Comprehensive recovering process of multimetal sulfide mineral

Abstract

The present invention discloses one kind of comprehensive polymetal sulfide mineral recovering process. The recovering process combines a roasting process after adding proper amount of lime and potassium chloride into raw mineral and a wet metallurgical process to recover Cu, Zn, Co, S, Fe, etc from the polymetal sulfide mineral. It can obtain electrolytic copper, electrolytic zinc, electrolytic cobalt, potassium sulfate, iron ore concentrate and other products, and has Cu and Zn recovering rate over 94 % and 92 % separately, simplified production process, raised comprehensive metal recovering rate and high resource utilization rate.

Description

1. Technical field [0001] The invention relates to a comprehensive recovery method for mineral materials, in particular to a comprehensive recovery method for polymetallic sulfide ores containing low-grade copper, cobalt, zinc, iron and the like. 2. Background technology [0002] Polymetallic sulfide ores containing copper, cobalt, zinc, iron, etc. usually adopt conventional flotation process to obtain copper concentrate, zinc concentrate, cobalt sulfur concentrate, etc. when comprehensively recovering these metals, and then transport the obtained concentrate to Smelters smelt and recover copper, zinc, cobalt, sulfur and iron, among others. There are following defects in this process: [0003] 1. When the flotation process is used to treat polymetallic sulfide ores, especially low-grade complex polymetallic sulfide ores, due to the complexity of the metal occurrence state in the ore, the fine particle size of copper and zinc intercalation makes it difficult to separate copp...

AI Technical Summary

Problems solved by technology

[0003] 1. When the flotation process is used to treat polymetallic sulfide ores, especially low-grade complex polymetallic sulfide ores, due to the complexity of the metal occurrence state in the ore and the fine particle size of copper and zinc intercalation, it is difficult to separate copper, zinc and cobalt. Most of the ores need to be finely ground, and the grade of the concentrate is low and the quantity is large; since the concentrate will produce a large amount of sulfuric acid during the smelting process, the added value of sulfuric acid is not high, and the sales radius is small, which determines that the smelter should not be located in the mine Therefore, there are problems of large transportation volume and long distances in transporting concentrates from mines to smelters, especially in remote western regions and plateau areas, concentrates (especially cobalt-sulfur concentrates) must be transported thousands of kilometers away For smelters, transportation costs account for a large proportion of production costs, which seriously affects the economic benefits of mines

[0004] 2. Because the flotation process is difficult to obtain high-quality copper concentrate, the zinc recovery rate is low, and cobalt cannot be enriched into an ideal cobalt concentrate for smelting. In addition, the concentrate is lost during long-distance transportation. Therefore, the metal recovery rate is low, generally only about 75%, which affects resource utilization