Method for dressing-smelting combination extracting manganese and comprehensively recovering nickel, cobalt and copper from cobalt-manganese polymetallic oxide ore

Abstract

The invention discloses a method for dressing-smelting combination extracting manganese and comprehensively recovering nickel, cobalt and copper from a cobalt-manganese polymetallic oxide ore. The method includes the steps that the cobalt-manganese polymetallic oxide ore is crushed and ground to obtain fine ore with a particle size of less than 0.25mm; the fine ore, a reducing agent, a metallization aid and water are is mixed and pressed into pellets; the pellets are transferred to a reducing furnace for metallization reduction roasting at 1000-1300 DEG C after dried and pre-heated, and a material after reduction roasting is cooled; the cooled material is crushed, ground, and magnetically separated to obtain nickel cobalt copper mixed concentrate and manganese concentrate; the manganese concentrate is leached with a sulfuric acid solution or manganese electrolytic waste liquid, and manganese leachate and residue are obtained by solid-liquid separation; a vulcanized agent is added intothe manganese leachate for purification to obtain a manganese sulfate solution and metal sulfide; and the manganese sulfate solution is electrolyzed to produce electrolytic manganese or electrolytic manganese dioxide. The method is simple in process, less in post-processing amount, high in recovery rate, low in energy consumption and low in 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 cobalt-manganese polymetallic oxide ore dressing and smelting to extract manganese and comprehensively recover nickel, cobalt and copper. 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 my country's manganese ore resources is that there are more lean ores and less rich ores. The traditional domestic manganese ore resources are mainly manganese carbonate ore, and manganese oxide ore is rarely developed and utilized due to its difficult treatment and complicated process. In recent years, with the reduction of manganese carbonate ore resources...

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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