Preparation method of magnesium-rare earth alloy electrolysis raw material

A technology for magnesium rare earth alloy and raw material, which is applied in the field of preparing magnesium rare earth alloy electrolytic raw material, and achieves the effects of reducing environmental pollution, low dehydration temperature and good dehydration effect.

Active Publication Date: 2018-01-19
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Problems solved by technology

[0015] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a kind of preparation method of magnesium rare earth alloy electrolytic raw material, and this preparation method process is simple and easy, and dehydration efficiency is high, and preparation temperatu

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  • Preparation method of magnesium-rare earth alloy electrolysis raw material
  • Preparation method of magnesium-rare earth alloy electrolysis raw material

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Example Embodiment

[0043] The following combination figure 2 The preparation method of the magnesium rare earth alloy electrolytic raw material of the present invention will be described in detail. The preparation method of the magnesium rare earth alloy electrolytic raw material according to the present invention includes the following steps:

[0044] Step S1: Mixing bischofite and the first hydrated rare earth chloride to obtain dehydration raw material.

[0045] Specifically, the first hydrated rare earth chloride may be selected from at least one of lanthanum chloride hydrate, praseodymium chloride hydrate, cerium chloride hydrate, and neodymium chloride hydrate; more specifically, lanthanum chloride hydrate may be selected from At least one of lanthanum chloride heptahydrate, lanthanum chloride trihydrate, and lanthanum chloride monohydrate, praseodymium chloride hydrate may be selected from at least one of praseodymium chloride heptahydrate, praseodymium chloride trihydrate, and praseodymium c...

Example Embodiment

[0078] Example 1

[0079] In Example 1, the raw material for dehydration is a mixture of bischofite and lanthanum chloride heptahydrate with a mass ratio of 1:1, the feed rate is controlled to 100 kg / h, one-stage fluidized dehydration, two-stage fluidized dehydration, and three The temperature of the stage fluidized dehydration is 170℃, 240℃ and 270℃ respectively. At the same time, the time of the first stage fluidized dehydration, the second stage fluidized dehydration and the third stage fluidized dehydration are all 20min, and finally the magnesium rare earth alloy electrolytic raw material product is obtained. .

[0080] The magnesium rare earth alloy electrolytic raw material product obtained in this example was analyzed, and the water-insoluble matter content was 9.0% (wt%); the water content was 11.1% (wt%) detected by Karl Fischer moisture analyzer; XRD analysis shows that the main components of the product are anhydrous magnesium chloride and anhydrous lanthanum chloride....

Example Embodiment

[0081] Example 2

[0082] In Example 2, the raw material for dehydration is a mixture of bischofite and neodymium chloride hexahydrate with a mass ratio of 2:1, and the feed rate is controlled to 100 kg / h, one-stage fluidized dehydration, two-stage fluidized dehydration, and three-stage The fluidized dehydration temperatures were 170°C, 245°C, and 265°C, respectively. At the same time, the first-stage fluidized dehydration, the second-stage fluidized dehydration, and the third-stage fluidized dehydration took 20 minutes to obtain the magnesium rare earth alloy electrolytic raw material products.

[0083] The magnesium rare earth alloy electrolytic raw material product obtained in this example was analyzed, and the water-insoluble content was 8.0% (wt%); the water content was 7.0% (wt%) detected by the Karl Fischer moisture analyzer; XRD analysis shows that the main components of the product are anhydrous magnesium chloride and anhydrous neodymium chloride.

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Abstract

The invention discloses a preparation method of magnesium-rare earth alloy electrolysis raw material. The preparation method comprises the following steps: S1, bischofite and first hydrated rare-earthchloride are mixed, and then dehydrated raw material is obtained; S2, first-stage fluidization dehydration is carried out on the dehydrated raw material at the temperature of 170-180 DEG C, and thena first-stage dehydrated crude product is obtained; S3, second-stage fluidization dehydration is carried out on the first-stage dehydrated crude product at the temperature of 230-250 DEG C, and then asecond-stage dehydrated crude product is obtained; and S4, third-stage fluidization dehydration is carried out on the second-stage dehydrated crude product at the temperature of 260-280 DEG C and inthe hydrogen chloride gas atmosphere, so that the magnesium-rare earth alloy electrolysis raw material is obtained. According to the preparation method of the magnesium-rare earth alloy electrolysis raw material, staged fluidization dehydration on the bischofite and the hydrated rare-earth chloride is carried out, the hydrogen chloride protective gas atmosphere is provided, so that a hydrolysis effect is effectively inhibited in the process that an intermediate product is dehydrated to form the magnesium-rare earth alloy electrolysis raw material, and product purity is greatly improved; and the preparation method is low in dehydration temperature, low in preparation cost and good in dehydration effect.

Description

technical field [0001] The invention belongs to the technical field of rare earth material preparation, and specifically relates to a method for preparing magnesium rare earth alloy electrolytic raw materials by using bischofite and hydrated rare earth chloride as raw materials. Background technique [0002] Magnesium and magnesium alloys have many excellent processing and use properties, and the production technology and application research have attracted more and more attention. It is widely used in aerospace, automobile, electronics, communication instruments and other fields, and is known as "green engineering metal structure material in the 21st century". At present, the electrolysis of anhydrous magnesium chloride to prepare metal magnesium is the best process route for the development of metal magnesium industry. [0003] At present, there are mainly the following methods for producing anhydrous magnesium chloride for electrolysis: [0004] (1) Hydrogen chloride ga...

Claims

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Application Information

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IPC IPC(8): C25C3/36C22B26/22C22B59/00
Inventor 韩继龙孙庆国都永生戈桦
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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