CN205288668U - Coarse slime sorting machine - Google Patents

Abstract

The utility model relates to a colliery is with coal washing coal dressing equipment, specifically for a coarse slime sorting machine who is used for 13 coking coal of washing, including the cylindricality cell body, the top edge of cylindricality cell body sets up the overflow launder, the overflow launder links up the overflow mouth, the top installation pan feeding well of cylindricality cell body, installation pneumatic actuator control feeding in the pan feeding well, it is covered with the turbulent board that punches a hole to set up one bottom in the cylindricality cell body, cylindricality cell body bottom is located turbulent board below and sets up the ascending current mouth of pipe and installation underflow blow -down valve, two installations are used for the pressure differential density probe of the actual separating density in test bed layer in the cylindricality cell body, pressure differential density probe transmission signal to PID controller, pneumatic actuator and underflow blow -down valve are controlled by the PID controller. The utility model relates to a rationally, coarse slime sorting machine other coarse coal mud sorting facilities that compares, control separating density that can be more accurate, it is higher to select separately the precision.

Description

Separation of coarse slime machine

Technical field

This utility model relates to colliery coal washing cleaning unit, is specially and a kind of is applied to wash the separator of coal slime in raw coal.

Background technology

Datong Coal Mine Group (hereinafter referred to as Datong Coal Group Company) is positioned at the northeast side of same Xin's mine industrial sites with Xin coal preparation plant, enters to wash raw coal and all is from same Xin's mine. It is mine type coal preparation plant with Xin coal preparation plant, for coordinating the thinking of development of Datong Coal Group Company exploitation new product, develop the correlation report of 1/3 coking coal product about same Xin according to Datong Coal Group Company ature of coal center, it is 1/3 coking coal with Xin's grade of coal, for improving the economic worth with Xin's coal resources, can as coke making and coal blending after dressing of coal by washing with Xin 1/3 coking coal, it is greatly increased the added value of same Xin's raw coal, economic benefit is greatly improved, and therefore, newly-increased 6,000,000 tons of washing systems are designed by 1/3 coking coal.

Owing to lacking of capital, coal cleaning percent little, to reasons such as cleans ash are less demanding, China is originally inadequate to the attention degree of separation of coarse slime, and most of coal preparation plants are directly mixed head coal product and sell. Along with the development of coal separation industry and user are to improving constantly that ash of commercial coal requires, major part coarse slime can not be directly incorporated into cleaned coal and can only mix middle coal, affect yield, reduction economic benefit; Raising along with mechanical coal mining degree, enter the coal slurry content washing in raw coal to increase gradually, the problem solving separation of coarse slime is more urgent, for Coal Preparation Plant, especially can according to ature of coal situation, conservative control coarse grain slime recovery situation, sub-elect low ash extract coal, ensure quality of commercial coal, it is ensured that the response rate.

The screening installation of the coarse slime that current China is conventional mainly has Slime dense medium cyclone, hydrocyclone, coal slime settling interference bed and spiral etc.

1, Slime dense medium cyclone

When adopting predictive desliming to have two section of two product dual medium cyclone dressing technique of pressure, the Dense-medium system of Slime dense medium cyclone must be separately provided, and minor diameter Slime dense medium cyclone is very strict to the granularity requirements of medium, the magnetite powder of regular particle size is it is difficult to ensure that technological effect need to adopt super-fine magnetite powder, this type of medium is more difficult purchase commercially, and expensive. And coal preparation plant self increases medium grinding system, investment and operating cost can be increased again, and the recycling of ultra-fine dense media is also very difficult. Slime dense medium cyclone is used without pressure No severing mud dense medium cyclone combination by some enterprise domestic with major diameter, fine coal properties system can not be separately provided, system simplifies, but actual separating effect is poor, there is the more difficult control of separating density, magnetic iron powder classification and concentration in coal slime swirler, be situated between the problems such as consumption is high.

2, hydrocyclone

Water-only cyclone is adopted and is used water as medium, without the consumption that is situated between, and applicable low-density sorting, but sharpness of separation relatively Slime dense medium cyclone and TSS coal slurry separator are low, it usually needs and wash sorting again or use raising sharpness of separation with spiral combination.

3, spiral

Spiral is dependent on the separation of coarse slime equipment that gravity carries out sorting, non-power consumption own, it is adaptable to the material sorting that high density, size fraction ranges are wide. For ensureing that 1/3 coking coal ash is below 10%, should control at about 1.6g/cm3 with Xin coal preparation plant separation of coarse slime density, and spiral sharpness of separation is relatively low, be not suitable for for washing 1/3 coking coal.

