Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant
The utility model is related to a kind of slime separation classification technique, especially a kind of liquid-solid fluid bed coarse slime of desliming type point
Select overflow cleaned coal grading plant.
The technique that most of existing coal preparation technique is combined with flotation using stepless gravity treatment, no matter it is selected before take off or not
The sorting size limit of desliming, gravity treatment and flotation is 0.5mm, actually due to two kinds of method for separating itself the characteristics of cause
Coal grain separating effect near 0.5mm is poor, and this part coal grain（Refer generally to 3-0.25mm）National standard（GB/T 7186-1998）
It is defined as coarse slime.This partial particulate is typically individually reclaimed in coal preparation plant by high-frequency screen, its ash content between cleaned coal and middle coal it
Between, 2-5% typically higher than cleans ash, its final whereabouts is difficult to confirm.It is not sorted typically at present, majority mixes its part
Enter cleaned coal, coal in another part incorporation.Development and the demand of society with the epoch, ash of the current coal market to coal product
Divide and require more and more stricter, there are a small number of coal preparation plants to enter using minor diameter dense medium cyclone or spiral to coarse slime in recent years
Row sorting, but the deficiency due to both devices in itself, it is impossible to reach satisfied effect.Minor diameter heavy medium cyclone is not
Foot：Too thin to medium requirements, medium prepares and reclaimed difficult and cost height；Pressure is high to be required to pan feeding, equipment attrition is tight
Weight, power consumption is big；Although it is sorted, granularity lower limit is relatively low, and thinner stock grading efficiency is low, and a part is not passed through
The thin mud of sorting enters cleaned coal, cleans ash is influenceed, while it can not replace flotation completely.Spiral is not enough：Sorting
Density is high, and cleaned coal can not reach the cleans ash finally required, and its product cannot function as final products sale；Separate unit treating capacity
Small, it is necessary to which many use cooperatively, floor space is big, and height is big, while needing to adjust oar and distributor, distributing uniformity is difficult to control
System；It is strict to feed thickness requirement, it is difficult to control in industrial production.
In the prior art, the fluidization technology on chemical industry is incorporated into Concentrating Field, achieves good effect.China
Utility model patent（The patent No.：ZL200720037745.0）A kind of liquid-solid fluid bed coarse slime size classification grading device is disclosed,
The device can reduce coarse slime ash content again by the use of coarse slime itself as medium.Utilize its sedimentation during narrow grade material hindered falling
Main this relation relevant with the density of particle of speed, makes material be sorted in the fluidizing agent itself constituted.
Used using classification eddy flow before pan feeding and after selecting in the desliming devices such as cyclone, high-frequency screen and coal slime centrifuge, final cleaned coal
There are still the high grey thin mud of a part, cause high ash thin mud in pan feeding seriously polluted to cleaned coal, influence separation results.
Utility model content
Technical problem to be solved in the utility model is, overcoming the defect that prior art is present, there is provided a kind of desliming
Type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant, by coarse slime overflow product in liquid-solid fluid bed coarse slime size
Machine overflow outlet carries out sedimentation desliming, the grey thin mud pollution of the height in reduction liquid-solid fluid bed coarse slime size machine overflow, so that real
Now reduce total cleans ash, improve product quality and coal resources comprehensive utilization ratio.
Desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant of the present utility model, including sorting classifying bucket
Body, fluid distributor and overflow desliming device.
The sorting classifying staving is made up of staving and base cone, base cone it is suitable for reading with staving under mouth airtight connection, mouth under base cone
Set by mine tailing valve, base cone Xia Kou sides provided with the bypass pipe controlled by draw valve.Staving top is provided with pan feeding sleeve（Feeding mouth）,
Feeding pipe is enclosed in pan feeding sleeve.
The overflow desliming device, is made up of addendum cone, oblique staving, and the sectional area suitable for reading of oblique staving is more than lower mouth sectional area,
Oblique staving surrounding suitable for reading sets overflow launder, and isopipe root sets overflow pipe.Addendum cone is suitable for reading to be connected on below the side of oblique staving, and oblique
Staving seal joining, the lower mouth of addendum cone sets coarse-fine coal blow-off valve.
The fluid distributor is arranged at the staving bottom of sorting classifying staving, and fluid distributor joins with staving outer connecting pipe
It is logical.
The utility model desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant, its course of work is as follows：
Material, even into pan feeding sleeve, is moved downwardly into sorting classifying staving by feeding pipe by gravity.
