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Roasting reduces impurities in the copper ore and produces calcine a mixture of products concentrated enriched ore is heated to between 500 o c and 700 o c in air some impurities in the ore such as arsenic and antimony are oxidized and form volatile gases which can be removed
In copper processing roasting smelting and converting various fluxing materials such as lizenithne or iron ore are mixed with the ore concentrate 138 ni was roasted at 800 176c for 220 min coal and the corresponding recoveries of nickel and iron were chat now
The froth is skimmed off the surface and the enriched ore mainly the copper mineral is taken away for roasting the mixture of water foaming agent and paraffin is recycled after this stage the enriched ore now contains about 25 copper by mass and is called copper concentrate
Historically smelting and roasting of ores have been used to capture the gold from difficult to treat ores just like those old time miners we dont want to throw any of the silver or gold away as it can be valuable treating high sulfide ore is a difficult proposition and in the article below ill take a look at all of the best known
Sulphating roasting is a unit operation in the production process for copper and cobalt from sulphidic ores the simplified block diagram in figure 1 shows that roasting is the first stage in the process flow sheet the objective of roasting is a selective sulphation of copper and cobalt while ferrous minerals and components are oxidized to
Copper processing is a complicated process that begins with mining of the ore less than 1 copper and ends with sheets of 9999 pure copper called cathodes which will ultimately be made into products for everyday usethe most common types of ore copper oxide and copper sulfide undergo two different processes hydrometallurgy and pyrometallurgy respectively due to the different
Sep 06 2007nbsp018332copper metal can be prepared by quotroastingquot copper ore which usually consists of a mixture of cuprite cu2s and copperii sulfide cu2ss o2g 2 cus so2g cuss o2g cus so2g suppose a sample of copper ore contains 110 by mass impurities in addition to a mixture of cu2s and cus heating 1000 g of the impure ore produces 754 g of copper metal with a purity of
The extraction of copper from copper ore is done by reduction with carbon but the copper produced is not pure enough for use as a conductor so it is purefied using electrolysis asked in metal
Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates process steps include mining concentration roasting smelting converting and finally fire and electrolytic refining 1232 process description2
Y m zhao et al 10 process becomes the most viable and promising approach to treat copper sulfide ore in metallurgy fields in h y
Processes copper mining and production copper is found in natural ore deposits around the world this page explains copper mining the production route taken from orecontaining rock to a final product that is the highest
Jul 30 2012183 copper metal can be prepared by roasting copper ore which can contain curprite and copper 2 sulfide cu2s o2gt 2cu so2 cus o2
Roasting or heating in air without fusion transforms sulfide ores into oxides the sulfur escaping as sulfur dioxide a gas smelting qv is the process used in blast furnaces to reduce iron ores tin copper and lead ores are also smelted in metallurgy roasting
In copper processing roasting smelting and converting various fluxing materials such as lizenithne or iron ore are mixed with the ore concentrate 138 ni was roasted at 800 176c for 220 min coal and the corresponding recoveries of nickel and iron were chat now
Copper is found in the free metallic state in nature this native copper is the material that humans employed as a substitute for stone from it they fashioned
The concentrated enriched ore can contain up to 35 copper and a number of impurities such as antimony arsenic and lead roasting reduces impurities in the copper ore and produces calcine a mixture of products concentrated enriched ore is heated to between 500 o c and 700 o c in air
The froth is skimmed off the surface and the enriched ore mainly the copper mineral is taken away for roasting the mixture of water foaming agent and paraffin is recycled after this stage the enriched ore now contains about 25 copper by mass and is called copper concentrate
The principal ore of copper is copper pyrite and copper is extracted from this ore the different steps in extraction of copper are crushing and concentration roasting smelting and bassemerisation
Heating ores to elevated temperatures is called roasting and it causes the oxygen in the air to convert the sulfur in the ore to sulfur dioxide which is a gas and is emitted to the air the process works best when the ore is crushed to small pieces before roasting
About 7 tons of fuel was consumed per 24 hr for a rated furnace capacity of 120 tons of ore which is equivalent to 117 lb of coal per ton of ore roasted the feed carried 3 to 4 per cent moisture and the roasting temperature varied between 600 and 650176c the time of contact was close to 5189 hr
Copper processing is a complicated process that begins with mining of the ore less than 1 copper and ends with sheets of 9999 pure copper called cathodes which will ultimately be made into products for everyday usethe most common types of ore copper oxide and copper sulfide undergo two different processes hydrometallurgy and pyrometallurgy respectively due to the different
In copper processing roasting smelting and converting various fluxing materials such as lizenithne or iron ore are mixed with the ore concentrate 138 ni was roasted at 800 176c for 220 min coal and the corresponding recoveries of nickel and iron were chat now
Through this study 95 copper and 90 cobalt were shown to be leachable from a drc coppercobalt ore by ammonium roasting at the following optimal conditions the particle size of 010 mm chlorine ammonium to ore mass ratio of 12 roasting temperature of 300 176c roasting time of 3 h leaching time of 05 h and leaching temperature of 60
Copper metal can be prepared by roasting copper ore which can contain cuprite cu2s and copperii sulfide cu2ss o2g gt 2 cus so2g cuss o2g
Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions but a very high extraction can be obtained if the copper ore is in the oxidized condition the problem is to convert the sulphide into the oxide form this can be done
Generally copper extraction follows the sequence see figure below 1 beneficiation by froth flotation of ore to give copper concentrate optional partial roasting to obtain oxidized material or calcines 2 two
From sulphide ore large amount of copper are obtained from copper pyrite cufes2 by smelting ores containing 4 or more copper are treated by smelting process very poor ores roasting othe concentrated ore is then roasted in a furnace between 500oc and 700 c in the presence of a current of air sulphur is oxidized to so 2
Process for treating refractory gold ores by roasting under oxidizing conditions article in minerals and metallurgical processing 1711
Full text of quotroasting of gold and silver ores and the extraction of their respective metals without quicksilverquot see other formats
Oct 04 2014nbsp018332this process is generally applied to sulphide minerals during roasting the sulfide is converted to an oxide and sulfur is released as sulfur dioxide a gas 5 for the ores cu2s chalcocite and zns sphalerite balanced equations for the roasting are
