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An Overview of Iron Precipitation in Hydrometallurgy

The jarosite process is firmly established in the zinc industry, and the technique also has been used for iron control in cobalt processing (Aird, Celmer and May, 1980; Harris, Monette and Stanley, 1982), in the leaching of platinum-rich nickel-copper mattes (Plasket and Dunn, 1986), in the processing of maganese ores (Teixeira and Tavares ...

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Direct Leaching Alternatives for Zinc …

The industrial implementations of the Sherritt zinc concentrate pressure leach process are listed . ... Iron Control Technologies, ... Lead and Zinc Processing, COM 2010, Vancouver, Canada, 2010.

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Starting Up the Sherritt Zinc Pressure Leach Process at …

Flon, Manitoba (Canada), since 1930. The original zinc refinery was based on a roast-Ieach-electrowinning process for ... of iron rejection, the pressure leach step Return Acid Wash Liquor Zinc Concentrate Sulphur Sulphide Cake ... The flow sheet for the two-stage zinc pressure leach process at Hudson Bay. 1994 April • JOM 51 . cally simple ...

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Control of Iron in the Hudson Bay Zinc Pressure Leach Plant

The first commercial application of the Dynatec two-stage zinc pressure leach process commenced operation at the metallurgical complex of Hudson Bay Mining and Smelting Co., Limited in Flin Flon, Manitoba in 1993. A key feature of the successful leaching operation is the presence of iron in solution, which facilitates oxygen transfer in the autoclaves and enables …

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Iron Control in Hydrometallurgy

leaching of coppe r or zinc sulphides proceeds via a two-step process: the oxidation of the sulphide, leaching of the metal with the production of ferrous sulphate, followed by the …

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Research on Behavior of Iron in the Zinc Sulfide Pressure Leaching Process

Agitation leaching is a promising technology in hydrometallurgy for treating copper–cobalt oxide ores. In this work, the behavior of oxide ores containing around 2.3% Cu and 0.3% Co received ...

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Integration of Sherritt Zinc Pressure Leach Process at Ruhr …

The third commercial application of the Sherritt Zinc Pressure Leach Process commenced operation at the Ruhr-Zink refinery in March 1991. ... Hematite — the solution to a disposal problem — an example from the zinc industry, in Iron Control in Hydrometallurgy, ed. J.E. Dutrizac and A ... Sherritt, Inc., Fort Saskatchewan, Canada. M. J ...

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Mathematical modeling of the zinc pressure leach …

the shrinking core modeF 9,1~ with surface reaction control- ling. For most sulfide minerals, the rate of shrinkage (in ... are oxidized by the ferric ion (Fe3+). Thus, in the zinc pressure leaching process, the rate of fer- rous to ferric oxidation and the ratio of ferrous to ferric ... that in the zinc pressure leach, iron is removed from ...

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Iron control in zinc pressure leach processes | JOM

The integration of Dynatec's zinc pressure leach process with existing roast-leach-electrowin plants employing various methods of iron rejection is briefly described in this article, along with …

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Selective nickel-iron separation from atmospheric leach …

BUBAN K.R., COLLINS M.J. and MASTERS I.M., 1999, Iron control in zinc pressure leach processes, J. Met., 51 (12), 23–25. ... Iron Control and Disposal. The Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Canada, pp. 135–146. VAZARLIS H. and NEOU-SYNGGOYNA P., 1984, A study of the leaching of Cu and Zn from Greek copper ...

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(PDF) Recovery of zinc from leach residues with minimum iron

Hydrometallurgy 40: 37–49. Buban KR, Collins MJ, and Masters IM (1999) Iron control in zinc pressure leach processes. Journal of Metallurgy 51: 23–25. Downloaded from wmr.sagepub at UNIV OF SOUTH FLORIDA on October 27, 2011 Alizadeh et al. 171 Dutrizac JE, Monhemius AJ (1986) Iron Control in Hydrometallurgy.

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Zinc and Iron Control Overview Iron Control in Zinc …

Dynatec's zinc pressure leach process with existing roast-leach-electrowin plants em-ploying various methods of iron rejection is briefly described in this article, along with the application of two-stage pressure leach-ing in stand-alone processes. INTRODUCTION Conventional zinc concentrates typi-cally contain 5–10 percent iron. The iron ...

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Zinc pressure leaching at HBMS

2. Process chemistry In the zinc pressure leach process, zinc concentrate is acid leached in an autoclave at 145 to 150 and in an oxygen enriched atmosphere with a total pressure of 1100 kPa gauge. The concentrate is oxidized by ferric iron generated in the leach to produce a zinc sulphate solution and elemental sulphur.

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Starting up the Sherritt Zinc Pressure Leach Process at …

The first commercial application of the Sherritt two-stage zinc pressure leach process commenced operation at the Hudson Bay Mining and Smelting Company metallurgical complex in Flin Flon, Manitoba (Canada), on July 2, 1993. The start-up was relatively smooth, and full design rate for the plant was achieved by September 12, 1993. Since that time, zinc …

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Influence of Low Iron Inputs on Impurity Co-Precipitation in …

In the zinc plant, zinc concentrates are roasted to produce calcine, which is then processed in the leaching circuit for zinc recovery. Calcine is first dissolved at pH <2.0. This is …

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Iron Control In Pressure Hydrometallurgy

The Goethite Process (70-90°C), Jarosite Process (90-100°C) and Hematite Process (T>185°C) produce solids that have high iron content and can be easily extracted from the hydrometallurgical ...

