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Method for extracting beryllium from alexandrite-type beryllium concentrate with low enrichment ratio

A technology of chrysoberyl and beryllium concentrate, which is applied in the direction of improving process efficiency, can solve the problems of high impurity content and unfavorable beryllium recovery, and achieve the effects of high product quality, simple and feasible production operation, and low acidity

Active Publication Date: 2013-12-25
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of method that proposes beryllium oxide from the chrysoberyl type beryllium concentrate with low beneficiation enrichment ratio, to solve the impurity content in the leachate that is directly acid leached to the chrysoberyl type beryllium ore. Conducive to the subsequent recovery of beryllium

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] Raw materials: chrysoberyl-type beryllium concentrate, BeO content is 1.31%, fluorine content is 5.46%,

[0019] (1) Pretreatment: pretreat the beryllium concentrate with 3mol / L hydrochloric acid solution, the liquid-solid ratio is 2:1, pretreat the concentrate, wash away most of the impurities such as iron and magnesium carbonate, and use the washing liquid After lime neutralization treatment, the solution recovers calcium chloride, magnesium hydroxide, etc., and the beryllium loss rate is 2%;

[0020] (2) Acidification roasting: add concentrated sulfuric acid to the pretreatment material obtained in step (1) according to the acid-mineral ratio of 1:0.8, and acidify and roast for 0.5h at a temperature of 400°C, and the roasting flue gas is HF, SiF 4 、H 2 O, solid particles, etc., the flue gas is processed through dust collection and impurity removal to recover hydrofluoric acid, etc., and the obtained roasted slag is ball milled to 100 mesh, and the roasting loss rate...

Embodiment 2

[0027] Raw materials: chrysoberyl-type beryllium concentrate, BeO content is 1.53%, fluorine content is 6.13%,

[0028] (1) Pretreatment: pretreat the beryllium concentrate with 5mol / L hydrochloric acid solution, the liquid-solid ratio is 3:1, pretreat the concentrate, wash away most of the iron, magnesium carbonate and other impurities, and use the washing liquid After lime neutralization treatment, the solution recovers calcium chloride, magnesium hydroxide, etc., and the beryllium loss rate is 2%;

[0029] (2) Acidification roasting: add concentrated sulfuric acid to the pretreatment material obtained in step (1) according to the acid-mineral ratio of 1:1.2, and acidify and roast at a temperature of 500°C for 1.5h, and the roasting flue gas is HF, SiF 4 、H 2 O, solid particles, etc., the flue gas is processed through dust collection and impurity removal to recycle hydrofluoric acid, etc., and the obtained roasted slag is ball milled to 120 mesh, and the roasting loss rate ...

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PUM

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Abstract

The invention discloses a method for extracting beryllium from alexandrite-type beryllium concentrate with a low enrichment ratio, and aims to solve the problem of high impurity concentration in the leachate when alexandrite-type beryllium mineral is soaked in acid directly, which strongly influences the follow-up recycling of beryllium. The method comprises the procedures of concentrate pre-treatment, acidification and roasting, water immersion, impurity removing, extraction, and recycling. The method comprises the following particular steps: pretreating the beryllium concentrate using a hydrochloric acid solution 3-5 mol / L with the concentration of 3-5 mol / L; adding concentrated sulfuric acid into the pretreating material obtained in the step (1) according to the acid mineral ratio of 1:(0.8-1.2); performing acidification and roasting for 0.5-1.5 h; performing water immersion according to the liquid solid ratio of (2-3):1; removing impurity through coprecipitation; extracting; performing reextraction, adopting stripping agent with the concentration of 2-3 mol / L to reextract the loading organic phase obtained in the step (5), performing ammonia salting-out or thermal decomposition to obtain the end product. The method is simple and reliable; the industrialized production can be easily realized; the content of beryllium fluoride or beryllia is higher than 97%; the product quality is good; the recovery of beryllium is higher than 73%; the method is suitable for extracting beryllium from high-fluoride low-grade alexandrite-type beryllium mineral.

Description

technical field [0001] The invention relates to a method for extracting beryllium oxide from chrysoberyl-type beryllium concentrate with low beneficiation and enrichment ratio, in particular to a method for preparing beryllium oxide from chrysoberyl-type beryllium ore with low beryllium content and high fluorine content. Background technique [0002] Beryllium is a rare element that plays an important role in the national economy and defense industry, especially in nuclear industry, aerospace industry, electronics industry and other fields. Since beryllium metallurgy was used in industrial production, industrial beryllium oxide was extracted from beryl lump ore. Since beryl resources cannot meet the needs of industrial development, Brash Corporation of the United States began to produce industrial beryllium oxide with hydroxysilicate stone in 1969. Urba Beryllium Smelter in Kazakhstan also began to extract industrial beryllium oxide from Russian silicon beryllium stone by a...

Claims

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Application Information

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IPC IPC(8): C22B26/20C22B1/00C22B1/06C22B3/44C22B3/40
CPCY02P10/20
Inventor 马进张恩玉易超洪涛贡大雷马爱军鲁兴武曹桂银李俞良邵传兵程亮韩晓龙李守荣
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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