fastf fasts from mackey et al 2002
defond et al - 2002 - do non–audit service fees impair auditor independence - evidence from going concern audit opinions
... exchange BETA = the firm’s beta estimated using a market model over the fiscal year RETURN = the firm’s stock return over the fiscal year VOLATILITY = the variance of the residual from the market model ... exchange BETA = the firm’s beta estimated using a market model over the fiscal year RETURN = the firm’s stock return over the fiscal year VOLATILITY = the variance of the residual from the market model ... fiscal year-end INSTITUTIONAL = the percentage of institutional holdings at fiscal year end SPECIAL ITEMS = indicator variable equal to the absolute value of negative special items divided by total...
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extractive metallurgy of copper 4th ed w davenport et al 2002 ppt
... a lesser extent Copper metal is usually produced from these minerals by hydrometallurgical methods, Fig 1.2 Hydrometallurgy is also used to produce copper metal from chalcocite, Cu2S A third major ... minerals are treated by the Fig 1.1 flowsheet, i.e pyrometallurgically.Carbonates, chlorides, oxides, silicates and sulfates are treated by the Fig 1.2 flowsheet, i.e hydrometallurgically Chalcocite ... Fig 1.2 Hydrometallurgical heap leach copper extraction flowsheet for 'oxide' and chalcocite ores 4 Extractive Metallurgy o Copper f (a) isolating an ore's Cu-Fe-S (and Cu-S) mineral particles...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 1 pot
... Fig 1.2 Hydrometallurgical heap leach copper extraction flowsheet for 'oxide' and chalcocite ores 4 Extractive Metallurgy o Copper f (a) isolating an ore's Cu-Fe-S (and Cu-S) mineral particles ... or promotional purposes, resale, and all forms of document delivery Special rates are available for educational institutions that wish to make photocopies for non-profit educational classroom ... Fourth edition 1916 1980 1994 2002 British Library Cataloguing in Publication Data Davenport, W G (William George) Extractive metallurgy of copper 4th ed 1.Copper - Metallurgy 1.Title II.King, M...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 2 doc
... minerals are treated by the Fig 1.1 flowsheet, i.e pyrometallurgically.Carbonates, chlorides, oxides, silicates and sulfates are treated by the Fig 1.2 flowsheet, i.e hydrometallurgically Chalcocite ... minimizes electrical energy consumption Ball mills tumble iron or steel balls The balls are initially to 10 cm diameter They gradually wear away as grinding proceeds Ball mills typically contain about ... this reason, all ores destined for pyrometallurgical processing are physically concentrated before smelting The product is concentrate containing -30% Cu (virtually all in sulfide minerals) Ores...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 3 ppt
... International Conference, Vol II, Mineral Processing/Environment, Health and Safety, TMS, Warrendale, PA Herbst, J A (2000) Control 2000, Mineral and Metallurgical Processing, SME, Littleton, CO ... minerals from nonsulfide ‘rock’ and Fe-sulfide minerals Many Cu deposits also contain molybdenite Others contain sphalerite (ZnS) and galena (PbS) These can all be separated from Cu minerals by ... xemoving 'rock' from the final concentrate (Toro et al. , 1993) 50 Extractive Metallurgy of Copper - Downcomer feed pump Recycle Air from atmosphere ' Cell level control via dart valve Final tailing...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 4 pps
... refractory retention and magnetite-slag deposition (Voermann et al. , 1999; Kojo, et al. , 2000; Merry et al. , 2000) Jackets are typically 0.75 m x 0.75 m x 0.1 m thick with 0.03 m diameter, 0.004 m wall ... the Third f International Conference, Vol l V Pyrometallurgy o Copper, ed Chen, W.J., Dim, C., f Luraschi, A and Mackey, P.J., The Metallurgical Society of CIM, Montreal, Canada, 423 437 References ... Extractive Metallurgy of Copper valuable It is nearly always recycled to the smelting furnace, but it may be treated hydrometallurgically to recover Cu and remove deleterious impurities from the...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 5 ppt
... 12001xx/xx 40-50 (all recycled) 121511 1511243 0-10 coal in solid 5-10 metallurgical coke in solid charge 119011 19011200 26 kg coal Nm’ natural gas charge i 7n 106 Extractive Metallurgy of Copper ... of the Third International Conference, Volume IV Pyrometallurgy of Copper, ed Chen, W.J., Diaz, C., Luraschi, A and Mackey, P.J., The Metallurgical Society of CIM, Montreal, Canada, 83 101 Harris, ... of the Third International Conference, Volume IV Pyrometallurgy of Copper, ed Chen, W.J., Diaz, C., Luraschi, A and Mackey, P.J., The Metallurgical Society of CIM, Montreal, Canada, 281 298 Mikron...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 6 potx
