Device to concentrate fine slimes containing magnetic minerals

FIELD: process engineering.

SUBSTANCE: invention relates to gold mining for concentration of fine gold in primary collective concentrates containing magnetic minerals and may be used at slime concentration units of gold fields and concentration plants. Proposed device comprises continuous loading and unloading, magnetic mineral separation chamber and made up of vertical rectangular container, nonmagnetic mineral separator and special-design splitter. To separate magnetic mineral from primary collective concentrates, movable metal case with permanent magnets is arranged on all four sides of vertical nonmagnetic chamber to remove force magnetic minerals from chamber walls to 70-100 mm therefrom and wash them off. Thereafter, metal case is again pressed against the chamber. Note here that aforesaid splitter is made up of quadrangular truncated pyramid.

EFFECT: higher efficiency.

1 dwg

 

The invention relates to a gold mining industry for the enrichment of fine gold in the primary collective concentrates containing magnetic minerals, and can be used on silicoaluminothermic installations, mines and concentrators.

The famous gateway to enrich placers and concentrates with rubber mats in the front compartment which is located a rotating magnetic drum with a scraper to remove the magnetic minerals from enriched material [1]. The disadvantage of this invention is the inevitable demolition of the gold in the tailings. This is because the lines of force of the permanent magnets attached alternating poles on the drum, closed between unlike poles, especially at the joints magnets, zadamlya minerals, including gold particles.

Closest to the proposed invention is a Device and method for enrichment of fine concentrates" [2]. The device includes a camera for separation of magnetic minerals in the form of a vertical tank having a rectangular cross-section of 200100 mm and a height of 180 mm of non-magnetic material provided outside the fixed permanent magnets, and a camera to capture the non-magnetic fraction with a rectangular cross-section of 20040 mm height 70 mm and special devices divider. The disadvantage of this device is the absence of the influence of special mechanism for the efficient removal of prolepsis magnetic minerals on the walls of the chamber for separation of magnetic minerals, which continuously during the whole process, reducing the permeability of the enriched slurry.

The essence of the device for the enrichment of fine concentrates containing magnetic minerals, is that in the present invention for removal of magnetic minerals from the stream of primary pulp collective concentrates on all sides by the vertical camera of a nonmagnetic material is a movable metal casing with permanent magnets. As sufficient accumulation of magnetic minerals on the walls of the chamber for more movable metal casing has an opportunity to move away from the walls on all four sides of the camera outside of the magnetic field (70-100 mm). After removal of the magnetic minerals metal casing is again pressed to the camera for the best washing concentrates special divider made in the form of a quadrangular truncated pyramid.

The use of such devices in the practice of primary enrichment collective concentrates is unknown and the proposed device meets the criterion of "Novelty."

In comparison with the known devices the proposed device, the new properties are:

- the use of movable metal casing with magnets in the pushed position facilitates timely the military-effective treatment of the water stream selected magnetic minerals with the working area of the camera;

- using a special cutter (truncated quadrangular pyramid) creates a uniform distribution of particles of minerals, gold and magnetic minerals in a continuous flow of water, contributing to the emergence of better conditions of leaching of selected magnetic minerals, thus the device meets the criterion of "inventive step".

The invention is illustrated in figure 1 and consists of a feed hopper 1, the dispenser 2, a feed hopper 3, special divider of the flow of pulp (truncated quadrangular pyramid) 4, camera removal of magnetic minerals, made of a nonmagnetic material 5, moving more metal covers with samosobrannyi on their inner surface of the permanent magnet and the movement mechanisms 6, a camera to capture the non-magnetic fraction 7, collector nonmagnetic fractions 8, hatch to release non-magnetic fraction 9, heat for magnetic minerals 10, hatch to release the magnetic fraction 11, a metal frame for the fixed fastening of the device to the camera removal of magnetic minerals 12.

The device works by loading the primary collective concentrates in the hopper, movable metal casing with magnets on all sides tightly mounted around the non-magnetic wall of the chamber for removal of magnetic mineral is. Is a stream of water and continuously dosed necessary portion of the enriched slurry. The bulk of the selected magnetic minerals under the influence of a magnetic field by the flow of the pulp is removed in the discharge chute for magnetic minerals. In position clamping the metal casing magnets to the wall of the chamber a small part of the magnetic minerals remains on the walls of the chamber and gradually accumulates with the formation of a dense compacted mass of the pile. With their increase possible reduction of permeability enriched pulp and loss of useful components in the working area of separation of magnetic minerals. In order to eliminate this negative effect from time to time you should move the magnetic casing from the chamber walls. After removal from the chamber walls dense Warsaw magnetic minerals repeat the process, and moving the covers with magnets again firmly pressed against the walls of the chamber.

During the test magnetic gateways, EGGS SB RAS. Nvertigo on evalnih tails jigging of Prompribor received collective concentrate with a content of free gold - 30 g/t in the oscillations of the metal content in different parts of the gateway from 10 to 80 g/t (Report on the research work of the specified institution "Feasibility of capture of small gold magnetic gateway program "Colored m is of Tallaght"). While the extraction of gold from the source of power jigging of Prompribor was only 5-7%, other useful components amounted to a loss of magnetic minerals. Repeated laboratory enrichment (extract) concentrates conducted in the proposed device with the destruction of magnetic minerals. As a result of effective enrichment in the stream of the proposed device, the average value of increasing the recovery at all sampling sites of the gateway was 8,56%. High rates of extraction achieved concentrates: CE-13 - to 30.15% and CE-18 - 20,67%; and low value samples CE-7 amounted to 1.35%.

Sources of information

1. Utility model RF 6348 U1 6 B 03 B 5/70/ Gateway to enrich placers and concentrates /V.R. Larionov, et al S.M., Vinokurov VP, Matveev AI BI No. 4 16.04.1998,

2. RF patent MKI B 03 B 5/68 No. 2149693 /Device and method of enrichment of fine concentrates / Bechev M.I. and other publ. BI No. 15 27.05.2000, Appl. 25.12.1997,

A device for enriching the fine concentrates containing magnetic minerals with continuous loading and unloading, consisting of the chamber for removal of magnetic minerals from the vertical rectangular tank made of non-magnetic material, a camera to capture the non-magnetic fraction and a special device-divider, characterized in that the removal of magnetic minerals from the primary flow is collective concentrates on all four sides of a vertical non-magnetic camera is movable metal casing with permanent magnets, with the possibility of separation from the walls of the nonmagnetic camera outside the scope magnetic field 70-100 mm and flush with the accumulation of lint from percolating through the flow of the magnetic non-magnetic minerals in the walls of the chamber, after removing the metal casing is again pressed to the camera, and a special divider made in the form of a quadrangular truncated pyramid.



 

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