Salt roasting of an off-grade copper concentrate

Ngọc, Nguyễn Văn; Shamsuddin, M.; Prasad, P. M.

doi:10.1016/0304-386x(89)90008-x

Cited by 19 publications

(9 citation statements)

References 3 publications

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“…(Ngoc et al, 1989;Prasad and Pardey, 1998;Chakravortty and Srikanth, 2000). 일반적으로 황화광물에 NaCl, KCl, MgCl 2 , NH 4 Cl 등과 같은 소금(salt)을 첨가하 여 소성시키면 수용성의 염화물 금속들이 형성된다.…”

Section: 광액농도 효과unclassified

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Mineralogical Phase Transform of Salt-roasted Concentrate and Enhancement of Gold Leaching by Chlorine-hypochlorite Solution

Kim¹,

Cho²,

Oh³

et al. 2013

Journal of the Mineralogical Society of Korea

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: In order to optimize the gold leaching process from refractory sulfide concentrate, a chlorine-hypochlorite solution with varying concentrations and temperatures were applied to salt-roasted concentrate. The concentrate consisted of pyrite, chalcopyrite, and galena, which were turned into hematite through air-roasting at 750℃. Also these concentrates were changed into hematite and nantokite (CuCl)) through salt (NaCl)-roasting at 750℃. The results of the gold leaching experiments showed that the best gold leaching parameters were obtained when the hydrochloric acid-sodium hypochlorite mix was at a ratio of 1 : 2, the added concentration was 1.0 M concentration, the pulp density was 1.0%, and the leaching was done at a 60℃ leaching temperature. The leaching rate for gold was much greater in the roasted concentrate than in the raw concentrate. The leaching rate was greater in the salt-roasted concentrate than in the plain roasted concentrate too. From XRD analysis, quartz was found in the saltroasted concentrate and in the solid residue from the chlorine-hypochlorite leaching solution at 60℃.

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Section: 광액농도 효과unclassified

“…(Chakravortty and Srikanth, 2000). (Ngoc et al, 1989;Prasad et al, 1996;Kanari et al, 1999;Cocic et al, 2007). …”

Section: 광액농도 효과mentioning

confidence: 99%

Mineralogical Phase Transform of Salt-roasted Concentrate and Enhancement of Gold Leaching by Chlorine-hypochlorite Solution

Kim¹,

Cho²,

Oh³

et al. 2013

Journal of the Mineralogical Society of Korea

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“…69 Ngoc and coworkers described a salt roast/water leach procedure that gave excellent copper and zinc recoveries from a copper concentrate containing appreciable sphalerite. 70 Cho reported an acidic, aqueous chlorine treatment that oxidizes 90% of the pyrite and 40% of the organic sulfur in coal at room temperature.…”

Section: Leaching Of Ores and Concentratesmentioning

confidence: 99%

The aqueous processing of minerals and materials

Doyle

1990

JOM

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“…The main advantages of this sulfide concentrate processing version are: a reduction in energy consumption due to roasting at comparatively low temperature; formation of extracted metal water soluble compounds, which simplifies cinder leaching, and reduced sulfuric acid consumption. For example, during roasting molybdenum concentrate with sodium chloride molybdenum in the cinder is partly represented by water soluble sodium molybdate [1,2], and during roasting copper and complex sulfide concentrates metal sulfides are entirely transformed into chlorides [3][4][5].Previously [6], the possibility has been demonstrated of leaching nickel from cinder of roasting nickel sulfide concentrate with sodium chloride up to 85% by water and up to 96% by sulfuric acid. The aim of this work is to optimize roasting and leaching regimes in order that the maximum amount of nickel and copper are extracted in the water leaching stage, leaving iron in the sinter.…”

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confidence: 98%

mentioning

confidence: 99%

Nickel Sulfide Concentrate Processing Using Low-Temperature Roasting with Sodium Chloride

et al. 2014

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A method is proposed for processing nickel sulfide concentrates based on low-temperature roasting with sodium chloride. In the course of research, the dependence of valuable component extraction on excess sodium chloride and roasting temperature and duration is determined, and also cinder water and sulphuric acid leaching regimes are optimized. Optimum results are achieved with the following roasting regimes: temperature 400°C, duration 1.5 h, and excess NaCl 50-200% of concentrate weight. A production scheme is proven on a laboratory scale with subsequent two-stage water and sulphuric acid leaching with calculation of the material balance for nickel, copper, cobalt, and iron. Complete extraction into solution is, %: Ni 95, Cu 99, Co 96.A promising version of sulfide nickel concentrate processing may be low-temperature roasting (up to 400-450°C) with sodium chloride followed by two-stage cinder leaching. The main advantages of this sulfide concentrate processing version are: a reduction in energy consumption due to roasting at comparatively low temperature; formation of extracted metal water soluble compounds, which simplifies cinder leaching, and reduced sulfuric acid consumption. For example, during roasting molybdenum concentrate with sodium chloride molybdenum in the cinder is partly represented by water soluble sodium molybdate [1,2], and during roasting copper and complex sulfide concentrates metal sulfides are entirely transformed into chlorides [3][4][5].Previously [6], the possibility has been demonstrated of leaching nickel from cinder of roasting nickel sulfide concentrate with sodium chloride up to 85% by water and up to 96% by sulfuric acid. The aim of this work is to optimize roasting and leaching regimes in order that the maximum amount of nickel and copper are extracted in the water leaching stage, leaving iron in the sinter.Chemical processes accompanying roasting are quite complicated. In general form, sulfide reaction with sodium chloride in the presence of oxygen occurs by the reaction MeS + 2NaCl + 2O 2 = MeCl 2

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Salt roasting of an off-grade copper concentrate

Cited by 19 publications

References 3 publications

Mineralogical Phase Transform of Salt-roasted Concentrate and Enhancement of Gold Leaching by Chlorine-hypochlorite Solution

Mineralogical Phase Transform of Salt-roasted Concentrate and Enhancement of Gold Leaching by Chlorine-hypochlorite Solution

The aqueous processing of minerals and materials

Nickel Sulfide Concentrate Processing Using Low-Temperature Roasting with Sodium Chloride

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