4, coarse slime interference bed separator

Coal slime hindered falling bed is that grew up in recent years a kind of relies on rising voltage stabilizing current to carry out the equipment sorted, and this equipment is suitable for low-density sorting, and sharpness of separation is higher. Its separating effect is directly related with grain graininess size and scope, and when material bound ratio is during for 4:1, equipment can present the operational effect of the best, it is proposed that pan feeding is limited to 1-0.25mm or 0.5-0.15mm up and down. There is the coal slime hindered falling bed of various ways at present, such as TSS, TBS, RC, Crossflow etc.

Summary of the invention

This utility model is not suitable for the problem for washing 1/3 coking coal for the screening installation solving existing coarse slime, it is provided that a kind of separation of coarse slime machine for washing 1/3 coking coal.

This utility model adopts the following technical scheme that realization:

A kind of separation of coarse slime machine, including cylindricality cell body, the top of described cylindricality cell body arranges overflow launder, described overflow launder linking overfall; Pan feeding well is installed at the top of described cylindricality cell body, installs pneumatic actuator and control charging in described pan feeding well; In described cylindrical groove body, bottom arranges a turbulence plate being covered with punching, is positioned at below turbulence plate and offers the ascending current mouth of pipe and install underflow discharge valve bottom described cylindricality cell body; Installing two pressure reduction density probes for detecting bed practical separation density in described cylindrical groove body, described pressure reduction density probe transmission signal is to PID controller, and described pneumatic actuator and underflow discharge valve are by PID controller control.

Water is fed by bottom by predetermined pressure and flow velocity, enters interference bed operating room through turbulence plate, forms ascending current. Concentration be 40% ~ 60% ore pulp tangentially feed pan feeding well backward under scatter, meet with ascending current, formed interference bed or claim boiling bed. When system reaches steady statue, due to the difference of grain density in pan feeding, density floats lower than the granule of interference bed average density, enters overflow launder, is flowed out by overfall; The granule bigger than interference bed average density just penetrates bed and enters underflow, PID controller the ball valve automatically controlled is discharged. For accurately pan feeding being sorted, bed density must keep seriality, and bed density is controlled by controlling system, including: density is popped one's head in, pneumatic actuator etc. By the practical separation density of two pressure reduction density probe detection beds, sending a current signal according to the size of density to PID controller, bed actual density value and setting value are compared by PID controller, thus controlling the unlatching of underflow blow-off valve.

Table 1 separation of coarse slime machine separating effect summary sheet

From table 1: the clean coal yield of this equipment fine coal is 50.27%, and coarse slime accounts for and washes raw coal ratio with about 13%, can go out 1/3 coking coal 600 �� 13% �� 50.27%=39.21 ten thousand tons every year with Xin's coal separation two factory. With 1/3 coking coal per ton expensive 200 yuan of calculating than thermal coal, economic benefit 39.21 �� 20,0=7,842 ten thousand yuan can be increased every year.

Debug so far with Xin's coal separation two factory, TSS separation of coarse slime machine is accumulative to be run more than 3000 hour, when pan feeding ash is 22-24%, cleans ash can be controlled within 10%, E value is between 0.05-0.11, I value, between 0.12-0.19, produces a desired effect, and meets the requirement 1/3 coking coal.

Above-mentioned coal slurry separator is as a kind of Novel thick slime separation equipment, at present also in the popularization and application stage, this is in same Xin's coal separation two factory successful Application, start Datong Coal Group Company 1/3 coking coal coal preparation plant and used the precedent of hindered bed separator fine coal, all there have been good reference in other coal preparation plants of Datong Coal Group Company and the similar coal preparation plant of other atures of coal in all parts of the country.

Compared with prior art, this separation of coarse slime machine has the advantage that

(1) to pan feeding coal varitation strong adaptability, sharpness of separation is high.

(2) automaticity is high, and separating density is completely adjustable (1.4-1.9g/L), and at central station of floating dock, separating density can be monitored.

(3) without complicated pan feeding distribution system, it is not necessary to dense media and chemical agent.

(4) compact to design, take up room little, circular cell body design, it is ensured that the uniformity of overflow.

(5) not having power consumption, equipment maintenance cost is low, and easily mill area equipment is ceramic-lined, and service life is up to 15-20.

This utility model is reasonable in design, and separation of coarse slime machine is compared other separation of coarse slime equipment, it is possible to controlling separating density more accurately, sharpness of separation is higher; Automaticity is high, it is not necessary to special messenger nurses; Coal Preparation Plant and coking coal coal washery is all applicable, it is possible to bring bigger economic benefit to enterprise; The demand for development that coal separation industry is following is more conformed to than other separation of coarse slime equipment.

Accompanying drawing explanation

Fig. 1 represents structural representation of the present utility model.

