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Production method for extracting gallium

A product and filtrate technology, which is applied in the field of gallium metal extraction, can solve the problems of high cost and aluminum loss, and achieve the effect of low cost and simple production process

Active Publication Date: 2009-06-03
内蒙古蒙西鄂尔多斯铝业有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of its production methods are lime milk carbonation method and resin adsorption method, etc. Among them, the lime milk carbonation method is to pass carbon dioxide gas in the mother liquor of alumina carbon, carry out carbonation and decomposition, and then add lime milk to dealuminate to reach the gallium content. Enrichment, this method forms calcium aluminate, and a large amount of aluminum is lost; the resin adsorption method is to directly use resin in the circulating mother liquor of alumina production to absorb gallium, and then desorb to achieve the enrichment of gallium. If the amount of gallium in the circulating mother liquor The concentration is low, and its cost is relatively high

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  • Production method for extracting gallium

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Embodiment 1

[0009] Embodiment 1: The present invention utilizes 1 ton of fly ash and 4 tons of limestone to prepare raw meal, sinters 3.1 tons of clinker at 1200°C, and dissolves the clinker with 60g / l sodium carbonate lye at a temperature of 70°C for 0.5 hours , liquid-solid separation to obtain silicon-calcium slag filter cake and sodium aluminum (gallium) acid (NaAl (Ga) O 2 ) filtrate 16.5m 3 . Among them, sodium aluminum (gallate) (NaAl (Ga) O 2 ) The concentration of aluminum oxide in the filtrate was 30 g / l, and the concentration of gallium oxide was 0.067 g / l. Sodium aluminum (gallium) filtrate adopts CO 2 Continuous carbonation and decomposition to obtain aluminum hydroxide filter cake and intermediate product carbon separation mother liquor filtrate 16.3m 3 . Determination of the aluminum oxide concentration in the intermediate product carbon fraction mother liquor filtrate is 0.64g / l, and when the concentration of gallium oxide is 0.064g / l, take the carbon fraction mother ...

Embodiment 2

[0010] Embodiment 2: The present invention utilizes 0.7 tons of fly ash, 0.3 tons of coal gangue, and 1.5 tons of limestone to prepare raw meal, and sinters 1.6 tons of clinker at 1450° C., and the clinker uses 60 g / l of sodium carbonate lye at a temperature of 70° C. After 1 hour of stripping at high temperature, the liquid-solid separation obtains calcium-silicon slag filter cake and sodium aluminum (gallium) acid (NaAl (Ga) O 2 ) filtrate 3.7m 3 . Among them, sodium aluminum (gallate) (NaAl (Ga) O 2 ) The concentration of aluminum oxide in the filtrate was 40 g / l, and the concentration of gallium oxide was 0.06 g / l. Sodium aluminum (gallium) filtrate adopts CO 2 Continuous carbonation and decomposition to obtain aluminum hydroxide filter cake and intermediate product carbon separation mother liquor filtrate 2.6m 3 . Measure the aluminum oxide concentration in the intermediate product carbon fraction mother liquor filtrate 1.42g / l, and when the concentration of gallium ...

Embodiment 3

[0011] Embodiment 3: The present invention utilizes 0.6 tons of fly ash, 0.2 tons of coal gangue, 0.2 tons of kaolin and 2 tons of limestone to prepare raw meal, and sinters 1.9 tons of clinker at 1350 ° C, and uses 60 g / l sodium carbonate lye for clinker After leaching for 1 hour at a temperature of 70°C, the liquid-solid separation obtained calcium-silicon slag filter cake and sodium aluminum (gallium) acid (NaAl (Ga) O 2 ) filtrate 6.3m 3 . Among them, sodium aluminum (gallate) (NaAl (Ga) O 2 ) The concentration of aluminum oxide in the filtrate was 26 g / l, and the concentration of gallium oxide was 0.05 g / l. Sodium aluminum (gallium) filtrate adopts CO 2 Continuous carbonation and decomposition to obtain aluminum hydroxide filter cake and intermediate product carbon separation mother liquor filtrate 6.2m 3 . When the concentration of aluminum oxide in the intermediate product carbon fraction mother liquor filtrate is 2.0g / l, and the concentration of gallium oxide is 0...

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Abstract

The present invention discloses a production method for extracting metal gallium by utilizing carbonous mother liquor filtrate-intermediate product obtained in production process of aluminium oxide from non-bauxite. Said production method includes the following steps: adding sodium hydrogen carbonate into the carbonous mother liquor, stirring them, making carbonization decomposition reaction to obtain gallium concentrate, using sodium hydroxide to dissolve said gallium concentrate, filtering and separating to obtain electrolytic solution, electrolyzing to obtain the invented metal gallium. Said invention can utilize fly-ash, coal gangue and kaoline to produce aluminium oxide, at the same time can produce metal gallium.

Description

Technical field: [0001] The invention relates to a production method for extracting gallium, in particular to a method for extracting metal gallium in the process of producing alumina from fly ash, coal gangue, kaolin and other non-bauxite ores. Background technique: [0002] Gallium is an important raw material for the electronics industry. With the rapid development of the electronics industry, the demand for gallium is increasing, and the source of gallium is also very scarce. At present, the source of gallium is mainly recovered from the process of producing alumina from bauxite. Most of its production methods are lime milk carbonation method and resin adsorption method, etc. Among them, the lime milk carbonation method is to pass carbon dioxide gas in the mother liquor of alumina carbon, carry out carbonation and decomposition, and then add lime milk to dealuminate to reach the gallium content. Enrichment, this method forms calcium aluminate, and a large amount of alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B58/00C22B3/12C22B3/44C25C1/22
CPCY02P10/20
Inventor 魏一林周立平杜鸿逵赵雄慧沈军李淑振张凤英
Owner 内蒙古蒙西鄂尔多斯铝业有限公司
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