Single-step impurity removal method for re dip solution of weathering crust infiltration-type rare earth ore

A weathering shell leaching type and leachate technology, which is applied in the field of hydrometallurgy, can solve the problems of large loss of rare earth, low efficiency, cumbersome operation, etc., and achieve the effects of improved impurity removal rate, simple production operation, and increased purity

Inactive Publication Date: 2015-10-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a one-step impurity removal method for the rare earth leaching solution of weathering crust elution type rare earth ore, which solves the shortcomings of cumbersome operation, low efficiency and large loss of rare earth in the existing impurity removal method

Method used

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Effect test

Embodiment 1

[0023] A one-step impurity removal method for rare earth leaching solution of weathering crust leaching type rare earth ore, for a weathering crust leaching type rare earth ore in Guangdong, the rare earth composition is medium yttrium rich in europium, the average grade of rare earth is 0.083%, and ammonium chloride is used as the leaching solution. Mineral agent, using the in-situ leaching process to extract rare earths, the rare earth leachate is collected through the liquid collection tank and then pumped into the impurity removal tank, the rare earth concentration in the rare earth leachate (RE 2 o 3 ) is 0.1g / L, impurity metal concentration (M x o y ) is 0.05g / L, and its impurity removal method comprises the following steps:

[0024] Under stirring conditions, according to the volume ratio of the ammonium bicarbonate and ammonium sulfide mixed solution to the rare earth leaching solution at a ratio of 0.05:1, add the ammonium bicarbonate and ammonium sulfide mixed solu...

Embodiment 2

[0027] A one-step impurity removal method for rare earth leaching solution of weathering crust leaching type rare earth ore, for a weathering crust leaching type rare earth ore in Guangdong, the rare earth composition is medium yttrium type, the average grade of rare earth is 0.12%, and ammonium chloride is used as the leaching agent , using the in-situ leaching process to extract rare earths, the rare earth leach solution is collected through the liquid collection tank and then pumped into the impurity removal tank, the rare earth concentration in the rare earth leach solution (RE 2 o 3 ) is 5g / L, impurity metal concentration (M x o y ) is 1g / L, and its impurity removal method comprises the following steps:

[0028] Under stirring conditions, according to the ratio of the volume ratio of ammonium bicarbonate and sodium sulfide mixed solution to the rare earth leaching solution of 0.1:1, add ammonium bicarbonate and sodium sulfide mixed solution to the rare earth leaching so...

Embodiment 3

[0031] A one-step impurity removal method for rare earth leaching liquid of weathering crust elution type rare earth ore. For a weathering crust elution type rare earth ore in Guangdong, the rare earth composition is medium yttrium rich in europium, and the average grade of rare earth is 0.078%. The in-situ leaching process is adopted. Ammonium sulfate is used as a leaching agent to extract rare earths. The rare earth leachate flows into the liquid collection tank through the liquid collection ditch, and then is pumped into the impurity removal tank by the centrifugal pump. The rare earth concentration in the rare earth leachate (RE 2 o 3 ) is 1.21g / L, impurity metal concentration (M x o y ) is 0.23g / L, and its impurity removal method comprises the following steps:

[0032] Under stirring conditions, according to the ratio of the volume ratio of ammonium bicarbonate and ammonium sulfide mixed solution to the rare earth leaching solution of 0.08:1, add ammonium bicarbonate a...

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Abstract

The invention discloses a single-step impurity removal method for a re dip solution of weathering crust infiltration-type rare earth ore. The single-step impurity removal method aims at solving the problems that the metal ion content of a re dip solution of weathering crust infiltration-type rare earth ore is high, foreign ions can be removed only through a multi-step impurity removal method which is long in technical process and complex in operation, and the rare earth loss is high in the impurity removal process. The single-step impurity removal method is simple in process and convenient to implement, and includes the following specific steps that (1), a mixed solution of ammonium bicarbonate and inorganic sulfide is directly added to the re dip solution; (2), ammonium hydroxide or sulfuric acid is added to adjust the pH value of the solution; and (3), the re dip solution is stirred continuously, supernate is obtained after standing, and a saturated ammonium bicarbonate solution or oxalic acid solution can be directly used for rare earth precipitation to obtain rare earth products. The single-step impurity removal method can reduce the foreign metal content in rare earth products, improves the purity and recycling rate of rare earth products, and is suitable for application and popularization.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a one-step impurity removal method for rare earth leaching liquid of weathering crust leaching type rare earth ore. Background technique [0002] Weathering crust eluvial rare earth ores are widely distributed in seven provinces including Jiangxi, Guangdong, Fujian, Hunan, Yunnan, Guangxi and Zhejiang. Because it is rich in medium and heavy rare earths with high commercial value, the mining of this mine has always been popular. High attention at home and abroad. Weathering crust leaching type rare earth ores are composed of rare earth-containing granite and volcanic rocks, which are weathered to form kaolinite, halloysite, montmorillonite and illite through biological, chemical and physical actions in a warm and humid climate. At the same time, the easily weathered rare earth minerals in the original rock are weathered and dissociated to form rare earth hydrated ions o...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/12
CPCY02P10/20
Inventor 池汝安张臻悦何正艳
Owner WUHAN INSTITUTE OF TECHNOLOGY
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