons from the coal raw material 13 in the third hopper shooter 23 to promote charging of the chargeable coal raw material 13.

The third feeder 3 is located near the third feeder 33.
An auxiliary electrode 56 having an edge-shaped tip and a rod-shaped auxiliary electrode 57 having a tip for causing the coal raw material 13 conveyed by 3 to fly out by Coulomb force are provided. Two electrodes 51, 5
An ion wind generating means 58 is provided for generating a wind for transporting the floating material 13f of the coal raw material 13 floating between the two toward the driven pulley 33b side of the third feeder 33. Auxiliary electrode 56,
57 and the ion wind generator 58 are electrically connected to the high voltage pulse generator 54, respectively. Auxiliary electrodes 56, 5
In this example, a negative voltage opposite to that of the first electrode 51 is applied to 7, and a negative voltage is also applied to the ion wind generating means 58 to collide electrons with air to generate ion wind. An ash bucket 61 is placed below the driven pulley 33b of the third feeder 33, and a carbonaceous bucket 62 is placed below the driven pulley 34b of the fourth feeder. An intermediate substance bucket 63 is placed next to the ash bucket 61, and a suspended matter bucket 64 is placed between the intermediate substance bucket 63 and the carbonaceous substance bucket 62. Also, 65 and 66 transfer the coal raw material 13 to the belt 33.
brushes to be detached from c and 34c, respectively.
Reference numerals 68 denote erasers for removing charges charged on the belts 33c and 34c from the belts 33c and 34c. Reference numeral 69 denotes a screen for guiding the floating material 13f of the coal raw material 13 to the floating material bucket 64.

The operation of the thus-configured dry coal preparation apparatus will be described. Coal raw material 1 supplied to the first feeder 31
3 has a particle size of approximately 5 to 2.5 mm and is substantially uniform, the specific gravity of the coal raw material 13 having a predetermined amount or more of the carbonaceous material 13a is 1.6 or less, and the coal raw material having a carbonaceous material 13a of less than a predetermined amount. Since the specific gravity of 13 exceeds 1.6, the mass m ₁ of the coal raw material 13 having the carbonaceous content 13a equal to or more than the predetermined amount is smaller than the mass m _{2 of the} coal raw material 13 having the carbonaceous content 13a less than the predetermined amount. On the other hand, the coal raw material 13 arriving at a position facing the diaphragm 27 of the ultrasonic selector 18, that is, any one of the coal raw material 13 having a carbon content 13 a of a predetermined amount or more and the coal raw material 13 having a carbon content 13 a of a predetermined amount or less. Also diaphragm 27
And the same force f (FIG. 4) acts in the vertical direction. As a result, the coal feed 1 having a predetermined amount or more of the carbonaceous material 13a
The acceleration acting on α3 is α _1, and the carbonaceous matter 1 less than a predetermined amount
When the acceleration alpha ₂ acting on the coal feed 13 having 3a, the _{f = m 1 × α 1 =} m 2 × α 2. Here, m ₁ <m ₂
, Α ₁ > α ₂ , and the coal raw material 13 having the carbonaceous content 13a equal to or more than the predetermined amount bounces obliquely upward and higher than the coal raw material 13 having the carbon content 13a less than the predetermined amount, and the transport speed of the first feeder 31 is positive So they fly far.
Therefore, the coal material 13 having a carbon content 13a of less than a predetermined amount is stored in the impurity bucket 35, and the coal material 13 having a carbon content 13a of a predetermined amount or more is stored in the carbon bucket 36.

Coal raw material 1 supplied to the second feeder 32
When 3 comes to a position facing the electromagnetic induction selector 19, an electromagnetic force F (FIGS. 6 and 7) is generated in the coal material 13 having conductivity. This principle will be described with reference to FIG. There occurs alternately, the magnetic field is constant magnetic flux density B shown by the broken line arrows is generated by the magnetic field generating electromagnet 38. Next, when an eddy current I is generated in the direction indicated by a two-dot chain line arrow in the conductive coal raw material 13 and the path length of the eddy current I is L, the electromagnetic force F = B
× I × L holds. As a result, assuming that the magnetic flux density B and the path length L of the eddy current I are constant, the electromagnetic force F increases as the eddy current I increases. Coal raw material 1 having
3 is a coal raw material 13 containing less than a predetermined amount of carbonaceous matter 13a,
That is, it flies farther than the coal raw material 13 having a small electric conductivity. Therefore, the ash bucket 42 accommodates the coal raw material 13 showing little conductivity and having a carbon content 13a less than a predetermined amount, and the carbon content bucket 43 shows a large conductivity and a carbon content more than a predetermined amount. The coal raw material 13 having the fraction 13a is stored, and the intermediate substance bucket 44 stores an intermediate substance 13e having relatively small conductivity. The intermediate substance 13e stored in the intermediate substance bucket 44 is returned to the drying device 14b. This is for completely removing the moisture of the intermediate substance 13e and separating the coal raw material 13 more accurately.

Of the coal raw materials 13 charged into the third hopper shooter 33, the coal raw materials 13 that are easily rubbed against each other and are easily charged are positively or negatively charged according to their polarities. Even if the coal material 13 is easily charged, if the charge is small, the charge of the coal material 13 is increased by heating by the heater 47 or by giving and receiving electrons by the charge promoting unit 53 and supplied to the third feeder 33. Is done. In this example, it is assumed that the coal raw material 13 having the carbonaceous content 13a of a predetermined amount or more is positively charged, and the coal raw material 13 having the carbonaceous content 13a of less than the predetermined amount is negatively charged or not charged at all. However, the coal content 13a in the coal raw material 13
Is small depending on the distribution of the carbonaceous matter 13a depending on the degree of distribution.

