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No-saponifying pre-grouped extraction and separation process of ion adsorbing RE mineral

An ionic rare earth ore and separation method technology, which is applied in the field of metallurgy and chemical industry, can solve the problems of low equilibrium acidity and the inability to effectively separate the rare earth chloride feed liquid of the southern ion mine, and meet the requirements of the process and save acid and alkali consumption Effect

Inactive Publication Date: 2008-09-10
北京方正稀土科技研究所有限公司 +2
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with low equilibrium acidity is that the extractant needs to be saponified with alkaline solution or ammonia water to achieve an organic load suitable for industrial production. Therefore, the simple use of unsaponifiable P507 cannot be used for the rare earth chloride feed solution of southern ion mines. effective separation

Method used

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  • No-saponifying pre-grouped extraction and separation process of ion adsorbing RE mineral

Examples

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Effect test

Embodiment 1

[0015] Example 1. Using the rare earth cascade extraction simulation software (software registration number 2001SR1016) to carry out the simulation experiment of the extraction and separation process of the acid-containing system. In the 70-level 400L extraction tank, the flow rate of the organic phase is 100L / min, the feed liquid is medium-yttrium-europium-rich ion-type ore carbonate, and the 1.0mol / L neutral feed liquid enters the extraction tank from multiple stages, and the total flow rate of the feed liquid is 50L / min, the feed liquid is output from multiple outlets. The average rare earth concentration of the feed liquid at the outlet is 0.9mol / L, and the acidity is 0.6mol / L. This feed liquid is used to circulate and dissolve rare earth carbonate for Gd / Tb pre-grouping. In the extraction section, the fourth-stage feed liquid is selected to enter the subsequent separation process. The simulation results show that the total separation process consumes 1.5 tons of hydrochlo...

Embodiment 2

[0016] Example 2. Extraction and separation experiments were carried out in a 60-level 300L extraction tank. The feed liquid was high-yttrium ion-type ore carbonate, and the concentration of the neutral feed liquid fluctuated within the range of 0.6-0.8mol / L. The flow rate of the organic phase is 60-80L / min, and the neutral material liquid is fed into each stage of the extraction tank through multiple inlets, and the total flow rate of the material liquid is 30-40L / min. Perform Dy / Ho pregrouping. The feed liquid output from the sixth stage of the extraction section enters the subsequent separation process. After the feed liquid output from other stages is combined, the rare earth concentration is between 0.6-0.8, and the acidity is between 0.4-0.8mol / L. Use this feed liquid to circulate and dissolve carbonic acid Rare earth, the neutral material liquid (Ph value 3-4) after dissolving rare earth carbonate is added through each inlet. The actual operation results show that the ...

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Abstract

The present invention is process of dissolving ion adsorbing RE ore concentrate with the after acid produced in the exchange course of the hydrogen ion of acid phosphorus extractant, such as P507, etc and the RE material liquid. In the separation process, the material liquid is used circularly and Dy / Ho or Gd / Tb pre-separated, so as to reach the aims of reducing hydrochloric acid for dissolving material and extraction separating and liquid ammonia or liquid alkali for saponifying the organic phase, lowering the extracting and separating cost and decreasing waste water exhaust.

Description

technical field [0001] The invention belongs to the field of metallurgy and chemical industry, and relates to a process extraction and separation method in which rare earth elements are separated by fractionation, extraction, and grouping using 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (hereinafter referred to as P507) as an extraction agent for rare earth mixture raw materials of Nanfang Mine. It is especially suitable for separating rare earth carbonate or rare earth oxide raw materials in southern ion mines with extractants such as P507. Background technique [0002] my country's rare earth resources rank first in the world, and the southern ion-adsorbed ores are rich in medium and heavy rare earths, which have high mining and application value. Southern ion-adsorption mines generally use solutions such as ammonium sulfate and ammonium chloride. After in-situ leaching or heap leaching, ammonium bicarbonate precipitation is used to obtain rare earth carbonate con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26
CPCY02P10/20
Inventor 吴声廖春生贾江涛严纯华
Owner 北京方正稀土科技研究所有限公司