In cases such as the Sudbury deposit, where the copper content of the ore is almost equal to that of nickel, the concentrate is subjected to a second selective flotation whereby the copper is floated to produce a low-nickel copper concentrate and a separate nickel concentrate, each to be processed in its respective smelting line. Best answer. Method used for refining of nickel metal is Mond’s process. In carbonyl refining, carbon monoxide is passed through the matte, yielding nickel and iron carbonyls [Ni(CO)4 and Fe(CO)5]. 229910052759 nickel Inorganic materials 0.000 title description 74 239000010950 nickel Substances 0.000 title description 74 Method of producing pure nickel by electrolytic refining This video is unavailable. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. However, the majority of laterite smelters produce a crude ferronickel, which, after refining to remove impurities such as silicon, carbon, and phosphorus, is marketed as an alloying agent in steel manufacture. The most important and most widely used method for refining impure metals is called electrolytic refining.. In some plants, sufficient sulfur is added to produce a furnace matte that can be further processed like matte from a sulfide smelter.
(iii) What is the role of coke in the extraction of iron from its oxides? Sulfide ores are crushed and ground in order to liberate nickel minerals from the waste materials by selective flotation. In this process nickel is heated in a steam of carbon monoxide, which yields in the formation of nickel carbonyl. Answer of Describe a method for refining nickel. Nickel concentrates may be leached with sulfuric acid or ammonia, or they may be dried and smelted in flash and bath processes, as is the case with copper. In addition, they contain large amounts of water (in the range of 35 to 40 percent) as moisture and chemically bound in the form of hydroxides. • What is the name of this process? Various processes are used to treat nickel matte. Skip navigation Sign in. Outotec® Nickel Flash Smelting Process is a benchmark nickel-smelting method and a clear global leader in the world’s primary nickel production from sulfide raw materials. NCERT NCERT Exemplar NCERT Fingertips Errorless Vol … Physics. Chemistry. You may need to download version 2.0 now from the Chrome Web Store. Log in. Dryers 50 metres long and 5.5 metres in diameter are common, while reduction kilns 5 to 6 metres in diameter and more than 100 metres long are required to handle the large tonnages of ore and to provide the necessary retention time. Search. Method of electrolytic refining rough Nickel, including electrolysis with soluble anodes of rough Nickel, cleaning solutions from impurities, deficit reduction of Nickel in the electrolyte, characterized in that to compensate for the deficiency of Nickel in the electrolyte used solution from the leaching of secondary materials containing Nickel, cobalt and other metals, the sulfate-chloride electrolyte to the first stage … Describe a method for refining nickel. Performance & security by Cloudflare, Please complete the security check to access. Describe a method for refining nickel. Fluid bed roasting and a chlorine-hydrogen reduction will produce high grade nickel oxides (95%+ nickel). NaOH to form sodium aluminate and leaving impurities behind. Drying of moisture and removal of the chemically bound water are therefore major operations.
(ii) In the extraction of Al, impure is dissolved in conc. Watch Queue Queue. At the first stage, initial metallic nickel is subjected to zone chlorination. The refining of metallic nickel ends in the growth of high-purity nickel single crystals using crucibleless electron-beam zone melting. Nickel refining Various processes are used to refine nickel matte. 213, 214). A side-blown copper-nickel matte converter. A method of refining scrap of a high-melting-point metal alloy, especially a copper-nickel alloy, in which the scrap is heated in vacuo to a temperature lower than the smelting point of the scrap, at which impurities, e.g. The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. Because the conversion of nickel sulfide directly to metal would require an extremely high temperature (in excess of 1,600 °C [2,910 °F]), the removal of sulfur at this stage of the converting process is controlled in order to produce the 70–75 percent nickel matte, which has a lower melting point. The high magnesia content in most laterite ores and the liquidus temperature of the furnace products necessitate these higher smelting temperatures, which in turn make necessary an extensive system of cooling blocks within the refractory lining of the furnace. Sulfide deposits are usually mined by underground techniques in a manner similar to copper, although some deposits have been mined using open pits in the early stages. • If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. 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