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Iron control in zinc pressure leach processes | ScienceGate

Formation of Massive Gunningite-Jarosite Scale in an Industrial Zinc Pressure Leach Autoclave: A Characterization Study Canadian Metallurgical Quarterly 10.1179/cmq.2009.48.2.99

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Sherritt Information ZincTechnology V1Final

plant and conventional leach plant are not required. Operating costs are similar. The outstanding advantage of Sherritt's process is that it eliminates the primary environmental concern of the zinc industry. Zinc Technology Sherritt's Zinc Pressure Leach Process involves the direct leaching of zinc sulphide concentrates in

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Commercial Applications of the Sherritt Zinc Pressure Leach Process …

Four iron precipitation processes have been commercialized: the jarosite process; the goethite process; the paragoethite process; and the hematite process. The paper describes the commercial applications of the Sherritt Zinc Pressure Leach Process and its integration with the commercially applied iron precipitation processes.

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The Behavior of Zinc and Iron in Neutralized Residue During …

In two-stage zinc pressure leaching process, zinc calcine is used to neutralize the acid pressure leaching solution. The residue usually contains a certain amount of zinc, iron, …

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A comprehensive review of processing strategies for iron precipitation

The jarosite process was developed in the 1960s and is nowadays the most important way for the removal of iron from zinc leach liquor. Jarosite is a basic iron sulphate with the general formula XFe 3 (SO 4) 2 (OH) 6 whereby X can be represented by monovalent cations such as K +, NH 4 +, Na +, Ag +, H 3 O + or 1/2 Pb + (Bayliss et al., 2010).Jarosite …

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Iron control in zinc pressure leach processes | ScienceGate

The oxidation of ferrous sulphate by molecular oxygen under zinc pressure-leach conditions

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Research on Behavior of Iron in the Zinc Sulfide …

Research on Behavior of Iron in the Zinc Sulfide Pressure Leaching Process Shu-Chen Qin 1, Kai-Xi Jiang 1,2,*, Hai-Bei Wang 1, Bang-Sheng Zhang 1, Yu-Fang Wang 1 and ... This study enables the effective control and utilization of iron with certain technical basis. 2. Materials and Methods 2.1. Materials and Reagents

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The Analysis of Fe Behavior in Zinc Pressure Leaching

Zinc sulfide concentrate mainly contains zinc and iron, of which the iron content is about 5–15%. During Zn hydrometallurgy, the iron in the concentrate is one of the key concerns in the selection of Zn metallurgical process as it will determine the length of the process, and will directly affect the zinc leaching rate and the comprehensive recovery methods and effect of the …

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Research on Behavior of Iron in the Zinc Sulfide Pressure Leaching Process

Dissolved iron exerts significant effects on mineral leaching, impurity removal, and solution purification in the zinc hydrometallurgy process. To date, iron oxidation and migration behaviors are yet to be fully understood and further research on effective regulation mechanisms of iron is required. In this paper, zinc sulfide concentrate was used as the research object. The …

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Iron control in zinc pressure leach processes

In hydrometallurgical zinc processes, the coprecipitation of minor impurities along with iron precipitation is also important in producing zinc-sulfate solution from which high-purity zinc cathode can be electrowon. The integration of Dynatec's zinc pressure leach process with existing roast-leach-electrowin plants employing various methods ...

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Iron Control in Hydrometallurgy

processes have been developed to leach zinc directly from the sphalerite; i.e., to oxidize and leach the sphalerite in the same reactor. Two direct leaching processes have reached commercial application, as indicated in Table 2. In both the pressure leaching and

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Iron recovery from sulphate leach liquors in zinc hydrometallurgy

Iron is usually present in leach solutions and its elimination is a major operational problem in zinc hydrometallurgy.The recovery of iron from such solutions is usually carried out by precipitation as jarosite, goethite or hematite.These residues, contaminated with heavy metals ions such as Zn, Pb, In, Ga, Ge, Co and sulphur, are environmentally unacceptable and their …

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A Fuzzy Control Method Based on Rule Extraction for …

In the neutral leaching process of zinc hydrometallurgy, the pH value directly aects the leaching rate of zinc calcine. How - ever, due to the complex mechanism of the leaching process and the frequent uctuation of working conditions, it is dicult to control the pH value by manual control.

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Zinc Pressure Leaching Technology at Minerals, …

Sherritt provided the zinc pressure leach process technology and know how for the Minerals ... and iron residue. In 1993, this application of the Sherritt Zinc Pressure Leach ... Canada T8L 4K7 T +780 992 8000 E info@sherritt . Title: Microsoft Word - 2020 Case Study -Zinc Pressure Leaching at Flin Flon Manitoba KL Feb 27 ...