... Proceedings ofthe Third International Conference, Vol IV Pyrometallurgy o Copper, ed Chen, W.J Diaz, C., Luraschi, A., and Mackey, P.J., The Metallurgical Society of CIM, Montreal, 117 132 Hughes, S (2000) ... analyses of converter raw materials and products, mass% The data are from recent industrial surveys and Johnson et al. , 1979, Pannel, 1987 and Lehner, et al. , 1993 k ' d k - cu Matte White rnetal(Cu2S) ... International Conference, Vol IV Pyrometallurgy of Copper, ed Chen, W.J., Diaz, C., Luraschi, A,, and Mackey, P.J., The Metallurgical Society of CIM, Montreal, 117 132 Mounsey, E.N., Li, H., and...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 7 docx
... matte with slag Metallurgical coke or coal may also be added to the smelting furnace to reduce Fe,04(s) to FeO(e) 11.4 Decreasing Copper in Slag 111: F'yrometallurgical Slag SettlingiReduction ... Metallurgical Society of CIM, Montreal, Canada, 532 545 Nagamori, M (1974) Metal loss to slag Part I: Sulfidic and oxidic dissolution of copper in fayalite slag from low-grade matte Metall Trans., ... In J.M Toguri Symposium: Fundamentals o Metallurgical Processing, ed Kaiura, G., Pickles, C., Utigard, T and Vahed, A., The Metallurgical Society of CIM, Montreal, Canada, 48 496 Subramanian, K...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 9 doc
... is neutralized and either stored or treated for metal recovery (Terayama et al. , 1981; Inami et a1.,1990; Trickett 1991, Newman et al. , 1999) Fig 14.3 shows the Toyo smelter’s flowsheet for ‘blowdown’ ... 1981; Inami et al. , 1990; Shibata and Oda, 1990; Tomita et al 1990) Basic aluminum sulfate solution is also used (Oshima et al. , 1997) The following sections describe the principal sulfuric acid ... catalyst beds are passed through boiler feed water economizers and steam superheaters Several metallurgical plants also capture SO2 -+ SO3 conversion and SO3 absorption heat (Puricelli et al. ,...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 10 potx
... (Davenport et al. , 1999) The usual practice is to sense the mass of metal poured from a tiltable ladle, using load cells in the ladle supports as sensors Anode mass is normally 350-400 kg (Davenport et ... in the original copper are removed to slag (Bassa et al. , 1987) The Glogow I and Glogow I1 smelters use a similar technique (Czernecki et al. , 1998) 15 7.2 Lead removal (Newman et al. , 1991) The ... et al. , 1994) 0.002 - 0.005 After oxidation After reduction 0.002 - 0.005 ('poling') Cast anodes 0.002 - 0.005 (Davenport et al. , 1999) mass% 0.1 - 0.8 (Lehner et al. , 1994) 0.6 - (Reygadas et...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 11 doc
... final product is electrowon cathode copper equal in purity to electrorefined copper In 2002, about 2.5 million tonnes per year o f metallic coppcr are being produced hydrometallurgically - almost ... sheets (Hoey et al. , 1987, Shibata, et al. , 1987) Anode scrap melting energy is minimized by minimizing scrap production, Le by casting thick, equal mass anodes and by equalizing current between ... International Conference, Vol III Electrorefining and Hydrometallurgy of Copper, ed Cooper, W.C., Dreisinger, D.B., Dutrizac, J.E., IIein, H and Ugarte, G., Metallurgical Society of CIM, Montreal, Canada,...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 12 pdf
... The copper complex is formed from two oxime molecules, Eqn 18.1 Alodoximes: R = C9HtY C,ZH2S, = H Ketoxime: R or A = CyH19, A = CH3 (Dalton et al. , 1986; Kordosky et al 1999) Solvent Extraction ... Extractive Metallurgy of Copper This is also the overall rate at which metallic copper will have to be plated in the electrowinning plant It allows the electrowinning designer to calculate the ... vacuum pumping or by emptying the settler and pumping the crud from the settler floor (Jenkins et al. , 1999) It is separated from its host organic (Jenkins et al. , 1999) by: (a) centrifuging or...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 13 pps
... transmission, Metal recovery engine, transmission, axles, radiator I Partrecoverv tire, battery, catalytic converter J( refuse Magnetic fraction metal metal scrap cial steel copper, zinc I Market I I ... metallic copper Major metallic impurities are lead and tin (from bronze scrap, solder and decopperizing dross), zinc (from scrap brass), iror; Chemical Metallurgy o Copper Recycling f 357 (from ... and removal of associated metals in the f secondary metallurgy of copper In Third Int Symp Recycling o Metals and Engineered Materials, ed Queneau, P.B and Peterson, R.D., TMS, Warrendale, PA,...
