A kind of preparation method of ammonium paratungstate composite powder containing rare earth

A technology of ammonium paratungstate and ammonium tungstate, applied in the field of hard alloy material preparation, can solve the problem of uneven distribution of rare earth, and achieve the effect of refining APT particle size, good dispersibility and improving dispersibility

Active Publication Date: 2021-05-14
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of uneven distribution of rare earth in rare earth cemented carbide and provide a kind of APT / rare earth salt composite powder in which rare earth is fully and uniformly dispersed, the present invention proposes a preparation method of rare earth-containing ammonium paratungstate composite powder

Method used

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  • A kind of preparation method of ammonium paratungstate composite powder containing rare earth
  • A kind of preparation method of ammonium paratungstate composite powder containing rare earth
  • A kind of preparation method of ammonium paratungstate composite powder containing rare earth

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take the APT workshop of a factory and use the soda high-pressure leaching method to process it, and then produce the second-stage liquid ammonium tungstate solution 300ml after the impurity removal by the ion exchange method in a stirring pot, WO 4 2- The concentration is 260g / L, and the temperature is kept not higher than 40°C.

[0027] Weigh 0.05 g of yttrium nitrate, add it into a beaker filled with 5 ml of deionized water, and stir with a glass rod until the yttrium nitrate is completely dissolved. While stirring the ammonium tungstate solution at a speed of 60rad / min, slowly add the yttrium nitrate solution into the ammonium tungstate solution, keep stirring for 5min, and keep the temperature not higher than 40°C to obtain the ammonium tungstate / rare earth salt precursor composite solution .

[0028] Transfer the precursor composite solution into a magnetic stirrer and heat it to 80°C for evaporation and crystallization. The magnetic stirring rotor rotates at a ...

example 2

[0030] Take the APT workshop of a factory and use the soda high-pressure leaching method to process it, and then produce the second-stage liquid ammonium tungstate solution 300ml after the impurity removal by the ion exchange method in a stirring pot, WO 4 2- The concentration is 260g / L, and the temperature is kept not higher than 40°C.

[0031] Weigh 2.19 g of yttrium nitrate, add it into a beaker filled with 5 ml of deionized water, and stir with a glass rod until the yttrium nitrate is completely dissolved. While stirring the ammonium tungstate solution at a speed of 60rad / min, slowly add the yttrium nitrate solution into the ammonium tungstate solution, keep stirring for 5min, and keep the temperature not higher than 40°C to obtain the ammonium tungstate / rare earth salt precursor composite solution .

[0032] Transfer the precursor composite solution into a magnetic stirrer and heat it to 80°C for evaporation and crystallization. The magnetic stirring rotor rotates at a ...

example 3

[0034]Take the APT workshop of a factory and use the soda high-pressure leaching method to process it, and then produce the second-stage liquid ammonium tungstate solution 300ml after the impurity removal by the ion exchange method in a stirring pot, WO 4 2- The concentration is 260g / L, and the temperature is kept not higher than 40°C.

[0035] Weigh 5.55 g of yttrium nitrate, add it into a beaker filled with 5 ml of deionized water, and stir with a glass rod until the yttrium nitrate is completely dissolved. While stirring the ammonium tungstate solution at a speed of 60rad / min, slowly add the yttrium nitrate solution into the ammonium tungstate solution, keep stirring for 5min, and keep the temperature not higher than 40°C to obtain the ammonium tungstate / rare earth salt precursor composite solution .

[0036] Transfer the precursor composite solution into a magnetic stirrer and heat it to 80°C for evaporation and crystallization. The magnetic stirring rotor rotates at a s...

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Abstract

A method for preparing a rare earth-containing ammonium paratungstate composite powder, which includes alkali treatment or acid treatment to obtain an ammonium tungstate solution, impurity removal treatment of the ammonium tungstate solution, and evaporative crystallization, and the method adds rare earth elements in the form of a rare earth salt solution. into a pure ammonium tungstate solution to obtain an ammonium paratungstate / rare earth salt composite powder in which rare earth elements are fully and uniformly distributed. The method steps of the invention include: (1) preparing an ammonium tungstate solution; (2) preparing a homogeneous and stable rare earth salt solution; (3) preparing a precursor composite solution; (4) evaporating and crystallizing to obtain a rare earth-containing ammonium paratungstate composite powder. In the invention, the rare earth salt solution is directly added to the ammonium tungstate solution of the intermediate product for preparing APT, and then the ammonium paratungstate / rare earth salt composite powder is obtained by evaporation and crystallization, and the ammonium paratungstate / rare earth salt can be realized by slightly modifying the existing industrialized APT production line. Mass production of composite powders.

Description

technical field [0001] The invention relates to a method for preparing rare earth-containing ammonium paratungstate composite powder, which belongs to the technical field of hard alloy material preparation. Background technique [0002] Cemented carbide has high hardness, strength, wear resistance and corrosion resistance, and is known as "industrial teeth". It can not only be used in various knives, abrasive tools, precision bearings and cylinder linings, but also widely used in Oil drilling, mining tools, electronic communications and other fields. With the rapid development of sophisticated weapons, the rise of high-tech equipment manufacturing, the rapid progress of cutting-edge science and technology, and the rapid development of nuclear energy technology, the requirements for the comprehensive performance and quality stability of cemented carbide products have been greatly increased. Rare earth elements have a series of functions such as refining grains, purifying int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00C01F17/276C01F17/271C01F17/10
CPCC01G41/006C01P2002/72C01P2002/85C01P2004/80C01F17/276
Inventor 刘觐杨艳玲易志强谭敦强廖先金陆磊付远
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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