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

A processing method and multi-metal technology, applied in the field of metallurgy and chemical industry, can solve the problems of high safety and environmental protection risks, unsatisfactory recovery rate of valence metals, harsh leaching conditions, etc., and achieve high furnace body use efficiency, significant environmental protection advantages, and efficient utilization. Effect

Active Publication Date: 2015-11-04
CHANGSHA RES INST OF MINING & METALLURGY
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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.

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0033] a kind of like figure 1 The processing method of the multi-metal alloy waste material containing nickel / cobalt of the present invention shown, may further comprise the steps:

[0034] (1) Melting the multi-metal alloy: the multi-metal alloy waste in this embodiment comes from the waste catalyst pyrometallurgy, and its alloy composition is Ni 19.12%, Co 2.50%, Fe 58.10%, Mo 8.72%, W 1.08%, V 2.30%; A 50kg-level medium-frequency induction furnace was used to carry out the blowing slagging test, the amount of multi-metal alloy waste added was 35kg, and the melting temperature was 1500°C;

[0035] (2) Add manganese-containing material and silicon-containing material, the manganese-containing material in the present embodiment adopts metal manganese (Mn content 99%), and one-time addition is 5.0kg, and silicon-containing material adopts silica (SiO 2 Content 98%), one-time addition 9.32kg; at the same time, air is introduced into the interior and surface of the alloy melt f...

Embodiment 2

[0041] a kind of like figure 1 The processing method of the multi-metal alloy waste material containing nickel / cobalt of the present invention shown, may further comprise the steps:

[0042] (1) Melting the multi-metal alloy scrap: The multi-metal alloy scrap in this embodiment comes from waste superalloy, and its alloy composition is Ni 62.72%, Co 8.54%, Fe 0.64%, Mo 1.65%, W 7.64%, Al 5.87 %, Re 2.42%, Nb 0.51%, Cr 4.77%; 1000kg intermediate frequency induction furnace is used for blowing and slagging, the amount of multi-metal alloy waste added is 700kg, and the melting temperature is 1700°C;

[0043] (2) Add manganese-containing material and silicon-containing material, the manganese-containing material in the present embodiment adopts pyrolusite (Mn content 39.86%, SiO 2 13.33%), the one-time addition is 40kg, and the silicon-containing material adopts silica (SiO 2 content 98%), the amount of one addition is 30.15kg; at the same time, a mixed gas of air and oxygen is i...

Embodiment 3

[0050] a kind of like figure 1 The processing method of the multi-metal alloy waste material containing nickel / cobalt of the present invention shown, may further comprise the steps:

[0051] (1) Melting the multi-metal alloy waste material: the multi-metal alloy waste material composition of the present embodiment is Ni 65.80%, Co 6.72%, Mo 1.65%, W 9.00%, Al 6.53%, Re 2.23%, Ta 4.10%; Adopt 1000kg The slag is blown and slag-made in a medium-frequency induction furnace, the amount of multi-metal alloy waste added is 700kg, and the melting temperature is 1700°C;

[0052] (2) Add manganese-containing material and silicon-containing material, the manganese-containing material in the present embodiment adopts metal manganese (Mn content 99%) and manganese dioxide powder (MnO 2 content 95%) mixture (the mass ratio of the two is 3:7), the amount of one addition is 30kg, and the silicon-containing material adopts a mixture of manganese-silicon alloy (Mn 68%, Si 18%) and silica (SiO ...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/34C22B34/36C22B34/22
CPCY02P10/20
Inventor 肖松文潘炳毛拥军沈裕军谢美求任国兴郑铁铮陈坚王奉刚钟山夏星
Owner CHANGSHA RES INST OF MINING & METALLURGY
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