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Method for leaching weathering crust leaching type rare earth ore by using plant extract

A weathered shell leaching type, plant extract technology, applied in the direction of improving process efficiency, can solve problems such as application in the field of utilization of mineral resources that have not been seen, and achieve improvement in salinization and heavy metal pollution, easy access to raw materials, and good application. effect of value

Active Publication Date: 2021-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although wood vinegar has some research and application in fields such as agriculture and environmental protection, it has not yet been used in the field of mineral resource utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The corncobs were crushed to 100 mesh and left to ferment for 13 hours. The fermented product was put into a pyrolysis kettle for pyrolysis for 3 hours, and the pyrolysis temperature was controlled at 140°C. The pyrolyzed liquid was collected and naturally precipitated for 15 days, and the supernatant was filtered and decolorized by activated carbon adsorption to obtain the corncob pyrolyzed liquid.

[0032] Take 200g of dried ionic rare earth grade 0.12% weathering crust elution type rare earth ore, and put the ore sample into the leaching column. The concentration of the plant extract (corncob pyrolysis solution) was prepared to be 800 g / L, and the pH was adjusted to 3.0 to obtain a leaching agent solution. Then the column leaching experiment was carried out on the ore sample with the leaching agent solution, the leaching liquid-solid ratio was 2:1, and the leaching time was 5 hours. The rare earth leaching solution was tested by an inductively coupled plasma spectr...

Embodiment 2

[0034] The dried bamboo is crushed and extruded to form a ball. Bamboo clumps are put into the charcoal kiln for dry distillation, and the dry distillation temperature is gradually increased and controlled at 90-250°C. After the white smoke stops volatilizing, the bamboo wood vinegar gas is collected. When blue-green smoke is produced in the kiln, stop collecting the bamboo wood vinegar gas, and the gas is condensed to obtain Coarse bamboo wood vinegar. Thick bamboo wood vinegar is put into a flask and distilled under normal pressure, and fractions at 98-103°C are collected, and the fractions are adsorbed and decolorized by activated carbon to obtain wood vinegar.

[0035]Take 200g of dried ionic rare earth grade 0.12% weathering crust elution type rare earth ore, and put the ore sample into the leaching column. Preparation ammonium sulfate leaching agent is the mixed solution of 0.1mol / L, bamboo wood vinegar liquid concentration 50g / L, adjusts the pH of mixed solution to be ...

Embodiment 3

[0037] The dry oak wood is crushed and extruded to form a ball. Add the oak wood clumps to the charcoal kiln for dry distillation, and the temperature of the dry distillation will gradually increase and be controlled at 90-250°C. After the white smoke stops volatilizing, the oak wood vinegar gas will be collected. When blue-green smoke is produced in the kiln, stop collecting the oak wood vinegar gas. The gas is condensed to obtain crude oak wood vinegar. The crude oak wood vinegar is put into a flask for atmospheric distillation, and the fraction at 98-103°C is collected, and the fraction is adsorbed and decolorized by activated carbon to obtain the wood vinegar.

[0038] Take 200g of dried ionic rare earth grade 0.12% weathering crust elution type rare earth ore, and put the ore sample into the leaching column. Preparation magnesium sulfate leaching agent is the mixed solution of 0.25mol / L oakwood wood vinegar liquid concentration 60g / L, adjusts pH to be 3.0, obtains leachi...

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Abstract

The invention discloses a method for leaching weathering crust leaching type rare earth ore by using a plant extract. The method comprises the following steps of (1) preparing a plant extracting solution; and (2) leaching the weathering crust leaching rare earth ore by utilizing the plant extracting solution. According to the method, the plant extract is adopted as a leaching agent or an auxiliary leaching agent of the weathering crust leaching type rare earth ore, and the plant extract contains rich organic matters (such as phenols, ketones and organic acids), so that rare earth elements can be efficiently leached out. The method is good in leaching effect, environmentally friendly and low in cost, raw materials are easy to obtain, plant extract components are beneficial to ecological restoration and improvement, and the method has good application value.

Description

technical field [0001] The invention belongs to the technical field of rare earth metallurgy, and in particular relates to a method for leaching weathering crust leaching type rare earth ore by using plant extracts. Background technique [0002] Weathering crust elution-type (ion-type) rare earth ore is an important rare earth-containing mineral resource, which was discovered for the first time in Ganzhou City, Jiangxi Province, my country. Such minerals are widely distributed in Jiangxi, Guangdong, Guangxi and other provinces in southern my country. They have a complete distribution of rare earths, low radioactivity, and are rich in medium and heavy rare earth elements. They are valuable strategic mineral resources in my country. At present, industrial production generally adopts the in-situ leaching process of ammonium salts to recover rare earths, that is, ammonium sulfate is used as the leaching agent to in-situ leach the rare earth elements in the weathering crust leach...

Claims

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Application Information

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IPC IPC(8): C22B3/16C22B59/00
CPCC22B3/16C22B59/00Y02P10/20
Inventor 赵红波申丽张麓原邱冠周
Owner CENT SOUTH UNIV
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