Coal raw material 1 supplied to the third feeder 33
Of the three, the positively charged coal raw material 13 is attracted to the second electrode 52 by the Coulomb force, adheres to the belt 34c of the fourth feeder 34, is conveyed by the belt 34c, and is stored in the coal content bucket 62. . The negatively charged coal raw material 13 is attracted to the first electrode 51 by Coulomb force, is conveyed while being attached to the belt 33 c of the third feeder 33, and is stored in the ash bucket 61. The non-charged coal raw material 13 is also conveyed by the third feeder 33 and stored in the ash bucket 61. Further, since the gravity of the coal raw material 13 which is positively or negatively charged but whose charge is small is larger than the Coulomb force acting on the coal raw material 13, the coal raw material 13 is applied to the driven pulley 33 b while being placed on the belt 33 c of the third feeder 33. This coal raw material 13
It is ejected by a predetermined distance due to the Coulomb force between the electrode and the auxiliary electrodes 56 and 57 and is stored in the intermediate substance bucket 63.
The coal raw material 13 having a very small particle size is used for the first and second electrodes 5.
1 and 52 are floated, transported by the ion wind generated by the ion wind generator 58, and stored in the floating bucket 58. The intermediate substance 13e stored in the intermediate substance bucket 63 is returned to the drying device 14c. This is for completely removing the moisture of the intermediate substance 13e and separating the coal raw material 13 more accurately.

FIGS. 12 and 13 show a second embodiment of the present invention. 12, the same reference numerals as those in FIG. 1 indicate the same parts. The coal raw material 13 having a carbon content 13a less than a predetermined amount separated by the ultrasonic selector 18 and stored in the impurity bucket 35 is supplied to the second feeder 32 through the drying device 14b and the second hopper shooter 22, and is subjected to electromagnetic induction. Intermediate substance bucket 44 separated by selector 19
Intermediate material 13e having a relatively small conductivity and housed therein
Is supplied to the third feeder 33 via the drying device 14c and the third hopper shooter 23. In addition, the first sieve 11
Coal feedstock 13 which has passed also supplied to the third feeder 33 via the drying device 14c and the third hopper chute 23, the
The second sieve of the first embodiment becomes unnecessary. Except for the above, the configuration is substantially the same as that of the first embodiment. The operation of the dry coal preparation apparatus thus configured is substantially the same as that of the first embodiment, and therefore, the description thereof will not be repeated.

FIG. 14 shows a third embodiment of the present invention. The ultrasonic selector 78 includes a hopper shooter 81, a diaphragm 87 for receiving the coal raw material 13 dropped from the shooter 81, and an ultrasonic generator 88 for generating ultrasonic vibration on the diaphragm 87. The vibration plate 87 is formed of, for example, a metal plate such as an iron plate or an aluminum plate having a length, width, and thickness of 700 mm, 400 mm, and 3 mm, respectively. The dimensions of the diaphragm 87 are merely examples, and are not limited to these values. Although not shown, the ultrasonic wave generating means 88 is configured in the same manner as the ultrasonic wave generating means of the first embodiment, and the ultrasonic wave generating means 88 enables the vibration plate 87 to be ultrasonically vibrated at a predetermined frequency and a predetermined amplitude. You. Diaphragm 8
7 is attached to a base plate 82 via a pair of inclination angle adjusting means 89, 89, and the base plate 82 is attached to a base 84 via a damper 83. A pair of inclination angle adjusting means 8
9 and 89 are formed so as to be expandable and contractible, and are configured so that the diaphragm 87 can be adjusted at an angle in the range of 0 ° to 15 ° with respect to the horizontal plane by expansion and contraction. Impure under the upper end of diaphragm 87
A goods bucket 85 is placed, and a carbonaceous material bucket 86 is placed below the lower end of the diaphragm 87.

In the dry coal preparation apparatus configured as described above,
When the vibration plate 87 is ultrasonically vibrated at a predetermined frequency and a predetermined amplitude by setting the vibration plate 87 at a predetermined angle, the coal material 13 falling from the hopper shooter 81 and having a substantially uniform particle diameter has a carbon content of less than a predetermined amount. The coal raw material 13 having 13a, that is, the coal raw material 13 having a specific gravity of not less than a predetermined value is stored in the ash bucket 85 up the inclined surface of the diaphragm 87, and the coal raw material 13 having the carbon content 13a of not less than a predetermined amount, that is, specific gravity. Is lower than the predetermined value, and is stored in the coal content bucket 86 down the inclined surface of the diaphragm 87. The present applicant has confirmed the above phenomenon by experiments. Although it has not been clarified theoretically, the standing wave is generated by the vibration of the diaphragm 87 by the ultrasonic vibration at the predetermined frequency and the predetermined amplitude, and the standing wave is generated by the interaction between the standing wave and the vibration mode. It is thought that it was.

FIG. 15 shows a fourth embodiment of the present invention. 15, the same reference numerals as those in FIG. 14 indicate the same parts. A vibration plate 87 is attached to a base plate 82 via a damper 83, and the base plate 82 is
The configuration is substantially the same as that of the third embodiment except that it is attached to the base 84 via 9, 89. The operation of the dry-type coal preparation apparatus thus configured is substantially the same as that of the third embodiment, and the description thereof will not be repeated.

FIGS. 16 to 19 show a fifth embodiment of the present invention. 16 to 19, the same reference numerals as those in FIG. 1 indicate the same parts. First and second electrodes 101 and 102 of the electrostatic selector 100 are erected on both side surfaces of the third feeder 33 at a predetermined interval from the both side surfaces, respectively. First and second separators 111 and 112 formed of a fluororesin are respectively provided upright on the surface facing the side surface of 33.
An auxiliary electrode 103 is provided above the third feeder 33 along the longitudinal direction of the feeder 33, and a ground plate 104 is provided on the back surface of the belt 33c. A positive or negative voltage is applied to the auxiliary electrode 103 according to the physical properties of the coal raw material 13 on the third feeder 33. First electrode 101
An ash bucket 106 having a carbonaceous content 13a of less than a predetermined amount and containing a chargeable coal raw material 13 is placed below the first separator 111, and below the second electrode 102 and the second separator 112. Is the carbonaceous content 1 or more
An ash bucket 108 is placed under the driven pulley 33b below the driven pulley 33b. The ash bucket 108 contains less than a predetermined amount of coal 13a and accommodates the non-chargeable coal raw material 13. Is placed. An auxiliary feeder 109 supplies the coal raw material 13 to the third hopper shooter 23 (FIGS. 16 to 18).

