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leaching with sulfuric acid of the chromite plant

Sulfuric acid leaching of Turkish chromite concentrate

01/11/2002· In this research work the sulfuric acid leaching of a typical Turkish chromite concentrate was studied. The following was concluded considering the experimental results: 1. In the absence of perchloric acid, the maximum chromium extraction was about 58% under the conditions of 175 °C, 70 vol% H 2 SO 4 (81.4 wt.%) and 2 h. 2.

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Sulfuric acid leaching of South African chromite. Part 1

10/07/2014· The leaching behavior of chromite by sulfuric acid in the presence of oxidant was studied experimentally in this work, where most tests were carried out at 160 °C.The results indicated that magnesium and aluminum were leached out together from the silicate phase and porous amorphous silica was produced as a product layer, while the spinel phase gradually shrank with the duration of leaching.

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Sulfuric acid leaching of South African chromite. Part 1

The leaching behavior of chromite by sulfuric acid in the presence of oxidant was studied experimentally in this work, where most tests were carried out at 160 °C.The results indicated that magnesium and aluminum were leached out together from the silicate phase and porous amorphous silica was produced as a product layer, while the spinel phase gradually shrank with the duration of leaching.

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Sulfuric acid leaching of South African chromite. Part 1

The leaching behavior of chromite by sulfuric add in the presence of oxidant was studied experimentally in this work, where most tests were carried out at 160 degrees C. The results indicated that magnesium and aluminum were leached out together from the silicate phase and porous amorphous silica was produced as a product layer, while the spinel phase gradually shrank with the duration of

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(PDF) Sulfuric acid leaching of Turkish chromite concentrate

The optimum process conditions of leaching treatment were found to be a temperature of 176 °C, a dichromic acid/chromite mass ratio of 0.12, and a sulfuric acid concentration of 81%. Furthermore

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Sulfuric acid leaching of South African chromite. Part 1

The leaching behavior of chromite by sulfuric acid in the presence of oxidant was studied experimentally in this work, where most tests were carried out at 160 °C.The results indicated that magnesium and aluminum were leached out together from the silicate phase and porous amorphous silica was produced as a product layer, while the spinel phase gradually shrank with the duration of leaching.

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Sulfuric acid leaching of South African chromite. Part 2

10/07/2014· The initial results of the investigation of sulfuric acid leaching of South African chromite are reported in part 1 of this study (Zhao et al., 2014). Results given in the present part showed that the extraction yield of chromium exhibited an increasing trend with temperature until 180 °C was reached. Above this temperature sulfates, including

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Study on mechanisms of different sulfuric acid leaching

The extraction of chromate from chromite via the sulfuric acid leaching process has strong potential for practical use because it is a simple and environmentally friendly process. This paper aims to study the sulfuric acid leaching process using chromite as a raw material via either microwave irradiation or in the presence of an oxidizing agent. The results show that the main phases in

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Sulfuric acid leaching of South African chromite. Part 1

The leaching behavior of chromite by sulfuric add in the presence of oxidant was studied experimentally in this work, where most tests were carried out at 160 degrees C. The results indicated that magnesium and aluminum were leached out together from the silicate phase and porous amorphous silica was produced as a product layer, while the spinel phase gradually shrank with the duration of

More

(PDF) Sulfuric acid leaching of Turkish chromite

The optimum process conditions of leaching treatment were found to be a temperature of 176 °C, a dichromic acid/chromite mass ratio of 0.12, and a sulfuric acid concentration of 81%. Furthermore

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CN101979679A Method for treating chromite by sulfuric

The invention discloses a method for treating chromite by sulfuric acid leaching, which comprises the following steps of: grinding the chromite into mineral powder, adding sulfuric acid into the mineral powder, stirring the mixture, and adding an oxidant into the mixture, wherein the oxidant is chromic anhydride, potassium chlorate or ammonium persulphate, and the adding amount of the oxidant

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Sulfuric acid leaching kinetics of South African chromite

The sulfuric acid leaching kinetics of South African chromite was investigated. The negative influence of a solid product layer constituted of a silicon-rich phase and chromium-rich sulfate was eliminated by crushing the chromite and by selecting proper leaching conditions. The dimensionless change in specific surface area and the conversion rate of the chromite were observed to exhibit a

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Sulfuric Acid Processing for the Production of Chromite

Sulfuric Acid Processing for the Production of Chromite Concentrates from Donskoy Ore-Mining and Processing Plant Slurry Tails Rinat A. Abdulvaliyev, Sergey S. Gladyshev, Nazym K. Akhmadiyeva*, Kulzhaiyk O. Beisembekova, Saltanat A. Omarova, Alfiyam I. Manapova, Galiyaт S. Ruzakhunova and Marina N. Kvyatkovskaya Institute of Metallurgy and Ore beneficiation 29/133, Shevchenko Str.,

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Hot Filtration: A Way to Enhance the Recovery of Chromite

Hot Filtration: A Way to Enhance the Recovery of Chromite in Sulfuric Acid Leaching, with or without the Addition of Perchloric Acid EmreUSTAOGLU˘ Ere˘gliMah. Deniz AbdalCamiiSok. No:6/434104 C¸apa, Istanbul-TURKEY˙ e-mail: [email protected] AhmetGEVECI˙ DepartmentofMetallurgicaland MaterialsEngineering,RoomE-217,

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Leaching of minerals using sulfuric acid reactionchamber

Leaching of minerals using sulfuric acid. Sulfuric acid is considered a very strong and cheap acid. Most of it is used to break down minerals. This means the conversion of the generally very poorly soluble minerals into a substance from which the element or the desired compound can be more easily isolated. Extraction of raw titanium. Titanium ores are primarily the naturally red-colored rutile

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