SU1754211A1 - Device for concentrating and demineralizing sludges - Google Patents

Abstract

Usage: mineral processing. SUMMARY OF THE INVENTION: The cylindrical body (K) 1 is made with an inclined bottom b. In K 1, on the shaft 2, the disk (D) 3 is rotatably mounted; x s with radial grates. On D 3 there are installed concentric partitions made in a truncated cone. In the lower part of K 1 there are devices for discharging separation products, made in the form of conical inserts 7. Under D 3 there are 8-10 circular grooves. On the bottom 6, along the periphery of D 3, a conic filtering surface 5 is installed. The initial mixture flows through conduit 13 to a distribution cone 14 installed in the center of the rotating D 3. The flow is distributed in the first partition 4 and is thrown into the second partition 4. The heaviest grains unload into the chute 8, and the lungs into the chute 9. Water with sludge, past the gaps of the surface 5, enters the chute 10.1 sludge. / 7v / nff # vf with with 1 ate N3

Description

The invention relates to the enrichment of minerals, in particular, devices for the separation of materials according to density and dewatering, and can be used in the mining and coal industries.

A device for separating materials according to density is known, comprising a cylindrical body on springs with a supporting plane rigidly fixed thereto, which is divided by concentric walls with vertical slits in them. In the inner annular compartment there is a package of horizontal discs with openings attached to the central tube with openings under the lower disc. A conical roof with an opening for loading material is installed above the supporting plane.

The disadvantages of this apparatus are: low productivity due to the periodic unloading of heavy product, its low efficiency, since this apparatus is used only for the primary enrichment of fine-grained material and further enrichment is required, as well as the complexity of the design.

Closest to the present invention is a device for separating materials according to density or size, comprising a cylindrical housing with a bottom mounted on a shaft, a rotating disk made of radially arranged grates, the latter is equipped with concentric partitions in the form of a truncated cone, increasing in height from the center to the periphery and the bottom of the cylindrical body is inclined and provided with annular receivers and nozzles for outputting the separation products.

The disadvantages of the known device are the separation together with the concentrate of the main amount of water and its clogging with the most ash fine particles of sludge, which does not provide a sufficiently effective enrichment process, and also the slurry of the nozzles for the removal of separation products occurs, which reduces the enrichment efficiency.

The purpose of the invention is to increase the efficiency of enrichment.

The goal is achieved by the fact that in a device containing a cylindrical body with an inclined bottom, mounted in the housing on the shaft for rotation, a disk made of radially arranged grates are mounted on the disk and made in the form of a truncated

the cone, the concentric partitions and the devices for separating products located in the lower part of the housing, the conical filtering surface mounted on the bottom of the disk periphery, and the devices for removing the separation products are made in the form of conical inserts.

To ensure that the jet hits the filtering surface, the trajectory of its movement is determined by the equation

y: xtg / j gjsL (1 +, 20), (1)

i VQ

where y is the height of flight of the jet, cm;

ft is the angle of inclination of the initial velocity vector to the horizon, hail,

g is the acceleration of the force of gravity,

x - the distance of the jet in the horizontal direction, cm;

Vo - initial flight speed, see

The filtering surface is installed along the edge of the disk and at an angle of inclination of the generatrix, significantly larger than the friction angle of the concentrate to be dried, as a result of which the material is transported along the filtering surface under the force of gravity down into the conical bottom insert.

In order to transport the dried concentrate down the filter surface, the condition

sin a + q cos a a q cos a -ft sin a

(2)

where a is the acceleration of the moving particles of the concentrate,

g is the acceleration of the force of gravity, cm

a is the angle of inclination of the filtering surface to the horizon, hail;

ft is the coefficient of friction.

The implementation of devices for the removal of separation products in the form of conical inserts provides effective unloading of sludge with a small amount of water due to the application of a centrifugal floor during the rotational movement of the pulp when flowing out of the bottom, resulting in loosening of the settled material and bringing it to a suspended state.

The drawing shows the device, the cross section.

The device for enrichment and dewatering sludge includes a cylindrical body 1 with an inclined bottom 6, a disk 3 mounted on a shaft 2 for rotation, a radially arranged grate mounted on a disk and concentric partitions 4 mounted as a truncated cone. the periphery of the disk is a conical filtering surface 5, a device for discharging separation products, made in the form of conical inserts 7, and annular troughs 8-10. On top of the cylindrical housing there is a cover 11 with a hole in the center 12 for the pipeline 13. through which power is supplied to the distribution cone 14.

The device works as follows.

The initial suspended mixture flows through the conduit 13 through the cover 11 and the hole in it 12, the distribution cone 14, fixed in the center of the rotating disk 3. Under the action of centrifugal force, the flow is evenly distributed on the first concentric partition 4 and is thrown onto the second concentric partition 4 , moving along which the heaviest grains (with a density of more than 1800-2000 kg m3) are deposited and, when they leave the partition, they are lowered into the annular groove for the breed 8.

The remaining mineral grains with water flow are thrown onto the filtering surface 5, where de-sludge and dehydration of the concentrate occurs, which under the force of gravity is discharged into the annular gutter 9, the separated water with the sludge passes through the slots of the filtering surface 5.

drain ring gutter 10, formed by the housing 1 and the outer wall of the annular gutter concentrate 9.

The separated separation products along the annular grooves move to the discharge devices, where, when flowing through conical inserts 7, a rotational movement is obtained, which facilitates the efficient unloading of high-solids pulp.

The use of the device allows to increase the efficiency of enrichment due to the declining of the concentrate and to obtain a concentrate in a dehydrated form.

Claims (1)

Invention Formula A device for enriching and dewatering sludge. including a cylindrical housing with an inclined bottom, mounted in the housing on the shaft with the possibility of rotation, a disk made of radially arranged grates, concentric partitions mounted on the disk and made in the form of truncated cones and located in the lower part of the housing of the outlet for separation products, characterized by that, in order to increase the enrichment efficiency, it is provided with a conical filtering surface mounted on the bottom along the periphery of the disk, and yakts of separation are conic.