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A kind of method that utilizes silver-nickel alloy scrap to prepare silver-nickel oxide

A technology of silver-nickel alloy and silver-nickel oxide, which is applied in the field of preparing silver-nickel oxide electrical contact materials, can solve the problems of large power consumption, economy, and environmental protection are not the best choice, so as to improve the anti-burning performance and eliminate Environmental pollution, low loss effect

Active Publication Date: 2018-04-03
佛山市诺普材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the existing technologies, no proprietary recycling technology for silver-nickel waste was found. Existing recycling technologies have only done a lot of research on the recovery of silver in scraps, and the rest of the metals, such as copper and nickel, have not been considered for recycling. Methods It can be summed up as acid recovery and electrolytic recovery. Acid recovery needs to use a large amount of nitric acid to dissolve silver alloys, while electrolytic recovery requires a lot of electric energy. The two methods are not the best choice in terms of economy and environmental protection. It is obviously more economical and environmentally friendly to recycle a large amount of silver and nickel scraps

Method used

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  • A kind of method that utilizes silver-nickel alloy scrap to prepare silver-nickel oxide
  • A kind of method that utilizes silver-nickel alloy scrap to prepare silver-nickel oxide
  • A kind of method that utilizes silver-nickel alloy scrap to prepare silver-nickel oxide

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Embodiment 1

[0032] A method for preparing silver-nickel oxide from silver-nickel alloy waste, comprising the steps of:

[0033] Step 1: Weigh the bulk waste produced during the production of silver-nickel alloy electrical contact materials according to the content ratio of silver-nickel, and place them for later use, such as AgNi(10), AgNi(15), AgNi(20), AgNi(25 ), AgNi(30), AgNi(40); wherein AgNi(10) nickel content is 10%, AgNi(15) nickel content is 15%, and so on. This example is implemented according to AgNi(10), wherein the AgNi(10) has a mass fraction of silver: 90%, and a mass fraction of nickel: 10%.

[0034] Step 2: Pressing into an alloy ingot with a diameter of 100mm under a pressure of 200MPa;

[0035] Step 3: Sinter the pressed alloy ingot in a hydrogen protective atmosphere, the sintering temperature is 850 degrees Celsius, the holding time is 1 hour, and it is released after cooling to room temperature;

[0036] Step 4: Heating the sintered alloy ingot to 800-880 degrees C...

Embodiment 2

[0043] A method for preparing silver-nickel oxide from silver-nickel alloy waste, comprising the steps of:

[0044] Step 1: Weigh the bulk waste produced during the production of silver-nickel alloy electrical contact materials according to the content ratio of silver-nickel, and place them for later use, such as AgNi(10), AgNi(15), AgNi(20), AgNi(25 ), AgNi(30), AgNi(40); wherein AgNi(10) nickel content is 10%, AgNi(15) nickel content is 15%, and so on. This example is implemented according to AgNi(15), wherein the mass fraction of silver in AgNi(15) is 85%, and the mass fraction of nickel is 15%. .

[0045] Step 2: pressing under 200MPa pressure to form an alloy ingot with a diameter of 100mm.

[0046] Step 3: The pressed alloy ingot is sintered in a hydrogen protective atmosphere, the sintering temperature is 850 degrees Celsius, the holding time is 1 hour, and it is released after cooling to room temperature.

[0047]Step 4: Heating the sintered alloy ingot to 800-880 d...

Embodiment 3

[0054] A method for preparing silver-nickel oxide from silver-nickel alloy waste, comprising the steps of:

[0055] Step 1: Weigh the bulk waste produced during the production of silver-nickel alloy electrical contact materials according to the content ratio of silver-nickel, and place them for later use, such as AgNi(10), AgNi(15), AgNi(20), AgNi(25 ), AgNi(30), AgNi(40); wherein AgNi(10) nickel content is 10%, AgNi(15) nickel content is 15%, and so on. This example is implemented according to AgNi(20), wherein the AgNi(20) has a mass fraction of silver: 80%, and a mass fraction of nickel: 20%.

[0056] Step 2: pressing under 200MPa pressure to form an alloy ingot with a diameter of 100mm.

[0057] Step 3: The pressed alloy ingot is sintered in a hydrogen protective atmosphere, the sintering temperature is 850 degrees Celsius, the holding time is 1 hour, and it is released after cooling to room temperature.

[0058] Step 4: Heating the sintered alloy ingot to 800-880 degree...

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Abstract

The invention discloses a method for preparing silver nickel oxides by silver-nickel alloy waste materials. The method comprises the following steps of (1) respectively weighing blocky waste materials generated in the production process of silver-nickel alloy electric contact materials according to the silver and nickel content proportion; (2) pressing waste materials into alloy ingots; (3) sintering the alloy ingots; performing heat insulation; cooling the materials to the room temperature; then, discharging the materials out of the furnace; (4) heating the alloy ingots; performing heat insulation and extrusion in an extrusion form of wire materials; (5) drawing the wire materials, wherein annealing is not performed in the middle process; (6) charging the wire materials into an oxidation furnace in a whole roll to perform internal oxidization; (7) performing shearing crushing on the wire materials; (8) performing heating and heat insulation on the materials in the air; performing extrusion in an extrusion form of wire materials; (9) drawing the wire materials to obtain silver nickel oxide electric contact material finished products. The method has the advantages that the loss in the recovery process is low; the recovery rate is high; in addition, the silver-nickel waste materials are directly converted into silver nickel oxide materials capable of being used in the recovery process.

Description

technical field [0001] The invention relates to the technical field of metal-based composite materials, and more specifically, relates to a method for preparing silver-nickel oxide electrical contact materials from silver-nickel alloy waste. Background technique [0002] With the promulgation and implementation of the European Union's "RoHs" directive in 2002 and the implementation of China's new environmental protection directive, the use of toxic silver cadmium oxide (AgcdO) electrical contact materials has been increasingly restricted. In recent years, as a substitute for AgcdO materials The market demand for non-toxic and environmentally friendly silver-nickel (AgNi) materials is growing rapidly, and this market has become an important field of electrical contact materials. In order to reduce production costs, the corners of silver-nickel (AgNi) electrical contact materials produced during the production process Waste treatment technology has also become a hot research t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C5/06C22C32/00C22F1/14C22F1/02
CPCC22C1/05C22C5/06C22C32/0021C22F1/02C22F1/14
Inventor 谢云王乃千王永业凌均谷
Owner 佛山市诺普材料科技有限公司
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