In the metallurgy of which of the following cupellation process is used?Asked by: Eddie Prohaska
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(D) Iron. Hint: The cupellation process is used to extract a metal that belongs to the d-block. The cupellation method is usually used to extract a noble metal. The two metals that are extracted by the cupellation method have atomic number 47 and 79.View full answer
Likewise, What is Cupellation in metallurgy?
Cupellation, separation of gold or silver from impurities by melting the impure metal in a cupel (a flat, porous dish made of a refractory, or high-temperature-resistant, material) and then directing a blast of hot air on it in a special furnace.
Herein, What is used in metallurgical process?. Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form. Hydrometallurgy uses aqueous solutions to extract metals from ores ( leaching ). Pyrometallurgy involves high temperature processes where chemical reactions take place.
Keeping this in consideration, What is Cupellation method?
Cupellation is a refining process in metallurgy where ores or alloyed metals are treated under very high temperatures and have controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
What is a Cupel used for?
a small, cuplike, porous container, usually made of bone ash, used in assaying, as for separating gold and silver from lead.
The smelting and converting of copper sulfide concentrates result in a “blister” copper that contains 97 to 99 percent of the silver present in the original concentrate. Upon electrolytic refining of the copper, insoluble impurities, called slimes, gradually accumulate at the bottom of the refining tank.
Liquation, technique for separating constituents of an ore, a metal, or an alloy by partial melting. When the material is heated to a temperature where one of the constituents melts and the other remains solid, the liquid constituent can be drained off.
Parkes process (patented in 1850), involves adding Zinc to Lead and melting the two together. When stirred, the molten Zinc reacts and forms compounds with any Silver and Gold present in the Lead. These Zinc compounds are lighter than the lead and, on cooling, form a crust that can be readily removed.
The principle of zone refining is that the impurities in an ingot or ore of metal are more soluble in the melt state when compared to the corresponding solid state of the impurities. In the zone refining process, the impurities are concentrated at one end of the block of metal so that the rest of the block is purified.
Native gold and silver are very rare – they are usually found blended into lead ores. The cupellation process is one of the best ways to extract these precious metals. ... The newly formed lead oxide, or litharge, is absorbed by the cupel, leaving only precious metals behind.
Metallurgy consists of three general steps: (1) mining the ore, (2) separating and concentrating the metal or the metal-containing compound, and (3) reducing the ore to the metal. Additional processes are sometimes required to improve the mechanical properties of the metal or increase its purity.
The science of metallurgy is subdivided into two broad categories: chemical metallurgy and physical metallurgy. Chemical metallurgy is chiefly concerned with the reduction and oxidation of metals, and the chemical performance of metals.
Metallurgy process involves the refining of metals and the production of alloys of metals. The impurities present in the ore, which has to be separated in order to obtain desired metal from its ore during the process of extraction, are called gangue.
A metallurgical method employed in the purification of copper which contains copper oxide as an impurity and also in the purification of tin which contains tin oxide (stannic oxide or "SnO2") as an impurity.
Electrorefining is widely used for the purification and production of copper that is suitable for electrical applications. Such plants exist throughout the world on production scales between 1000 and 100 000 t/a.
Bessemerisation is a method in which the air is blown into the molten copper mat that is deposited in a Bessemer converter. In the final stage of smelting, the other products that remain, including FeS, are oxidized and removed as slag(FeSiO3).
: a technique for the purification of a crystalline material and especially a metal in which a molten region travels through the material to be refined, picks up impurities at its advancing edge, and then allows the purified part to recrystallize at its opposite edge.
The Mond process, sometimes known as the carbonyl process, is a technique created by Ludwig Mond in 1890, to extract and purify nickel. The process was used commercially before the end of the 19th century, and particularly by the International Nickel Company in the Sudbury Basin.
Mond process for refining of Nickel is based on the principle that nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile complex. Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a higher temperature (450 - 470 K) to obtain pure nickel metal.
It is often found in metallic ores that contain quantities of other metals, such as copper. To separate silver from an ore containing a quantity of copper, you need to heat the ore sample to a level sufficient to melt the silver but leave the copper in a still-solid state.
When zinc is added to liquid lead that contains silver as a contaminant, the silver preferentially migrates into the zinc. Because the zinc is immiscible in the lead it remains in a separate layer and is easily removed.
This process relies on the advantage of two liquid-state properties of zinc. The two advantages of using zinc are that first, it is immiscible with lead, and the other is that the solubility of silver in zinc is 3000 times more than the solubility of silver in lead.
This reaction includes reduction of copper (I) oxide by copper (I) sulphide. In this process, copper is reduced by itself hence this process is known as autoreduction and the solidified copper. So, obtained is known as blister copper.
Flux, in metallurgy, any substance introduced in the smelting of ores to promote fluidity and to remove objectionable impurities in the form of slag. Limestone is commonly used for this purpose in smelting iron ores. Other materials used as fluxes are silica, dolomite, lime, borax, and fluorite.
Liquation is a metallurgical method for separating metals from an ore or alloy. This method was largely used to separate silver from copper using lead, but it can also be used to remove antimony minerals from ore, and refine tin. ...