leaching with sulfuric acid of the chromite plant
leaching with sulfuric acid of the chromite plant
Zhengzhou, Henan China
24 hours At your service

leaching with sulfuric acid of the chromite plant

  • Home
  • / Product
  • / leaching with sulfuric acid of the chromite plant

Sulfuric acid leaching of Turkish chromite concentrate ...

2002-11-1  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.

More

Sulfuric acid leaching of South African chromite. Part 1 ...

2014-7-10  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

More

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 ...

More

(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 ...

More

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 phases in ...

More

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 observed to exhibit a ...

More

Sulfuric acid leaching kinetics of South African chromite ...

2015-3-1  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 ...

More

Recovery of chromium from residue of sulfuric acid ...

2018-1-1  For the sulfuric acid leaching process of chromite, the produced Cr-rich leachate has usually pH ≈ −1.5, which needs to be adjusted pH > 2 for subsequent treatments. On the basis of this and the experimental findings from this work, the Cr-rich solution obtained from chromium recovery can be used for the pH adjustment, and the unreacted ...

More

Decomposition mechanism of chromite in sulfuric acid ...

2017-12-13  The sulfuric acid leaching process is regarded as a promising, cleaner method to prepare trivalent chromium products from chromite; however, the decomposition mechanism of the ore is poorly understood. In this work, binary spinels of Mg–Al, Mg–Fe, and Mg–Cr in the powdered and lump states were synthesized and used as raw materials to investigate the decomposition mechanism of chromite

More

A STUDY OF LEACHING OF COPPER OXIDE ORE BY

A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as

More

(PDF) Sulfuric acid leaching of Turkish chromite ...

Leaching of chromite with sulfuric acid only by weight. The reaction between a simple chromite and sulfuric 4.1.2. Effect of temperature acid is given as (Gupta and Mukherjee, 1990), Fig. 2 shows a plot for the extraction of chromium as Cr2 O3 FeO þ 4H2 SO4 !

More

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 phases in ...

More

Study on mechanisms of different sulfuric acid leaching ...

2016-12-11  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.

More

(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 ...

More

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 ...

More

Sulfuric Acid Leaching of South African Chromite. Part 2 ...

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 ...

More

Decomposition mechanism of chromite in sulfuric acid ...

2017-12-13  The sulfuric acid leaching process is regarded as a promising, cleaner method to prepare trivalent chromium products from chromite; however, the decomposition mechanism of the ore is poorly understood. In this work, binary spinels of Mg–Al, Mg–Fe, and Mg–Cr in the powdered and lump states were synthesized and used as raw materials to investigate the decomposition mechanism of chromite

More

Hot Filtration: A Way to Enhance the Recovery of

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,

More

Sulfuric acid baking and leaching of spent Co-Mo/Al2O3 ...

Dissolution of metals from a pre-oxidized refinery plant spent Co-Mo/Al(2)O(3) catalyst have been tried through low temperature (200-450 degrees C) sulfuric acid baking followed by mild leaching process. Direct sulfuric acid leaching of the same sample, resulted poor Al and Mo recoveries, whereas le

More

A STUDY OF LEACHING OF COPPER OXIDE ORE BY

A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 ...

More

(PDF) Sulfuric acid leaching of Turkish chromite ...

Leaching of chromite with sulfuric acid only by weight. The reaction between a simple chromite and sulfuric 4.1.2. Effect of temperature acid is given as (Gupta and Mukherjee, 1990), Fig. 2 shows a plot for the extraction of chromium as Cr2 O3 FeO þ 4H2 SO4 !

More

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 observed to exhibit a ...

More

(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 ...

More

Sulfuric Acid Leaching of South African Chromite. Part 2 ...

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 ...

More

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 ...

More

Hot Filtration: A Way to Enhance the Recovery of

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,

More

Experimental Study on Sulfuric Acid Leaching Behavior of ...

Utilizing Pakistan chromite as raw material, the rapid leaching of chromium and iron could be realized by the sulfuric acid leaching process on the condition of atmospheric pressure and the addition of oxidant A. And the leaching rate of chromium and iron would be 98.5% and 71.9%, respectively. The sulfuric acid leaching processes with different temperature were systematically studied by ...

More

Cleaner Production of Chromium Oxide from Low Fe(II)

Sulfuric acid-based leaching is a promising cleaner method to produce chromium salts, but its feasibility for treating low Fe(II)-chromite still remains to be proven. A Box–Behnken design (BBD)-based set of experiments for sulfuric acid leaching of low

More

A STUDY OF LEACHING OF COPPER OXIDE ORE BY

A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 ...

More

leaching process for chromite saudi arabia

Nordic is a free Bootstrap HTML Template. silicon sand processing for copper in saudi arabia. leaching with sulfuric acid of the chromite plant leaching process for chromite saudi arabia grinding leaching process for chromite saudi arabia ...

More