Low-sulfur type copper-lead-zinc polymetallic ore sequential preferential flotation separation method

Abstract

The invention discloses a low-sulfur type copper-lead-zinc polymetallic ore sequential preferential flotation separation method. According to the technical scheme, flotation of copper is carried out before flotation of lead. In the preferential flotation of copper, a combined inhibitor T-9 is used, and effective separation of valuable element copper in ore from lead and zinc is realized under the condition of pH 6-7. In the preferential flotation of lead, an inhibitor F-8 is used, and floating of zinc mineral is effectively inhibited. The T-9 reduces floatation activity of lead and zinc minerals and effectively increases floatability difference between copper and lead and zinc minerals, and the composition is nontoxic and harmless and is green and pollution-free. The inhibitor F-8 has a good inhibiting effect on sphalerite, has high activity to galena and silver mineral, has a certain collecting effect on galena, and is good for reducing mutual Inclusion of lead and zinc in the product. By the method, the target minerals copper, lead and zinc are effectively separated, thus achieving the purpose of comprehensive recovery and utilization of mineral resources.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal beneficiation, and in particular relates to a method for preferential flotation separation of low-sulfur copper-lead-zinc polymetallic sulfide ores. Background technique [0002] With the acceleration of industrialization of mineral processing, limited mineral resources have been developed on a large scale, and improving the comprehensive utilization of mineral resources and energy conservation and environmental protection have become the theme of today. [0003] In the flotation process of non-ferrous polymetallic ore, the beneficiation of copper-lead-zinc polymetallic sulfide ore mostly adopts copper-lead mixed flotation-copper-lead separation and zinc separation process, and some processes such as copper-lead-zinc priority flotation and partial mixed flotation are also used. . In the copper-lead mixed flotation-copper-lead separation zinc separation process, the two most effective me...

AI Technical Summary

Problems solved by technology

In the copper-lead mixed flotation-copper-lead separation zinc separation process, the two most effective methods are cyanide inhibition of copper and leaching of lead and potassium dichromate inhibition of lead and leaching of copper. The former cyanide has a strong effect on copper minerals. Inhibition, but almost no inhibitory effect on lead, so the effect of suppressing copper floating lead is very good, but the disadvantage is that cyanide is highly toxic and will cause serious pollution to the environment; the latter uses potassium dichromate method to suppress lead floating copper, The advantage is that the dosage of the agent is small and the production operation is stable, but the dichromate ion is extremely difficult to handle and will cause serious pollution to the environment

For polymetallic sulfide ores with close mineral symbiosis and complex embedding relationship, some need to increase the grinding fineness to improve the monomer dissociation degree of minerals, so as to ensure the separation effect of minerals; during the grinding process, some secondary Copper minerals will produce copper ions to activate zinc minerals, making it difficult for zinc and sulfur to be inhibited, making it difficult to separate copper from zinc and sulfur minerals

[0004] At present, in the flotation process of copper-lead-zinc polymetallic ore, the most widely used process is copper-lead mixed flotation-copper-lead separation-tailings zinc separation process, which uses potassium dichromate or cyanide to separate copper Lead separation, although the separation effect is good, but it pollutes the environment and is not environmentally friendly; or some compound agents are used, which is environmentally friendly but the separation effect is poor, and the mutual inclusion of copper and lead is serious