Method for recycling copper minerals from copper and sulfur separating tailings

Abstract

The invention discloses a method for recycling copper minerals from copper and sulfur separating tailings. The method comprises the following steps: performing size grading on the copper and sulfur separating tailings through a whirlcone, thereby obtaining overflow and sand settling; adding a regulator, a foaming agent and a first copper mineral collecting agent into the overflow under a natural pH value condition to perform roughing, thereby obtaining first rough concentrate; regulating the pH value of pulp to be 10-12 with lime for the sand setting, adding the foaming agent and the second copper mineral collecting agent, and performing roughening, thereby obtaining second rough concentrate; performing mineral grinding on the second rough concentrate to obtain mineral-grinded second roughconcentrate; combining the first rough concentrate with the mineral-grinded second rough concentrate, and adding the regulator and the first copper mineral collecting agent to perform concentration,thereby obtaining copper concentrate. The method can increase a recovery rate of the copper minerals, obtains copper concentrate with qualified grade, is moderate in middling circulating amount, is simple to operate, is stable in process, is convenient for field management, and is high in adaptation.

Description

technical field [0001] The invention relates to the technical field of copper-sulfur ore beneficiation, in particular to a method for recovering copper minerals from copper-sulfur separation tailings. Background technique [0002] Copper is the first metal discovered and used by humans. Because of its good ductility, thermal conductivity and electrical conductivity, it is widely used in electrical, transportation, construction and other industries, and plays an important role in the national economy. China is a big copper consumer and has a large demand for copper resources. With the gradual depletion of domestic high-grade and easy-to-mining copper ore resources, it is of great significance to strengthen the recovery of copper resources in tailings. [0003] Copper-sulfide ore is the main type of copper ore in my country. As the most important associated mineral of copper sulfide ore, pyrite has the characteristics of good buoyancy and easy activation by free copper ions. I...

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Problems solved by technology

[0004] The above factors lead to a wide particle size distribution of copper minerals in the copper-sulfur separation tailings, and the copper recovery rate is not high when the conventional flotation process is used to treat the copper-sulfur separation tailings; at the same time, the ratio of sulfur to copper in the copper-sulfur separation tailings is high, generally Under normal circumstances, the copper grade in the copper-sulfur separation tailings is 0.10% to 0.20%, and the sulfur grade is 30% to 40%. Iron ore is mainly dissociated pyrite, and its buoyancy is obviously better than that of copper minerals; in addition, because copper and sulfur are generally regrinded before separation, more fine mud is produced, and most of them enter the copper and sulfur In the separation of tailings, fine sludge is easily entrained into the final concentrate during the process of tailings copper separation, making it difficult to obtain qualified grade copper concentrate

To sum up, under the conventional flotation process and reagent system, it is desired to separate copper and sulfur from tailings with high sulfur-copper ratio, high fine sludge content, and copper minerals mainly composed of fine-grained copper minerals and copper-containing intergrowths. It is more difficult to recover copper minerals and obtain qualified grade copper concentrate

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