SU1475715A1 - Method of preparing magnetite ores to benification - Google Patents

Abstract

This invention relates to magnetic enrichment. The goal is to increase the efficiency of the preparation process by increasing the specific surface area. Grind and classify ore. After classification, wet magnetic enrichment of discharge classifiers is carried out in several stages in the isolation of tailings and enriched magnetic product. The latter is sent for grinding and classification into hydrocyclones operating in a closed loop with mills. Then, the material, after classification in hydrocyclones, is divided into magnetic separators with an initial magnetic field strength of 56–36 kA / m and subsequent 28–12 kA / m to obtain a concentrate and intermediate product. The latter is further rammed, selecting from it pre-dump tails.

Description

one

The invention relates to magnetic enrichment and can be used in preparation for the enrichment of silomagnetic ores.

The purpose of the invention is to increase the efficiency of the preparation process by increasing the specific surface of the ground material.

The method is carried out as follows.

The ore is crushed to a particle size of 25 (20) -0 mm, then the ore is ground in stage I mills, the material is classified, and the mills work with classifiers in a closed cycle. Next, a wet magnetic enrichment of discharge classifiers is carried out in several stages with the release of tailings and an enriched magnetic product. The latter is directed to a cycle of the second stage of grinding and classification in hydrocyclones operating in a closed cycle with mills. In this cycle, the material, after classification in hydrocyclones, is separated on magnetic separators with an initial magnetic field strength of 56–36 kA / m and subsequent 28–12 kA / m to produce fine iron-rich concentrate enriched in iron with a high specific surface to the iron depleted coarse intermediate product with low specific surface 4 SP

ate

314757154

ness. The concentrate is fed to the ore and the classification of the ore, which is followed by further refinement, and promoted by the fact that, with

The product is regrindted by isolating from a non-objective goal of increasing the efficiency of the process of preliminarily final tailings on the preparation session due to the increase in the magnetic separators with eg -H0 # ore surface, after the magnetic field classification is 1 00-105 kA / m. cations ore are separated in succession

The proposed method of preparation in a magnetic field with initial magnetic magnetite ores to an enrichment capacity of 56-36 kA / m and the following is applied in other stages from Yu 28-12 kA / m to obtain grinding concentration and classification. of the invention, the products are further ground

The method of preparation of magnetite after the separation of tailings of ores to enrichment, including because of.

Claims (1)

SUMMARY OF THE INVENTION A method for preparing magnetite ores for ore dressing, including grinding and classification of ore, characterized in that, in order to increase the efficiency of the preparation process by increasing the specific surface of the ore, after classification, the ore is separated sequentially in a magnetic field at an initial tension of 56-36 kA / m and the subsequent 28-12 kA / m to obtain a concentrate and industrial product, while the industrial products are further crushed after the selection of tailings. Compiled by N. Ashumov Editor I. Seglyanik Tehred A. Kravchuk Corrector. Cherni Order 2105/1 2 Circulation 499 · Subscribed VNIIIPI State 113035, Committee for Inventions and Discoveries under the USSR SCST Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and Publishing Plant Patent, Uzhgorod, st. Gagarina, 101