Answer. Ask your question. 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. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating temperatures in nickel production. 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. This is done in electrolytic cells equipped with diaphragm compartments to prevent the passage of impurities from anode to cathode. 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. 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. Your IP: 146.185.145.201 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. Fluid bed roasting and a chlorine-hydrogen reduction will produce high grade nickel oxides (95%+ nickel). (i) Name the method of refining of nickel. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. With nickel found in two radically different types of ore, it is not surprising that the mining methods differ. Watch Queue Queue. From tools to technology, mining has evolved from near-primitive methods to a highly advanced, technology-based process allowing us to increase nickel production ten times over. 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 … 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. • 213, 214). The waste material, or tailings, is frequently run through a second cleaning step before it is discarded. As these rise through the mixture, the sulfide particles adhere to their surfaces and are collected as a concentrate containing 6 to 12 percent nickel. The method for refining nickel involves the following: Ni is heated with C O to form volatile nickel tetracarbonyl. Therefore, the crude metal is […] Britannica now has a site just for parents. Metal should form a volatile compound with a suitable reagent. 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. 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.
(ii) In the extraction of Al, impure is dissolved in conc. Join now. (ii) What is the role of cryolite in the ... role of limestone in the extraction of iron from its oxides This video is unavailable. Being free of sulfur, laterite nickel deposits do not cause a pollution problem as do the sulfide ores, but they do require substantial energy input, and their mining can have a detrimental effect on the environment (e.g., soil erosion). Nickel carbonyl is a very toxic and volatile vapour that, after purification, is decomposed on pure nickel pellets to produce nickel shot. Solution for Name the method used for the refining of Nickel metal. 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. Best answer. The most important and most widely used method for refining impure metals is called electrolytic refining.. Compact mining equipment that’s cost-effective and stands up to the test of time has positively impacted mining efficiency and production. Skip navigation Sign in. For example, Nickel is refined using this method. Many metals like copper, zinc, tin, lead, nickel, silver, gold are refined electrolytically.. For the refining of an impure metal by electrolysis: In this process, copper and precious metals remain as a Please enable Cookies and reload the page. 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. Search. One process is the ammonia pressure leach, in which nickel is recovered from solution using hydrogen reduction, and the sulfur is recovered as ammonium sulfate for use as fertilizer. 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