A kind of method for purifying and preparing beryllium hydroxide from mixture containing beryllium fluoride

Abstract

The invention relates to a method for purifying and preparing beryllium hydroxide from a mixture containing beryllium fluoride, belonging to the technical field of metal beryllium metallurgy, and solves the complicated process and high equipment requirements in the existing technology for preparing beryllium hydroxide; The problem of low purity of beryllium. The method for purifying and preparing beryllium hydroxide from a beryllium fluoride-containing mixture of the present invention includes: crushing and ball-milling the beryllium fluoride-containing mixture into powder of the beryllium fluoride-containing mixture; dissolving the beryllium fluoride-containing mixture powder with water to obtain a beryllium fluoride-containing mixture The suspension liquid of the beryllium fluoride mixture; the suspension liquid containing the beryllium fluoride mixture is subjected to solid-liquid separation to obtain the first separation solution and the residue; the first separation solution is added with ammonia water to adjust the pH value to carry out a precipitation, and the removal is carried out once The precipitate obtains the second separation solution; the second separation solution is added with ammonia water to adjust the pH value to carry out secondary precipitation, solid-liquid separation, and drying of the obtained solid to obtain beryllium hydroxide. The beryllium hydroxide is prepared by using the beryllium ore smelting intermediate product containing beryllium fluoride mixture.

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 beryllium fluoride-containing mixture. Background technique [0002] Beryllium is one of the lightest known metal structural materials, with high strength, high elastic modulus, 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 microwave, ...

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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 added to remove impurities, and then precipitated The method needs to go through many tedious operations, requires high investment in equipment, consumes a large amount of reagents, and the purity of the obtained beryllium hydroxide is limited.

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