JP3568649B2 - Sand production system and method of operating the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sand manufacturing system for manufacturing a sand from ore, in particular, to a method of operating the new sand production system and it utilizes the water.
[0002]
[Prior art]
Conventionally, dry and wet sand production methods are known. Conventional dry sand production systems use a crusher to break the ore. A conventional crusher has a fixed blade and a movable blade opposed thereto, and crushes and sands a rough stone dropped into a gap between the fixed blade and the movable blade. Such a dry crusher can be operated under the condition that the water content of the ore to be charged is, for example, about 2% or less. In addition, sand production cannot be performed basically on rough stones mixed with mud.
[0003]
In the wet sand production system, rough stones, water, and metal strips called a rod mill are put together in a container, and the rough stone is crushed by rotating the container.
[0004]
[Problems to be solved by the invention]
In the above-mentioned dry method, in the rainy season and other times when long rains occur, if the water content of the rough stones input to the crusher becomes high, sand in the crusher becomes a lumpy dumpling state and clogs between the blades, When it solidified, there was a problem that the crusher could not be operated. Further, under such conditions, there is a problem that the filter of the sieving mechanism provided at the subsequent stage of the crusher is clogged. In addition, this filter is for removing stones (other than sand) having a predetermined diameter or more, and then putting them back into the crusher. Such a problem is liable to occur even when mud is mixed in the rough, and when mud is mixed in the manufactured sand, there is a problem that the sand cannot be used as concrete sand. On the other hand, the wet method has a very low efficiency in principle and lacks practicality.
[0005]
The present invention has been made in view of the above-described conventional problems, and has as its object to operate a system to which a new sand production method that enables a crusher to operate properly irrespective of the water content of a rough stone and to operate the system . It is to provide a method .
[0006]
Another object of the present invention is to provide a system capable of producing high-quality sand even when mud is mixed in a rough stone, and a method of operating the system.
[0007]
It is another object of the present invention to provide a system capable of preventing clogging of a crusher or a filter and a method of operating the same.
[0008]
Another object of the present invention is to provide a system that saves resources based on recycling and a method for operating the system.
[0009]
It is another object of the present invention to provide a system capable of switching between a new mixed-water operation (washing operation) and a conventional dry operation according to various conditions, and a method of operating the same.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a crusher for crushing an ore, an ore input mechanism for inputting an ore to the crusher, a water injection mechanism for pouring water along with an ore input to the crusher, It is characterized by including a separation device for separating and extracting sand from the produced sand flow, and a mode selection device for selecting a dry operation mode and a mixed water operation mode .
[0011]
According to the above configuration, water injection is performed at the same time as the injection of the rough, and the crusher crushes such a rough stone. Therefore, it is possible to effectively prevent the crushed pieces from clumping in a dumpling shape, and even if mud is mixed in the rough, the mud can be washed away, so that clogging can also be prevented on that surface. In addition, since not the sand but the flow of the flowing sandy water flows through the filter of the sieving mechanism provided at the latter stage of the crusher, clogging hardly occurs there. When mud is mixed in the ore, the mud is finally taken out into wastewater by a separation device, and high-quality sand from which mud has been removed is extracted. That is, as a result, washed high-quality sand can be obtained.
[0012]
In a preferred aspect of the present invention, the apparatus further includes a water treatment facility for purifying water separated by the separation device in order to recycle the water, wherein the purified water is re-injected into the crusher. . As a result, it is possible to achieve effective utilization of resources and reduction of system operating costs by circulating water, which is a valuable resource.
[0013]
Further, in a preferred aspect of the present invention, there is provided a sieve mechanism provided with a filter for removing stones having a predetermined diameter or more from the sand flow, and a washing mechanism for injecting water into the filter. Thus, in the present invention, since the sand flow flows through the filter, the filter is less likely to be clogged than in the related art. However, clogging can be almost completely prevented by performing washing by pouring water. Preferably, the water injection mechanism is a mechanism for pouring water into an inlet of the crusher.
[0014]
As described above, in the present invention, contrary to the conventional concept, the various advantages as described above can be enjoyed by actively mixing water into the rough stone.
[0015]
In a preferred aspect of the present invention, the method includes a mode selection device for selecting a dry operation mode and a mixed water operation mode, and in the dry operation mode, only rough stones are put into the crusher device to perform sand production, In the mixed water operation mode, sand is produced by putting both rough stone and water into the crusher device. In other words, the sand production capacity of the crusher is considered to be basically higher when no water is injected (dry operation), so under favorable conditions where the mixing ratio of mud is extremely low and the water content is low, A dry operation similar to the conventional one is performed. Of course, in other cases, high-quality sand is manufactured while performing the mixed-water operation (operation by water injection) to prevent the above-described problem. The present invention has an advantage that the operation mode can be basically switched depending on whether or not water is injected, and two manufacturing methods can be selectively realized with one basic facility. As a result, appropriate operation according to the climate can be realized, and the system can be operated continuously throughout the year.
