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1,522,000 metric tons of fine copper in 2002, approximately one half of total copper concentrate production, with a notorious environmental impact due to the great amount of slag …
Discard slag may contain 0.5–0.7% copper and is frequently used as construction material or for sandblasting. Leaching processes produce residues, while ef-fluent treatment results in sludges, which can be sent for metals recovery. The smelting process typically produces less than 3 tons of solid waste per ton of copper produced.
recover of copper and molybdenum from a slag [17]. Selective recovery of copper metal requires an oxygen potential below 10-6 atm. In the case of copper, increasing of oxygen potential must ensure to obtain the metal at around 10-6 atm, but at this level, also iron will largely present as magnetite. Molybdenum metal
The slag cools quickly and tends to break into pieces by itself. It will be recovered and sent back through the mill and concentrator to recover any copper that might have been trapped in the slag. The Converter Furnace In the converter, air is blown into the matte to burn away the iron and any remaining sulfur.
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12.3 Primary Copper Smelting 12.3.1 General1 Copper ore is produced in 13 states. In 1989, Arizona produced 60 percent of the total ... charge material of copper concentrate mixed with a siliceous flux (often a low-grade copper ore) is ... Because copper has a higher affinity for sulfur than oxygen, the copper in the slag (as copper oxide) is ...
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Recent operation and environmental control in the Kennecott Smelter C. J. Newman, D. N. Collins, and A. J. Weddick ... Copper concentrate is smelted in an Outokumpu ... The only solid wastes produced from the plant are tailings from the slag concentrator and from the smelter hydro-metallurgical plant. The latter processes a
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The copper oxide minimum minerals are dissolved by the acid to give a blue copper rich solution mainly of copper sulfate. This solution is tapped off from the bottom of the pad and placed into big tanks with steel plates an electrical current is passed from the tank to the steel which is then electroplated with pure copper.
concentrate these trace metals. If some of these are radioactive, the resultant slag may have a significant gamma activity. ... Six copper slag and 2 coal slag abrasive products from 6 different suppliers were selected for evaluation. A G-40 steel grit was used as a control.
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The ore is crushed in the pit and moved by conveyer belt to the Copperton Concentrator. At the Concentrator, the ore is ground in huge mills using steel balls and the copper is concentrated by flotation to produce a concentrate of about 28% copper. The concentrate is transported 17 miles to the smelter via a slurry pipeline.
Energy and Environmental Profile of the U.S. Mining Industry RCRA special waste. Special wastes are excluded from the RCRA statute. The slags from some smelting furnaces are higher in copper content than the original ores taken from the mines. Therefore, they may be sent to a concentrator for copper recovery.
Mopani decided to install a copper ISASMELT plant that could treat 850,000 t/y of copper concentrate, including a purpose-designed electric matte settling furnace to separate the ISASMELT matte and slag and also return slag from the smelter's Peirce-Smith converters.
Fuyang Zhongtong Nonferrous Metals Co.Ltd. (Morocco) 300tons/day Copper Ore Dressing Project Global case Zhejiang gold machinery factory is domestic a type of enterprise, advanced enterprises in Zhejiang with total assets of 150 million yuan.
Characteristics and utilisation of copper slag—a review. Author links open overlay panel Bipra Gorai R.K. Jana Premchand. ... Copper slag has been carbothermally smelted in a submerged electric arc furnace, ... grinding and froth flotation methods in a White Pine concentrator. 7. Use of copper slag …
Recovery of Copper and Cobalt from Copper Slags as Selective 389 intervals. By treatment with hot water, recovery of copper and cobalt from the ore mixture was aimed selectively. 2. Experiment 2.1 Sample Preparation The slag sample used in this investigation is a composite from different levels of the copper slag
Optimization of the flotation of copper smelter slags from Namibia Custom Smelters' Slag Mill Plant ... To further investigate the nature of the refractory copper minerals in the slag, mineralogical ... Figure 2.3 Diffraction patterns of slag concentrate and constituent minerals. (a) Slag concentrate. (b) Metallic copper. (c) Bornite.
The copper losses in the slags from El Teniente pyrometallurgical process predicted by calculation from thermodynamic data has been compared with those determed by microscopic examination of the slag samples from El Teniente pyrometallurgical processes and some slag industrial data. El Teniente pyrometallurgical process
Copper can be lost from the matte in three ways: as cuprous oxide (Cu 2 O) dissolved in the slag, as sulfide copper dissolved in the slag or as tiny droplets (or prills) of matte suspended in the slag. The amount of copper lost as oxide copper increases as the oxygen potential of the slag increases.