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

A nickel-iron-copper and copper recovery technology, applied in the field of comprehensive utilization of resources, can solve the problems of low utilization rate and poor economic performance, and achieve the effects of low production cost, simple operation and strong universality

Active Publication Date: 2015-01-28
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, and belongs to the technical field of comprehensive utilization of resources. First, remove iron by oxidation: heat the nickel-iron-copper alloy waste to obtain molten nickel-iron-copper alloy waste, then add a slagging agent and spray oxidizing gas to obtain molten metal and slag; then, a stage of electrolytic refining is used to recover copper: the nickel-iron-copper alloy waste obtained in the above steps is The molten metal is cast into a soluble anode, and then the soluble anode plate is used as the anode, the stainless steel plate is used as the cathode, and copper sulfate is used as the electrolyte. After electrolysis, copper can be prepared on the cathode; finally, the second stage of electrolytic refining is used to recover nickel: the above steps are The electrolytically refined electrolyte is heated to remove iron and copper and then sent to the nickel electrolytic cell as the electrolyte for nickel recovery. The insoluble titanium plate is used as the anode and the stainless steel plate is used as the cathode. After electrolysis, nickel can be prepared on the cathode. The invention effectively couples the three processes of alloy structure destruction, anode plate casting and oxidation iron removal into one process, and the process energy saving effect 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 Patents(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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