The method according to the present invention comprises a crusher for crushing a rough stone, a rough stone input mechanism for charging the rough stone to the crusher, a water injection mechanism for pouring water in accordance with the rough stone input to the crusher, and a sand flow from the sand flow from the crusher. In a sand production system including: a dry operation mode or a mixed water operation mode as an operation mode of the sand production system, and in the dry operation mode, the operation of the water injection mechanism is stopped. Sand production is performed only by charging the ore into the crusher device, and in the mixed water operation mode, the water injection mechanism is operated to put the rough and water together into the crusher device to perform sand production, and the crushed stone contains water. The operation mode of the sand production system is selected according to the mixing ratio and the mixing ratio of mud.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows a preferred embodiment of a sand production system according to the present invention, and FIG. 1 is an overall configuration diagram of the system.
[0018]
In FIG. 1, a crusher 10 crushes a rough stone fed by a rough stone feeding mechanism 12 constituted by a belt conveyor or the like to generate sand, and its structure is shown in FIG. Water is injected into the crusher 10 by the water injection mechanism 14 when the ore is charged. That is, the ore and water are put into the crusher 10 together, and the ore is crushed in a mixed water state.
[0019]
FIG. 2 conceptually shows the internal structure of the crusher 10. The ore carried by a belt conveyor or the like constituting the ore introduction mechanism 12 shown in FIG. 1 is sequentially introduced into the upper inlet 16. At the same time, water is injected by the water injection mechanism 14 shown in FIG. Specifically, a plurality of water injection pipes 19 are guided to the upper part of the inlet 16, and water is injected through the water injection pipes 19. Of course, a mechanism such as a so-called sprinkler may be provided above the inlet 16 in order to uniformly inject water. In the present embodiment, the input ratio (weight ratio) of the rough and the water is, for example, 1 for the rough 3. This ratio is desirably set as appropriate depending on the size of the rough stone, the structure of the crusher, and the like.
[0020]
An umbrella-shaped movable blade 20 supported by a shaft 18 is provided in the main body of the crusher 10. On the other hand, a ring-shaped fixed blade 22 is provided to face the movable blade 20. The gap between the movable blade 20 and the fixed blade 22 is gradually narrowed from the upper side to the lower side, and the ore is dropped into the gap. With the vibration of the movable blade 20, the ore is crushed between the two blades, and sand is removed. Generated. In addition, sand can be efficiently manufactured by periodically eccentricizing the center of the movable blade 20. The movable blade 20 and the fixed blade 22 are made of, for example, a hard metal, and are replaced when wear occurs. The shaft 18 is vibrated by the drive 24 and the weight rotated by the drive.
[0021]
In the present embodiment, water is injected together with the introduction of the rough, and the crushed pieces are prevented from forming a dumpling between the movable blade 20 and the fixed blade 22 to be hardened, and mud is mixed into the rough. This can also prevent clogging. Note that the crusher 10 is not limited to the one shown in FIG. 2 and various crushers can be applied as long as the device crushes the rough by applying pressure.
[0022]
Returning to FIG. 1, the water-mixed sand discharged from the crusher 10, that is, the sand flow, is introduced into a sieving mechanism 26 provided at the subsequent stage of the crusher 10. The sieving mechanism 26 has a built-in filter 28 as a screen, and a sand flow is poured into the filter 28. The filter 28 is formed of a porous member, and removes sand having a certain diameter or more, for example, rough sand (stone) having a diameter of 2.5 mm or more. The removed rough sand is conveyed by a belt conveyor or the like and is again put into the crusher 10. In FIG. 1, the return path is indicated by 100. A vibration mechanism (not shown) is connected to the filter 28, and the filter 28 is vibrated by the vibration mechanism.
[0023]
In the present embodiment, a washing mechanism 30 is provided to inject water into the sieving mechanism 26. That is, in addition to the sand flow, water is further injected into the filter 28 by the cleaning mechanism 30, and clogging of the filter 28 is almost completely prevented. Of course, if the proportion of water in the sand flow is large and it is not necessary to separately inject water, it is not necessary to provide such a washing mechanism 30. However, by providing such a cleaning mechanism 30, periodic cleaning can be omitted.
[0024]
The sand flow that has passed through the sieving mechanism 28 is then introduced into a sand / water separator 32, where sand and water are separated. Of course, the mud mixed with the rough is contained in the wastewater and separated from the sand. The sand / water separator 32 is composed of, for example, a finer filter or the like. The separated sand is transported to a predetermined storage facility by a belt conveyor. Prior to this, the sand may be dried via a drying facility.
