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Weathering shell leaching-type rare earth ore leaching agent and leaching method thereof

A weathering crust leaching type, rare earth ore technology, which is applied in the direction of improving process efficiency, can solve the problems of long leaching time, many metal aluminum impurities, and easy landslides, so as to speed up the leaching process, improve economic benefits, and mine deposits stable effect

Active Publication Date: 2019-05-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of more metal aluminum impurities, long leaching time, and easy landslides in the leaching process of the weathering crust elution-type rare earth ore in the prior art, thereby providing a weathering crust Leaching agent and method for leaching rare earth ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a kind of leaching method of weathering crust leaching type rare earth ore, using a weathering crust leaching type rare earth raw ore soil sample from a rare earth mine in Dingnan, Ganzhou, Jiangxi Province as the experimental raw material, and the content of rare earth in the raw ore soil sample is as follows: 0.061 wt%.

[0033] The leaching agent that adopts comprises pretreatment reagent and leaching reagent, at first prepares pretreatment reagent, and its composition is, mass concentration is the aqueous solution 300g of 1.2% sodium hydroxide, carboxymethyl chitosan 9g, hydroxypropyl starch 24g, Mix each component uniformly to obtain a pretreatment reagent; then prepare a leaching reagent, which consists of 3 g of glycerol, 300 g of an aqueous solution of ammonium chloride with a mass concentration of 3%, and 13.5 g of potassium acetate; each component is mixed uniformly, Get the leaching reagent.

[0034] The test was carried out under th...

Embodiment 2

[0036] This embodiment provides a kind of leaching method of weathering crust leaching type rare earth ore, using the weathering crust leaching type rare earth raw ore soil sample of a rare earth mine in Dingnan, Ganzhou, Jiangxi Province as the experimental raw material, and the content of rare earth in the raw ore soil sample is as follows: 0.061 wt%.

[0037] The leaching agent that adopts comprises pretreatment reagent and leaching reagent, at first prepares pretreatment reagent, and its composition is, mass concentration is the aqueous solution 300g of 0.3% potassium hydroxide, carboxymethyl chitosan 18g, hydroxyethyl starch 15g, Mix each component uniformly to obtain a pretreatment reagent; then prepare a leaching reagent, which consists of 7.5 g of propylene glycol, 300 g of an aqueous solution of ammonium sulfate with a mass concentration of 1%, and 9 g of potassium acetate, and mix each component uniformly to obtain a leaching reagent. reagent.

[0038] The test was ...

Embodiment 3

[0040] This embodiment provides a kind of leaching method of weathering crust leaching type rare earth ore, using a weathering crust leaching type rare earth raw ore soil sample from a rare earth mine in Dingnan, Ganzhou, Jiangxi Province as the experimental raw material, and the content of rare earth in the raw ore soil sample is as follows: 0.061 wt%.

[0041] The leaching agent that adopts comprises pretreatment reagent and leaching reagent, first prepares pretreatment reagent, and its composition is, mass concentration is the aqueous solution 300g of 0.8% sodium hydroxide, carboxymethyl chitosan 12g, hydroxypropyl starch 18g, Mix each component uniformly to obtain a pretreatment reagent; then prepare a leaching reagent, which consists of 4.5 g of ethylene glycol, 300 g of an aqueous solution of ammonium sulfate with a mass concentration of 2%, and 12 g of potassium acetate, and mix the components uniformly to obtain Leach reagent.

[0042] The test was carried out under t...

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Abstract

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a weathering shell leaching-type rare earth ore leaching agent and a leaching method thereof. The leachingagent is prepared from a pretreament reagent and a leaching reagent, specifically, the pretreament reagent is prepared from an aqueous alkali solution, carboxymethyl chitosan, and modified starch andthe leaching reagent is prepared from polyhydric alcohol, an aqueous solution of ammonium salt and potassium acetate. Through cooperation of the pretreament reagent and the leaching reagent, the leaching time is shortened, impurity leaching is avoided, and landslide occurrence is avoided as well in leaching. Specifically, small particles in rare earth ore can be dissolved out of the ore layer by the pretreatment reagent, and a leaching channel is opened to prevent the small particles from blocking a pore passage, so that the subsequent leaching is smoother, the leaching is accelerated, and theore bed is stable to avoid occurrence of the landslide disaster; and the leaching of metals such as aluminum impurities is effectively avoided by the leaching reagent, so that the cost of the subsequent leaching treatment of the leaching solution is reduced, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a leaching agent and a leaching method for weathering crust leaching type rare earth ore. Background technique [0002] Weathering crust elution-type rare earth ore is an important mineral resource rich in medium and heavy rare earth elements, which is widely distributed in southern provinces such as Jiangxi, Fujian, Guangdong, Hunan, Yunnan, Guangxi and Zhejiang. The weathering crust leaching type rare earth ore is formed by the weathering of the original rock containing rare earth through biological, chemical and physical effects. Rare earth elements are adsorbed on clay minerals in the form of rare earth hydrated ions or hydroxyl hydrated ions. In industry, the solution leaching method is usually adopted, and the rare earth ions are replaced in the rare earth leaching agent solution by ion exchange method to obtain a rare earth leachate, and then the rare ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/14C22B59/00
CPCY02P10/20
Inventor 张春雷袁宪强张诚何文杨国春付玉华
Owner JIANGXI UNIV OF SCI & TECH
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