Pyrrhotite beneficiation method with high alkalinity floating first and then magnetic separation

Abstract

The invention belongs to the technical field of metal mineral resource development, and particularly relates to a pyrrhotite beneficiation method. The method comprises the following steps: carrying out a copper flotation roughing process on pyrrhotite ore, and carrying out a copper flotation concentration process on obtained copper flotation concentrate; performing a copper flotation scavenging process on tailings obtained by the copper flotation roughing process; performing a sulfur roughing flotation process on the tailings obtained by the copper flotation scavenging process; performing a sulfur flotation scavenging process on the tailings obtained by the sulfur roughing flotation process; and performing a magnetic separation process on the tailings obtained by the sulfur flotation scavenging process so as to obtain iron ore concentrate. The method is particularly suitable for the pyrrhotite with low copper and high sulfur iron, high-alkali flotation is adopted in the process, then magnetic separation is conducted, and valuable metal, including metal copper, iron, sulfur, pyrrhotite and the like, in the copper-iron ore can be comprehensively recycled.

Description

technical field [0001] The invention relates to the fields of chemical industry and metallurgy, in particular to a beneficiation process of mixed ore of chalcopyrite, pyrite, magnetite and pyrrhotite. Background technique [0002] The Xinqiao copper-sulfur-iron deposit is a very important deposit in the Tongling ore concentration area of ​​the middle and lower reaches of the Yangtze River metallogenic belt in my country. This kind of deposit is relatively rich in sulfur reserves, which mainly contain chalcopyrite, pyrite, magnetite, magnetite Pyrite and other ores, and a small amount of galena and sphalerite and other ores. There are also many mines with similar deposits in our country, such as Tongling Dongguashan Copper Mine, Anhui Anqing Copper Mine, Tongling Zijin Mining and so on. [0003] The production capacity of Xinqiao Mine is 1.5 million tons per year, including 600,000 tons of underground mines and 900,000 tons of open-pit mines. tons of large polymetallic mines...

AI Technical Summary

Problems solved by technology

However, there are still some problems. First, affected by market conditions, it is difficult to sell low-sulfur concentrates with a sulfur content of about 40%, and the price is low.

The second is that the sulfur content of iron concentrates seriously exceeds the standard. Generally, the sulfur content of iron concentrates is above 3-4%, and sometimes it can even reach above 10%, and the iron recovery rate is not high.

Zhao Guanfei and others reclaimed high-sulfur copper-iron ore in Anhui and other places, but the iron concentrate contains high sulfur and is difficult to comprehensively utilize

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