Although the first and second electrodes 101 and 102 are not shown, the first and second electrodes of the high-voltage pulse generator of the first embodiment are not shown.
Each is electrically connected to a high voltage generator. Also the first
The second electrodes 101 and 102 are electrically connected to voltage variable devices 113 and 114, respectively, as shown in detail in FIG. The voltage variable device 113 includes a DC power supply 113b electrically connected to the first electrode 101 via a potentiometer 113a, and a potentiometer 1 connected to the second electrode 102.
And a DC power supply 114b electrically connected through the power supply 14a. The DC power supplies 113b and 114b are electrically connected to each other, and are grounded together with the ground plate 104. By adjusting the potentiometers 113a and 114a respectively, the voltage between the coal material 13 on the first electrode 101 and the third feeder 33 and the voltage between the coal material 13 on the second electrode 102 and the third feeder 33 are respectively adjusted. It is controlled to be a predetermined value, and the coal feed 1 on the third feeder 33 is controlled.
3 can be reliably separated into a coal raw material 13 having a carbon content 13a of a predetermined amount or more and a coal raw material 13 having a carbon content 13a of a predetermined amount or less. The auxiliary electrode 103
Is configured so that the voltage can be adjusted by a potentiometer 116. The operation of the thus-configured dry coal preparation apparatus is substantially the same as that of the electrostatic selector of the first embodiment, and therefore, the description thereof will not be repeated.

FIG. 20 shows a sixth embodiment of the present invention. 20, the same reference numerals as those in the first embodiment denote the same components. A magnetic material removing device 121 is provided above the second feeder 32, and an auxiliary electrode 56 having an edge-shaped tip and a rod-shaped tip for ejecting the coal raw material 13 by Coulomb force near the electromagnetic induction selector 19 provided in the feeder 32. Auxiliary electrode 57 is provided. These auxiliary electrodes 56 and 57 are connected to the coal raw material 13 on the second feeder 32.
A positive or negative voltage is applied depending on the physical properties of the substrate. The magnetic material removing device 121 includes a magnetic material feeder 12 provided with one end approaching the coal raw material 13 on the second feeder 32 and the other end inclined in a direction away from the second feeder 32.
2 and a magnetic bucket 123 placed below the other end of the magnetic feeder 122. Magnetic feeder 122
Is a drive pulley 122a, a driven pulley 122b, and a belt 1 bridged over these pulleys 122a and 122b.
22c. Numerous electromagnets 124 mounted at predetermined intervals on the belt 122c, these electromagnets 124 together move the belt 122c, the driving pulley 1
Turns on when moving from the driven pulley 122b to the driven pulley 122b.
It is turned off when moving toward a. 126 is a magnetic body 13c attached to the belt 122c
Is a brush that separates from the belt 122c.

In the dry coal preparation apparatus configured as described above,
Magnetic material 1 mixed in coal raw material 13 on second feeder 32
3c is attracted by the electromagnet 124 by its magnetic force and adheres to the belt 122c. In this state, the magnetic material 13c is placed near the driven pulley 122b, that is
Arrives, the electromagnet 124 is turned off and the magnetic body 13
c is stored in the bucket 123. Operations other than those described above are substantially the same as those in the first embodiment, and a repeated description thereof will be omitted.

In the first embodiment, the first feeder is provided with an ultrasonic selector and the second feeder is provided with an electromagnetic induction selector. However, the first feeder is provided with an electromagnetic induction selector, and the second feeder is provided with an ultrasonic selector. A selector may be provided. Further, among the three selectors of the first embodiment, the ultrasonic selector, the electromagnetic induction selector, and the electrostatic selector, any one or two selectors may be used to configure the dry coal preparation apparatus. In the first embodiment, if the coal raw material can be sufficiently separated by the electrostatic selector only by charging the coal raw material due to the friction in the third hopper shooter, the heater and the charging promotion unit become unnecessary. In the first embodiment, a vibrator called a magnetostrictive type or a π type is used as the ferrite vibrator of the ultrasonic selector, but a vibrator called an electrostrictive type or a NA type may be used.

Further, in the first embodiment, a coal material having a particle size of 5 to 2.5 mm is reduced to 5 to 4 mm by a first sieve.
3 mm and 3 to 2.5 mm were classified into coal raw materials having particle sizes of 3 to 2.5 mm.
63 mm, preferably 5-0.25 mm coal feed
It can be classified into a coal raw material having a particle size of not more than one or four or more ranges. The more finely the coal raw material is classified so that the particle diameters thereof become substantially the same, the more the coal selection efficiency by the ultrasonic selector is improved. The reason why the particle size of the coal raw material supplied to the ultrasonic selector is limited to 5 to 0.063 mm is that if the particle size of the coal raw material exceeds 5 mm or is less than 0.063 mm, the coal based on the difference in specific gravity is used. This is because it becomes difficult to separate the coal raw material due to the difference in the movement of the raw material.
Further, in the first embodiment, the coal material having a particle size of 2.5 to 1 mm is reduced to 2.5 to 2 mm, 2 to 1.
Classified into coal raw materials having particle diameters in three ranges of 5 mm and 1.5 to 1 mm, but the particle diameter was 5 to 0.5 m by the second sieve.
m, preferably 15 to 1 mm, can be classified into a coal raw material having a particle size of 2 or less or 4 or more. When the electromagnetic induction selector is provided in the first feeder, it is possible to classify coal raw materials having a particle size of 15 to 0.5 mm, preferably 15 to 1 mm. The more finely the coal raw material is classified so that the particle diameters are substantially the same, the more the coal selection efficiency by the electromagnetic induction selector is improved. Particle size of coal raw material supplied to electromagnetic induction selector is 15-0.5m
The reason for limiting to m is that if the particle size of the coal raw material exceeds 15 mm or is less than 0.5 mm, it is difficult to separate the coal raw material by the electromagnetic force generated in the coal raw material due to the interaction of the eddy current and the magnetic field. Because it becomes. In the first embodiment, the particle size of the coal raw material supplied to the electrostatic selector is set to 1 mm or less, but is set to 2 mm or less, preferably 2 to 0.
It is good to make it 05mm. The reason why the particle size of the coal raw material supplied to the electrostatic selector is limited to 2 mm or less is that if the particle size of the coal raw material exceeds 2 mm, it becomes difficult to separate the coal raw material by Coulomb force.

