SU1766519A1 - Method for concentration of strong-magnetic ores - Google Patents

Abstract

Use: magnetic enrichment of minerals. The essence of the invention: a highly magnetic material is fed to the separation zone, where it is exposed to a magnetic field of 20-40 kA / m. The material is divided into two products: highly magnetic and weakly magnetic. The strong-hygiene product is scrubbed in a pulp stream at a intensity of 80-100 kA / m, and at the border of the console - air at a intensity of 20-40 kA / m. Unloading of a highly magnetic product is conducted at a intensity of 100-135 kA / m. The cleaning of a weakly magnetic product is carried out at a intensity of 60-80 kA / m. 1 hp ff, 1 tab.

Description

(L

with

The invention relates to the magnetic enrichment of minerals and can be used in the ferrous metallurgy in the processing plants processing magnetite ores,

A known method of enrichment of magnetite ores, which includes several stages of grinding, classification and magnetic separation, which is carried out at a magnetic field strength in the extraction zone of 30-56 kA / m, and in the cleaning-up zone - at a strength of 12-28.

The disadvantage of this method is the low efficiency of the separation process due to the irrational ratio of power modes in the areas of extraction and cleaning of the magnetic product.

The prototype is based on the method of enrichment of crushed highly magnetic ores, including feeding the original pulp into the separation zone, exposing it to this zone with a magnetic field of 16-40 kA / m, obtaining weakly magnetic and strongly magnetic products, clearing the weakly magnetic product with a magnetic field strength of 32 -56 kA / m and cleanup of a highly magnetic product with a magnetic field strength of 42-135 kA / m

Rz.

The disadvantage of this method is that the separation process is not sufficiently high due to the irrational ratio of the magnetic field strength regimes in different zones.

The purpose of the invention is to increase the efficiency of the magnetic separation process.

The goal is achieved by the fact that in the method involving the supply of the original pulp to the separation zone, the effect of a magnetic field on it is

ABOUT

sl)

40 kA / m to obtain highly magnetic and weakly magnetic products, their subsequent cleaning up in non-uniform magnetic fields and unloading separation products, cleaning up the weakly magnetic product when the magnetic field strength is 60-80 kA / m, cleaning up the strongly magnetic product in the pulp flow is The strengths of the mAtn of the floor are 800–100 kA / m, the cleaning of the 6-magnet product strings at the boundary of the Lt – air line is carried out at the strength of 20–40 kA / m, and the unloading of a strong magnetic product — with a strength of 100–135 kA / m .

The method was tested in laboratory laboratories x. The original pulp (concentrate of the first MMC intake) of the spiral classifier with an iron content of 56.3% and a grain size of 46% class — 0.074 mm was supplied to the separation zone of the PBM-PP magnetic separator with a magnetic system consisting of blocks with different magnetic field strengths . In the zone of separation of the initial pulp, a magnetic field with a strength of 20–40 kA / m was applied to produce weakly magnetic and strongly magnetic products. Then, the weakly magnetic product is scrubbed during its transportation at a magnetic field strength of 60–80 kA / m, and the strong magnetic product is scattered.

During transportation, they are cleaned at different magnetic field strengths, namely: in a pulp flow of 80-100 kA / m, g at the boundary of the pulp-air of 20-40 kA / m. The unloading of the highly magnetic product is carried out at a intensity of 100-135 kA / m. The test results of the proposed and known methods are shown in the table.

Claims (1)

The invention The method of enrichment of highly magnetic ores, including feeding the original pulp into the separation zone, exposing it to a magnetic field with a strength of 20-40 kA / m to obtain weakly magnetic and strongly magnetic products, their subsequent clean-up in non-uniform magnetic fields and unloading separation products, characterized by that, in order to increase the efficiency of the process, the cleaning of a weakly magnetic product is carried out with a non-uniform magnetic field strength of 60-80 kA / m, the cleaning of a strong-magnetic product in a stream lpy conducted at a field strength of 80-100 kA / m, recleaning strongly magnetic product at the interface pulp-air field strength is carried out at 20-40 kA / m, and the product unloading strongly magnetic field strength is carried out at 100 to 135 kA / m.