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Method for recovering copper and nickel from nickel-iron-copper alloy waste

A nickel-iron-copper and copper recovery technology, which is applied in the field of comprehensive utilization of resources, can solve the problems of poor economic performance and low utilization rate, and achieve the effects of low production cost, simple operation, and remarkable energy-saving effect of the process

Active Publication Date: 2014-01-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current utilization method of this alloy waste is to add it as an alloy element additive in the alloy production process after classification, and the utilization rate is low and the economic performance is poor.

Method used

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  • Method for recovering copper and nickel from nickel-iron-copper alloy waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 Shown, this method for reclaiming copper, nickel from nickel-iron-copper alloy scrap, its concrete steps are as follows:

[0025] (1) Oxidation and iron removal: first, heat up the nickel-iron-copper alloy scrap to 1500°C to obtain molten nickel-iron-copper alloy scrap, then add slagging agent to the molten nickel-iron-copper alloy scrap and spray oxidizing gas to maintain this temperature After reacting for 10 minutes, molten metal and slag are obtained. The nickel-iron-copper alloy waste includes the following components in mass percentage: Fe0.5%, Cu80%, Ni19.5%; the slagging agent is SiO 2 , the amount added is 0.5 times the mass of iron in the nickel-iron-copper alloy; the oxidizing gas is air, and the injection pressure is 0.01MPa;

[0026] (2) One-stage electrolytic refining to recover copper: cast the molten metal obtained in step (1) into a soluble anode, then use the soluble anode plate as the anode, the stainless steel plate as the cathode, ...

Embodiment 2

[0034] Such as figure 1 Shown, this method for reclaiming copper, nickel from nickel-iron-copper alloy scrap, its concrete steps are as follows:

[0035] (1) Oxidation and iron removal: firstly, the nickel-iron-copper alloy scrap is heated to 1650°C to obtain molten nickel-iron-copper alloy scrap, then a slagging agent is added to the molten nickel-iron-copper alloy scrap and oxidizing gas is sprayed to maintain the temperature After reacting for 120 minutes, molten metal and slag were obtained, in which the nickel-iron-copper alloy scrap included the following components in mass percentage: Fe20%, Cu60%, Ni20%; the slagging agent was SiO with a mass ratio of 1:1 2 Mixed with blast furnace slag, the amount added is 2.5 times the mass of iron in the nickel-iron-copper alloy; the oxidizing gas is oxygen-enriched air, and the injection pressure is 0.8MPa;

[0036] (2) One-stage electrolytic refining to recover copper: cast the molten metal obtained in step (1) into a soluble ano...

Embodiment 3

[0044] Such as figure 1 Shown, this method for reclaiming copper, nickel from nickel-iron-copper alloy scrap, its concrete steps are as follows:

[0045] (1) Oxidation and iron removal: firstly, the nickel-iron-copper alloy scrap is heated to 1600°C to obtain molten nickel-iron-copper alloy scrap, then a slagging agent is added to the molten nickel-iron-copper alloy scrap and oxidizing gas is sprayed to maintain the temperature After reacting for 80 minutes, molten metal and slag were obtained, wherein the nickel-iron-copper alloy waste material included the following components in mass percent: Fe19%, Cu78%, Ni3%; the slagging agent was blast furnace slag, and the amount added was the mass of iron in the nickel-iron-copper alloy 1.5 times; the oxidizing gas is oxygen, and the injection pressure is 0.5MPa;

[0046] (2) One-stage electrolytic refining to recover copper: cast the molten metal obtained in step (1) into a soluble anode, then use the soluble anode plate as the ano...

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Abstract

The invention relates to a method for recovering copper and nickel from nickel-iron-copper alloy waste, belonging to the technical field of resource comprehensive utilization. The method comprises the following steps: oxidation for iron removal: heating the nickel-iron-copper alloy waste to obtain molten-state nickel-iron-copper alloy waste, then adding a slag former, and spraying oxidation gas to obtain molten metal and slag; first-stage electrolytic refining to recover copper: casting the obtained molten metal into a soluble anode, and then electrolyzing by taking a soluble anode plate as an anode, a stainless steel plate as a cathode and copper sulfate as electrolyte to obtain copper on the cathode; second-stage electrolytic refining to recover nickel: heating the electrolyte after the electrolytic refining to remove iron and copper and then feeding into a nickel electrolytic tank as the electrolyte for recovering nickel, and electrolyzing by taking an insoluble titanium plate as an anode and a stainless steel plate as a cathode to obtain nickel on the cathode. According to the method provided by the invention, the three processes of alloy structure damage, anode plate casting and oxidation for iron removal are coupled together, so that the energy saving effect of the process is remarkable.

Description

technical field [0001] The invention relates to a method for recovering copper and nickel from nickel-iron-copper alloy waste, and belongs to the technical field of comprehensive utilization of resources. Background technique [0002] China's nickel supply consists of two parts, one part is the supply of newly produced nickel concentrate, which accounts for 72.9% of the total nickel supply, and the other part comes from secondary nickel, accounting for 27.1%. With the development of economic construction and steel industry, nickel's The demand is constantly increasing. After China's nickel consumption is expected to reach 400,000 tons per year in 2010, China will become the world's largest nickel consumer. In 2010, the basic reserves of nickel metal in China were only about 2.3 million tons. From 2010 to 2013, there was no significant progress in China's nickel ore exploration. If consumption continues like this, China's nickel ore resources will gradually be exhausted in 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C1/12C25C1/08C22B9/16
CPCY02P10/20
Inventor 王华李磊谢晓峰邱在军廖彬胡建杭魏永刚
Owner KUNMING UNIV OF SCI & TECH
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