A method for recycling tombarthite from weathering crust elution-deposited tombarthite ores

A weathered crust leaching type, rare earth ore technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve the problems of low recovery rate of rare earth, high impurities, heavy pollution, etc. The effect of reducing cost and improving recovery rate

Inactive Publication Date: 2018-12-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the defects of low rare earth recovery rate, high impurities and heavy pollution in the prior art, thereby providing a method for recovering rare earth from weathering crust leaching type rare earth ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for recovering rare earth from a weathering crust elution type rare earth ore, using a weathering crust elution type rare earth raw ore soil sample from a rare earth mine in Dingnan, Ganzhou, Jiangxi as experimental raw materials, and the content of rare earth in the raw ore soil sample is 0.061wt%. First, prepare a 2wt% magnesium chloride solution, add hydrochloric acid to adjust the pH of the magnesium chloride solution to be 5.5, prepare an ore leaching agent solution, and leach the above-mentioned raw ore soil sample to obtain an ore leaching solution, and the concentration of rare earth in the solution is 0.037g / L; Then measure 5L ore leaching leaching solution, slowly drip milk of lime under constant stirring to adjust the pH of the solution to be 7.0, then add 12.5g nanometer carbon black and 2.5g carboxymethyl starch in leaching ore leaching solution, continue to stir for 24h, After filtering, collect the filter material, then add 5wt% hydrochloric acid ...

Embodiment 2

[0029] A method for recovering rare earth from a weathering crust elution type rare earth ore, using a weathering crust elution type rare earth raw ore soil sample from a rare earth mine in Dingnan, Ganzhou, Jiangxi as experimental raw materials, and the content of rare earth in the raw ore soil sample is 0.064wt%. First, prepare a 2wt% magnesium chloride solution, add hydrochloric acid to adjust the pH of the magnesium chloride solution to be 5.0, and prepare a leaching agent solution to leach the above-mentioned raw ore soil sample to obtain a leaching solution, and the concentration of rare earth in the solution is 0.030g / L; Then measure 5L of ore leaching solution, slowly add milk of lime dropwise under constant stirring to adjust the pH of the solution to 6.5, then add 20g of nano-carbon black and 2g of polyacrylamide to the leaching solution, continue to stir for 12h, and collect after filtration filter material, then add 5%wt hydrochloric acid solution and water in the f...

Embodiment 3

[0031]A method for recovering rare earth from a weathering crust elution type rare earth ore, using a weathering crust elution type rare earth raw ore soil sample from a rare earth mine in Dingnan, Ganzhou, Jiangxi as experimental raw materials, and the content of rare earth in the raw ore soil sample is 0.023wt%. First, prepare a 2wt% magnesium chloride solution, add hydrochloric acid to adjust the pH of the magnesium chloride solution to be 5.5, and prepare a leaching agent solution to leach the above-mentioned raw ore soil sample to obtain a leaching solution. The concentration of rare earth in the solution is 0.010g / L; Then measure 5L ore leaching solution, slowly add milk of lime dropwise under constant stirring to adjust the pH of the solution to be 8.0, then add quality nano-carbon black and 0.25g carboxymethyl cellulose to the leaching solution, continue Stir for 18 hours, collect the filter material after filtering, then add 5%wt hydrochloric acid solution to the filte...

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Abstract

A method for recovering tombarthite from weathering crust elution-deposited tombarthite ores comprises the following steps: leaching ore, leaching a weathering crust elution-deposited tombarthite oreby an ore-leaching agent to obtain ore leaching liquor; adsorption and enrichment, The lime milk regulating solution of pH 6.5-8.0 is slowly dropwise added under constant stirring and the adsorbent isadded to the leaching liquor, then filter it and collect the filter material in which the adsorbent comprises nano-carbon black and anionic flocculant with a mass ratio of 10:1 and 5:1 respectively;removing the impurity, adding an acidic solution to the above filter material to dissolve, adjusting the pH of the dissolution process to 3.0~4.5, and adding impurity removal agent after the tombarthite hydrate in the filter material is dissolved, adjusting the pH of the impurity removal process to 5.5~6.0, filtering after removing impurities and collecting the filtrate; precipitation, adding a precipitant to the filtrate to carry out tombarthite precipitation, the tombarthite is obtained after filtering to improve the recovery rate of the tombarthite, it is suitable for recovering the ore leaching liquor with the tombarthite content not lower than 0.01 g/L.

Description

technical field [0001] The invention relates to the technical field of mining technology, in particular to a method for recovering rare earths from weathering crust leaching type rare earth ores. Background technique [0002] Weathering crust leaching type rare earth ore is a special kind of rare earth ore with high distribution of medium and heavy rare earths. It is a strategic mineral for national development. The rare earth elements in weathering crust leaching type rare earth ore are mainly adsorbed in the form of hydrated or hydroxyl hydrated ions On clay minerals, the grade of rare earth is low, only 0.05-0.3%. The particle size of the ore is extremely fine, and more than 50% of the rare earths are stored in the 0.52-0.78mm particle size with a yield of 24-32%. Conventional physical beneficiation cannot enrich rare earths into corresponding rare earth concentrates, so chemical leaching can only be used. Take technology. When the weathering crust elution-type rare ear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B3/44C22B3/24C22B59/00C07C51/41C07C55/07
CPCC07C51/412C22B3/10C22B3/24C22B3/44C22B59/00C07C55/07Y02P10/20
Inventor 张春雷张诚杨国春何文付玉华王观石
Owner JIANGXI UNIV OF SCI & TECH
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