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Microbial leaching of chromite overburden from Sukinda mines,
Introduction huge amount of chromite overburden containing 04% to 09% nickel and 002% to 005% cobalt is generated in the process of chromite ore mining in the2021年6月17日· Sukinda overburden is dumped with chromite ore tailing which contains about 17% Cr2O3 The other constituent with overburden is iron, silica and alumina Because of its complex nature and(PDF) Processing of Chromite Overburden by Soda
Characterizing toxic Cr(VI) contamination in chromite
2013年9月15日· Chromite mine overburden Bacillus sp Hexavalent chromium Bioreduction 1 Introduction Mining of ores and metal production processes result incontent During mining of chromite, a substantial quantity (nearly 8 to 10 times of the ore) of overburden is generated This chromite overburden from Sukinda mines, containingShort Communication: Leaching of Chromite overburden with
Chromite mining pollution, environmental impact, toxicity
2020年9月24日· The chromite mining process is largely related to the generation of a huge amount of wastes and rocks in the form of overburden (Dhakate and Singh 2008)The management of huge volumes of overburden at chromite mines is a concern, and there is a need to make effective use of this material Therefore, direct reduction of lowDirect reduction of low grade chromite overburden for recovery of
Microbial leaching of chromite overburden from Sukinda mines,
2013年8月7日· Leaching of nickel and cobalt from two physical grades (S1, 125–190 μm, coarser and S3, 53–75 μm, finer) of chromite overburden was achieved by treating thepartial chemical analysis of the Chromite Overburden shows that, the raw ore contains 087% nickel, 003% cobalt, 4888% iron, 188% chromium and 037% manganese, whereas the heattreatedXRD analysis of raw and roasted chromite overburden
Microbial leaching of chromite overburden from Sukinda mines,
International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 16744799, CN 115787/TF, monthly, started in 1994, formerly known as Journal of University of Science2013年4月10日· Leaching of nickel and cobalt from two physical grades (S1, 125190 μm, coarser and S3, 5375 μm, finer) of chromite overburden was achieved by treating the overburden (2% pulp density) with 21Microbial Extraction of Cobalt and Nickel from Lateritic Chromite
Characterisation of South African Chromite Middle Group Seams
mines are already exploiting other chromite layers within the Middle group, and these are the MG2, 3 and 4 [6] This might be due to depreciation of highgrade chromite seams Chromite processing involves crushing, milling to less than 1mm and further beneficiation using gravity circuits and spiral concentrators are widely used for this purpose2014年10月1日· BACKGROUND Leaching kinetics of the roasted (at 600°C) chromite overburden of Sukinda mines Orissa, India, was studied with optimized data generated through response surface methodology (RSM) coupled with Box‐Behnken design (BBD) The effects of oxalic, citric and gluconic acid concentration (50–150 mmol L−1), reactionOptimization of process parameters and dissolution kinetics
Bioleaching of Nickel and Cobalt from Lateritic Chromite Overburden
2013年5月23日· Extraction of metals (Ni, Co) from chromite overburden of Sukinda mines of Orissa, India, with the culture filtrate of Aspergillus niger was studied Results showed that the amounts of metals leached varied directly with reaction temperature and period of fermentation The culture filtrate was analyzed for citric and oxalic acids, and containedContext in source publication partial chemical analysis of the Chromite Overburden shows that, the raw ore contains 087% nickel, 003% cobalt, 4888% iron, 188% chromium and 037% manganeseXRD analysis of raw and roasted chromite overburden
Iron and Nickel Enrichment in Low Grade Chromite Overburden
2021年3月16日· Chromite overburden (COB), considered as a waste material with 46% Fe and 08% Ni, is the only source of nickel in India Iron and nickel from COB were recovered through reduction roasting, magnetic separation and smelting In sintering, maximum Ni% was achieved at 10% S, 10% C inside and 10% C outside of the COBISSN: 09758585 AprilJune 2013 RJPBCS Volume 4 Issue 2 Page No 741 MATERIALS AND METHODS Materials The chromite overburden sample was collected from the mining site of Kaliapani openResearch Journal of Pharmaceutical, Biological and Chemical
