A combined dressing and metallurgy method for extracting beryllium oxide from chrysoberyl beryllium ore

A combined technology of chrysoberyl, beneficiation and smelting, applied in the direction of chemical instruments and methods, wet separation, process efficiency improvement, etc., can solve the problem of beryllium concentrate that does not meet the requirements of beryllium smelting, cannot adapt to the production process, and concentrate grade Low-level problems, to achieve the effect of increasing strength, reducing roasting time, and lowering roasting temperature

Inactive Publication Date: 2018-04-06
广东省资源综合利用研究所 +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This type of chrysoberyl beryllium ore resource is unique. Compared with beryl beryllium ore, although the original ore has a high BeO content, it is difficult to enrich it through ore dressing. The grade of beryllium concentrate is far lower than the current industrial requirements for beryllium oxide (berylite). It cannot adapt to the current sulfuric acid method beryllium oxide production process in China
[0003] In the 1960s, a number of research institutes at home and abroad used a variety of beneficiation processes and flotation reagents to carry out beneficiation experiments on this type of chrysoberyl ore, but none of them obtained commercial beryllium concentrate that met the requirements of beryllium smelting. mine

Method used

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  • A combined dressing and metallurgy method for extracting beryllium oxide from chrysoberyl beryllium ore

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The chrysoberyl beryllium ore containing 0.59% BeO is ground to 0.074mm, accounting for 98%, adding 12Kg / t of water glass, stirring for 5 minutes, adding 1.2Kg / t of oxidized paraffin wax soap, stirring for 3 minutes, and performing dolomite reverse flotation Election; the dolomite roughing concentrate is subjected to two selections: the first selection does not add chemicals, stirring for 3 minutes; the second selection, adding water glass 2Kg / t, stirring for 3 minutes, and roughing the dolomite The dolomite flotation tailings combined with the tailings and the secondary beneficiation tailings are left to stand naturally for 1 hour, the overflow water in the upper layer is pumped out, and the lower layer is the precipitated grit; add aluminum sulfate 1.33Kg / t to the grit, and stir for 3 minutes , add sodium fluorosilicate 5.33Kg / t, stir for 5 minutes, add Thal soap 1.33Kg / t, oxidized paraffin soap 0.72Kg / t, stir for 3 minutes, carry out a rough separation, add Thal to th...

Embodiment 2

[0019]Chrysoberyl beryllium ore containing 0.40% BeO is ground to -0.074mm, accounting for 97%, adding water glass 8Kg / t, stirring for 5 minutes, modified oleic acid 0.6Kg / t, stirring for 3 minutes, and performing dolomite reverse flotation Rough selection; two selections are carried out on the dolomite rough selection concentrate: the first selection does not add chemicals, stirring for 3 minutes; the second selection adds water glass 2Kg / t, stirring for 5 minutes; the dolomite rough selection The dolomite flotation tailings combined with the tailings and the secondary beneficiation tailings are naturally precipitated for 1 hour, the upper layer overflow water is pumped out, and the lower layer is sand settling; add aluminum sulfate 1.5Kg / t to the sand settling, and stir for 3 minutes; add fluorine Sodium silicate 5Kg / t, stirring for 5 minutes; adding Tal soap 1.2Kg / t, modified oleic acid 0.6Kg / t, stirring for 3 minutes, performing a rough separation, and adding Tal soap 0.4Kg...

Embodiment 3

[0021] Chrysoberyl ore containing 0.245% BeO is ground to -0.074mm, accounting for 98%, adding water glass 6Kg / t, stirring for 5 minutes, oxidized paraffin wax soap 0.7Kg / t, stirring for 3 minutes, and performing dolomite reverse flotation roughing , carry out two selections on the dolomite roughing concentrate: the first selection without adding chemicals, stirring for 3 minutes; the second selection adding water glass 1Kg / t, stirring for 5 minutes; the dolomite roughing tailings The dolomite flotation tailings combined with the secondary beneficiation tailings are naturally precipitated for 1 hour, the upper layer overflow water is removed, and the lower layer is sand settling; add aluminum sulfate 0.9Kg / t to the sand settling, and stir for 3 minutes; add fluorosilicic acid Sodium 1.3Kg / t, stirring for 5 minutes; adding 335g / t of tall soap and 170g / t of oxidized paraffin wax soap, stirring for 3 minutes, and performing a rough separation, and adding 170g / t of tall soap to the...

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Abstract

A dressing-metallurgy combined method for extracting beryllium oxide from alumoberyl beryllium ore is characterized in that the method sequentially includes the following steps that dolomite is subjected to reverse flotation, and dolomite ore concentrate and dolomite flotation tailings are obtained; after the dolomite flotation tailings are subjected to dense dewatering, alumoberyl flotation is performed, alumoberyl and part of gangue emerge at the same time, and beryllium ore concentrate and beryllium flotation tailings are obtained; the beryllium ore concentrate and sodium salt are evenly mixed for granulation, and leach liquor containing beryllium and leaching residues containing beryllium are obtained by means of roasting and dilute acid leaching; and extraction is performed on the leach liquor through 2-ethylhexyl phosphoric acid (P2O4), sec-octyl alcohol and a kerosene extraction agent, a beryllium-loaded organic phase and extraction raffinate are obtained, the beryllium-loaded organic phase is washed with an oxalic acid solution, beryllium is obtained from the beryllium-loaded organic phase through reextraction by means of a sodium hydroxide solution, the concentration of OH- of a reextracted solution is adjusted, beryllium is subjected to hydrolysis precipitation and calcination precipitation, and beryllium oxide is obtained. The dressing-metallurgy combined method for extracting beryllium oxide from alumoberyl beryllium ore is simple in technology, the BeO recycling rate is high, roasting decomposition is facilitated, and the dressing-metallurgy combined method for extracting the beryllium oxideis suitable for processing alumoberyl with the BeO content being 0.15-1.0%.

Description

technical field [0001] The invention relates to a combined dressing and smelting method for extracting beryllium oxide from chrysoberyl beryllium ore, comprising a beneficiation method for flotation of beryllium concentrate suitable for beryllium calcination and leaching from chrysoberyl beryllium ore and extracting beryllium concentrate from chrysoberyl beryllium Metallurgical methods for extracting beryllium oxide. Background technique [0002] Chrysoberyl (BeAl 2 o 3 ) is an important beryllium mineral with high beryllium content. It has stable chemical properties and is almost insoluble in acid and alkali. Except for China, there have been no reports of similar chrysoberyl deposits and corresponding industrial development and utilization in the world. In my country, chrysoberyl is an important beryllium resource next to beryl, and so far the only chrysoberyl deposit has been found in a certain place in Hunan. The beryllium in this ore mainly exists as chrysoberyl, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B35/00C22B1/02C22B3/08B03B9/00B03B7/00
CPCB03B7/00B03B9/00C22B1/02C22B3/08C22B35/00Y02P10/20
Inventor 张先华张忠汉刘勇刘牡丹刘珍珍
Owner 广东省资源综合利用研究所
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