Method for purifying and preparing beryllium hydroxide from beryllium fluoride-containing mixture

A technology containing beryllium fluoride and beryllium hydroxide, which is applied in the field of metal beryllium metallurgy, can solve the problems of high equipment investment requirements, large reagent volume, and limited purity of beryllium hydroxide, and achieve improved recovery rate, short process, and reduced slag volume. volume effect

Active Publication Date: 2021-06-22
钢研晟华科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN107641712A discloses a very complicated method of extracting and preparing beryllium hydroxide from beryllium-containing ore. It needs to be roasted by adding quicklime, then leached with acid, then evaporated and concentrated, and then

Method used

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  • Method for purifying and preparing beryllium hydroxide from beryllium fluoride-containing mixture
  • Method for purifying and preparing beryllium hydroxide from beryllium fluoride-containing mixture
  • Method for purifying and preparing beryllium hydroxide from beryllium fluoride-containing mixture

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Embodiment 1

[0068] A specific embodiment of the present invention discloses a method for purifying and preparing beryllium hydroxide from a mixture containing beryllium fluoride.

[0069] The main components of the beryllium fluoride-containing mixture used in the present invention are shown in Table 1. process such as figure 1 shown.

[0070] Table 1 The main components / wt% of the mixture containing beryllium fluoride

[0071] BeF 2

AlF 3

FeF 3

h 2 SiF 6

Crystal water and HF 17.5 39.8 10.4 1.5 remaining

[0072] Step 1. Use a crusher and a ball mill to grind 500 g of the beryllium fluoride-containing mixture to an average particle size of 100 microns.

[0073] Step 2. Add fine powder in the dissolution kettle, dissolve the beryllium fluoride-containing mixture with deionized water, add 100mL water, (the amount of water added is based on the BeF in 100mL water in the final solution) 2 The content of 87.5g is determined, that is, the liq...

Embodiment 2

[0080] A specific embodiment of the present invention discloses a method for purifying and preparing beryllium hydroxide from a mixture containing beryllium fluoride.

[0081] The beryllium fluoride-containing mixture used in the present invention comes from the intermediate product of microwave hydrofluoric acid leaching beryllium ore, and its main components are shown in Table 1. process such as figure 2 shown.

[0082] Step 1. Grinding 500 g of the beryllium fluoride-containing mixture to an average particle size of 50 microns in a crusher and a ball mill.

[0083] Step 2. Add fine powder in the dissolution kettle, dissolve the beryllium fluoride-containing mixture with deionized water, add 62.5mL water, (the amount of water added is based on the BeF in 62.5mL water in the final solution) 2 The content of 87.5g is determined, that is, the liquid-solid ratio of water to the mixed slag powder containing beryllium fluoride is 1:8 in mL / g);

[0084] The temperature of the s...

Embodiment 3

[0090] A specific embodiment of the present invention discloses a method for purifying and preparing beryllium hydroxide from a mixture containing beryllium fluoride.

[0091] The beryllium fluoride-containing mixture used in the present invention comes from the intermediate product of microwave hydrofluoric acid leaching beryllium ore, and its main components are shown in Table 1. process such as figure 2 shown.

[0092] Step 1. Grind 500 g of the beryllium fluoride-containing mixture to an average particle size of 60 microns in a crusher and a ball mill.

[0093] Step 2. Add fine powder in the dissolution kettle, dissolve the beryllium fluoride-containing mixture with deionized water, add 200mL water, (the amount of water added is based on the BeF in 200mL water in the final solution) 2 The content of 87.5g is determined, that is, the liquid-solid ratio of water to the mixed slag powder containing beryllium fluoride is 1:2 in mL / g);

[0094] The temperature of the soluti...

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Abstract

The invention relates to a method for purifying and preparing beryllium hydroxide from a beryllium fluoride-containing mixture, belongs to the technical field of metal beryllium metallurgy, and solves the problems that an existing beryllium hydroxide preparation technology is tedious in process and high in equipment requirement, and the purity of the prepared beryllium hydroxide is low. The method for purifying and preparing beryllium hydroxide from the beryllium fluoride-containing mixture comprises the steps: crushing and ball-milling the beryllium fluoride-containing mixture into beryllium fluoride-containing mixture powder; dissolving the beryllium fluoride-containing mixture powder with water to obtain a beryllium fluoride-containing mixture suspension; carrying out solid-liquid separation on the beryllium fluoride-containing mixture suspension to obtain a first separation solution and residues; adding ammonia water into the first separation solution to adjust the pH value, carrying out primary precipitation, and removing the primary precipitate to obtain a second separation solution; and adding ammonia water into the second separation solution to adjust the pH value, carrying out secondary precipitation, carrying out solid-liquid separation, and drying the obtained solid to obtain beryllium hydroxide. The beryllium hydroxide is prepared by smelting an intermediate product beryllium fluoride-containing mixture from beryllium ore.

Description

technical field [0001] The invention relates to the technical field of metal beryllium metallurgy, in particular to a method for purifying and preparing beryllium hydroxide from a mixture containing beryllium fluoride. Background technique [0002] Beryllium is one of the lightest metal structural materials known, featuring high strength, high modulus of elasticity, and low density. Beryllium also has good thermal shock resistance and thermal diffusivity and a very small coefficient of thermal expansion. Due to the unique properties of beryllium, it has a wide range of applications in many fields. Beryllium is less dense than commonly used aluminum and titanium and four times stronger than steel. Beryllium has strong heat absorption capacity and stable mechanical properties, so it is an ideal metal material element in the aerospace field. [0003] We have proposed a beryllium ore leaching separation process (patent application number 202011120123.0). Under the action of ...

Claims

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Application Information

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IPC IPC(8): C01F3/02
CPCC01F3/02C01P2006/80Y02P10/20
Inventor 郭培民王磊孔令兵赵沛
Owner 钢研晟华科技股份有限公司
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