Method for removing impurities from ionic rare-earth ore

An ionic rare earth ore and rare earth technology, applied in the direction of improving process efficiency, can solve problems such as large impurity content, and achieve the effects of safe and simple operation, low energy consumption, and reduced production cost

Inactive Publication Date: 2012-11-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the impurity content in the leaching solution obtained in the leaching process of ion-type rare earth ore is large, resulting in the need to go through complicated follow-up impurity removal work to obtain qualified rare earth products, and proposes an economical, applicable, simple, clean, Method for removing impurities from ionic rare earth ores with environmental protection and good impurity suppression effect

Method used

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  • Method for removing impurities from ionic rare-earth ore

Examples

Experimental program
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Effect test

Embodiment 1

[0046] The ionic rare earth ore A is taken from a rare earth mine in Longnan. Weigh 200g of the ionic rare earth ore A and put it into the leaching column, and leaching the rare earth ore A with the prepared mixed leaching stock solution. The test conditions for leaching are raw ore weight: 200g, leaching method: leaching, leaching agent electrolyte: ammonium sulfate, leaching agent concentration: 4%, leaching agent flow rate: 2.5ml / min, raw ore water content: 0%, liquid-solid ratio: 1:1, tartaric acid concentration: 0.2%. Under the above test conditions, the rare earth leaching rate was 96.30%, the removal rate of aluminum ions was 94.48%, and the removal rate of iron ions was 98.04%.

Embodiment 2

[0048] The ionic rare earth ore B was taken from a rare earth mine in Longnan, and 200g of the ionic rare earth ore B was weighed and put into the leaching column, and the rare earth ore A was leached with the prepared mixed leaching stock solution. The test conditions for leaching are raw ore weight: 200g, leaching method: leaching, leaching agent electrolyte: ammonium sulfate, leaching agent concentration: 4%, leaching agent flow rate: 2.5ml / min, raw ore water content: 0%, liquid-solid ratio: 1:1, tartaric acid concentration: 0.2%. Under the above test conditions, the rare earth leaching rate was 97.19%, the removal rate of aluminum ions was 91.05%, and the removal rate of iron ions was 97.52%.

Embodiment 3

[0050] The ionic rare earth ore C was taken from a rare earth mine in Longnan. Weighed 200g of the ionic rare earth ore C and put it into the leaching column, and leached the rare earth ore A with the prepared mixed leaching stock solution. The test conditions for leaching are raw ore weight: 200g, leaching method: leaching, leaching agent electrolyte: ammonium sulfate, leaching agent concentration: 4%, leaching agent flow rate: 2.5ml / min, raw ore water content: 0%, liquid-solid ratio: 1:1, tartaric acid concentration: 0.2%. Under the above test conditions, the rare earth leaching rate was 95.43%, the removal rate of aluminum ions was 90.87%, and the removal rate of iron ions was 98.90%.

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Abstract

The invention relates to a new method for removing impurities from leachate in a wet metallurgy technology, in particular to a method for removing impurities from ionic rare-earth ore. The method comprises the following steps: A, preparing leachate: dissolving a rare-earth leaching agent and an impurity inhibitor tartaric acid into water, completely mixing, stirring and dissolving to obtain the leachate, wherein in the leachate, the mass percentage concentration of the rare-earth leaching agent is 1 to 6 percent, the mass percentage concentration of the tartaric acid is 0.01 to 1.0 percent and the mass ratio of the rare-earth leaching agent to the tartaric acid is 2 to 100; and B, controlling the leaching process: performing impurity-inhibiting leaching on the ionic rare-earth ore by using the prepared leachate, wherein the flow velocity of the leach is 0.5 to 10 ml/min, the water content of the original ore is 0 to 20 mass percent, and the liquid solid ratio is 0.6:(1-1.4):1. In the leachate subjected to impurity-inhibiting leaching, the impurity ion content is reduced by over 90 percent. The method has the advantages of low energy consumption, low cost, safety and simplicity in operation and the like.

Description

technical field [0001] The invention relates to a new method for removing impurities in leachate in hydrometallurgy technology, in particular to a method for removing impurities in ionic rare earth ores. Background technique [0002] At present, during the leaching process of ionic rare earth ores, the leaching solution will contain a large amount of impurity ions. If oxalic acid or ammonium bicarbonate is used directly to precipitate rare earths from the leaching solution, the rare earth products obtained by precipitation will have a high impurity content; Qualified rare earth products, but the impurity removal process not only increases the operation process, but also loses some rare earths, increases production costs, reduces the comprehensive recycling rate of resources and economic benefits. [0003] China's invention patent application "New process for leaching and removing impurities from ionic rare earth ores" (patent application number 941024555), publication numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/14C22B59/00
CPCY02P10/20
Inventor 邱廷省匡敬忠方夕辉伍红强
Owner JIANGXI UNIV OF SCI & TECH
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