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Treatment method of third phases in wet metallurgy extraction system

A technology of hydrometallurgy and treatment method, which is applied in the field of third phase treatment, and can solve the problems of slow recovery, long cycle, long treatment cycle, etc.

Inactive Publication Date: 2019-01-01
广西银亿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Once the third phase is produced, it is difficult to separate by static sedimentation or filtration. The usual disposal method is long-term storage, relying on natural separation to slowly recover the material liquid and organic phase in the third phase. However, this method has a very long cycle and separation Unsatisfactory effect
In the invention patent with the publication number CN1218113A, a method of adding excess acid and demulsifier to treat the third phase is proposed, but a large amount of acid is difficult to use rationally, and the added demulsifier also has adverse effects on the extraction system
The invention patent with the publication number CN101935756B proposes a third-phase treatment method for rare earth extraction: the third phase is firstly treated by diafiltration, and the solid phase after diafiltration is mixed with soluble bicarbonate or carbonate solution and then heated and stirred. Demulsification, standing still after demulsification, separating the water phase, loading the organic phase with acid stripping to recover the rare earths, and then washing them back for use. The recovery rate of the rare earths and organic phases in this patent is relatively high, but other salts (bicarbonate salts or carbonates) and longer treatment cycles

Method used

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  • Treatment method of third phases in wet metallurgy extraction system

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Effect test

Embodiment 1

[0029] Take out 100L of the third phase in the extraction system that uses P507 as the extraction agent to extract nickel and cobalt. In the third phase: the total content of Ni and Co is 1.5wt%, and the organic phase is 20wt%. Add 680L to the extraction system in the reaction tank The unloaded P507 (that is, the P507 not loaded with the extract) (density 0.85g / ml) obtained through the stripping section is mixed with the third phase, heated to 65°C and stirred for 175min, and then added to the reaction tank with a hydrogen ion concentration of 2mol 400L of sulfuric acid per liter, continue to stir for 5min and then leave it still. After 90min, the upper layer organic matter in the reaction tank is used as the blank organic phase for the next treatment of the third phase. A total of 532kg of organic phase is recovered, and the organic phase recovery rate is 88.96%. The water phase is discharged from the lower part and returned to the extraction system to recover a total of 1.30k...

Embodiment 2

[0031] Take out 100L of the third phase in the extraction system that uses C272 as the extraction agent to extract nickel. The third phase contains 2.0wt% Ni and 22wt% organic phase, and add 350L of unloaded nickel obtained through the stripping section in the extraction system to the reaction tank. Mix C272 (that is, C272 without extract) (density 0.80g / ml) with the third phase, raise the temperature to 50°C and stir for 90 minutes, then add 100L of hydrochloric acid with a hydrogen ion concentration of 12mol / l to the reaction tank, and continue stirring Press filter after 18 minutes, and store the solids after they are discharged from the system. After the liquid phase is allowed to stand for 2 minutes, the organic matter in the upper layer is used as a blank organic phase for the third phase in the next treatment. A total of 274 kg of organic phase is recovered, and the recovery rate of the organic phase is 90.73%. The water phase is discharged from the lower part and return...

Embodiment 3

[0033] Take out 100L of the third phase in the extraction system that uses P204 as the extraction agent to extract nickel and cobalt. In the third phase: the Ni and Co contents are 1.5wt% in total, and the organic phase is 15wt%. The unloaded P204 obtained in the extraction section (that is, the P204 not loaded with the extract) (density 0.85g / ml) is mixed with the third phase, heated to 35°C and stirred for 18 minutes, and then added to the reaction tank with a hydrogen ion concentration of 8mol / l 80L of hydrochloric acid, continue to stir for 12min and then stand still. After standing for 40min, the organic matter in the upper layer of the reaction tank is used as the blank organic phase for the next treatment of the third phase. A total of 80.52kg of organic phase is recovered, and the recovery rate of organic phase is 88.00%. The phase is discharged from the lower part and returned to the extraction system to recover a total of 1.25kg of Ni and Co, with a metal recovery rat...

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Abstract

The invention discloses a treatment method of third phases in a wet metallurgy extraction system. The method is characterized by comprising the following steps that a, extraction agents are added intothe third phases in the wet metallurgy extraction system; stirring is performed; b, acid is added into a mixture obtained in the step a for performing back extraction; c, a mixture obtained after back extraction in the step b is subjected to phase splitting. The treatment method has the advantages that material liquid and organic phases carried by the third phases can be economically, simply andconveniently recovered in an environment-friendly way; the loss caused by a third phase extraction system is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and in particular relates to a method for treating the third phase in a hydrometallurgical extraction system. Background technique [0002] Any solvent extraction system will produce some flocculated dirt after a long period of operation. Depending on its density, it may float in a certain phase between the two phases, or even sink to the bottom of the tank. It is generally called interphase dirt or interphase dirt. things, but it is habitually called the "third phase" in production. The composition of the third phase is complex, mainly composed of aqueous phase, organic phase and solid. Due to the different extraction systems, the composition of the third phase is also quite different: the inorganic impurities in the extraction system such as trivalent iron, aluminum, etc. The third phase is formed by mixing the solids with the organic phase; the calcium, magnesium and ...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B23/00
CPCC22B23/0453C22B3/3842C22B3/3844C22B3/3846Y02P10/20
Inventor 欧建中王小丰张学飞田建华徐军辉苏尚锷
Owner 广西银亿新材料有限公司
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