Copper solvent extraction reagent, Nickel Cobalt extractant, DEHPA & Rare earth leaching solvent

Wet smelting equipment solvent extraction separation of rare earth elements and rare metal indium gallium

by:Deyuan      2020-09-10
Rare earth elements are very active metal, chemical properties are very similar, common to + 3 valence, the hydrated ion have color mostly, easy to form stable compounds. With the application of rare earth elements is more and more widely, extraction separation between rare earth elements become particularly important. The solvent extraction of rare earth elements is a better method is the separation of rare earth, people not only all kinds of extraction agent, was synthesized and the influence of chemical structure on the extraction performance has conducted many studies. Now the main research application of synergistic extraction technology of extraction separation of rare earth elements.
extraction of rare earth element extraction agent mainly phosphorus, amine, and carboxylic acid class to give priority to. Acid ( Phosphine) Acid ester is the main rare earth extraction agent. The TBP as neutral phosphorus ( Phosphine) The representative of the extraction agent is used for separating rare earth elements first neutral phosphorus ( Phosphine) Kind of extraction solvent, the extraction mechanism of rare earth elements it to neutral complexing extraction. Amine extraction is through its salts and metal complexing anion exchange. And carboxylic acid extraction solvent, extraction of distribution coefficient rises along with the increase of metal ions, charge density, when ionic charge phase at the same time, increases with increasing ionic radius.
90% of the world's gallium is currently as a by-product of smelting aluminium industry, the remaining 10% mainly from the residue of zinc smelting recovery, a small amount from some coal recovery. Using solvent extraction separation and enrichment of gallium compounds is one of the important methods to extract gallium. The main source of indium from the sphalerite in the residue after extracting zinc, dissolve the residue after using hydroxyl or enrichment indium sulfide precipitation, dissolved the precipitation, and then use. cwl - M type centrifugal extraction solvent extraction, the extraction method of extracting indium. With the development of solvent extraction method, is applied to the analysis and extraction agent in industrial production is becoming more and more used for extraction, separation and recovery of gallium indium extraction agent mainly include acid ( Phosphine) Kind of extractant, neutral phosphorus ( Phosphine) Extraction agent and organic amine extractant and carboxylic acid extraction agent etc.
although can be used for extraction separation, the extraction of indium gallium is very much, but extraction separation process is complicated, it is difficult to applied in actual production process. Now more and more synergistic extraction system is applied to the separation of indium gallium, not only improve the extraction efficiency, simplify the extraction conditions. And purification of indium gallium can be gotten.
CWL - The 350 series centrifugal extraction machine working principle:
( 1)
weight two-phase mixing and mass transfer process solution according to certain proportion respectively from two feeding tube into the drum and shell type ring gap formed between the mixed zone, with the aid of the rotation of the drum, through the turbine disc and the impeller to make two phase mixing and dispersing quickly, two phase solution fully mass transfer. Complete mixing and mass transfer process.
( 2)
mixture two-phase separation process under the action of vortex disk into the rotary drum, in the plate to form the bulkhead area, mixture quickly with synchronous rotary drum, in under the action of centrifugal force, the heavier than major phase fluid in the process of upward mobility and gradually away from the drum center on the drum wall; Small proportion of liquid phase gradually away from the drum wall and on to the center, after clarification of two phase fluid end respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete two phase separation process.
CWL - Description of 350 series centrifugal extraction machine performance characteristics:
1. CWL - 350 series centrifugal extraction machine used in the extraction process of medium-sized enterprise, can be single stage operation can multistage continuous countercurrent operation, can be designed and manufactured according to customer needs we will be able to drum diameter is 250 mm Any centrifugal extraction machine, 350 mm. cwl - The 350 series centrifugal extraction machine drum diameter is 350 mm.
2。 This device is speed used system wide range high separation factor. Mainly used in the extraction process of medium-sized businesses, such as: waste water containing phenol extraction and reverse extraction process.
3。 Mainly used in the extraction process of medium-sized businesses, can completely solve the various extraction process of medium-sized enterprise
4. This device can be intermittent operation, a single operation, can also according to the process need many sets of series operation, unlimited number, simple installation, operation and maintenance.
5。 Reliable continuous countercurrent flow of implementation is imposed by the mixing chamber of the suction force, does not need the other set interstage pump.
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