In the second embodiment, the first feeder is provided with the ultrasonic selector, and the second feeder is provided with the electromagnetic induction selector. However, the first feeder is provided with the electromagnetic induction selector, and the second feeder is provided with the ultrasonic selector. A selector may be provided. Further, any two selectors of the three selectors of the ultrasonic selector, the electromagnetic induction selector and the electrostatic selector of the second embodiment may be used to constitute a dry coal separation apparatus. In the fifth embodiment, the first and second electrodes are each one. However, the first and second electrodes are each divided into a plurality of pieces along the third feeder, and each of the divided electrodes is An ash bucket and a carbonaceous bucket which are similarly divided may be placed below. In this case, the divided buckets can be separated based on the difference in particle size in addition to the separation based on the degree of carbonaceous matter. That is, the coal raw material can be separated from the driving pulley of the third feeder to the driven pulley such that the particle diameter gradually increases.

Although the electromagnetic induction selector is provided in the second feeder in the sixth embodiment, an ultrasonic selector may be provided. In the sixth embodiment, a large number of electromagnets are attached to the belt of the magnetic substance removing device. However, permanent magnets may be attached to the belt. In this case, the substantially U-shaped permanent magnet is divided into three parts, a pair of arms and a single base. Can be strengthened or weakened. That is, the permanent magnet is turned on when the belt is moving from the driving pulley to the driven pulley, and is turned off when the belt is moving from the driven pulley to the driving pulley.
Further, the magnetic material removing device according to the sixth embodiment is the same as the first and second magnetic material removing devices.
The magnetic material removing device according to the sixth embodiment may be used, and the magnetic material removing device according to the sixth embodiment may be provided above the first feeder according to the first and second embodiments. Further, the first and second electrostatic selectors of the first and fifth embodiments
The polarities of the electrodes, auxiliary electrodes, and the like are merely examples, and are not limited thereto. The polarities can be changed as appropriate according to the physical properties of the coal raw material that differs depending on the place of production.

[0043]

【Example】

<Embodiment 1> The electrostatic selector 100 shown in FIGS.
Example 1 was a dry-type coal separation apparatus using the same. <Comparative Example 1> Although not shown, Comparative Example 1 used a wet coal separation apparatus using a carbon tetrachloride liquid having a specific gravity of 1.60 as a heavy liquid.
In this apparatus, a coal raw material classified into a predetermined particle size is charged into a liquid tank in which the carbon tetrachloride is stored, and the coal raw material is separated into a carbonaceous component and impurities by floating and sinking.

<Evaluation Test 1> As a coal raw material, a lignite coal raw material produced in Pakistan was used. Tables 1 and 2 show the particle size distribution of the coal raw material having a particle size of 2 mm or less and the component analysis values of the coal raw material in each particle size range obtained by pulverizing and classifying the coal raw material produced in Pakistan. The No. in Table 2 corresponds to the No. in Table 1, and the values shown for raw coal in Table 2 are the component analysis values of the coal raw material before pulverization. The sulfur analysis values in Table 2 are on an anhydrous basis, and the sulfur content in Table 2 is the proportion of the fraction by particle size in the coal raw material. Further, in Table 2, fixed carbon refers to a component obtained by subtracting water, ash, and volatile components from a coal raw material sample.

[0045]

[Table 1]

[0046]

[Table 2]

The above-mentioned coal raw material produced in Pakistan was supplied to the dry coal separation apparatus of Example 1 and the wet coal separation apparatus of Comparative Example 1 for 1 k each.
g of coal was charged. The recovery rate (%) of the carbonaceous material among the coal raw materials selected, the ratio of the ash content (%) and the sulfur content (%) mixed in the carbonaceous material, and the total calorific value (kcal) of the carbonaceous material were compared. . Further, the above-mentioned sulfur content was further analyzed, and the ratio between the non-combustible sulfur content (%) and the combustible sulfur content (%) was also compared. Table 3 shows the results. In addition, all the analysis values except the recovery rate in Table 3 are on an anhydrous basis,
The same applies to Tables 4 to 6 below.

[0048]

[Table 3]

As can be seen from Table 3, in Example 1, the ash content and combustible sulfur were reduced to 46% and 57%, respectively, as compared with the coal raw material (from Pakistan) itself, and the total calorific value was 3%.
0% increase. Also, in Example 1, the recovery rate, the ash content, and the combustible sulfur were higher by 10%, 13%, and 4%, respectively, and the total calorific value was lower by 4%, as compared with Comparative Example 1. It was possible to clean coal with almost the same efficiency.

<Evaluation Test 2> As a coal raw material to be coal-cleaned, a coal raw material having a particle size of less than 0.125 mm was removed.
A comparative test was performed in the same manner as in Evaluation Test 1 except that a coal raw material having a particle size of 000 to 0.125 mm was used. The impurities (waste stones) selected in Example 1 were also analyzed in the same manner as the carbonaceous matter. Table 4 shows the results.

[0051]

[Table 4]

As can be seen from Table 4, in Example 1, 2.0
Even when a coal raw material having a particle diameter of 00 to 0.125 mm was used, coal was able to be coalesced with substantially the same efficiency as in Comparative Example 1. Further, the reason why Comparative Example 1 in Table 1 is lower in coal separation efficiency than Comparative Example 1 in Table 2 is that the coal raw material used in Comparative Example 1 in Table 1 was 0.12%.
This is because a fine coal powder having a particle size of less than 5 mm is contained, and it takes a long time to float and separate the fine powder coal material, and it becomes difficult to adjust carbon tetrachloride due to the fine powder coal material. On the other hand, in Example 1, even if the fine powder was contained, the coal cleaning efficiency was hardly changed. As a result, it was found that in the present invention, coal raw materials having a wide range of particle sizes can be selected. Further, in Example 1, 11% was added to the impurities together with ash.
It contains a certain amount of combustible sulfur, and since this combustible sulfur is dry, it can be effectively used as a sulfur resource.

