Mineral separation process of magnetic iron ore

Abstract

The invention discloses a beneficiation method for a pure magnetic iron ore. A crude ore is sequentially treated according to the steps such as first crushing, first-stage dry-type magnetic dressing, medium crushing, second-stage dry-type magnetic dressing, fine crushing and third-stage dry-type magnetic dressing, fine ore is obtained after a great amount of gangues are thrown by the third-stage dry-type magnetic dressing and sent to a grinding head sieve to be griddled and separated, granules griddled by the grinding head sieve are treated in a first-section magnetic dressing process, rough ore griddled by the grinding head sieve is treated in a first-section ball grinding and then enters the first-section magnetic dressing process; ore aggregates obtained from the first-section magnetic dressing process are treated in a second-section ball grinding after discharging gangue sands till the granularity of ore powder is -200meshes being more than or equal to 60 percent, ore powder generated from the second-section ball grinder are treated in second-section magnetic dressing, ore aggregates generated from the second-section magnetic dressing are treated in a high-frequency sieve after discharging gangue sands, products positioned on the high-frequency sieve are filtered to obtain ore concentrate, and products positioned below the high-frequency sieve are treated with desliming and then treated with floatation. The invention adopts two sections of grinding ore open-way processes and distinguishes the ore aggregates during the ore dressing process, thereby greatly reducing the energy consumption of a system, lowering the production cost and enhancing the utility ratio of equipment.

Description

technical field [0001] The invention belongs to ore dressing technology, in particular to a magnetite ore beneficiation method. Background technique [0002] In the prior art, in the mineral processing method of magnetite, the raw ore undergoes primary crushing, primary dry magnetic separation, medium crushing, secondary dry magnetic separation, fine crushing, and third dry magnetic separation. A large amount of gangue is thrown out by magnetic separation to obtain fine ore, which is sent to the grinding head sieve for sieving, and then goes through the steps of one-stage magnetic separation, one-stage ball milling, two-stage magnetic separation, two-stage ball milling, sieving, and flotation. In this mineral processing method, the magnetite enters the next process in turn, and the mineral material is not subdivided in time, resulting in large energy consumption and increased the cost of mineral processing. Contents of the invention [0003] The purpose of the present inv...

AI Technical Summary

Problems solved by technology

In this mineral processing method, the magnetite enters the next process in turn, and the mineral material is not subdivided in time, resulting in high energy consumption and increased mineral processing costs.