chromite leaching chemicals

Acid leaching of chromite ScienceDirect

1994-5-1 An alternative method for the production of chromium chemicals is leaching the chromite ore in alkali or acidic media. Direct pressure leaching of chromite using sodium

A clean and efficient leaching process for chromite ore

2014-6-1 Table 1 shows the chemical composition of a typical chromite ore sample, indicating that besides chromium and iron, aluminum, magnesium and silicon are the main

Leaching of Valuable Elements from the Waste Chromite

2020-8-11 leaching after mixing chromite, sodium carbonate (Na 2

Chemistry and Leaching Behavior of Chromite Ore

2018-11-5 This study presents chemical, mineralogical, and leaching characterization of chromite ore processing residue (COPR) derived from the soda ash process, which is

Pressure oxidative leaching of Indian chromite ore in

2014-2-1 A novel process for leaching chromite ore has been proposed. Compared to the traditional alkaline roasting process, the new hydrometallurgical process lowers

Sulfuric acid leaching of Turkish chromite concentrate

2002-11-1 Chromite is the only commercial ore mineral of chromium. Industrially, chromium chemicals are mainly produced by NaOH fusion followed by leaching. Kromsan is the name of

(Bio)leaching Behavior of Chromite Tailings

Chromite beneficiation operations in Sukinda valley (India) produce large amounts of tailings, which are stored in open air. In this study, bioleaching experiments

Effect of mechanical activation on alkali leaching of

2010-5-1 Key words: mechanical activation; chromite ore; leaching 1 Introduction Chromite ore is widely used in metallurgical and chemical industries for the production

LEACHABILITY OF CHROME FROM MAGNESIA

2016-2-25 EXPERIMENTAL The experimental program is focused on leaching of the corroded magnesia-chromite refractory bricks from the copper refining furnace in water. The crucibles

Mineral processing: leaching process of chromium and

2019-5-6 The influence of roasting temperature (960–1200 °C) and leaching agents (H 2 O, HCl, H 2 SO 4) and their concentrations on the recovery of PGMs was studied. Chromite

Leaching of Valuable Elements from the Waste Chromite

2020-8-11 the chromite spinel structure (magnesiochromite) and the surface chemical reaction of the spinel may control the leaching process. However, aluminum mainly exists in MgFeAlO 4, and its leaching is much easier, and at temper-atures of 373, 383, 393, and 403 K, the R2 value of model 1−2/ 3X − (1 − X)2/3 is greater than that of the model 1

(Bio)leaching Behavior of Chromite Tailings

Chromite beneficiation operations in Sukinda valley (India) produce large amounts of tailings, which are stored in open air. In this study, bioleaching experiments were carried out in batch reactors with Acidithiobacillus thiooxidans or Pseudomonas putida in order to determine the potential leachability of metals contained in these tailings

Treatability of chromite ore processing waste by leaching

Download Citation Treatability of chromite ore processing waste by leaching Developing treatment and disposal strategies and health-based clean-up standards for chromium containing wastes

(PDF) (Bio)leaching Behavior of Chromite Tailings

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%.

Mineral processing: leaching process of chromium and

2019-5-6 Reagents and materials. All chemicals and solvents used were of analytical reagent grade. Low density polyethylene (LDPE) bottles, Nalgene were carefully cleaned first with hot detergent, soaked in 50% HCl (Analar), HNO 3 (2.0 mol L −1), subsequently washed with dilute HNO 3 (0.5 mol L −1) and finally rinsed with distilled water.LDPE bottles were used for leaching experiments of the

Treatability of chromite ore processing waste by leaching

Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). Although the high temperature chromite process was

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

LEACHABILITY OF CHROME FROM MAGNESIA

2016-2-25 Keywords: Environment, Corrosion, Magnesia-chromite refractory, Alkali leaching The interactions of magnesia-chromite refractory brick with Cu-Na 2 O·2SiO 2 and CuO-Na 2 O·2SiO 2 melts are studied and the chemical durability of corrosion products in water is evaluated. The corrosion tests confirm intensive infiltration of the

Rapid Analysis of Chromite and Chrome Ore

2010-8-6 chemical work, however, continued practice of this convention can be misleading. For example, expressing the result of an analysis for A12O3 in chromite as 29.84 percent implies that the analyst is confident of his result to better than 1 part in 1,000. This would be presump

Chromite—A cost-effective refractory raw material for

2011-3-3 Of these oxides, chrome in the form of chromite is the most cost effective. Depending on its chemical composition each type of refractory material will be more compatible with certain chemical and physical environments than with others Refractories are also classified according to their form: 1. Shaped refractories—essentially bricks 2.

Chemistry and Leaching Behavior of Chromite Ore

2018-11-5 This study presents chemical, mineralogical, and leaching characterization of chromite ore processing residue (COPR) derived from the soda ash process, which is currently replacing the lime-based process in China, the world's largest chromite processor.

Treatability of chromite ore processing waste by leaching

Download Citation Treatability of chromite ore processing waste by leaching Developing treatment and disposal strategies and health-based clean-up standards for chromium containing wastes

Treatability of chromite ore processing waste by leaching

Chromite ore processing residue (COPR) is a waste byproduct of chromate production that contains high levels of hexavalent chromium (Cr[VI]). Although the high temperature chromite process was

(PDF) (Bio)leaching Behavior of Chromite Tailings

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%.

Sulfuric acid leaching kinetics of South African chromite

(PDF) Leaching Mechanisms of Cr(VI) from Chromite Ore

Batch leaching tests, qualitative and quantitative x-ray powder diffraction (XRPD) analyses, and geochemical modeling were used to investigate the leaching mechanisms of Cr(VI) from chromite ore

Use of Selected Industrial Waste Materials in Concrete

2010-7-23 Commercially, chromite ore is processed to produce sodium chromite and other chromium chemicals such as sodium chromite, chromic acid, and chromium sul-phate. Chromium leaching from deposited sites is of high environmental relevance associated with the contamination of natural resources with toxic hexava-lent chromium Cr61. In the environment

Chromite—A cost-effective refractory raw material for

Rapid Analysis of Chromite and Chrome Ore

(PDF) Chemical Degradation Mechanisms of

2018-8-15 Magnesia–chromite refractory has been extensively used in the copper-making industry. It is necessary to understand the degradation mechanisms of the current refractory to develop new refractories.

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