Preparation of Potassium Dichromate Crystals from the Chromite
2017年10月18日· In the present investigation, the oxidizing roasting process of chromite with sodium carbonate to prepare potassium dichromate crystals was studied in the microwave field with air, by heating the chromite and sodium carbonate The chromite and sodium carbonate heated separately at 1000 °C in the microwave oven (frequency: 2年6月20日· 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 due to(Bio)leaching Behavior of Chromite Tailings MDPI
(PDF) Nickel recovery from chromite overburden of Sukinda
2009年1月1日· The in situ nickel leaching efficiency of a laboratory stock culture of A niger showed maximum recovery of 34% nickel with roasted chromite overburden, at 2% pulp density, while 32% nickel wasISSN: 09758585 Research Journal of Pharmaceutical, Biological and Chemical Sciences Microbial Extraction of Cobalt and Nickel from Lateritic Chromite Overburden using Aspergillus wentii Supratim Biswas1*,Microbial Extraction of Cobalt and Nickel from Lateritic
New prospective for the utilisation of Indian lateritic
Chromite overburden (COB) has been reported to contain lowgrade nickeliferous laterite which requires a suitable technology to extract the value added metal Bioleaching methods using indigenous micronickeliferous chromite overburden Position[*2Theta] Counts Figure 2: Xray diffraction analysis of overburden material Table 1: Chemical analysis of raw materials Item Chemical analysis, wt (%) Fe(t) Cr2O3 CaO MgO SiO2 Al2O3 NiO Chromite overburden 460 149 006 25 403 67 08 Lime 29 646 09 19 005 PROCESS FOR EFFECTIVE UTILIZATION OF LOW GRADE CHROMITE OVERBURDEN
Extraction of nickel by microbial reduction of lateritic chromite
2012年12月1日· Microbial extraction of nickel from lateritic chromite overburden (COB), Sukinda by Acidithiobacillus ferrooxidans has been investigated in this work In anoxic environment, A ferrooxidans reduced the ferric iron in goethite [Fe(O)OH] mineral of COB by using elemental sulphur as electron donor Nickel embedded in the complex goethite2021年1月21日· Also, a noticeable amount of potassium is detected in some samples, expected as cryptomelane mineral in parent ore The ores(h, i, and j) denote chromite tailings, overburden, and lean grade ore, respectively, where Cr 2 O 3 content is limited to 16% These chromite samples are ironrich and also differ in silica and alumina contentsThermal Transformation of Oxide and Hydroxide Minerals in Chromite
Pelletization of a LowGrade Indian Chromite Overburden
2023年8月22日· Highquality pellets have been developed from a lowgrade Indian chromite overburden containing high silica in the present study The thermodynamic, hotstage microscopic, and thermogravimetricThe XRD analysis of the residue of roasted chromite overburden leached with 21d culture filtrate for 3 h shows loss of hematite peaks with concomitant appearance of jarosite peaks along with siliXRD patterns of raw, roasted, and roasted chromite overburden
Feasibility of nickel extraction from Indian chromite overburden
2020年1月1日· The in situ nickel leaching efficiency of a laboratory stock culture of A niger showed maximum recovery of 34% nickel with roasted chromite overburden, at 2% pulp density, while 32% nickel was2018年6月4日· In a novel method of beneficiation of lowgrade chromite ore, nuggets, 25 mm in diameter and 10 mm long, made of chromite ore and coke fines, are subjected to partial reduction A significant degree of reduction of iron oxide is observed at temperatures of 1373–1523 K up to a reduction time of 240 min, and subsequent magnetic separationKinetic Studies on the Reduction of Iron Oxides in LowGrade Chromite
24 SHORT COMMUNICATION CHERIC
Dissolution kinetics of chromite overburden by using mineral acids P K Swain, Gautam Roy Chaudhury† and L B Sukla Regional Research Laboratory, Bhubaneswar 751 013, India (Received 6 June 2006 • accepted 3 April 2007) Abstract−Two different mineral acids were used to determine the kinetics of dissolution of Ni and Fe from chromite