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Leaching method of weathered crust illuviation type ion rare earth ore

A weathering crust leaching type, ionic rare earth technology, applied in the direction of improving process efficiency, can solve the problems of low leaching rate, large consumption of leaching agent, waste of resources, etc., so as to reduce the generation of ammonia nitrogen wastewater and promote the effect of column leaching. , the effect of reducing costs

Active Publication Date: 2013-08-21
JIANGXI UNIV OF SCI & TECH
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  • Summary
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AI Technical Summary

Problems solved by technology

However, the leaching rate of rare earths with ammonium sulfate is low, and the consumption of leaching agents is large, which not only causes waste of resources, but also produces a large amount of ammonia nitrogen wastewater. Therefore, the research and development of high-efficiency leaching agents can not only increase the leaching rate of rare earths, but also reduce the generation of ammonia nitrogen wastewater , to achieve an economical and environmentally friendly rare earth extraction process

Method used

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  • Leaching method of weathered crust illuviation type ion rare earth ore
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  • Leaching method of weathered crust illuviation type ion rare earth ore

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Take 300g of the raw ore sample from the Longnan Rare Earth Mining Area of ​​Ganzhou Rare Earth Group Corporation, put it into the leaching column, and use the prepared leaching agent to carry out the leaching test. Test conditions: rare earth ore sample 300g, leaching agent: ammonium sulfate, leaching agent concentration: 40g / L, leaching flow rate 0.42mL / min, leaching liquid-solid ratio 0.40mL / g. The leaching rate was 84.03%.

Embodiment 2

[0050] Take 300g of the raw ore sample from the Longnan Rare Earth Mining Area of ​​Ganzhou Rare Earth Group Corporation, put it into the leaching column, and use the prepared leaching agent to carry out the leaching test. Test conditions: rare earth ore sample 300g, leaching agent: ammonium sulfate, leaching agent concentration: 40g / L, leaching aid: fulvic acid, leaching aid concentration: 1g / L; leaching flow rate 0.42mL / min, leaching liquid-solid ratio: 0.40 mL / g. The leaching rate is 94.14%.

Embodiment 3

[0052] Take 300g of the raw ore sample from the Longnan Rare Earth Mining Area of ​​Ganzhou Rare Earth Group Corporation, put it into the leaching column, and use the prepared leaching agent to carry out the leaching test. Test conditions: rare earth ore sample 300g, leaching agent: ammonium sulfate, leaching agent concentration: 30g / L, leaching aid: fulvic acid, leaching aid concentration: 1g / L; leaching flow rate 0.42mL / min, leaching liquid-solid ratio: 0.40 mL / g. The leaching rate is 92.82%.

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Abstract

The invention provides a leaching method of weathered crust illuviation type ion rare earth ore and relates to improvement of a wet metallurgical rare earth leaching process. The leaching process of the leaching method comprises adding a leaching agent for leaching. The leaching method is characterized in that fulvic acid is further added in the leaching process of the leaching method as a leaching aid. The leaching method of weathered crust illuviation type ion rare earth ore provided by the invention obviously prompts the column leaching effect of rare earth while reducing the dosage of ammonium sulfate, reduces the dosage of the leaching agent ammonium sulfate while improving the rare earth leaching rate, and also effectively reduces the rare earth extraction cost and generation of ammonia-nitrogen wastewater.

Description

technical field [0001] The invention discloses a method for leaching weathering crust elution type ion rare earth ores, and relates to an improvement of a rare earth leaching process by hydrometallurgy. Background technique [0002] SiO 2 Mainly, quartz, plagioclase, potassium feldspar, kaolinite and muscovite are the main ore minerals that make up the weathering crust eluvial rare earth ore. The rare earth is mainly adsorbed on kaolinite, halloysite and illite in the form of ions. In clay minerals such as Clay, when rare earth ions encounter chemically more active electrolyte cations (Na + 、K + , NH 4 + 、H + etc.) can be exchanged and resolved from clay minerals. [0003] Sodium chloride and ammonium sulfate are successively used as leaching agents in the extraction of weathered crust eluvial rare earth ores. The leaching selectivity of ammonium sulfate is obviously better than that of sodium chloride, which is beneficial to the extraction of rare earth ions in the le...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/04
CPCY02P10/20
Inventor 罗仙平陈晓明梁长利周贺鹏邹丽萍钱有军唐学昆罗才贵
Owner JIANGXI UNIV OF SCI & TECH
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