Rare earth ore leaching agent and leaching process

A rare earth ore and leaching technology, which is applied in the direction of improving process efficiency, can solve the problems of high leaching rate and high selectivity of rare earth leaching agents, and achieve high selectivity, reduced content, and low agent cost. Effect

Inactive Publication Date: 2016-08-03
JIANGXI UNIV OF SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, what the present invention is to solve is the problem that the high leaching rate and high selectivity of the rare earth leaching agent in the prior art cannot have both problems, thereby providing a kind of rare earth ore leaching agent with high leaching rate and high selectivity and Leaching process

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  • Rare earth ore leaching agent and leaching process
  • Rare earth ore leaching agent and leaching process

Examples

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Embodiment 1

[0031] This embodiment provides a rare earth ore leaching agent, including ammonium thiosulfate, ammonium sulfate, ammonium chloride and water. The mass ratio of the ammonium thiosulfate, the ammonium sulfate and the ammonium chloride is 3:3:4, and the mass concentration of the leaching agent is 1.5wt%.

[0032] A kind of rare earth leaching technique described in the present invention comprises the following steps:

[0033] S1. Add 500g of ion-adsorbed rare earth ore to the leaching column, and the natural ore loading density of the leaching column is 1.4g / cm 3 ;

[0034] In this embodiment, the ion-adsorption type rare earth ore is a test ore sample from a rare earth company in Guangxi. The appearance of the ore sample is yellow sandy soil-like fine particles, and the rare earth grade in the ionic phase is 0.0556%. The rare earth content of the ion adsorption phase in the ion adsorption type rare earth ore accounts for 72.49% of the total rare earth content.

[0035] S2. ...

Embodiment 2

[0039] This embodiment provides a rare earth ore leaching agent, including ammonium thiosulfate, ammonium sulfate, ammonium chloride and water. The mass ratio of the ammonium thiosulfate, the ammonium sulfate and the ammonium chloride is 3:3:4, and the mass concentration of the leaching agent is 1.5wt%.

[0040] A kind of rare earth leaching technique described in the present invention comprises the following steps:

[0041] S1. Add 500g of ion-adsorbed rare earth ore to the leaching column, and the natural ore loading density of the leaching column is 1.4g / cm 3 ;

[0042] In this example, the ion-adsorption type rare earth ore is the Dingnan ion-adsorption type rare earth test ore sample provided by a rare earth company in Ganzhou. Low-yttrium two-rich rare earth ore; the rare earth content of the ion adsorption phase in the ion adsorption rare earth ore accounts for 55.71% of the total rare earth content.

[0043] S2. Leach the ion-adsorption type rare earth ore in the le...

Embodiment 3

[0047] This embodiment provides a rare earth ore leaching agent, including ammonium thiosulfate, ammonium sulfate, ammonium chloride and water. The mass ratio of the ammonium thiosulfate, the ammonium sulfate and the ammonium chloride is 3:3:4, and the mass concentration of the leaching agent is 1.5wt%.

[0048] A kind of rare earth leaching technique described in the present invention comprises the following steps:

[0049] S1. Add 500g of ion-adsorbed rare earth ore to the leaching column, and the natural ore loading density of the leaching column is 1.4g / cm 3 ;

[0050] In this example, the ion-adsorption type rare earth ore adopts the Xinfeng ion-adsorption type rare earth test ore sample provided by a rare earth company in Ganzhou. Low, medium, and medium-sized rare earth ores (in which the rare earth content is low, Eu 2 o 3 and Y 2 o 3 The distribution content is medium); the rare earth content of the ion adsorption phase in the ion adsorption type rare earth ore ac...

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Abstract

The embodiment of the invention relates to a rare earth ore leaching agent. The rare earth ore leaching agent comprises ammonium thiosulfate, ammonium sulfate and ammonium chloride. Rare earth ions are exchanged and desorbed through NH4+ in the three kinds of ammonium salt; through the positive synergistic effect of the ammonium thiosulfate, the ammonium sulfate and the ammonium chloride, the rare earth ore leaching agent in the embodiment can improve the rare earth ion leaching efficiency and reduce the content of aluminum and iron impurity ions in leaching liquid; and in addition, the agent cost is low, and the rare earth ore leaching agent can be used for the development and utilization of semi-weathering ionic adsorption type rare earth ore. A rare earth leaching process in the embodiment is simple, the high leaching rate and the high selective leaching of the rare earth ions can be achieved, and the rare earth ore leaching agent and leaching process are suitable for industrial large-scale use.

Description

technical field [0001] The invention relates to the field of rare earth hydrometallurgy, in particular to a leaching agent and a leaching process for a semi-weathered ion adsorption type rare earth ore. Background technique [0002] Ion-adsorbed rare earth ore is an ore in which rare earth elements exist in clay minerals in the form of hydrated or hydroxyl hydrated cations. Most of the rare earth elements are adsorbed on certain mineral carriers in different cation states, and a small amount of rare earth elements are in the form of minerals. Phases exist, such as bastnaesite and monazite. For example, in the unique ion-adsorption rare earth ores in southern my country, most of the rare earth elements are adsorbed on clay minerals such as halloysite, illite, kaolinite, montmorillonite and muscovite in the form of rare earth hydration or hydroxyl hydration cations. Ion-adsorbed rare earth ores generally have very low rare earth content, but have a high proportion of medium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B59/00
CPCC22B3/04C22B59/00Y02P10/20
Inventor 黄万抚文金磊王宏良李新冬邹志强安占涛陈园园钟祥熙吴浩顾智杰
Owner JIANGXI UNIV OF SCI & TECH
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