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Method for preparing rare earth carbonate from ionic rare earth ore

A technology of ionic rare earth ore and rare earth carbonate, which is applied in the field of rare earth metallurgy, can solve the problems of complex preparation process and high condition requirements, and achieve the effect of low separation cost, high purity and less loss of rare earth

Pending Publication Date: 2022-04-29
江西离子型稀土工程技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, magnesium bicarbonate is a metastable substance, and the preparation process is complicated and the conditions are relatively high.

Method used

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  • Method for preparing rare earth carbonate from ionic rare earth ore
  • Method for preparing rare earth carbonate from ionic rare earth ore
  • Method for preparing rare earth carbonate from ionic rare earth ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Table 1 is the material composition of ionic rare earth ores.

[0077] Table 1 Rare Earth Element Distribution Table of Ionic Rare Earth Ore Unit: wt%

[0078]

[0079] The ionic RE content of the ionic rare earth mineral is 0.0396wt%.

[0080] ore leaching

[0081] According to the solid-liquid ratio of 1kg:0.66L, prepare a magnesium sulfate leaching agent with a mass fraction of 2%, adjust the pH value to 5.0, add ionic rare earth ore to leaching the ore, take the leaching solution, and add top water after the leaching agent has run out Wash until the lotion does not contain rare earths, and the leaching solutions are combined to obtain the ionic rare earth leaching solution. The ingredients of the leachate are shown in Table 2:

[0082] Table 2 Leaching liquid composition

[0083]

[0084] Extraction Resin Pretreatment

[0085] The extraction resin used is P507, according to the extraction resin: hydrochloric acid = 1:1 (volume ratio), soak in hydrochloric...

Embodiment 2

[0104] Table 4 is the distribution table of rare earth elements in ionic rare earth ores.

[0105] Table 4 Distribution table of rare earth elements in ionic rare earth ores Unit: wt%

[0106]

[0107] The ionic RE content of the ionic rare earth mineral is 0.110wt%.

[0108] ore leaching

[0109] According to the solid-liquid ratio of 1kg:0.55L, prepare a magnesium sulfate leaching agent with a mass fraction of 3%, adjust the pH value to 4.5, add the ionic rare earth ore to leaching the ore, take the leachate, and add top water after the leaching agent has run out. Wash until the lotion does not contain rare earths, and the leaching solutions are combined to obtain the ionic rare earth leaching solution. The ingredients of the leachate are shown in Table 5:

[0110] Table 5 Leaching solution composition

[0111]

[0112] Extraction Resin Pretreatment

[0113] The extraction resin used is P507, according to the extraction resin: hydrochloric acid = 1:1 (volume ratio...

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Abstract

The invention provides a method for preparing rare earth carbonate from ionic rare earth ore, and belongs to the technical field of rare earth metallurgy. According to the method, the extraction resin is used for adsorption-desorption, impurities Mg and Fe and most Si and Ca can be removed, the extraction resin can be recycled, Al can be efficiently removed through the procedures of liquid residual acid neutralization after desorption and Al removal through the aluminum removal agent, rare earth loss is small, and the aluminum removal agent can be recycled. And finally, precipitating to obtain a rare earth carbonate product with the rare earth content of more than 93wt% after burning. The method is good in production environment, high in impurity removal rate, low in chemical reagent consumption, high in rare earth precipitation product purity, low in impurity content and low in later rare earth smelting separation cost.

Description

technical field [0001] The invention relates to the technical field of rare earth metallurgy, in particular to a method for preparing rare earth carbonate from ionic rare earth ore. Background technique [0002] Since the development of the ionic rare earth ore leaching process, ammonium sulfate is generally used as the leaching agent and ammonium bicarbonate is used as the precipitating agent, but there are fatal defects such as ammonia nitrogen pollution and affecting groundwater quality. In order to solve the problem of ammonia nitrogen pollution, technologies such as ammonia-free ore leaching and ammonia-free precipitation have been developed successively. The currently reported ammonia-free leaching agents include magnesium sulfate, magnesium chloride, calcium chloride, ferric sulfate, aluminum chloride, aluminum sulfate, etc. Among them, magnesium sulfate is the most widely used and industrialized leaching agent. The methods for preparing rare earth carbonate from ion...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/38C22B3/44C22B3/04
CPCC22B59/00C22B3/08C22B3/44
Inventor 柯兆华邱小英郭安蓝桥发葛刘生肖莉
Owner 江西离子型稀土工程技术研究有限公司
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