[0025]
On the other hand, the wastewater discharged from the sand / water separator 32 is sent to a water treatment facility 34, where a purification treatment is performed. That is, the water treatment facility 34 purifies wastewater as purified water by using a process such as precipitation or filtering. The purified water is recycled and used again, and more specifically, sent to the water injection pump 36 of the water injection mechanism 14 and the cleaning pump 38 of the cleaning mechanism 30 respectively. The water return path is shown at 102 in FIG. The water injection mechanism 14 is composed of a water injection pump 36 and a distributor 39 for distributing the water discharged from the water pump 36 to a plurality. The distributor 39 is connected to a plurality of water injection pipes 19, and the outlet side of the crusher 10 It is led to the inlet 16. The cleaning mechanism 30 includes a cleaning pump 38, a water injection pipe 40, and the like.
[0026]
The water injection pump 36 and the washing pump 38 can be constituted by a single pump. In this case, a branch point is provided at the subsequent stage of the pump, and a valve is arranged in each branch to adjust the flow rate. Good. In addition, such a pump can be provided in the water treatment facility 34.
[0027]
By the above-mentioned water recycling circulation, effective utilization of resources and reduction of the operating cost of the system can be achieved at the same time.
[0028]
The system shown in FIG. 1 can be operated in a conventional dry operation mode in addition to the mixed operation mode described above. That is, if the operation of those modes is stopped by a mode change switch (not shown), specifically, a switch for stopping the water injection mechanism 14 and the cleaning mechanism 30, a dry operation can be realized as in the conventional case. . In the dry operation mode, the operation efficiency is higher than in the mixed water operation mode, so when the water content of the rough is low or when the mud mixed into the rough is extremely small, sand production with high efficiency in such a dry operation mode is performed. It is desirable to do. On the other hand, when the water content of the gem or the mixing ratio of the mud is large, the operation is performed in the above-described mixed water operation mode, and high quality sand is produced while preventing clogging in the crusher 10 and clogging of the filter 28. be able to. Therefore, an appropriate mode may be selected according to various conditions such as climate. In the dry operation mode, the water injection mechanism 14 is stopped, but the cleaning mechanism 30 may be operated as it is. That is, when it is expected that clogging occurs in the filter 28, the cleaning mechanism 30 is operated to inject water into the filter 28, and at the same time, the sand / water separator 32 is operated to perform the same operation as described above. Driving. According to such an operation, there is an advantage that clogging of the filter 28 can be prevented while being of a dry type. Of course, when the dry operation is performed in a state where both the water injection mechanism 14 and the cleaning mechanism 30 are stopped, the sand flowing out of the filter 28 is transported as it is on the belt conveyor, that is, the sand / water separator 32 is used. May be bypassed.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a system capable of effectively preventing clogging in a crusher and clogging of a filter and producing good-quality sand, and a method for operating the system. Further, according to the present invention, the cost of the work to recycle water resource saving and systems can be realized. Further, according to the present invention, efficient sand production can be performed by switching operation modes according to various conditions such as climatic conditions.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a system according to the present invention.
FIG. 2 is a view conceptually showing the internal structure of a crusher.
[Explanation of symbols]
10 crusher, 12 ore feeding mechanism, 14 water injection mechanism, 26 sieve mechanism, 32 sand / water separator, 34 water treatment equipment.

Claims (5)

A crusher to break the rough,
A rough stone input mechanism for charging a rough stone to the crusher,
A water injection mechanism that pours water along with the ore input to the crusher,
A separation device that separates and extracts sand from a sand stream flowing out of the crusher,
A mode selection device for selecting a dry operation mode and a mixed water operation mode,
Only including,
In the dry operation mode, sand production is performed by supplying only rough stone to the crusher device,
In the mixed water operation mode, sand is produced by putting both rough stone and water into the crusher device,
A sand production system characterized in that an operation mode can be switched . The system according to claim 1,
Further, in order to recycle the water, a sand production system comprising a water treatment facility for purifying water separated by the separation device, wherein the purified water is re-injected into the crusher. . The system according to claim 1,
A sieve mechanism provided with a filter for removing stones having a predetermined diameter or more from the sand flow,
A washing mechanism for injecting water into the filter,
A sand production system comprising: The system according to claim 1,
The sand production system, wherein the water injection mechanism is a mechanism for pouring water into an inlet of the crusher. A crusher to break the rough,
A rough stone input mechanism for charging a rough stone to the crusher,
A water injection mechanism that pours water with the ore input to the crusher,
A separation device that separates and extracts sand from a sand stream flowing out of the crusher,
In a sand production system including
Select a dry operation mode or a mixed water operation mode as the operation mode of the sand production system,
In the dry operation mode, sand production is performed by stopping the operation of the water injection mechanism and charging only rough stone to the crusher device,
In the mixed water operation mode, sand is produced by operating the water injection mechanism to put both rough stone and water into the crusher device,
A method for operating a sand production system, wherein an operation mode of the sand production system is selected according to a water content of a rough stone and a mixing ratio of mud.

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