Method and arrangement for producing metal powder
A metal powder and metal technology, applied in the field of dissolution-precipitation method and device for preparing metal powder, can solve the problems of weakening process kinetics and efficiency control, complex methods and devices, etc., to achieve improved reliability, easy recovery, The effect of reducing the amount of energy
Inactive Publication Date: 2012-10-10
OUTOTEC OYJ
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Problems solved by technology
In the process, the dissolution of the noble metal also takes place in the reaction of the additional metal, which weakens the control of the process kinetics and its efficiency, and makes the methods and devices used therein quite complex
Method used
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[0064] by using the basis image 3 method shown in the block diagram, essentially embodies the figure 2 Copper powder is produced in an apparatus of the type shown in by using an aqueous solution of sulfuric acid as a starting solution containing V 3+ cation. In this starting solution, the measured concentration of sulfuric acid was about 500 g / l and the measured concentration of vanadium was about 16 g / l. The supply material used was grade A cathode copper plate which also served as the anode of the electrolytic cell. The cathode used was a lead plate with a size of 275mm x 130mm. In the test conditions, the solution temperature was approximately 20-35°C.
[0065] The starting solution is fed into the electrolytic cell where the copper anode is oxidized and dissolved in the anolyte. The measured content of dissolved copper was approximately 4 g / l. Thereafter the anolyte solution is introduced from the anode side and the catholyte solution from the cathode side into a p...
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The invention provides a method and an arrangement for producing metal powder. In the method, dissolved utility metal is mixed in a solution containing at least one intermediary metal for precipitating the dissolved utility metal into a utility metal powder (14). In the method, the first part of an acid-containing starting solution is fed on the anode side (6) of an electrolytic cell as anolyte (1), to get in contact with the anode and the supply material containing yield metal, and the second part of the acid-containing starting solution, which also contains intermediary metal, is fed on the cathode side (8) of the electrolytic cell, to get in contact with the cathode (4) as catholyte (3); yield metal is oxidized and dissolved in the anolyte (1) by leading electric current in the anode (2); the yield metal contained in the second part of the starting solution is reduced on the cathode side (8); and anolyte solution and catholyte solution are fed in a precipitating chamber (12) for mixing the dissolved, oxidized yield metal and the second part of the starting solution containing reduced intermediary metal.
Description
field of invention [0001] The present invention relates to the preparation of finely divided metal powders. In particular, the present invention relates to a dissolution-precipitation method and apparatus for the preparation of metal powders. Background of the invention [0002] Typically, the end product in many metal fabrication processes is a plate-like object in the form of a cathode. End products of this type are obtained, for example, by pyrometallurgical production routes using electrolysis. In these methods, metal anodes produced by pyrometallurgy from concentrates are electrolytically refined into copper cathodes, which can for example be cast into products in a variety of different forms. These types of processes can be used to make copper, nickel or cobalt products, among others. [0003] However, in the production of metals it is in many cases advantageous if the metal obtained as the end product of the manufacturing process is obtained in some other form than...
Claims
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IPC IPC(8): B22F9/24C25C1/00
CPCB22F9/24C25C5/02C25C3/26C25B1/00C25C1/00
Inventor V·尼米南H·维尔塔南
Owner OUTOTEC OYJ