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leaching with sulfuric acid of the chromite plant

leaching with sulfuric acid of the chromite plant

2022-7-2  Sulfuric acid leaching of South African chromite Part 2,Jul 10, 2014 0183 32 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 180 176 C was reached

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Sulfuric acid leaching of Turkish chromite concentrate

2002-11-1  Fig. 2 shows a plot for the extraction of chromium as a function of temperature for 2 h leaching duration and 90 vol% of sulfuric acid. The extraction of chromium increased from about 10% to 47% as the temperature was increased from 140 to 175 °C. However, when the temperature was increased further from 175 to 210 °C, the extraction of chromium remained

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Leaching With Sulfuric Acid Of The Chromite Plant

Sulfuric acid leaching of Turkish chromite concentrate. Nov 01, 2002In 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 (814

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leaching with sulfuric acid of the chromite plant

Sulfuric acid leaching of South African chromite Part 2 . 10/07/2014 The effects of temperature, duration, sulfuric acid concentration and oxidant on the leaching of South African chromite were investigated in this work It was found that the extraction yield of chromium increased with temperature, limited by a chromiumrich sulfate precipitating from the solution when the

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Leaching With Sulfuric Acid Of The Chromite Plant

2021-12-16  Sulfuric acid leaching of South African chromite Part. Jul 10, 2014 Jul 10, 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.

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Sulfuric acid leaching kinetics of South African chromite

2014-6-3  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

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Chromium Leaching from Chromite Ore by Sulfuric Acid

2009-3-6  The optimum leaching conditions were (6 M) sulfuric acid concentration, (60 min) leaching time, and the temperature was (25 C o). View full-text Last Updated: 05 Jul 2022

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Sulfuric acid leaching of Turkish chromite concentrate

2002-11-1  The reaction between a simple chromite and sulfuric acid is given as (Gupta and Mukherjee, 1990), Cr 2 O 3 · FeO +4 H 2 SO 4 → Cr 2 (SO 4) 3 + FeSO 4 +4 H 2 O However, since the structure of chromite spinel is more complex than given by this equation, the amount of water molecules and the valency level of aqueous sulfates cannot be known

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leaching with sulfuric acid of the chromite plant

Sulfuric acid leaching of South African chromite Part 2 . 10/07/2014 The effects of temperature, duration, sulfuric acid concentration and oxidant on the leaching of South African chromite were investigated in this work It was found that the extraction yield of chromium increased with temperature, limited by a chromiumrich sulfate precipitating from the solution when the

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Leaching With Sulfuric Acid Of The Chromite Plant

Sulfuric acid leaching of Turkish chromite concentrate. Nov 01, 2002In 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 (814

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(PDF) Sulfuric acid leaching of Turkish chromite

2002-11-1  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 2:

2014-7-10  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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Leaching With Sulfuric Acid Of The Chromite Plant

2021-12-16  Sulfuric acid leaching of South African chromite Part. Jul 10, 2014 Jul 10, 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.

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Sulfuric acid leaching kinetics of South African chromite

2015-3-4  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

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leaching with sulfuric acid of the chromite plant

Innovations How Hydrometallurgy and the SX/EW. Leaching Smelting uses heat copper is removed from rock using weak sulfuric acid solutions From there it is pumped to tanks at a solution extraction plant on Sulfuric acid leaching of Turkish chromite concentrate The tailing generated from the Turkish chromite beneficiation plants were How Hydrometallurgy and the

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(PDF) Sulfuric acid leaching of Turkish chromite

2002-11-1  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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leaching with sulfuric acid of the chromite plant

2019-1-9  The sulfuric acid leaching behavior of the chromite in Zhao et al ’s study can be illustrated as shown in Figure 3, where four types of spinel, denoted as I, II, III, and IV, represent different states at specific stages of the leaching process Spinel I shows that the particle becomes smaller with the duration of the leaching.

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leaching with sulfuric acid of the chromite plant

2022-5-17  acid method for high cocentration of gold ore Know More. Gold treatment with sulfuric acid is the process of,citric acid leach and AAS finish,chromite,,In the pre-treatment tests, acid leaching with/without.

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Sulfuric acid leaching kinetics of South African chromite

2014-6-3  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

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Study on mechanisms of different sulfuric acid leaching

2017-9-5  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

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OPTIMIZATION OF CONDITIONS IN SULFURIC ACID

94.1 % under the conditions of 175 °C, 6 hours and 84.6 wt % sulfuric acid. The maximum extraction of chromium in the presence of perchloric acid was 98.7 % under the conditions of 175 °C, 2 hours, 84.6 wt % sulfuric acid and ½ perchloric acid / chromite ratio. The latter one was also the highest recovery value obtained

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acid leaching process chromite ore

how to process chromite ore . of electrolytic Acid leaching of chromite TABLE 3 . with caustic of the chromite plant leaching process for . Lateritic nickel ore deposits Lateritic nickel ore deposits are surficial, . are highly enriched in iron due to

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