The material entered in sorting classifying staving is progressively moved downward after certain distance, and material starts the height separation by density, by
Up big and down small in the lateral cross-sectional area of oblique staving, fluid flow velocity during rising slows down gradually, and motion is logical upwards for fine grained
Cross peripheral overflow weir and enter overflow launder, be used to control bucket at mouth under the coarse-fine coal blow-off valve and base cone of mouth under addendum cone
The mine tailing valve of volume density controls the size of spillway discharge.The thin mud of liquid-solid fluid bed coarse slime size Grading Overflow and most of water warp
The peripheral overflow weir for crossing oblique staving top is entered in overflow launder, and coarse-fine coal passes through the coarse-fine coal blow-off valve stream at mouth under addendum cone
Go out, realize desliming and the inspissation of liquid-solid fluid bed coarse slime size classifier overflow.Higher density material continues downward
Fluid distributor is moved to, fluid bed bed is entered, density passes through bed higher than the material of fluid bed bed density（Fluid point
Cloth device）Enter bottom, mine tailing turned into by the discharge of mine tailing valve, and the material of intermediate density in bed by backhauling under upper
It is dynamic, through separation is done step-by-step after a period of time.The formation of fluidized-bed layer is using pan feeding middle-high density material as medium, to pass through
The ascending water come in fluid distributor is fluid, forms fluid bed bed.
The utility model device, reduces the pollution of high ash thin mud in liquid-solid fluid bed coarse slime size machine overflow, and letter
Changed the follow-up desliming dewatering process of sorting, reduction cleans ash, reduce high grey thin mud to the pollution of cleaned coal, improve separating effect.
It can be achieved to sort in high precision under low-density, cleaned coal is polluted less by thin mud, and cleans ash is lower, and pan feeding ash content is below 25%
When, the cleans ash after sorting is suitable or lower with gravity treatment and floatation clean coal ash content.
Brief description of the drawings
Fig. 1 is the utility model desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant structural representation.
In figure：1- overflow pipes, 2- addendum cones, the coarse-fine coal blow-off valves of 3-, 4- upper barrel bodies, 5- flanges, 6- fluid distributors, 7- is put
Ore deposit valve, 8- mine tailing valves, 9- base cones, 10- lower barrel bodies, 11- pan feeding sleeves, 12- feeding pipes, the oblique stavings of 13-, 14- overflow launders.
Embodiment of the present utility model is further described below in conjunction with the accompanying drawings:
As shown in Fig. 1, the utility model desliming type liquid-solid fluid bed coarse slime size overflow cleaned coal grading plant, by dividing
Choosing classification staving, overflow desliming device and fluid distributor 6 are constituted.The sorting classifying staving, by upper barrel body 4, lower barrel body 10
Constituted with base cone 9, upper barrel body and lower barrel body are connected as a single entity by flange, the lower mouth of the suitable for reading and lower barrel body of base cone 9 is connected, fluid
Distributor is arranged between base cone 9 and lower barrel body 10, and fluid distributor is communicated with outer connecting pipe.Fluid distributor is existing skill
Art, Chinese utility model patent（The patent No.：ZL200720037745.0）There is abundant disclosure to the structure of fluid distributor.Upper bucket
The top of body 4 is provided with pan feeding sleeve（Feeding mouth）11, feeding pipe 12 is enclosed in pan feeding sleeve.Overflow desliming device is big on sectional area
Under small oblique staving 13 and addendum cone 2 constitute.The top peripheral of oblique staving is set with overflow launder 14, and the bottom of overflow launder is provided with one
Overflow pipe 1.The lower mouth of addendum cone（Outlet）Coarse-fine coal blow-off valve 3 of the place provided with control coarse slime flow.9 times mouths of base cone（Outlet）Place
Mine tailing valve 8 provided with control staving density is clear so as to mine tailing provided with the bypass pipe controlled by draw valve 7 by base cone outlet side
The course of work:Material, even into pan feeding sleeve, sorting point is moved downwardly into by gravity by feeding pipe
In level staving.The material entered in sorting classifying staving is progressively moved downward after certain distance, and material starts the height by density
Low separation, because the lateral cross-sectional area of oblique staving is up big and down small, fluid flow velocity during rising slows down gradually, fine grained to
Upper motion enters overflow launder by peripheral overflow weir, is used at mouth under the coarse-fine coal blow-off valve and base cone of mouth under addendum cone
The size of spillway discharge is controlled in the mine tailing valve of control staving density.The thin mud of liquid-solid fluid bed coarse slime size Grading Overflow and big
Part water is entered in overflow launder by the peripheral overflow weir on oblique staving top, and coarse-fine coal is arranged by the coarse-fine coal at mouth under addendum cone
Expect valve outflow, realize desliming and the inspissation of liquid-solid fluid bed coarse slime size classifier overflow.Higher density material after
It is continuous to be moved downwardly to fluid distributor, fluid bed bed is entered, density passes through bed higher than the material of fluid bed bed density
（Fluid distributor）Bottom is entered, mine tailing is turned into by the discharge of mine tailing valve, and the material of intermediate density passes through upper in bed
Under move back and forth, through separation is done step-by-step after a period of time.The formation of fluidized-bed layer is using pan feeding middle-high density material as Jie
Matter, using the ascending water by coming in fluid distributor as fluid, forms fluid bed bed.