<Evaluation Test 3> A comparative test was performed in the same manner as in Evaluation Test 1 above, except that bituminous coal produced in China was used as a coal raw material for coal selection. Table 5 shows the results.

[0054]

[Table 5]

As can be seen from Table 5, in Example 1, the ash content and combustible sulfur were reduced to 22% and 72%, respectively, and the total calorific value was increased by 44% as compared with the coal raw material (produced in China). Further, Example 1 showed a coal cleaning efficiency substantially equal to that of Comparative Example 1.

<Evaluation Test 4> A coal raw material having a particle size of less than 0.063 mm was removed as a coal raw material to be coal-cleaned.
A comparative test was performed in the same manner as in Evaluation Test 3 except that a coal raw material having a particle size of 000 to 0.063 mm was used. Table 6 shows the results.

[0057]

[Table 6]

As can be seen from Table 6, in Example 1, ash and combustible sulfur were reduced to 21% and 72%, respectively, and the total calorific value was increased by 45%, as compared with the coal raw material (produced in China). . Further, Example 1 showed the same coal separation efficiency as Comparative Example 1. The reason why the coal separation efficiency of the Chinese raw material is higher than that of the Pakistani raw material is that the raw material is easily separated into carbonaceous particles and impurity particles during sample preparation such as grinding of the raw material.

[0059]

As described above, according to the dry coal separation method of the present invention, the coal raw material that has been dried, pulverized and the magnetic material removed can be separated into any one of the conductor separation step, the specific gravity separation step and the dielectric separation step. Through one or two or more processes, it is configured to separate into carbonaceous matter and impurities, so that even if the electromagnetic characteristics of the pulverized coal raw material particles are different, a coal raw material having a wide particle size range can be obtained. Can be sorted out. Further, compared to a conventional wet coal separation apparatus using a large amount of water, impurities can be removed with high efficiency without using any water. In particular, sulfide mixed in the coal raw material can be removed with high efficiency. In addition, an electromagnetic induction selector that separates the dried, ground, and magnetic material-removed coal raw material into carbonaceous matter and impurities by an electromagnetic force, and an ultrasonic wave that separates the carbonaceous matter and impurities into carbonaceous materials and impurities by a difference in motion based on the difference in their specific gravities. Any one of a selector and an electrostatic selector that separates coal and impurities by Coulomb force
The same effect as described above can be obtained even if one or more selectors are used to separate the carbonaceous matter and impurities. In addition, as compared with a conventional wet type coal separation apparatus in which the apparatus is large and the cost is increased, the apparatus of the present invention can be downsized, and can be manufactured at low cost and with high productivity.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a dry coal preparation apparatus according to a first embodiment of the present invention.

FIG. 2 is a flow sheet of the dry coal separation apparatus.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 1;

FIG. 4 is an enlarged sectional view of a portion B in FIG. 3;

FIG. 5 is an enlarged sectional view of a portion C in FIG. 1;

FIG. 6 is an enlarged sectional view of a part D in FIG. 5;

FIG. 7 is a sectional view taken along line EE of FIG. 6;

FIG. 8 is a principle diagram of conductor separation by an electromagnetic induction selector.

FIG. 9 is a circuit configuration diagram of a pulse generator that supplies a high-voltage pulse to first and second electrodes of the electrostatic selector.

FIG. 10 is an output waveform diagram of a high-voltage pulse supplied to the first electrode from the pulse generator.

FIG. 11 is an output waveform diagram of a high-voltage pulse supplied to the second electrode from the pulse generator.

FIG. 12 is a configuration diagram corresponding to FIG. 1 of a dry coal preparation apparatus according to a second embodiment of the present invention.

FIG. 13 is a flow sheet of the dry coal separation apparatus.

FIG. 14 is a configuration diagram of an ultrasonic selector according to a third embodiment of the present invention.

FIG. 15 is a configuration diagram corresponding to FIG. 14 of an ultrasonic selector according to a fourth embodiment of the present invention.

FIG. 16 is a perspective view of an electrostatic selector according to a fifth embodiment of the present invention.

FIG. 17 is a sectional view taken along line FF of FIG. 16;

18 is a view as viewed in the direction of the arrow G in FIG. 16;

FIG. 19 is an electric circuit diagram of the electrostatic selector.

FIG. 20 is a configuration diagram of a dry coal preparation apparatus according to a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st sieve 12 2nd sieve 13 Coal raw material 13a Carbonaceous matter 13b Impurity 13c Magnetic material 14a, 14b, 14c Drying device 16 Crushing device 17, 121 Magnetic material removing device 18, 78, 98 Ultrasonic selector 19 Electromagnetic induction selector 20, 100 Electrostatic selector 27, 87 Diaphragm 51, 52, 101, 102 Electrode

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Mitsushi Kamiide 11-11-1, Kita 19-Jo Nishi, Kita-ku, Sapporo City Inside the Hokkai Municipal Industrial Experimental Station (72) Inventor Hideho Murakami 6 Minami 14, Nishi, Chuo-ku, Sapporo 6 Chome 5-11 (72) Inventor Hiroshi Saito 3-38-13 Asagaminami, Suginami-ku, Tokyo (56) References JP-A-58-96695 (JP, A) JP-A-49-129264 (JP, A JP-A-1-258780 (JP, A) JP-A-63-310654 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) C10L 5/00-5/48 C10L 9 / 00-9/12 B03C 1/00-9/00 B07B 1/00-15/00

Claims (22)

