Reduction roasting magnetic separation process of low-grade raw iron ores

Abstract

The invention discloses a reduction roasting magnetic separation process of low-grade raw iron ores. In the invention, an ore dressing process combining roasting and magnetic separation is used, process parameters are reasonably adjusted and allocated according to the characteristics of iron ores; the grade of the qualified ores is as low as 36 percent; the yield at each stage can be reasonably controlled, so that the grade of iron ore concentrate reaches over TFe55.45 percent; the invention is applicable for specified low-grade raw iron ores containing impurities and can be used for dressinghigher-grade iron ore concentrate suitable for smelting; the equipment has less energy consumption and higher yield and saves the exploration and smelting costs of iron ores; meanwhile, a mine waste reservoir and a slag site are subjected to geology environmental governance, thus the invention improves the ecological environment of peripheral areas of the mine waste reservoir and the slag site, ensures the safety of a dam body and the safe running of the mine waste reservoir, achieves a large goal of building an environment-friendly society to thoroughly improve the peripheral environment of the reservoir area and the slag site, and has better environment benefit.

Description

technical field [0001] The invention relates to a low-grade iron ore treatment process, in particular to a reduction roasting magnetic separation process for low-grade iron ore raw ore. Background technique [0002] As an industrial and construction material, the use of steel is increasing year by year; the amount of concentrate required for steelmaking production is also increasing year by year. Although my country's iron ore resources are widely distributed, the basic situation is that there are many lean ores and few rich ores; 80% of the iron ore of domestic large-scale iron and steel enterprises is imported from abroad, which is controlled by foreign iron ore enterprises. Due to the increasing consumption of iron ore and the high price of high-grade ore, it is necessary to develop and utilize domestic low-grade iron ore resources, increase the proportion of domestic iron and steel enterprises using domestic ore and self-produced ore, reduce the cost per ton of steel, an...

AI Technical Summary

Problems solved by technology

Since the existing beneficiation equipment cannot beneficiate TFe<40%, a large number of ores with TFe<40% are piled up and discarded, which increases mining costs and thus increases the cost of iron and steel smelting enterprises

If the existing beneficiation device is used for beneficiation, it will cause problems such as excessive energy consumption of the equipment and low yield.

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