Method for raising iron content and reducing silicon in concentrate by means of low-intensity magnetic separation process

Abstract

The invention discloses a method for raising iron content and reducing silicon in concentrate by means of a low-intensity magnetic separation process. Aimed at the problems of floatation (reverse flotation) in the prior art in terms of raising iron content and reducing silicon in concentrate, a magnetic field screening method for separation and corresponding crashing and grinding process and equipment are adopted in order to achieve the goal of raising iron content and reducing silicon in concentrate. The method has the advantages of simple process, advanced equipment, low operating cost and remarkable economic benefit.

Description

technical field [0001] The invention relates to the field of magnetite beneficiation methods, in particular to a method for increasing iron and reducing silicon through a weak magnetic separation process. Background technique [0002] Anshan-style magnetite-poor ore resources are generally in a typical banded structure, black magnetite and white quartz bands alternate in parallel, and the thickness of the interlayer is 1-3mm. The useful minerals and gangue minerals have no close symbiotic relationship and are easy to dissociate. In terms of technology and equipment research and application, the "iron extraction and silicon reduction" of using magnetite ore to produce iron concentrate can be generally divided into two categories: magnetic separation and (reverse) flotation. Although the use of flotation or reverse flotation to increase iron and reduce silicon can achieve certain effects, the resulting drug consumption and power consumption are as many as millions, and the flo...

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