The molten mixture obtained after smelting of copper pyrite ore in blast furnace is called as matte. It contains Cu 2S and FeS. 7. What is blister copper? Why is it so called? Ans. The variety of copper obtained after bessemerisation of matte is called blister copper which is about 98% pure copper.
Copper refining requires putting mined rock through several processing stages. Here's an overview of how that happens. Mined rock typically contains less than 1 percent copper. That means that ...
ISASMELT and KIVCET, which replace roasting and smelting. For converting, the PierceSmith and Hoboken converters are the most common processes. The matte from the furnace is charged to converters, where the molten material is oxidized in the presence of air to remove the iron and sulfur impurities (as converter slag) and to form blister copper.
The final product is a blister copper. Anode Furnace and Casting Area Fire refining is demonstrated in the anode furnace. This involves the removal of sulfur and oxygen from liquid blister copper by air oxidation removal sulfur (CuOS system, or sulfur removal) in the form of SO 2 and hydrocarbonreduction removal of copper (oxygen 11
Ore dressing. Is the sum total of treatments to which ores are subjected in order to separate an discard the worthless fractions by physical means. Ore dressing/ beneficiation. The process of removing as much gangue as possible just after the ore is mined.
Smelting Autoclaves Refining Enviromental Issues Thickening Milling Grinding Slide 2 / 241 Your robust and reliable choice for the Mining industry Offering cost reduction solutions to save energy and raw material to reduce downtime to reduce maintenance Environmental protection using pH analysis systems
The Smelting of Copper The first written account of the processes of smelting and refining of copper is to be found in the 12th On smelting: Copper is engendered in the earth. When a vein of which is found, it is acquired with the greatest labour by digging and breaking. It is a stone of
Oct 26, 2012· Summary. Roasting and smelting chemistries are discussed in light of experimental results and commercial process control requirements. Until now, significant copper losses to the slag, as well as intolerably high As, Bi, and Sb impurity levels in the copper have impeded the progress of direct smelting.
Copper is extracted from its ores by chemical processes that involve heat or electricity (roasting ores in a smelter furnace and purification by electrolysis all the details below). Because of its position in the reactivity series of metals, copper can be extracted using carbon in a smelting furnace.
Nickel Smelting and Refining Industry Description and Practices ... conjunction with copper bearing ores, are mined from underground. Following is a ... after the reduction roast step. Sulfidic ore processing Modern technology uses electric smelting or flash smelting. Flash smelting is the most
is to decrease the sulphur content to an optimwn level for smelting to a matte. Partial (oxidizing) roasting is accomplished by controlling the access of air to the concentrate; a predetermined amount ofsulphur is removed, and only part ofthe iron sulphide is oxidized, leaving .
Lead Blast Furnace Smelting Selective Roasting Reverberatory Smelting Hydrometallurgical Treatment of Complex Sulphides Solvent Extraction Compounds of Zinc and Cadmium 10. LEAD Uses Extraction of Lead Occurrence Treatment of Ore and Production of Metal Treatment of Base Bullion Drossing Parke's Process for Desilverization of Lead
The flash smelting process consists of the following technological operations: l preparation of a charge of proper grain size and moisture content below % of H 2 O, l smelting of copper concentrate in the flash smelting furnace, aimed at production of blister copper, l copper removal from the .
The slag from this process is rich in copper oxides and together with the slags from processes 6 and 8 is reused in process 4. Sometimes the roasting is repeated up to four times, in which case the calcining and smelting of processes 5 and 6 are omitted. 8. Refining or toughening the copper.
Dec 20, 1983· Dead roastoxide flash reduction process for copper concentrates ... The method of claim 7 wherein SO 2 containing gases generated during said roasting and said reduction flash smelting are combined for recovery. ... Blister copper from the furnace flows directly by heated launder to one of the two anode furnaces.
BESSEMERIZATION 2Cu2S + 3O2 è 2Cu2O + 2SO2 2Cu2O + Cu2Sè 6Cu + SO2 REFINING OF COPPER Blistercopper is refined by electrolysis. Blocks of blister copper are used as anodes and thin sheets of pure copper act as cathodes.
An example where copper is further purified is at the Asarco electrolytic plant in Amarillo, Texas. The 99% pure copper from the anode furnace is cast into 750pound, 3inch thick, rectangular slabs called anodes. The final step is a process called electrorefining.
However, if a partial roasting process is employed the desirable metallic mineral will still be in the form of a sulfide, and a reduction of sulfide ore is the process of choice, as in the case of copper sulfide ores.
The final step consists of fire refining the blister copper to reduce the sulfur and oxygen to even lower levels. This oxidationreduction process is usually carried out in a separate furnace to ensure that the final smelter product reaches the level of percent copper that is required for electrolytic refining.
Blocks of blister copper are used as anodes and thin sheets of pure copper act as cathodes. The cathode plates are coated with graphite in order to remove depositing copper. The electrolyte is copper sulphate (CuSO4) mixed with a little amount of H2SO4 to increase the electrical conductivity.
Fire refining lowers the sulphur and oxygen levels in blister copper and removes the impurities as slag or volatile products. Reverberatory or rotary furnaces are used. First, air is blown through the molten mixture to oxidize the copper and volatilize the sulphur impurities, producing a small amount of slag.