Autocatalytic flotation reagent for sulfur-containing refractory minerals, and preparation method and application thereof

Abstract

The invention discloses an autocatalytic flotation reagent for sulfur-containing refractory minerals, and a preparation method and application thereof The autocatalytic flotation reagent is prepared from the following raw materials: 20-60 parts of a functional agent, 8-30 parts of a catalyst and 20-50 parts of an alkyl agent; wherein the functional agent is prepared from the following components in parts by mass: 65 to 85 parts of 5-amino-2-mercaptobenzothiazole and 15 to 35 parts of 1-propylsulfonic acid-3-methylimidazole, and the catalyst is prepared from the following components in parts bymass: 30 to 50 parts of Ni / gamma-Al2O3, 30 to 40 parts of CuSO4 and 20 to 30 parts of ZnSO4, and the alkyl agent is prepared from the following components: 45-55 parts of didecyldimethylammonium chloride, 30-40 parts of tetrabutylammonium hydrogen sulfate and 10-15 parts of tetradecyl trimethyl ammonium chloride. The autocatalytic flotation reagent has reaction medium effect and catalyst effect at the same time, and the sulfur reduction and quality improvement speed on sulfur-containing mineral refractory ore is increased.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a self-catalyzed flotation agent for sulfur-containing refractory minerals, a preparation method and application thereof. Background technique [0002] Sulfur element mainly exists in the form of pyrite in high-sulfur minerals, and a small amount exists in the form of marcasite, pyrrhotite, and sulfate. When high-sulfur minerals are utilized as resources, the presence of sulfur will cause many disadvantages. The hazards of sulfur mainly include the following aspects: (1) Corrosion of production equipment. Mainly manifested as S in the dissolution solution 2- It can react with the metal surface to form a loose structure iron sulfur compound, inhibit the formation of passivation on the metal surface of the equipment, and accelerate the corrosion of the production equipment. (2) Waste of experimental medicine. It is mainly manifested in the alkali reaction...

AI Technical Summary

Problems solved by technology

(2) Waste of experimental medicine

For example, in the treatment of high-sulfur bauxite, sulfur is finally transformed into FeS, Fe 2 o 3 and other precipitation into the red mud, at the same time, FeS, Fe 2 o 3 etc. to adsorb water and ions, increase the water content of red mud, and the increase of sulfur element has an impact on the classification and grinding of pulp, weakening the sedimentation capacity of red mud

(4) Pollution of the environment

This method has a wide range of applications, and is especially suitable for fine-grained minerals. The desulfurization rate reaches 92%. However, the dosage of chemicals is large, the flotation process is complicated, the requirements for particle size are high, and it is easy to cause secondary pollution.

Bu Xianzhong et al. used pine cones, pine needles, pine bark and sodium sulfide to prepare flotation reagents in "A Preparation Method and Application of Zinc-Sulphur Mineral Flotation Separation Inhibitor" (CN103990551B). Low flotation efficiency

Chen Xiangqing et al. proposed in "A Method for Desulfurization of High-sulfur Bauxite" (CN109201311A) to reduce the sulfur content by selective grinding and fine-grained separation. secondary pollution

Fu Jiangang et al. used flotation-mechanochemical activation treatment technology to desulfurize high-sulfur coal in "A Method for Deliming and Desulfurization of High-sulfur Coal" (CN108499724A).

Images