(57) [Claims] The method includes a step of drying a coal raw material in which a carbonaceous component and impurities are mixed, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in impurities of the pulverized coal raw material. In the dry coal separation method, 15 to 0.5 out of the coal raw material from which the magnetic material has been removed.
a first classifying step of classifying a coal raw material having a particle diameter of 1 mm, and an eddy current generation for one or both of the conductive carbonaceous matter and the impurities among the coal raw materials classified in the first classifying step . An eddy current is generated by the electromagnet (39), and the conveying path of the coal raw material (13) is flush with the conveying surface of the coal raw material (13) by the magnetic field generating electromagnet (38).
Generates a predetermined magnetic field in the plane and in the direction perpendicular to the transport direction
And a conductor separation step of separating the classified coal raw material into the carbonaceous matter and the impurities by an electromagnetic force generated by the interaction of the eddy current and the magnetic field. Method. 2. A process for drying a coal raw material in which a carbonaceous component and impurities are mixed, a process for pulverizing the dried coal raw material, and a process for removing a magnetic substance in impurities of the pulverized coal raw material. In the dry coal separation method, 5 to 0.06 of the coal raw materials from which the magnetic material has been removed
A second classifying step of classifying a coal raw material having a particle size of 3 mm; and a second classifying step in which the diaphragm is inclined at a predetermined angle and vibrates in a direction perpendicular to the plate surface at a predetermined ultrasonic frequency and a predetermined amplitude. A specific gravity separation step of placing the coal raw material classified by the process and separating the classified coal raw material into the carbonaceous matter and the impurities by a difference in motion based on a difference in their specific gravities. Dry coal preparation method. 3. A method of drying a coal raw material containing a mixture of carbonaceous components and impurities, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in the impurities of the pulverized coal raw material. In the dry coal separation method, a third classification step of classifying a coal raw material having a particle diameter of 2 mm or less or 2 to 0.05 mm from the coal raw material from which the magnetic material has been removed, and coal classified by the third classification step Either or both of the carbonaceous content and the impurities in the raw material ,
Friction of coal raw material, heating by heater or in charge promotion section
In a state of being charged by electron transfer due to the transport between a pair of electrodes to which a predetermined voltage is applied, generated between the charged coal components and one or both said pair of electrodes of the impurity similar Coulomb force, different from the polarity of the electrodes
One of the carbonaceous matter or impurities charged to a certain polarity
A dry coal separation method, comprising: a dielectric separation step of separating the classified coal raw material into the carbonaceous matter and the impurities by attracting to the electrode . 4. A method of drying a coal raw material containing a mixture of carbonaceous components and impurities, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in the impurities of the pulverized coal raw material. In the dry coal separation method, 15 to 0.5 out of the coal raw material from which the magnetic material has been removed.
a first classification step of classifying a coal raw material having a particle size of 1 mm; and a conductor for the dry coal separation method according to claim 1, wherein the coal raw material classified in the first classification step is separated from the coal raw material and the impurities. A separation step, 5 to 0.063 smaller than the coal raw material transported to the conductor separation step from the coal raw material from which the magnetic material has been removed.
a second classification step of classifying a coal raw material having a particle size of mm, and a coal raw material classified by the second classification step is separated into the carbonaceous matter and the impurities from each other. A separation step; and a smaller than the coal raw material conveyed to the specific gravity separation step.
4. The dry coal separation method of claim 3, wherein the coal raw material having a particle diameter of 2 mm or less or 2 to 0.05 mm is separated into the carbonaceous matter and the impurities. Coal preparation method. 5. A method comprising the steps of: drying a coal raw material containing a mixture of carbonaceous matter and impurities; pulverizing the dried coal raw material; and removing a magnetic substance in impurities of the pulverized coal raw material. In the dry coal separation method, 5 to 0.06 of the coal raw materials from which the magnetic material has been removed
The specific gravity classification of the dry coal separation method according to claim 2, wherein a first classification step of classifying a coal raw material having a particle diameter of 3 mm, and the coal raw material classified in the first classification step are separated from each other into the carbonaceous matter and the impurities. Separation step, 5 to 0.5 mm smaller than the coal raw material transported to the specific gravity separation step from the coal raw material from which the magnetic material has been removed
2. A second classifying step of classifying a coal raw material having a particle size of (b), and separating the coal raw material classified by the second classifying step into the carbonaceous matter and the impurities from each other. And 2) smaller than the coal raw material conveyed to the conductor separation step.
4. The dry coal separation method of claim 3, wherein the coal raw material having a particle diameter of 2 mm or less or 2 to 0.05 mm is separated into the carbonaceous matter and the impurities. Coal preparation method. 6. A step of drying a coal raw material in which a carbonaceous component and impurities are mixed, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in impurities of the pulverized coal raw material. In the dry coal separation method, a first classification step of classifying a coal raw material having a particle size of 15 mm or less or 15 to 0.05 mm from the coal raw material from which the magnetic material has been removed; and a coal classified by the first classification step. 2. The conductor separation step of the dry coal separation method according to claim 1, wherein the raw material is separated into the carbonaceous material and the impurity in which the carbonaceous material is partially mixed. 3. The separation process according to the specific gravity of the dry coal separation method according to claim 2, wherein the carbonaceous component is partially and separately mixed with the impurity in which the carbonaceous component is mixed. The above Dry coal preparation method characterized by comprising the dielectric isolation process of dry coal cleaning method of claim 3 wherein separated from each other and said the quality content impurity in this order. 7. A step of drying a coal raw material in which a carbonaceous component and impurities are mixed, a step of pulverizing the dried coal raw material, and a step of removing a magnetic substance in impurities of the pulverized coal raw material. In the dry coal separation method, a first classification step of classifying a coal raw material having a particle size of 5 mm or less or 5 to 0.05 mm from the coal raw material from which the magnetic material has been removed; and a coal classified by the first classification step. 3. The separation step according to specific gravity of the dry coal separation method according to claim 2, wherein the raw material is separated into the carbonaceous matter and the impurities in which the carbonaceous matter is partially mixed. 2. The conductor separation step of the dry coal separation method according to claim 1, wherein the carbonaceous matter is partially and partly mixed with the impurities, and the carbonaceous matter is partially mixed and separated by the conductor separation step. The charcoal Dry coal preparation method characterized by comprising the dielectric isolation process of claim 3 dry coal preparation method according to separated from each other and the impurity and in this order. 8. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
