Method for recovering sulfur and iron from complex copper sulfur and iron polymetallic ore containing easily floatable silicate gangue

Abstract

The invention discloses a method for recovering sulfur and iron from a complex copper sulfur and iron polymetallic ore containing easily floatable silicate gangue. The method comprises the following steps that (1) copper concentrate and copper-separation tailings are obtained from copper separation of a raw ore; (2) weak magnetic separation of the copper-separation tailings is carried out to obtain high sulfur iron concentrate and weak magnetic separation tailings; (3) strong magnetic separation concentrate and strong magnetic separation tailings are obtained from the magnetic separation of the weak magnetic separation tailings; (4) the strong magnetic separation concentrate is subjected to flotation to recover magnetic sulfur and iron, and weak magnetic separation pyrrhotite and magnetiteare recovered to obtain high sulfur iron concentrate; and (5) the strong magnetic separation tailings are subjected to flotation to recover non-magnetic sulfur and iron and non-magnetic pyrite to obtain sulfur concentrate. The method for recovering the sulfur and the iron from the complex copper sulfur and iron polymetallic ore containing the easily floatable silicate gangue has the beneficial effects that the flotation of sulfur from the strong magnetic separation tailings is carried out, due to the fact that the interference of weak magnetic silicate iron minerals on the separation is eliminated, operation conditions of pyrite separation are improved, the sulfur and iron grades of high sulfur concentrate are improved and stabilized, the product quality of low sulfur concentrate is improved, the marketing requirements are met, the comprehensive recovery rates of sulfur and iron resources are increased, and the sulfur content of tailings is decreased.

Description

technical field [0001] The invention relates to the fields of mine ecological environment and tailings resource reuse, in particular to a method for recovering sulfur and iron from complex copper-sulfur-iron polymetallic ores containing easily floating silicate gangue. Background technique [0002] A complex copper-sulphur-iron polymetallic ore containing easily floating silicate gangue has a geological reserve of 102.18 million tons. The main components in the ore are copper, sulfur and iron, accompanied by gold and silver. The copper grade was 0.94%, the sulfur grade was 12.53%, the iron grade was 23.97%, and the gold and silver grades were 0.27g / t and 8.22g / t respectively. Copper in the ore mainly exists in minerals such as chalcopyrite (accounting for 86.02%) and black copper ore (accounting for 8.04%); sulfur mainly exists in pyrrhotite (accounting for 58.01%), pyrite, marcasite and colloidal yellow Iron ore (accounting for 30.95%) and other minerals exist; iron mainl...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to increase and stabilize the sulfur and iron grades of high-sulfur concentrates, improve the product quality of low-sulfur concentrates, meet market sales requirements, increase the comprehensive recovery rate of sulfur and iron resources, and reduce the sulfur content of tailings. , to provide a method for recovering sulfur and iron from complex copper-sulfur-iron polymetallic ores containing easily floating silicate gangue

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