Mineral processing activator of sphalerite and sphalerite and method for zinc reduction by flotation of iron concentrate

Abstract

The invention relates to a beneficiation activator of sphalerite and sphalerite and a method for iron concentrate flotation zinc reduction. The activator is amino acid or a mixture containing amino acid; the amino acid is aspartic acid, aspartic acid One or more of hydrochloride, glutamic acid, glutamic acid hydrochloride, threonine, and serine. The method of using this activator to reduce zinc in iron concentrate flotation is to add the activator to the slurry of iron concentrate in weak magnetic separation, then add collector and foaming agent, and conduct a roughing and a beneficiation to float out Sphalerite and sphalerite, the zinc content in the obtained iron concentrate is as low as 0.02%, and the iron loss is less than 5%. The invention solves the problems of poor activation selectivity of conventional activators for sphalerite and sphalerite, difficulty in deep removal of zinc impurities in iron concentrate, and large iron loss in the zinc reduction process, and the method is simple, easy to operate, and has a good zinc reduction effect , can reduce zinc to less than 0.02%, and meet the content requirements of high-purity iron concentrate on zinc impurities.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a beneficiation activator for sphalerite and sphalerite and a method for flotation of iron concentrate to reduce zinc. Background technique [0002] At present, the zinc content of iron ore concentrate in my country is less than 0.1%, and some large steel companies require the zinc content to be less than 0.02% when producing high-purity iron ore concentrate. Excessive zinc content in iron ore concentrate not only directly affects the quality of steel, but also leads to abnormal distribution of blast furnace gas flow, upturned tuyere, damage to refractory bricks, furnace wall bonding and nodules, material collapse, and wind break during the steelmaking process. There are many problems such as the increase of the rate, which affects the normal production of the blast furnace. Therefore, to improve the quality of high-end special steel and ensure the smooth operation of...

AI Technical Summary

Problems solved by technology

Although these activators can indeed activate sphalerite and marmatite, there are following defects as iron concentrate deep dezincification activators: (1) the activation effect is not outstanding, and it is difficult to realize the deep zinc reduction of iron concentrate (such as reduce the zinc content to less than 0.02%); (2) the amount of iron loss is large, the activation performance of the above-mentioned agents is better under weakly acidic or alkaline conditions, and copper ions themselves can also activate iron minerals. Therefore, some weak magnetic The iron ore concentrate inevitably enters the zinc concentrate, resulting in a large loss of iron

Although these disclosed sphalerite and marmatite flotation activators have improved the selective activation and inhibition performance of the medicament and can be activated under low pH (7-11) conditions, they are still not suitable for iron ore concentrates. Depth flotation of ore to reduce zinc, a large amount of iron ore enters zinc concentrate, and a large amount of iron loss

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