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Method for producing granular rare earth chloride

A technology of rare earth chloride and production method, applied in chemical instruments and methods, rare earth metal compounds, rare earth metal halides, etc., can solve the problem of irregular sharp edges and corners of rare earth chloride, unfavorable long-term storage and transportation, and the need for rare earth chloride. crushing and other problems, to achieve the effect of continuous industrial production, long cooling waiting time and high labor intensity

Inactive Publication Date: 2018-08-17
鲍永平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a production method of granular rare earth chloride, which solves the problem that the whole piece of rare earth chloride needs to be broken in the current production process, the production cycle is long, and the broken rare earth chloride has irregular sharp edges and corners, which are easy to scratch the packaging bag The inner lining material bag is not conducive to long-term storage and transportation and other issues

Method used

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  • Method for producing granular rare earth chloride

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Embodiment 1

[0019] A method for producing granular rare earth chloride. The rare earth chloride used is a cerium chloride solution with a mass concentration of 280g / l. Place 3 liters of cerium chloride solution in a 5 liter glass, adjust the pH to 3.5, and heat it on a heating furnace Evaporate and concentrate to a rare earth content of about 43-45% (based on REO). Stir while cooling, the stirring speed is controlled at 50 r / min, the stirring time is 10 min, the temperature is lowered to room temperature, the rare earth chloride is completely cooled and crystallized, and the particle size of the granular solid cerium chloride is mostly less than 5 mm and a small amount of adhesion.

Embodiment 2

[0021] A method for producing granular rare earth chloride, the rare earth chloride used is a lanthanum cerium chloride solution with a mass concentration of 283g / l, taking 3m 3 The lanthanum cerium chloride solution is placed in a reduced pressure concentration reactor, the pH value is adjusted to 3.5, the heating temperature is controlled at 100-110 ℃, the pressure is 40-50 Kpa, the water in the lanthanum cerium chloride solution is evaporated, and the rare earth content is concentrated to about 43 Between -45% (based on REO). Then release the lanthanum and cerium chloride solution in 3 times, place it in the crystallizer, start the stirring power while adding the lanthanum and cerium chloride solution, and let the scraping paddle perform continuous stirring, and the stirring speed is controlled at 30-50r / min. While adding high-temperature rare earth chloride, cooling water is introduced into the cooling jacket of the crystallizer. According to the outside room temperature, t...

Embodiment 3

[0023] Rare earth chloride cooling crystallizer, such as figure 1 It is equipped with a cooling device and a device for destroying the solidification and growth of crystal particles. The device for destroying the solidification and growth of crystal particles is a mechanical rotating stirring device. In the laboratory, a small amount of rare earth chloride is cooled and crystallized, and only continuous stirring is required to obtain Granular rare earth chloride. In the continuous industrial production, due to the large amount of rare earth chloride, a large amount of heat needs to be released, which requires a cooling device and a special stirrer.

[0024] The industrial cooling crystallizer is composed of heat transfer jacket 1, inner liner 2, rotating shaft 6, scraping stirring paddle 8, bracket 11, stirring power device 13, etc., rotating shaft 6 is fixed on the bracket, and rotating shaft 6 is fixed with scraping and stirring The paddle 13, the rotating shaft 6 and the stir...

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Abstract

The invention discloses a method for producing granular rare earth chloride, and belongs to the field of production of rare earth products, and the method mainly comprises the steps such as adjustingof the pH value of a rare earth chloride solution, concentrating and cooling crystallization of the rare earth chloride solution under reduced pressure. The high temperature rare earth chloride solution is crystallized in a cooling crystallizer which has the function of cooling and destroying solidification and growth of the crystal. The cooling crystallizer comprises a heat transfer jacket, a liner, a rotating shaft, a scraping stirring paddle, a bracket, a tiltable power device, a stirring power device, and the like, and the cooling crystallizer rapidly cools the rare earth chloride throughthe heat transfer jacket and jet air. The coagulation of crystal particles is destroyed by the stirring action of the scraping stirring paddle. The method solves the following problems in the production process in prior art: the rare earth chloride which is condensed as a whole must be crushed; in the cooling crystallization process the rare earth chloride is exposed to the outside air for a longtime, the product is easily contaminated; the production cycle is long; the crushed rare earth chloride has irregular sharp corners, and is not conducive to long-term preservation. The continuous production of the granular rare earth chloride is realized.

Description

Technical field [0001] The invention relates to a method for producing solid rare earth chloride by concentrated crystallization of rare earth chloride in a rare earth smelting and separation process, and belongs to the field of rare earth product production. Background technique [0002] Rare earth chloride is widely used in industry, especially in the petroleum catalytic cracking catalyst industry. A large amount of rare earth chloride is required. Rare earth chloride is extremely hygroscopic at room temperature and is easy to deliquesce. The processes of reduced pressure concentration, natural cooling and crystallization, and artificial crushing have been used in industrial production. There are problems in backward production processes, low labor productivity, and products that are easily contaminated. [0003] One link in the current industrial production of rare earth chloride is concentration, cooling and crystallization, that is, the mixed rare earth chloride solution after...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B01D9/02
CPCB01D9/0009C01F17/271
Inventor 不公告发明人
Owner 鲍永平
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