Magnetic suspension purification technology for iron powder

Abstract

The invention discloses a magnetic suspension purification technology for iron powder, and relates to the technical field of beneficiation and purification of metal mines. A method includes the steps that fine iron powder with the grade higher than 65% is selected as a raw production material, clean water is added into the fine iron powder, the fine iron powder and the clean water are stirred uniformly, and then a stirring mill grinds the mixture to the qualified ore grinding granularity; the mixture passes through parallel magnetic field channels and are uniformly distributed inside the magnetic field channels under the effect of the gravitation of parallel magnetic fields, gangue without magnetism is naturally separated from the iron powder and falls off, water flow washes away the gangue, and finally the fine iron powder is left; the fine iron powder is dehydrated. A computer controls the magnetic fields to move in the direction opposite to the direction of the water flow, the fine iron powder is driven to move in the direction opposite to the direction of the water flow, and therefore continuous production of beneficiation is realized. According to the magnetic suspension purification technology for the iron powder, the problems that the beneficiation cost is high and the product purity is low are solved.

Description

technical field [0001] The invention relates to the technical field of beneficiation and purification of metal ores, in particular to the iron powder magnetic suspension purification technology. Background technique [0002] Pure iron powder is an important raw material for powder metallurgy and permanent magnet motors. Powder metallurgy is an industrial technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to produce metal materials, composite materials and various types of products. At present, powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, and has become one of the most dynamic branches of new material science. Powder metallurgy technology has a series of advantages such as significant energy saving, material saving, excellent performance, high product pr...

AI Technical Summary

Problems solved by technology

[0003] The base material of powder metallurgy is pure iron powder. Most of the raw materials for the production of pure iron powder in my country are scrap iron oxide scale from steel mills. Because of its complex composition, the "pure iron powder" produced by using it as a raw material cannot reach some high-end Purity and Performance Requirements for Powder Metallurgy Parts

Domestic mines suitable for the production of pure iron powder are mainly distributed in a few areas such as Liaoyang, Beipiao in the northeast and Zuoquan in Shanxi. Because of the constraints of the traditional magnetic separation process, it is relatively easy to produce ore powder with a grade of 65%. 71.5% or more is very difficult, resulting in the high cost of beneficiation in these areas, the output is extremely low, and it is far from meeting the demand of the domestic powder metallurgy market.