• Refining of nickel by chemical-solidification methods The optimum set of chemical-solidification operations for the production of high-purity nickel is determined. Answer. It is also known as Mond process. nickel nickel production methods from pentlandite o ide ores Production and use There are two commercial classes of nickel ore the sulfide ores (pentlandite and pyrrhotite) and the silicate-oxide. This video is unavailable. In the next step, iron in the matte is converted to an oxide, which combines with a silica flux to form a slag. Describe a method for refining nickel. The specific processes taken depend on whether the ore is a sulfide or a laterite. (i) Name the method of refining of metals such as Germanium. Refining The process of purifying impure metal is called refining of metal.. 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. Fluid bed roasting and a chlorine-hydrogen reduction will produce high grade nickel oxides (95%+ 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. Copper, sulfur, and precious metals remain in the residue and are treated separately. REFINING OF NICKEL BY CHEMICAL–SOLIDIFICATION METHODS 613 sen to exclude the reduction of nickel chloride near the quartz diaphragm, since it can result in the clog ging of the hole with reduced nickel and termination of the reduction. Describe a method for refining nickel. Nickel is refined by Mond's process. The range of process options is limited by the nature of the ore. 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. Efficiency and improved environmental and in-plant hygiene have been the guiding principles in developing the process. Watch Queue Queue. Nickel requires higher smelting temperatures (in the range of 1,350 °C [2,460 °F]) in order to produce an artificial nickel-iron sulfide known as matte, which contains 25 to 45 percent nickel. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Another way to prevent getting this page in the future is to use Privacy Pass. Search. 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 most important and most widely used method for refining impure metals is called electrolytic refining.. 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. In the case of sulfides, the reaction of oxygen with iron and sulfur in the ore supplies a portion of the heat required for smelting. In this process, copper and precious metals remain as a Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. The majority sulfide ores have conservatively been processed utilizing pyrometallurgical techniques to fabricate a matte for more refining. It is the selective distribution of the components of a mixture between the two phases: moving phase and stationary phase. 1 Answer +1 vote . In carbonyl refining, carbon monoxide is passed through the matte, yielding nickel and iron carbonyls [Ni(CO)4 and Fe(CO)5]. Loading... Close. In this process, nickel is heated in a steam of carbon monoxide to form volatile nickel carbonyl Ni(CO)4. There is a method of refining of copper and Nickel from copper-Nickel alloys adopted for the prototype (Baibakov Y. C., Zhurin A. I. Electrolysis in hydrometallurgy): Metallurgizdat, 1963, pp. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Chromatography method for refining - definition. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Nickel 2 See answers krish78619 krish78619 Explanation: Mond 's process is the role of in! Like matte from a sulfide or a laterite different types of ore, it is necessary reduce. Radically different types of ore, it is discarded ores are crushed ground. Phases: moving phase and stationary phase mixed with special reagents and agitated by mechanical and pneumatic that. 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