Method for extracting manganese and comprehensively recovering nickel, cobalt and copper by beneficiation and smelting of cobalt-manganese polymetallic oxide ore

Abstract

The invention discloses a method for cobalt-manganese polymetallic oxide ore beneficiation and smelting combined to extract manganese and comprehensively recover nickel, cobalt and copper. ore; mix fine ore with reducing agent, metallization auxiliaries and water, and press into pellets; after drying and preheating treatment of pellets, transfer them to reduction furnace for metallization reduction roasting at 1000-1300 ℃, reducing The roasted material is cooled; the cooled material is crushed, ground, and magnetically separated to obtain nickel-cobalt-copper mixed concentrate and manganese concentrate; Manganese leaching solution and residue are obtained by liquid separation; vulcanizing agent is added to the manganese leaching solution for purification to obtain manganese sulfate solution and metal sulfide; manganese sulfate solution is electrolyzed to produce electrolytic manganese or electrolytic manganese dioxide. The invention not only has the advantages of simple process, low post-treatment amount and high recovery rate, but also low energy consumption and low cost.

Description

technical field [0001] The invention relates to the technical field of beneficiation and metallurgy of cobalt-manganese polymetallic oxide ore, in particular to a method for combined extraction of manganese and comprehensive recovery of nickel, cobalt and copper from cobalt-manganese polymetallic oxide ore dressing and smelting. Background technique [0002] Manganese is an important industrial raw material. With the development of science and technology, manganese and its compounds are widely used in metallurgy, chemical industry, light industry, electronic materials, agriculture and animal husbandry and other fields. The main feature of manganese ore resources in my country is that there are more lean ore and less rich ore. The traditional domestic manganese ore resources are mainly manganese carbonate ore, and manganese oxide ore is seldom developed and utilized due to its intractability and complex process. In recent years, with the reduction of manganese carbonate ore ...

AI Technical Summary

Problems solved by technology

[0004] Due to the close symbiosis of manganese minerals in cobalt-manganese polymetallic ore and impurity minerals such as gangue, direct physical beneficiation cannot be separated and enriched. The current public research methods are to extract manganese through direct smelting and comprehensively recover nickel, cobalt, and copper. Direct smelting Roughly divided into pyrometallurgy, direct wet leaching, reduction roasting-acid leaching, but direct smelting needs to consume a large amount of reducing agent and smelting aids, and the cost is relatively high

Pyrometallurgy is mainly to reduce and smelt cobalt-manganese polymetallic ore at high temperature with coke as a reducing agent, reduce nickel, cobalt, and copper into the alloy, and reduce manganese into the smelting slag, and then further smelt and recover nickel from the alloy , cobalt, copper, and manganese-containing smelting slag to further smelt manganese-ferroalloy, because the cold alloy and slag produced by reduction smelting are hard, the subsequent crushing and grinding are difficult, the overall energy consumption is high, and the cost is high

Direct wet leaching is to carry out reducing acid leaching under the action of different reducing agents. During reducing acid leaching, not only manganese is leached, but also nickel, cobalt, copper, iron, etc. High, these impurities need to be removed in advance by precipitation, extraction and separation, etc. The purification process is complicated and the cost is also high

Reduction roasting—acid leaching is to leaching the ore after reduction roasting. Although the nickel, cobalt, copper, iron, etc. in the cobalt-manganese polymetallic oxide ore are easily reduced to metal by carbon, carbon monoxide, hydrogen, etc. Roasting at low temperature under low temperature, nickel, cobalt, copper, iron and other reduced metals are difficult to dissociate from the slag phase and aggregate to grow up, and it is difficult to effectively enrich nickel, cobalt, and copper from the reduced calcined sand to obtain nickel cobalt For copper mixed concentrate, it is still necessary to carry out wet leaching of all calcined sand to recover nickel, cobalt, copper and manganese, and the subsequent solution purification and separation process is complicated

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