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 ...

@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 ...

All reagents for sulfating roasting except K 2 SO 4 and the feasible carbonizing process showed a major variation of spontaneity with temperature while reagents for other processes did not. Sulfation and chlorination using Na 2 SO 4, SO 3 and Cl 2 as well as the spontaneous carbonizing process benefit from feasibility only at low temperatures ...

A new bauxite-type vanadium ore with a grade of 0.96% V2O5 was found in Hanzhong, China, having quartz, illite, and calcite as the main mineral constituents and vanadium that mainly occurs in the aluminosilicate …

The fundamental principle of sulfating roasting is to selectively convert the desired metal into a sulfate that can dissolve in water. This is accomplished by incorporating various sulfate compounds during the roasting …

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 …

Sulfate roasting is one of the important techniques that can be taken to recover copper from its sulfides. The purpose of the sulfate roasting process is to produce water-soluble copper …

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 ...

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 ...

The sulfating roasting under optimal conditions, which are the roasting temperature of 600 C, roasting duration of 180 min, the addition of 48% Fe2 (SO4 )3 ·9H2 O to ZPR, and subsequent water leaching led to recovery of 99% Zn and 80.3% Cu, while Fe, Pb, Ag, In, Ga retained almost fully in the residue. Thus, the approach based on the ...

In this study, a novel sulfating roasting method using SO2 has been developed to treat zinc ferrite for the efficient separation of zinc and iron.

Copper cobalt sulfating roasting technology gives excellent metals recovery, and can be integrated into existing sulfuric acid plant. Zinc Roasting `s Zinc roasting solutions will allow getting efficient heat recovery, sulfuric acid …

Dechlorination and defluorination from zinc oxide dust by microwave sulfating roasting was investigated in this study. According to proposed reactions in the process, detailed experiments were systematically conducted to study the effect of roasting temperature, holding time, air and steam flow rates on the efficiency of the removal of F and Cl. The results show …

ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Sulfides are not reduced with the most widely used redu-

Under the optimal conditions, the extraction of Ni, Cu, and Co are 98.6 pct, 93.4 pct, and 90.4 pct, respectively, and the iron removal rate reaches 44 pct Cui et al. developed two-stage co-sulfating roasting process to extract valuable metals from nickel-copper sulfide concentrate, the results of kinetics showed that Na 2 SO 4 can reduce the ...

In the oxidation roasting stage, the iron species in the nickel concentrate was preferentially oxidized to form iron oxides, leaving non-ferrous metals (Ni, Cu, Co) as sulfides. The roasted ...

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 almost fully in the residue. Zinc plant residue (ZPR) is a secondary material generated during hydrometallurgical zinc production that contains considerable contents of …

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

The formation of sulfate can be described by the reactions of oxide in SO2-O2 gas mixtures or SO3 gas atmosphere, as shown in Eqs. 1, 2, and 3. Therefore, the stability of the sulfates of interest was calculated by HSC and is shown in Fig. 2 as the predominance area diagram of the Li-Co-O-S …

The remaining copper should be comprehensively recovered in the process of leaching slag by sulfating roasting. Separation of copper and indium can be achieved by N902 extraction to recover copper, and by substitution or precipitation to enrich indium. The total recovery of copper is the sum of Cu leached by acid and that by sulfating roasting.

· Metal recovery · Sulfating roasting · Water leaching Introduction As a clean and environmentally friendly secondary battery, lithium-ion batteries (LIBs) have advantages of high energy density, long cycle life, high working voltage, and low self-discharge rate. They have been applied to …

Sulfating Roasting Red Mud By Water Leaching Zhaobo Liu, Hongxu Li and Zihan Zhao Abstract A completely new process of selectively recovering Sc3+ without impurity of Fe3+ from Bayer red mud was ...

Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate was roasted with the addition of …

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 ...

Bottom ash (BA) is mainly composed of compounds of Al, Fe, Ca, and traces of rare earth elements (REEs). In this study, the selective recovery of erbium (Er) as REEs by means of sulfation–roasting–leaching–precipitation (SRLP) using BA was investigated. A pre-treatment process of sulfation and roasting of BA was developed to selectively recover REEs …

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 SO2 has been developed to treat zinc ferrite for the …

A promising approach for recycling ZPR is the sulfating roasting using iron sulfates followed by water leaching. In this study, the composition of ZPR and the obtained products …

Ammonium sulfate roasting-water leaching is a promising and clean method due to the elimination of SO 2, low cost, high metal extraction and high selectivity for complex nickel …

Copper cobalt sulfating roasting technology gives excellent metals recovery, and can be integrated into existing sulfuric acid plant. `s Zinc roasting solutions will allow getting efficient heat recovery, sulfuric acid production and excellent …

Roasting at 700 °C with an oxygen content of 4 vol.% results in the lowest residual arsenic content in the concentrate, from 11.8 to 0.34 wt.%. In the pilot experiment, the oxygen content was indirectly controlled by controlling the feed rate. The residual arsenic content is reduced to 0.48 wt.% and the purity of the recovered As2O3 reaches ...