Production technology for lead and zinc floatation mineral powder

Abstract

The invention discloses a production technology for lead and zinc floatation mineral powder. The technology sequentially comprises the steps of a, ore crushing, b, ore grinding, c, ore dissolving pulp preparing, d, dosing and stirring, e, lead floatation, f, zinc floatation, g, water removing and h, milltailing treatment. Added drugs comprise inhibitors, collecting agents, activating agents and foaming agents. The inhibitors are made of one or several of zinc sulfate, lime, sodium sulphide and sodium sulfite, so that the hydrophilic property of the zinc ore is enhanced, and upward floating of the zinc ore is inhibited; the problem that the grade of zinc in the lead concentrates is high is solved, and the zinc recycling rate is improved; meanwhile, used flotation reagents are small in consumption, and the cost is saved; the whole production technology is environment-friendly; and the production technology is good in floatation effect, non-poisonous, free of time bound, wide in raw material resource and capable of being widely applied and popularized.

Description

technical field [0001] The invention relates to the technical field of mineral processing technology, in particular to the technical field of the production technology of lead-zinc flotation ore powder. Background technique [0002] Lead-zinc is one of the earliest metals extracted from lead-zinc ore by humans. There are 11 kinds of lead industrial minerals in lead-zinc mines, and 6 kinds of zinc industrial minerals, of which galena and sphalerite are the most important; The chemical formula of lead ore is PbS, the crystal structure is an equiaxed crystal system, the sulfur ions are the most closely packed into cubes, and the lead ions are filled in all octahedral voids; the chemical formula of sphalerite is ZnS, and the crystal structure is an equiaxed crystal system. Zn ions are distributed in the corners of the unit cell and the center of all faces, and S is located in the center of four of the eight small cubes divided into the unit cell. [0003] In the flotation of le...

AI Technical Summary

Problems solved by technology

At present, the commonly used inhibitors or inhibitor compositions mainly include: (1) Zinc sulfate and lime are used as the inhibitor composition. Will ionize Zn 2+ and SO 4 2- , Zn 2+ Hydrolysis produces Zn(OH) 2+ , in alkaline medium, to get HZnO - and ZnO 2 2- , they are adsorbed on the mineral surface to enhance the hydrophilicity of the mineral surface, but the effect of the composition is not obvious, the production index cannot meet the requirements, and the consumption of related chemicals is large; (2) Zinc sulfate and cyanide are used as inhibitors Composition, cyanide is mainly sodium cyanide and potassium cyanide, and also calcium cyanide; the main principle is that cyanide is a salt generated by strong base and weak acid, which is hydrolyzed in the pulp to generate HCN and CN - , used in combination with zinc sulfate to generate zinc precipitates, thereby inhibiting the flotation of zinc during the flotation process in the lead area, and can strengthen the inhibition of sphalerite, specifically when the mass ratio of cyanide:zinc sulfate is 1:2.5 When, CN - and Zn 2+ Formation of colloidal Zn(CN) 2 Precipitation inhibits the flotation of zinc, but cyanide is highly toxic, and the effect of the composition is not good; (3) sulfurous acid, sulfite or SO 2 Gas as inhibitor: sulfurous acid, sulfite or SO 2 As an inhibitor, the inhibitory effect is HSO 3 - , it needs to be in the weakly alkaline pulp to achieve the inhibitory effect, and the sulfite is easy to fail in the pulp, and the inhibitory effect is time-limited; Floating inhibitor or inhibitor composition, and then reduce the grade of zinc in lead concentrate in the flotation process, is an urgent need for lead-zinc ore beneficiation enterprises

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