Novel magnetite beneficiation process

Abstract

The invention belongs to the technical field of magnetite beneficiation, and particularly relates to a novel magnetite beneficiation process. The novel magnetite beneficiation process is performed by carrying out first-stage grinding, classification for the first time, magnetic separation for the first time, classification for the second time, second-stage grinding, magnetic separation for the second time, screening for the first time, permanent dewatering, third-stage grinding, magnetic separation for the third time, magnetic separation for the fourth time, screening for the second time and magnetic separation for the fifth time on raw ore to obtain concentrate and tailings, wherein the selected ore is divided into normal, poor and good three cases, the grade of the selected ore of each case is divided into normal, high and low three conditions, the control parameters of an electromagnetic vibration net fine sieve are reasonably set, and the start-up number of the electromagnetic vibration net fine sieve and the starting of other related equipment are adjusted, so as to control the screening efficiency at 45-55% and the fluctuation of the grade of the minus sieve ore less than 0.5%. According to the invention, a control model and a control strategy for realizing the fully automatic operation of the electromagnetic vibration net fine sieve are provided, and the energy is savedand the consumption is reduced while guaranteeing the final product quality stability.

Description

technical field [0001] The invention belongs to the technical field of magnetite beneficiation, in particular to a novel magnetite beneficiation process. Background technique [0002] The Anshan-type magnetite beneficiation process first applied fine screen in the 1970s. Its application once greatly improved the grade of magnetite beneficiation concentrate. The opening rate is only about 7%, the vibration method is to vibrate the whole sieve body through the mechanical beating device, and the screening efficiency is only 15-20%. As a vibrating device, the high-frequency vibrating fine screen is applied. Although the vibration frequency is high, the whole sieve body is still vibrated, and the screening efficiency can reach up to 30%. Since the beginning of this century, there have been electromagnetic vibrating fine screens that use electromagnetic force as the vibration source to directly vibrate the screen. The feature is that the screen is made of metal braided mesh, the ...

AI Technical Summary

Problems solved by technology

However, due to the fact that most of the raw ore grades of magnetite ore in my country are relatively low, and there are characteristics such as fine particle size, uneven distribution, large changes in raw ore grade and selectivity, there is a need to use electromagnetic vibration vibrating mesh fine screen as quality upgrading equipment. Large fluctuations in screening efficiency lead to large fluctuations in process indicators. At present, there is no mature and scientific method to adjust the operating parameters of the electromagnetic vibrating mesh fine screen to ensure the stability of process indicators.

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