A method for magnetic-flotation separation and comprehensive utilization of high-sulfur magnetite concentrate

Abstract

The invention discloses a magnetic-flotation separation and comprehensive-utilization method for high-sulfur magnetite concentrate. The magnetic-floatation separation and comprehensive-utilization method comprises the following steps: performing ore grinding and weak magnetic separation on the high-sulfur magnetite concentrate to obtain weak magnetic-separation iron ore concentrate with TFe gradehigher than or equal to 64.0% and TS grade higher than or equal to 10.0%, performing primary flotation sulfur rough concentration, primary flotation sulfur concentration and primary flotation sulfur scavenging on the weak magnetic-separation iron ore concentrate to obtain the high-sulfur magnetite concentrate with TS grade higher than 24.0% and TFe grade higher than 60.0%, feeding discharged primary scavenging floating sulfur tailings into floating sulfur scavenging open operation to separately obtain a coal-separation heavy-medium product with iron grade greater than 63.0% and iron ore concentrate with iron grade greater than 67.0% and TS content lower than 1.1%, and taking the obtained high-sulfur magnetite concentrate with TS grade greater than 24.0% and TFe grade greater than 60.0% asraw materials for preparing acid of a sulfur plant. Sulfuric-acid residues obtained after acid preparation can be directly used as qualified iron ore concentrate, so that iron ore concentrate sulfur removal is realized, and comprehensive utilization of resource is realized, and therefore, economic benefits, social benefits and environmental benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a sulfur and iron separation and comprehensive utilization method of high-sulfur magnetite concentrate. Background technique [0002] With the development of the economic and social environment, my country's quality requirements for iron concentrates are getting higher and higher, especially for the sulfur content in iron concentrates. The sulfur content in iron concentrate has a key impact on ironmaking and steelmaking, and is also harmful to blast furnace production. Sulfur emissions also cause great pollution to the environment. Therefore, the desulfurization of high-sulfur magnetite is an important task, which can play an important role in promoting my country's economic development and environmental protection. Therefore, the impurity sulfur content in the furnace iron concentrate should be strictly controlled, generally requiring TS<0.40 %. Ho...

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Problems solved by technology

[0006] The purpose of the present invention is to provide an iron concentrate with high grade, good desulfurization effect and can obtain three Magnetic-flotation separation and comprehensive utilization method of high-sulfur magnetite concentrate

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