Sulfating Roasting
Comprehensive Study on the Mechanism of Sulfating …
Based on the results of time-resolved XRD analysis and synchronous thermal analysis (STA), a mechanism of the sulfation roasting was elucidated. The rate-controlling step of zinc and copper sulfation process during the ZPR roasting was estimated. The sulfating …
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Recovering indium with sulfating roasting from copper-smelting …
Indium in the ash was first enriched to the leaching-slag in leaching process, and then recovered by sulfating roasting. The method included mixing the leaching-slag with sulfuric acid, making them into particles, roasting the mixture, and then leaching the calcine with hot water. Above 90% of indium in calcine could be dissolved into the ...
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Comprehensive Study on the Mechanism of Sulfating …
The sulfating roasting at 600 °C during 180 min with the optimal Fe2(SO4)3∙9H2O addition followed by water leaching enables to recover 99% Zn and 80.3% Cu, while Fe, Pb, …
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SULFATE ROASTING COPPER-COBALT SULFIDE …
A partial sulfating roast Strictly speaking, a sulfating roast should result in the combination of the sulfate radical, SOt, with every possible metallic group present. Actually, the reaction desired for copper-cobalt concentrates could more accurately be termed a partial sulfating roast, since the temperature is adjusted above the
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Selective Extraction of Lithium from Spent Lithium-Ion …
impurities remain as insoluble compounds [7,8]. One of the benefits of utilizing sulfating roasting is that sulfates have high solubility in water, making the process convenient and eliminating the need for acid [9]. Sulfating roasting has been studied by some authors using different methods for recycling spent lithium batteries.
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Comprehensive recycling of zinc and iron from smelting …
XRD patterns of SWCZF (a), phase transformation products (b). (roasting at 600 °C for 30 min with SO 2 /SO 2 +O 2 of 60% (v/v)). The quantitative analysis results of phase transformation from SWCZF reaction with SO 2 are shown in Fig. 4. It can be seen that content of zinc ferrite and zinc sulfate in SWCZF are 60.96% and 23.90%, respectively.
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Sulfating roasting of manganese nodules and selective …
A study of extraction of metals from deep-sea manganese nodules was made by the sulfating roasting with SO2 gas in a temperature range from 100 to 1, 000°C followed by the water leaching. The effects of roasting conditions on the extraction percentages of Ni, Co, Cu, Mn and Fe by the water leaching were investigated. The selective extraction of Ni, Co and Cu from the …
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Comprehensive Study on the Mechanism of …
The sulfating roasting at 600 °C during 180 min with the optimal Fe2(SO4)3∙9H2O addition followed by water leaching enables to recover 99% Zn and 80.3% Cu, while Fe, Pb, Ag, In, Ga retained ...
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Copper Cobalt Sulfating Roasting
Sulfating roasting is generally used for processing copperconcentrates in combination with electrowinning. The copper sulfide is transformed into water-soluble copper sulfate and the iron sulfide into insoluble iron oxide. Standard …
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Roasting (metallurgy)
Roasting is a process of heating a sulfide ore to a high temperature in the presence of air. It is a step in the processing of certain ores.More specifically, roasting is often a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified, e.g. by froth ...
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Conversion Mechanisms of Selective Extraction of …
With the undergoing unprecedented development of lithium-ion batteries (LIBs), the recycling of end-of-life batteries has become an urgent task considering the demand for critical materials, environmental pollution, and ecological impacts. …
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Selective Recovery of Scandium From Sulfating …
The leachate obtained from sulfation-roasted Bayer red mud is suitable for extraction of scandium by liquid–liquid solvent extraction because it contains trace amounts of Fe³⁺ and Si⁴⁺.
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Sulphating roasting of copper-cobalt concentrates
Ground run-of-mine ore (P80 < 75 μm) was mixed with concentrated H2SO4 (sulfating agent) and Na2SO4 (dual catalyst and sulfating agent) to intensify atmospheric sulfation roast reaction in an ...
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Sulfating roasting of manganese nodules and selsective …
The sulfating roasting was carried out with SO{sub 2} gas in a temperature range from 100 to 1000 centigrade followed by the water leaching of the roasted ore. The effects of roasting conditions on the extraction percentages of Ni, Co, Cu, Mn, and Fe by the water leaching were investigated. The selective extraction of Ni, Co, and Cu from the ...
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Calcination And Roasting
Roasting: Calcination is a process in which ore is heated in the absence of air or air might be supplied in a limited quantity: Roasting involves the heating of ore lower than its melting point in the presence of air or oxygen. Calcination involves the thermal decomposition of carbonate ores. Roasting is carried out mostly for sulfide minerals.
