Copper solvent extraction reagent, Nickel Cobalt extractant, D2EHPA & Rare earth leaching solvent

Machine centrifugal extraction solvent extraction from precious metals recovery of precious metals in waste liquid separation

by:Deyuan      2020-08-26
Platinum group metal unique properties make it widely used. But the platinum group metal resources in China is limited, therefore, from the secondary resources recycling is more and more important. Solvent extraction as a kind of effective method of extraction and separation of precious metals has been applied to the secondary resource recycling, including development of new extraction solvent and extraction technology is the key to the technology. Usually also called liquid-liquid extraction, solvent extraction is a kind of from a solution of separation, enrichment, the effective method to extract useful substances, it USES the solute again not in solubility of liquid between two different allocation to achieve the purpose of separation and enrichment.
metal solvent extraction began in the nineteenth century, nowadays, solvent extraction has been recognized as scholars both at home and abroad is an advanced method of purification and separation of precious metals, is a kind of high and new technology of separation science. It compared with the traditional precipitation process short, large capacity, good separation effect, high metal recovery, low consumption, low cost, good working conditions, easy operation, continuous automatic conveviently. Its application field is more and more widely, not only as a means of separation and purification of metal, and gradually into the miscellaneous scrap metal recycling and metal containing wastewater treatment and other fields, from mining and recovery of platinum group metals in secondary resources is the important application in the field of solvent extraction. Development of non-toxic and effective new technology of extraction solvent and extraction, purification, separation of platinum group metals is always the key point of the research, he to relieve the shortage of platinum group metal resources in China provide a effective way, has very important practical significance.
because of physical, chemical properties of platinum group metals are very similar, and valence, mercurial properties vary widely between different valence state; As a result, platinum group metals separation has always been a difficult problem in metallurgy. Before the 70 s with the traditional mainly precipitation separation, purification and refining process of the technological process, high yield and low cost, long operating troubles, part of the backlog of precious metals were stranded in the process of production, economic benefits is affected. Since the solvent extraction separation technology shows its superiority and application of the extraction and separation and purification of the platinum group metal aroused people's great attention, and this method has been recognized as new technology of extraction and separation of platinum group metals.
solvent extraction in industry for platinum group metal refining is dibutyl carbitol extraction process. Tianyi extraction using. cwl - M type centrifugal extraction machine solvent extraction to extract the platinum group metals.
    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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