In figure, 1-cylindricality cell body, 2-overflow launder, 3-pan feeding well, 4-pneumatic actuator, 5-PID controller, 6-overfall, 7-pressure reduction density is popped one's head in, 8-turbulence plate, the 9-ascending current mouth of pipe, 10-underflow discharge valve, 11-wash water distributor chamber.

Detailed description of the invention

Below in conjunction with accompanying drawing, specific embodiment of the utility model is described in detail.

A kind of separation of coarse slime machine, as it is shown in figure 1, include cylindricality cell body 1, the top of described cylindricality cell body 1 arranges overflow launder 2, and described overflow launder 2 is connected overfall 6; Pan feeding well 3 is installed at the top of described cylindricality cell body 1, and pan feeding well 3 arranges feeding mouth, discharging opening. In described pan feeding well 3, pneumatic actuator 4 is installed and controls charging; Described cylindricality cell body 1 inner bottom part arranges a turbulence plate 8 being covered with punching, is positioned at below turbulence plate 8 and offers the ascending current mouth of pipe 9 and install underflow discharge valve 10 bottom described cylindricality cell body 1; Installing two pressure reduction density probes 7 for detecting bed practical separation density in described cylindricality cell body 1, described pressure reduction density probe 7 transmission signal is to PID controller 5, and described pneumatic actuator 4 and underflow discharge valve 10 control by PID controller 5.

Above-mentioned separation of coarse slime machine is a kind of hindered falling equipment utilizing ascending current to produce turbulent flow in cell body. Main part is a simple cylindricality cell body, and top is provided with overflow launder, has a turbulence plate being covered with punching bottom cell body. Water is fed by bottom by predetermined pressure and flow velocity, enters interference bed operating room through turbulence plate, forms ascending current. Concentration be 40% ~ 60% ore pulp tangentially feed pan feeding well backward under scatter, meet with ascending current, formed interference bed or claim boiling bed. When system reaches steady statue, due to the difference of grain density in pan feeding, density floats lower than the granule of interference bed average density, enters overflow launder, is flowed out by overfall; The granule bigger than interference bed average density just penetrates bed and enters underflow, PID controller the ball valve automatically controlled is discharged.For accurately pan feeding being sorted, bed density must keep seriality, and bed density is controlled by controlling system, including: density probe, pneumatic actuator and main building PLC. Practical separation density by two pressure reduction density probe detection beds, size according to density sends the current signal of a 4 ~ 20mA to PID controller, bed actual density value and setting value are compared by PID controller, thus controlling the unlatching of underflow blow-off valve, pneumatic actuator can in the range of linearity of 60mm freely, be smoothly moved.

The clean coal yield of the said equipment fine coal is 50.27%, and coarse slime accounts for and washes raw coal ratio with about 13%, can go out 1/3 coking coal 600 �� 13% �� 50.27%=39.21 ten thousand tons every year with Xin's coal separation two factory. With 1/3 coking coal per ton expensive 200 yuan of calculating than thermal coal, economic benefit 39.21 �� 20,0=7,842 ten thousand yuan can be increased every year.

This separation of coarse slime machine is as a kind of Novel thick slime separation equipment, at present also in the popularization and application stage, in same Xin's coal separation two factory successful Application, start Datong Coal Group Company 1/3 coking coal coal preparation plant and used the precedent of hindered bed separator fine coal, all there have been good reference in other coal preparation plants of Datong Coal Group Company and the similar coal preparation plant of other atures of coal in all parts of the country.

Finally it should be noted that; above example is only in order to illustrate the technical solution of the utility model and unrestricted; although being described in detail with reference to this utility model embodiment; it will be understood by those within the art that; the technical solution of the utility model is modified or equivalent replacement; without departure from the spirit and scope of the technical solution of the utility model, it all should be contained in claims of the present utility model.

Claims (1)

1. a separation of coarse slime machine, it is characterised in that: including cylindricality cell body (1), the top of described cylindricality cell body (1) arranges overflow launder (2), described overflow launder (2) linking overfall (6); Pan feeding well (3) is installed at the top of described cylindricality cell body (1), installs pneumatic actuator (4) and control charging in described pan feeding well (3); Described cylindricality cell body (1) inner bottom part arranges a turbulence plate (8) being covered with punching, and described cylindricality cell body (1) bottom is positioned at turbulence plate (8) lower section and offers the ascending current mouth of pipe (9) and install underflow discharge valve (10); Two pressure reduction density probe (7) for detecting bed practical separation density are installed in described cylindricality cell body (1), described pressure reduction density probe (7) transmission signal controls to PID controller (5), described pneumatic actuator (4) and underflow discharge valve (10) by PID controller (4).