SU844047A1 - Washing drum for ore grinding mills - Google Patents

Description

one

The invention relates to the grinding and separation of solid materials, mainly in the mining industry, and can be used in the processing plants of ferrous and non-ferrous metallurgy in mills with central discharge without grates.

A known butara containing a body made in the form of a conical shell, a screw conveyor for returning a large class of ore for re-grinding, connected with a cochlear feeder, a feed and drain opening 1.

In this butare, the classifying surface (sieve) passes a large amount of large class in the pulp, and the reduction of the cells of the sieve leads to a decrease in its living cross section, rapid clogging and causes technological difficulties in obtaining the sieve surface. Passing a large class leads to its recirculation in the technological chain, limiting equipment performance and increasing its wear.

The closest to the technical essence of the invention is a butara, comprising a housing with a device for returning undersized material, a loading opening with a socket and a drain opening with a diaphragm 2.

In this butare, the separation by size occurs between the conical socket and the diaphragm of the butare, the thin material is unloaded through the diaphragm, and the heavily seated large is first transported by a screw conveyor to the cochlear feeder and then returned to the mill for grinding. Such a large-scale return scheme complicates the design of the bottle, and the location of the discharge port of the cochlear feeder in the center of the loading opening facilitates the flow of the pulp coming into the conical socket from a large material mill,

returning by the cochlear feeder, which creates a circulation of coarse material in the bottle, which impairs separation and, in turn, leads to the passage of a large class through the diaphragm, to its circulation

in the technological chain, limiting the performance of the mill and increased wear of auxiliary equipment.

The purpose of the invention is to simplify the design of butare and improve the quality of the classification of the grinding product.

This is achieved by the fact that in a bottle containing a housing with a device for returning undersized material, a charging opening with a socket and a drain opening

with a diaphragm, a device for returning the undersized material is made in the form of a series of annular disks, with windows along the periphery installed inside the housing and interconnected by means of transporting partitions, and a transport device is mounted inside the socket.

- The implementation of a device for returning a large class in the form of a disk conveyor, which simultaneously performs the functions of a screw conveyor and cochlea feeder, simplifies the design and operation of the bottar, and transferring the unloading zone of the large class from the center of the loading opening to the periphery reduces the circulation of the large class in the bottle, Since the coarse material put out into the window below the bell is captured by the intra-chamber flow of the mill and fed to the grinding area.

The absence of the cochlear feeder in the invention and peripheral unloading of a large class, due to the design of the disk conveyor, made it possible to install a coarse classification device in the socket and thus ensure that the large class returns to the beginning of the sleeve, not passing it to the diaphragm, which reduces equipment classification of the product of grinding.

FIG. 1 shows the proposed butara, a general view; in fig. 2 - section A - A of FIG. one; in fig. 3 - section bb FIG. one.

The Butare consists of a housing 1, made in the form of a conical solid shell, annular disks 2, installed perpendicular to the axis of the butare, with overflow 3 and discharge 4 windows, the edges of which are diagonally connected by conveying partitions 5, made to an L-shaped bell, discharge opening 6 with a bell 7 and a screw conveyor 8, a discharge opening 9 with a diaphragm 10. With the aid of the flange 11 of the butara it is attached to the mouth of the mill.

Butara works as follows.

The pulp flowing into the bout shale from the mill enters the conical socket 7 and moves to the diaphragm’s discharge zone.

10. Coarse material deposited in the socket 7 returns to the mill by the conveyor 8, and the pulp that has passed the annular disk, the diaphragm 2 of the socket 7, enters the housing of the container 1 where the separation takes place. When the mill is rotated, a large class is captured by the transport partitions 5 and returns through the window 4 to regrind, and captured by the partitions 5

thin class returns through overflow windows 3.

The proposed butara containing a disk conveyor is easy to manufacture, and the absence of a cochlear feeder with a discharge nozzle in the loading opening along the axis of the butare increases the productivity of the mill by intensifying the unloading and eliminating the circulation of a large class, which allows

obtain a thinner class at the exit of the butara and thereby increase the service life of the equipment of the technological chain.

Claims (2)

1. A container for ore grinding mills, comprising a housing with a device for returning undersized material, a charging opening with a socket and a drain a hole with a diaphragm, characterized in that, in order to simplify the design and improve the quality of the product grinding classification, a device for returning the undersized material is made to as a series of annular disks, with windows along the periphery, installed inside the case and interconnected by means of transporting partitions, and the transporting part is mounted inside the socket device. 2. The container according to claim 1, characterized in that the transport partitions are L-shaped. Sources of information taken into account in the examination 1. USSR author's certificate No. 582830, cl. B 02C 17/18, 1975. 2. USSR author's certificate number 416089, cl. In 02C 17/18, 1972 (prototype). corner 2 / ff f Pr /: L