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Extractive Metallurgy of Copper 4th ed. - W. Davenport_ et. al. (2002) WW Part 14 pptx
... low-turbulence metal feed into the mold cavity, to reduce defects in the solidified cast bar Lastly, all require steady metal levels in the pour pot and mold Control of mold metal level is done automatically, ... 22.4 Metal level in the mold cavity is measured electromagnetically (Hazelett) or with a television camera (Southwire) It is controlled with a stainless-steel metering pin in the pour pot Metal ... The f Metallurgical Society of CIM, Montreal, Canada, 133 146 Joseph, G (1999) Copper: Its Trade, Manufacture, Use and Environmental Status, ed Kundig, K.J.A.,ASM International, Materials Park,...
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Extractive Metallurgy of Copper 4th ed. W. Davenport et. al. (2002) Episode 11 potx
... pyrometallurgical and hydrometallurgical copper extraction is sulfuric acid production and use Hydrometallurgical copper extraction requires sulfuric acid (Chapter 17) - pyrometallurgical copper ... tapholes Electrical details furnace power rating, kW usual applied power, kW usual current, A usual voltage between electrodes, V number of electrodes diameter, m material normal immersion in ... The f Metallurgical Society of CIM, Montreal, Canada, 133 146 Joseph, G (1999) Copper: Its Trade, Manufacture, Use and Environmental Status, ed Kundig, K.J.A.,ASM International, Materials Park,...
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Extractive Metallurgy of Copper 4th ed. W. Davenport et. al. (2002) Episode 12 docx
... 290 hydrometallurgy 3, 290 ideal smelting 188 leaching 3, 290 materials cycle 343 Mitsubishi smeltingkonverting 200 scrap additions to 362 scrap (materials) cycle 343 424 lndex pyrometallurgy scrap ... copper 369,374 Hydrometallurgical extraction of Cu 289,307,327 chalcopyrite 293 concentrates 302 chemistry 291 chalcocite 29 I , 292 'oxide' minerals 290,291 sulfide minerals 293 concentrate leaching ... grinding, flotation) (see also Concentration of Cu ores) orc 31 flowsheets 32, 47 slag 181 Minerals of copper 19 compositions (stoichiometry) 401 general 19 hydrometallurgy 29 Mining copper ores...
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Extractive Metallurgy of Copper 4th ed. W. Davenport et. al. (2002) Episode 1 docx
... Fig 1.2 Hydrometallurgical heap leach copper extraction flowsheet for 'oxide' and chalcocite ores 4 Extractive Metallurgy o Copper f (a) isolating an ore's Cu-Fe-S (and Cu-S) mineral particles ... or promotional purposes, resale, and all forms of document delivery Special rates are available for educational institutions that wish to make photocopies for non-profit educational classroom ... Fourth edition 1916 1980 1994 2002 British Library Cataloguing in Publication Data Davenport, W G (William George) Extractive metallurgy of copper 4th ed 1.Copper - Metallurgy 1.Title II.King, M...
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Extractive Metallurgy of Copper 4th ed. W. Davenport et. al. (2002) Episode 2 pdf
... minerals are treated by the Fig 1.1 flowsheet, i.e pyrometallurgically.Carbonates, chlorides, oxides, silicates and sulfates are treated by the Fig 1.2 flowsheet, i.e hydrometallurgically Chalcocite ... International Conference, Vol II, Mineral Processing/Environment, Health and Safety, TMS, Warrendale, PA Herbst, J A (2000) Control 2000, Mineral and Metallurgical Processing, SME, Littleton, CO ... xemoving 'rock' from the final concentrate (Toro et al. , 1993) 50 Extractive Metallurgy of Copper - Downcomer feed pump Recycle Air from atmosphere ' Cell level control via dart valve Final tailing...
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