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A kind of metal nickel purification method containing volatile bi element

A purification method and metal nickel technology, applied in the field of nickel metal, can solve the problems of inapplicability to small batch recovery, unfavorable environmental protection, etc., and achieve the effect of good application prospect and simple method.

Active Publication Date: 2020-07-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to efficiently prepare high-purity Ni metal, avoiding the shortcomings of the existing high-purity Ni metal preparation technology that is unfavorable to environmental protection and not suitable for small batch recovery

Method used

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  • A kind of metal nickel purification method containing volatile bi element
  • A kind of metal nickel purification method containing volatile bi element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Use Ni(Bi) alloy scraps containing 3% Bi on electrical components and magnetic conversion devices as raw materials, and the Bi content is measured by a three-dimensional atom probe (see figure 1 ).

[0035] (2) The Ni(Bi) alloy scrap was placed in deionized water for ultrasonic cleaning for 5 minutes.

[0036] (3) The cleaned Ni(Bi) alloy scraps are dried in a constant temperature drying oven at a temperature of 90° C. for 2 hours.

[0037] (4) Put the Ni(Bi) alloy scrap into the vacuum heat treatment device, and pump the vacuum to 1×10 -2 Pa.

[0038] (5) Raise the temperature of the vacuum heat treatment device to 300°C for 1 hour, and keep the vacuum degree unchanged (in fact, the heating process will cause the vacuum degree to decrease slightly, but the vacuum degree can be restored to the set value within 5 minutes after the temperature is stabilized).

[0039] (6) Adopt furnace cooling to cool down and keep the degree of vacuum unchanged, so that Bi on the ...

Embodiment 2

[0043](1) The Ni(Bi) alloy scrap containing 0.5% of Bi is used as the raw material.

[0044] (2) The Ni(Bi) alloy scrap was placed in deionized water for ultrasonic cleaning for 5 minutes.

[0045] (3) The cleaned Ni(Bi) alloy scraps are dried in a constant temperature drying oven at a temperature of 90° C. for 2 hours.

[0046] (4) Put the Ni(Bi) alloy scrap into the vacuum heat treatment device, and pump the vacuum to 5×10 -2 Pa.

[0047] (5) Raise the temperature of the vacuum heat treatment device to 360°C for 5 hours, and keep the vacuum degree unchanged (in fact, the temperature rise process will cause the vacuum degree to decrease slightly, but the vacuum degree can be restored to the set value within 5 minutes after the temperature is stabilized).

[0048] (6) Cool down the furnace and keep the vacuum constant, so that the Bi on the surface is further volatilized.

[0049] (7) When the temperature drops to 80°C, the vacuum system is closed, and the purified metal Ni...

Embodiment 3

[0052] (1) The Ni(Bi) alloy scrap containing 0.1% of Bi is used as the raw material.

[0053] (2) The Ni(Bi) alloy scrap was placed in deionized water for ultrasonic cleaning for 5 minutes.

[0054] (3) The cleaned Ni(Bi) alloy scraps are dried in a constant temperature drying oven at a temperature of 90° C. for 2 hours.

[0055] (4) Put the Ni(Bi) alloy scrap into the vacuum heat treatment device, and pump the vacuum to 1×10 -3 Pa.

[0056] (5) Raise the temperature of the vacuum heat treatment device to 400°C for 10 hours, and keep the vacuum degree unchanged (in fact, the heating process will cause the vacuum degree to decrease slightly, but the vacuum degree can be restored to the set value within 10 minutes after the temperature is stabilized).

[0057] (6) Cool down the furnace and keep the vacuum constant, so that the Bi on the surface is further volatilized.

[0058] (7) When the temperature drops to 80°C, the vacuum system is closed, and the purified metal Ni is ta...

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Abstract

The invention belongs to the field of nickel metals, and relates to a metal nickel purification method containing volatile Bi elements. According to an Ni (Bi) alloy containing volatile elements, theNi (Bi) alloy is washed by high-speed water flow or ultrasonic cleaning, the Ni (Bi) alloy is dried, and attached pollutants are removed; the Ni (Bi) alloy is subject to isothermal heat treatment at 200 DEG C-420 DEG C for 1-10 hours in a vacuum environment with the temperature of 1*10<-1>~5*10<-3>Pa, and finally 5N high-purity Ni metal is obtained. The content of Bi in the high-purity Ni metal prepared by the method is lower than 10 ppm, and is significantly higher than the purification effect of ordinary purification technology, and the method is simple and convenient, free of obvious environmental pollution and good in application prospect.

Description

technical field [0001] The invention belongs to the field of nickel metal, and relates to a preparation method of high-purity metal Ni, in particular to a purification process of Bi-containing metal Ni. Background technique [0002] The purity of a metal material is a key indicator to measure its performance. Even if it contains a very small amount of impurity elements (such as P, S, Bi in ppm), it will have a great impact on tensile properties, impact properties, fatigue properties, etc. impact, thereby severely degrading material quality and grade. Recently, literature (Scripta Mater., 2011; 65[5]: 428; Mater. Des., 2012; 34[1]: 155; Scripta Mater., 2013, 68[10]: 825) reported that 25ppm of impurities Bi The content can reduce the mean high temperature tensile plasticity of pure Ni from 81.7% to 25.4%. At the same time, Ni(Bi) alloys have excellent electrical conductivity and magnetic properties, and are widely used in electrical components and magnetic conversion device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/06C22B9/04
CPCC22B9/04C22B23/06
Inventor 郑磊孟晔孟方亮汪博
Owner UNIV OF SCI & TECH BEIJING