Preparation method of inhibitors for arsenic-containing sulfide minerals in copper tailings

Abstract

The invention discloses a preparation method of inhibitors for arsenic-containing sulfide minerals in copper tailings. According to the method, for the characteristic that the surfaces of arsenopyrite and pyrites in the copper tailings have been oxidized, the inhibitor with the electrochemistry reducibility is used for eliminating oxidation products on the surfaces of the arsenopyrite and the pyrites in the copper tailings; and meanwhile, by adding the inhibitor which can generate the selective inhibition effect on the arsenopyrite, the surfaces of the arsenopyrite are oxidized to generate precipitate, and therefore separation of the arsenopyrite and the pyrites in the copper tailings is achieved. The method includes the following steps that a solution A, a solution B and a solution C are prepared, and concentration and crystallization are conducted. According to the preparation method, through the inorganic and organic compound reaction, a product with the complicated complexing structure and the electrochemistry reducibility is formed, and arsenate on the surfaces of the arsenopyrite and sulfite on the surfaces of the pyrites can be removed; and meanwhile, by means of the reducibility and coordination capacity of thiourea groups and benzene ring quinone groups, inhibition on the surfaces of the arsenopyrite is achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical beneficiation, and in particular relates to a preparation method of an inhibitor of arsenic-containing sulfide minerals in copper tailings, which is suitable for the flotation separation of arsenic and sulfur in copper beneficiation tailings. Background technique [0002] my country is rich in copper resources. Due to the low content of copper in the ore, a large amount of tailings will be produced in the process of copper beneficiation. The problem of arsenic pollution in water bodies is harmful to people's lives. Therefore, it is of great significance to recover arsenic minerals in copper tailings. [0003] The arsenic-containing minerals in copper tailings are generally arsenopyrite, arsenophyllite and pyrite, among which arsenopyrite has the highest arsenic content and is the most difficult to recover in tailings. When arsenopyrite coexists with pyrite, it not only affects the quality of sulf...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of difficult recovery of arsenopyrite in copper tailings, and aiming at the properties of arsenopyrite in copper tailings, the present invention provides a method for preparing an inhibitor of arsenic-containing sulfide minerals in copper tailings

The inhibitor prepared by the method can overcome problems such as high alkalinity of copper tailings, surface oxidation and mutual interference of minerals