A first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.5 mm; and the conductive carbonaceous material of the coal raw material (13) classified by the first sieve (11). (13a) and the impurity (13b)
Either or eddy current onset to generate eddy currents in both
The raw electromagnet (39) and the transfer route of the coal raw material (13)
Directly in the same direction as the transport surface of the coal
An electromagnet for generating a magnetic field that generates a predetermined magnetic field in the intersecting direction
(38), and the separated coal raw material (13) is separated into the carbonaceous matter (13a) and the impurities (13b) by the electromagnetic force generated by the interaction of the eddy current and the magnetic field. A dry coal separation apparatus, comprising: 9. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
A second classifier for classifying coal raw materials (13) having a particle size of ~ 0.063 mm
A sieve (12) and a diaphragm (27, 87) inclined at a predetermined angle and vibrated in a direction perpendicular to the plate surface at a predetermined ultrasonic frequency and a predetermined amplitude
The coal feed (1) classified by the second sieve (12)
3) and put the classified coal raw material (13) into the carbonaceous material (1).
3a) and the impurity (13b) are separated by an ultrasonic selector (18, 7
8,98). 10. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 2 out of the removed coal raw materials (13)
mm or a third sieve for classifying a coal raw material (13) having a particle size of 2 to 0.05 mm, and the carbonaceous material (13a) and the impurities (of the coal raw material (13) classified by the third sieve). 13b), the friction of the coal raw material (13), heating by the heater (47).
A pair of electrodes (51 and 51 ) to which a predetermined voltage is applied while charged by heat or by transfer of electrons by the charge promotion unit (53).
And 52, 101 and 102) , and the charged carbonaceous matter (13
a) and one or both of the impurities (13b) and the pair
Similar Coulomb force generated between the electrodes (51 and 52,101 and 102), the polarity of the electrodes (51 or 52,101 or 102)
Carbonaceous matter (13a) or impurity (13b) charged to different polarity
One of them is attracted to the electrode (51 or 52, 101 or 102)
A coal selector (20, 100) for separating the classified coal raw material (13) into the carbonaceous matter (13a) and the impurities (13b). 11. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous matter (13a) and an impurity (13b) are mixed, 16) and a magnetic material removing device (17,121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
A first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.5 mm; and a coal raw material classified by the first sieve (11), the coal material (13a) and the impurity (13b The electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, wherein the magnetic material (13c) is conveyed to the electromagnetic induction selector (19) from the removed coal raw material (13). A second sieve (12) for classifying a coal raw material (13) having a particle size of 5 to 0.063 mm smaller than the classified coal raw material (13); The ultrasonic selector (18, 78, 98) of the dry coal separation apparatus according to claim 9, wherein the ultrasonic separator is classified by the second sieve (12).
2mm smaller than the coal feed (13) transported to (18,78,98)
An electrostatic selector (20, 100) for a dry coal separation apparatus according to claim 10, wherein the coal raw material (13) having a particle size of 2 to 0.05 mm or less is separated from the coal material (13a) and the impurities (13b). A dry coal preparation apparatus, comprising: 12. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a pulverizing device (14) for pulverizing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
First classifier for classifying coal feedstock (13) with a particle size of ~ 0.063 mm
An ultrasonic selector (10) for a dry coal separation apparatus according to claim 9, wherein the coal raw material classified by the sieve (11) and the first sieve (11) is separated from each other into the carbonaceous matter (13a) and the impurities (13b). Coal raw material (13) transported to the ultrasonic selector (18, 78, 98) from the coal raw material (13) from which the magnetic material (13c) has been removed.
A second sieve (12) for classifying a coal raw material (13) having a smaller particle size of 5 to 0.5 mm; a coal raw material classified by the second sieve (12); And an electromagnetic induction selector (19) for the dry coal separation apparatus according to claim 8, wherein the coal feed (13b) is classified by the second sieve (12) and conveyed to the electromagnetic induction selector (19). ) A coal feed (13) having a particle size of 2 mm or less or 2 to 0.05 mm, which is smaller than the above, is separated from each other into the carbonaceous matter (13a) and the impurities (13b).
0. A dry coal separation apparatus comprising: the electrostatic selector (20, 100) of the dry coal separation apparatus according to 0. 13. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17,121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
Coal raw material having a particle size of 5 mm or less or 15 to 0.05 mm (1
3) a first sieve (11) for classifying the coal raw material (13) classified by the first sieve (11), wherein the carbonaceous content (13a) is partially mixed with the carbonaceous content (13a). The electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, which separates the impurities (13b) from the impurities (13b). Impurities (1
3b) and an ultrasonic selector (18, 78, 98) of the dry coal separation apparatus according to claim 9, and a part of the carbonaceous material (13a) separated by the ultrasonic selector (18, 78, 98). ) Mixed impurities (13b) to the carbonaceous matter (13a)
11. A dry coal separation apparatus comprising: the electrostatic selector (20, 100) of the dry coal separation apparatus according to claim 10, wherein the electrostatic selector (20, 100) is separated into the impurity and the impurities (13b). A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
mm or less, or a first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.05 mm, and the coal raw material (13) classified by the first sieve (11) is subjected to the carbonaceous fraction (13a ) And the impurities (13b) in which the carbonaceous matter (13a) is partially mixed are separated from each other by the ultrasonic selector (18, 78, 98) of the dry coal separation apparatus according to claim 9, (13a) mixed with the carbonaceous content (13a) and partially mixed with the carbonaceous content (13a).
The electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, wherein the carbonaceous material (13a) is partially mixed with the impurity (13b) separated by the electromagnetic induction selector (19). 11. A dry coal separation apparatus, comprising: the electrostatic selector (20, 100) of the dry coal separation apparatus according to claim 10, which separates the carbonaceous matter (13a) and the impurities (13b) from each other. A drying device (14a to 14c) for drying a coal material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
A first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.5 mm, and a coal raw material (13) classified by the first sieve (11), An electromagnetic induction selector (19) for a dry coal separation apparatus according to claim 8, wherein the electromagnetic induction selector (19) is separated from impurities (13b), and the electromagnetic induction selector (19) is selected from coal raw materials (13) from which the magnetic material (13c) has been removed. ), A second sieve (12) for classifying the coal raw material (13) having a particle size of 5 to 0.063 mm smaller than the coal raw material (13), and a coal raw material classified by the second sieve (12). The ultrasonic selector (18, 78, 98) for a dry coal separation apparatus according to claim 9, wherein (13) separates the carbonaceous matter (13a) and the impurities (13b) from each other.
And a dry coal separation apparatus. A drying device (14a-14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a pulverizing device (14) for pulverizing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
First classifier for classifying coal feedstock (13) with a particle size of ~ 0.063 mm
10. The super-coal of a dry coal separation apparatus according to claim 9, wherein the coal raw material (13) classified by the sieve (11) and the first sieve (11) is separated from each other into the carbonaceous matter (13a) and the impurities (13b). Sound wave selector (18,78,98)
From the coal raw material (13) from which the magnetic material (13c) has been removed, the coal raw material (13) transported to the ultrasonic selector (18, 78, 98)
A second sieve (12) for classifying a coal raw material (13) having a smaller particle size of 5 to 0.5 mm, and a coal raw material (13) classified by the second sieve (12). A dry coal separation apparatus, comprising: the electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, wherein the electromagnetic induction selector (19) is separated into the impurities and the impurities (13b). 17. A drying device (14a to 14c) for drying a coal material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
A first sieve (12) for classifying a coal raw material (13) having a particle size of 5 to 0.5 mm; and a coal raw material (13) classified by the first sieve (11), The electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, which is separated into impurities and impurities (13b); and a coal raw material classified by the first sieve (12) and conveyed to the electromagnetic induction selector (19). 13) Separating a coal raw material (13) having a particle size of 2 mm or less or 2 to 0.05 mm, which is smaller, into the carbonaceous matter (13a) and the impurities (13b).
0. A dry coal separation apparatus comprising: the electrostatic selector (20, 100) of the dry coal separation apparatus according to 0. 18. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
First classifier for classifying coal feedstock (13) with a particle size of ~ 0.063 mm
10. The super-coal of a dry coal separation apparatus according to claim 9, wherein the coal raw material (13) classified by the sieve (11) and the first sieve (11) is separated from each other into the carbonaceous matter (13a) and the impurities (13b). Sound wave selector (18,78,98)
And the ultrasonic selector classified by the first sieve (11).
2mm smaller than the coal feed (13) transported to (18,78,98)
An electrostatic selector (20, 100) for a dry coal separation apparatus according to claim 10, wherein the coal raw material (13) having a particle size of 2 to 0.05 mm or less is separated from the coal material (13a) and the impurities (13b). A dry coal preparation apparatus, comprising: 19. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17,121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
A first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.063 mm; and a coal raw material (13) classified by the first sieve (11) are combined with the carbonaceous material (13a). The electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, wherein the carbonaceous matter (13a) is separated into the impurities (13b) in which the carbonaceous matter (13a) is mixed, and the carbonaceous matter (13a) is mixed in the part. An ultrasonic selector (18, 78, 98) for a dry coal separation apparatus according to claim 9, wherein the impurity (13b) is separated from the carbonaceous matter (13a) and the impurity (13b) from each other. Dry coal preparation equipment. 20. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17,121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
First classifier for classifying coal feedstock (13) with a particle size of ~ 0.063 mm
A sieve (11), and the coal raw material (13) classified by the first sieve (11) into the carbonaceous matter (13a) and the impurity (13b) in which the carbonaceous matter (13a) is partially mixed. The ultrasonic selector (18, 78, 98) of the dry coal separation apparatus according to claim 9, wherein the impurities (13b) in which the carbonaceous matter (13a) is mixed in a part thereof are mixed with the carbonaceous matter (13a) and the impurities ( 13b) and the electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, which is separated from each other. 21. A drying device (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a crushing device for crushing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 1 out of the removed coal raw materials (13)
Coal raw material having a particle size of 5 mm or less or 15 to 0.05 mm (1
3) a first sieve (12) for classifying, and a coal raw material (13) classified by the first sieve (12), wherein the carbonaceous content (13a) is partially mixed with the carbonaceous content (13a). (13b) and the electromagnetic induction selector (19) of the dry coal separation apparatus according to claim 8, wherein the carbonaceous material (13a) is mixed with the carbonaceous material (13a), and 11. A dry coal separation apparatus comprising the electrostatic selector (20, 100) of the dry coal separation apparatus according to claim 10, which is separated from impurities and impurities (13b). 22. A drying apparatus (14a to 14c) for drying a coal raw material (13) in which a carbonaceous component (13a) and an impurity (13b) are mixed, and a pulverizing apparatus (14) for pulverizing the dried coal raw material (13) 16) and a magnetic material removing device (17, 121) for removing the magnetic material (13c) in the impurities (13b) of the pulverized coal raw material (13), wherein the magnetic material (13c) is 5 out of the removed coal raw materials (13)
mm or less, or a first sieve (11) for classifying a coal raw material (13) having a particle size of 5 to 0.05 mm, and the coal raw material (13) classified by the first sieve (11) is subjected to the carbonaceous fraction (13a ) And the impurities (13b) in which the carbonaceous matter (13a) is partially mixed are separated from each other by the ultrasonic selector (18, 78, 98) of the dry coal separation apparatus according to claim 9, And an electrostatic selector (20, 100) for a dry coal separation apparatus according to claim 10, which separates the impurities (13b) in which the impurities (13a) are mixed into the carbonaceous matter (13a) and the impurities (13b). Features a dry coal preparation equipment.