Fayalite Beneficiation

Characterization of copper slag for beneficiation of iron …

Analysis from the results showed that nickel, iron and copper existed in high amounts in the slag with these elements found in the fayalite and chromite phases. Three mineral phases were detected namely; fayalite, chromite and sulphide. XRD analysis established that the sample contains >80% amorphous (non-crystalline material) material.

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Studies on Characterization and Beneficiation of Banded

The result from beneficiation showed that the iron value could be enhanced to 63.9% with a yield of approximately 29.4% while decreasing the silica value to 8.2%. ... (wt%) charcoal at 900 W power. Fayalite, wustite and ferrite phases were also formed at ≥ 7 (wt%) charcoal. Austenite and martensitic phases were observed in optical micrograph ...

Crystallization and Beneficiation of Magnetite for Iron

The iron resources in nickel slag were recycled by oxidation and magnetic separation. The effects of holding time, temperature, air flow rate and basicity on the crystallization of magnetite were investigated systematically. Moreover, the influence of particle size and magnetic flux density on the recovery and grade of iron during the magnetic …

Crystallization and Beneficiation of Magnetite for …

In this process, coke or coal is used to reduce fayalite (Fe 2 SiO 4) in nickel slag, while producing iron and silicates; CaO is also added to improve the reaction rate by destroying the structure of the silicates.

Carbothermic Microwave Processing for the Enrichment …

Abstract The current study investigates the beneficiation of iron ore fines by the carbothermal process using muffle and microwave furnace. The muffle furnace reduction was found useful for the separation of iron-bearing phases from the quartz impurities and concentrate with iron purity of ~ 64%, recovery of 98%, and a yield of 84.5% is achieved at 900 °C, 9% …

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Mineralogical Characterization of Copper Slag from …

It forms during the rapid cooling process in the production of copper. Compared with fayalite, the glassy substance contains a high content of SiO 2 and a low content of FeO. Both fayalite and the glassy substance are nonmagnetic and difficult to recover by beneficiation processes. Copper associated with sulfur presents as copper matte.

Mechanism of Mineral Phase Reconstruction for Improving …

All of this transforms the fayalite into magnetite and accelerates the growth of particles of both copper matte and magnetite, hence improving copper and iron separation. …

Carbothermic Reduction of Copper Slag in the Presence of …

According to the results of the mineralogical analysis, the primary phases in the copper slag were fayalite, and magnetite. The HSC Chemistry results on equilibrium phase …

Structural Changes in Copper Slags during Slow Cooling

Almost all of the iron is oxidized and present in the form of fayalite, magnetite, and magnetite, with other elements (silicon, copper, zinc, and aluminum) incorporated into its lattice. ... The possibility of improving the beneficiation performance of dump slags from Vanyukov furnaces and shaft furnaces using ultrafine grinding in bead mills ...

Effects of CaO Addition on the Iron Recycling from …

Thermodynamic analysis showed that CaO promotes the reaction between fayalite (Fe2SiO4) and O2. Phase diagrams of the FeO-SiO2-MgO-CaO slag with various CaO contents in an air atmosphere drawn by FactSage 7.1 …

Iskorišćenje oksida gvožđa iz fajalita pomoću vodene pare …

The results showed that fayalite was completely decomposed into magnetite (58.8 wt%), hematite (21.6 wt%) and silica (19.6 wt%) at 1000 °C for 40 min under water vapor condition. Compared with the result obtained in dry air, water vapor could promote fayalite to transform into magnetite by decreasing oxygen fugacity.

Mineralogical Characterization of Copper Slag from Tongling …

Iron exists in the form of fayalite, a glassy substance and magnetite, and copper presents as copper matte and metallic copper. Approximately 82% magnetite and 70% copper …

Recovery of Zinc and Copper from Lead Slag by the …

The valuable metals copper and zinc were successfully recovered from a water-quenched lead smelting slag containing zinc in Gansu Province. This study focuses on the application of the direct reduction roasting-flotation process for extracting these metals from the slag phase. To comprehend the recovery principle of copper and zinc minerals in the slag …

Strong binding of heavy metals in fayalite of copper …

DOI: 10.1016/j.scitotenv.2022.161351 Corpus ID: 255466360; Strong binding of heavy metals in fayalite of copper smelting slags: Lattice site substitution. @article{Li2023StrongBO, title={Strong binding of heavy metals in fayalite of copper smelting slags: Lattice site substitution.}, author={Fei Li and Sihai Zhang and Nengwu Zhu and Junyao Ke and Yun Zhao and Weiwen Ma and Ping …

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Utilization of Waste Copper Slag to Produce Directly …

Waste copper slag is a refractory material with high iron content, but it is difficult to recovery iron minerals from the slag because the iron mainly occurs in fayalite. A new technology of coal …

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Efficient recovery of iron and chromium from laterite residue …

As temperature lower than 1443 °C, the ∆G of forming fayalite is negative. The reduction temperature of fayalite is 764 °C. As temperature higher than 1000 °C, the reduction of chromite to Cr occurs and fayalite could be reduced to metallic iron. More important, the particle size of metallic iron grew to >100 μm from <10 μm as temperature.

Beneficiation of nickeliferous laterite by reduction roasting …

The smaller amount of SiO 2 content might not promote the fayalite formation. However, Li et al. [15] reported that the addition of sodium sulfate could suppress the formation of fayalite ...

Beneficiation studies of a difficult to treat iron ore using

Reduction roasting using conventional & microwave (MW) heating was attempted. Both routes yield iron concentrates with ~ 63–64% Fe at ~ 85% weight recovery. MW route is …

Carbothermal reduction of fayalite: thermodynamic and …

beneficiation, oxidation-magnetic separation and carbothermal reduction process. Han et al. [10] utilized the grinding and beneficiation method to explore the recovery of Fe from ... fayalite is ...

Characterization of copper slag for beneficiation of iron and …

It illustrates that the major crystal phases in the slag are chromite (Co, Fe) CrO 4) and fayalite (Mg, Fe) 2 SiO 4, as seen from the XRD pattern analysis (Figure 1), Scanning Electron Microscope (SEM) and EPMA (Spot analysis) images are shown in Figures 2 and 3 …

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Processing of Banded Hematite Quartzite Ore for Recovery …

This study investigates upgrading of low-grade banded hematite quartzite iron ore (Fe ~31%). Conventional beneficiation was found to be futile. The susceptibility of iron phases to microwave exposure and their selective absorption assists in the liberation of iron values. Microwave exposure of coarse particles at 540 W for 10 min yielded a concentrate with Fe …

Evaluation of Syenite as Feldspar Source: Piranshahr Pluton …

The syenites of Piranshahr pluton form homogeneous mesoperthite-rich rocks which are exposed over a large area (>30 km2). With >85% modal composition of feldspar and rare ferromagnesian minerals, the syenites are petrographically suitable for feldspar exploration. The chemical composition of the Piranshahr syenites (i.e., high Al2O3 and (Na2O + K2O)) is also …

Microwave Carbothermic Reduction of Low-Grade Iron Ore

The fayalite formation creates localized melt zones that form' hot-spots' for microwaves and enhances the heating rate and, consequently, the reduction kinetics. This study evaluates the carbothermal microwave reduction of low-grade banded hematite jasper iron ore for the preparation of potential feedstock for the a

Recovery of Iron from Copper Tailings Using a Combined

Iron in the form of fayalite in copper tailings poses a challenge for traditional beneficiation methods due to its fine particle size. In this work, iron present in copper tailings …

shibang/sbm diatomite beneficiation processing …

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