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Selective Recovery of Scandium From Sulfating Roasting …
The leaching results indicate that roasting temperature and roasting time are the main constraint on selective leaching performance of scandium. As the sulfated red mud sample is roasted at 750 °C for 40 min and subjected to water leaching at 50 °C for 30 min, 53.0 wt% Sc 3+, <1.0 wt% Fe 3+, <0.3 wt% Si 4+ and ~8.9 wt% Al 3+ could be ...
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Recycling of Zinc and Iron from Smelting Waste Containing …
It is critical to recycle valuable elements such as zinc and iron from smelting waste containing zinc ferrite because of the resource crisis and environmental sustainability. Sulfating roasting followed by water leaching has been considered a promising approach. In this study, a novel sulfating roasting method using SO_2 has been developed to treat zinc ferrite for the …
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Extraction of Copper from Copper-Bearing …
The roasting behaviors for chalcopyrite, copper slag, and pure copper compounds were investigated in a 0.5% SO2–0.5% O2–99% Ar atmosphere at 600°C. X-ray fluorescence spectroscopy, x-ray ...
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Conversion Mechanisms of Selective Extraction of Lithium …
Sulfating roasting tests were conducted with different agents to investigate lithium recovery from spent lithium-ion manganese oxide (LMO) batteries. In this study, CaSO4 and CaCO3 were used as ...
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Sodium sulfate activation mechanism on co-sulfating roasting …
@article{Cui2018SodiumSA, title={Sodium sulfate activation mechanism on co-sulfating roasting to nickel-copper sulfide concentrate in metal extractions, microtopography and kinetics}, author={Fuhui Cui and Wenning Mu and Shuai Wang and Hai-xia Xin and Qian Xu and Yuchun Zhai and Shao‐hua Luo}, journal={Minerals Engineering}, year={2018}, url ...
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Sulfatizing Roasting and Leaching of Cobalt Ores at …
The Outokumpu Oy Cobalt Plant processes nickel, copper, and zinc bearing cobaltiferrous pyrite concentrate. Main operations: sulfatizing roasting, leaching, solution purification and recovery of cobalt metal. Roasting is done in fluidized beds, most of the material being fed as calcine. Green concentrate is used only for the heat requirements, and for …
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Activated sulfating roasting of the chalcopyrite concentrate …
The sulfating roasting of the chalcopyrite concentrate with various pyrite contents is investigated in activated conditions in order to obtain the preferentially sulfate cinder most suitable for leaching and for the effective recovery of copper and accompanying iron. The activating effect that the trivalent iron sulfate which forms as a result of the low-temperature …
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Effect of sulfation roasting on metal extraction from cinkur zinc leach
The sulfating roasting at 600 °C during 180 min with the optimal Fe2(SO4)3∙9H2O addition followed by water leaching enables to recover 99% Zn and 80.3% Cu, while Fe, Pb, Ag, In, Ga retained ...
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Recycling of Zinc and Iron from Smelting Waste …
sustainability. Sulfating roasting followed by water leaching has been con-sidered a promising approach. In this study, a novel sulfating roasting method using SO 2 has been developed to treat zinc ferrite for the efficient separation of zinc and iron. Moreover, the conversion mechanism of zinc ferrite and SO 2 was investigated in detail.
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(PDF) Selective Extraction of Lithium from Spent Lithium
Sulfating roasting tests were conducted with different agents to investigate lithium recovery from spent lithium-ion manganese oxide (LMO) batteries. In this study, CaSO4 and CaCO3 were used as ...
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Selective Sulfation Roasting for Cobalt and …
The extraction of cobalt from secondary resources has become crucial, as cobalt has been identified as a strategically important and critical raw material due to the high risks of supply chain disruptions. In this work, …
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Selenium Metallurgy
Selenium smelting is mainly carried out by sulfating roasting processes, with high recovery of selenium and excellent adaptability to various raw materials. The technological process is illustrated as follows (Fig. 1): The anode sludges are dehydrated first and mixed with concentrated sulfuric acid; then sulfating roasting is implemented in the ...
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Recovering indium with sulfating roasting from copper …
Semantic Scholar extracted view of "Recovering indium with sulfating roasting from copper-smelting ash" by G. Zhu et al.
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Extraction of Copper from Copper-Bearing Materials by Sulfation
The roasting behaviors for chalcopyrite, copper slag, and pure copper compounds were investigated in a 0.5% SO2–0.5% O2–99% Ar atmosphere at 600°C. X-ray fluorescence spectroscopy, x-ray ...
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Activated Sulfating Roasting of the Chalcopyrite …
Abstract—The sulfating roasting of the chalcopyrite concentrate with various pyrite contents is investigated in activated conditions in order to obtain the preferentially sulfate cinder most suitable for leaching and for the effective recovery of copper and accompanying iron. The activating effect that the trivalent iron sulfate
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