Method for treating nickel/cobalt-contained multi-metal alloyed scrap

Abstract

A method for treating nickel / cobalt-contained multi-metal alloyed scrap comprises the following steps that the multi-metal alloyed scrap is molten to form alloy melt; at least one kind of nickel metal and cobalt metal is included in the multi-metal alloyed scrap, and Mn and Si are hardly included in the multi-metal alloyed scrap; one or more kinds of tungsten, molybdenum and vanadium are further included in the multi-metal alloyed scrap; manganese-contained materials and silicon-contained materials are added, and meanwhile oxygen-contained gas is pumped in for blowing slagging; obtained formed slag is separated out of the alloy melt; the alloy melt obtained after the formed slag is separated out is atomized into alloy powder; at least 0.5% of Mn elements is included in the alloy powder; acid leaching is carried out on the obtained alloy powder; and the obtained formed slag is leached out through strong alkali, and valuable metal in the formed slag is recycled. The method has the beneficial effects that resources are fully utilized; the utilization rate of raw materials is high; the use efficiency of a furnace is high; cost is low; operation is easy; and energy saving and environmental protection are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to a method for processing multi-metal alloy waste. Background technique [0002] Nickel (cobalt) is a strategic metal with ferromagnetism. It is widely used in the form of alloys to produce stainless steel, high-temperature alloys, magnetic materials, and catalysts. It is used in petrochemical, aerospace, military, and electronics fields. With the continuous increase of demand for nickel and cobalt in modern industry, and the shortage of nickel and cobalt mineral resources, waste catalysts, high-temperature alloys and other alloy wastes produced in the petrochemical industry, aerospace, military industry, and electronics industries have become rare and important materials for nickel and cobalt metals. Secondary resources, and in addition to nickel and cobalt metals, such alloys also contain refractory scattered metals such as tungsten, molybdenum, rhenium, ...

AI Technical Summary

Problems solved by technology

The above-mentioned treatment methods do not require smelting pretreatment of the alloy, and their biggest disadvantage is that none of them can effectively improve the acid / alkali leaching performance of the alloy, resulting in relatively harsh leaching conditions, or the need for pressurization, roasting, or the use of extremely easy Nitric acid, hydrochloric acid, etc. that pollute the environment, resulting in complex process operations, serious environmental pollution, and poor economic benefits

The deficiencies of the aforementioned existing methods mainly lie in: one, the recovery rate of valuable metals is not ideal, and it is difficult to effectively recover high-purity Ni and Co resources by magnetic separation; Difference

[0005] Based on the above, although there are various methods for recycling valuable metals such as nickel and cobalt in waste nickel (cobalt) alloy materials, there are unreasonable parts in them, such as unsatisfactory recovery rate of valuable metals, harsh operating conditions, or poor economic efficiency. , the risk of safety and environmental protection is high. Therefore, it is urgent to develop a treatment process with simple process, good comprehensive recovery effect, safety and environmental protection in this field.

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