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Effect of ore solid concentration on the bioleaching of

01-10-2010· The effects of ore solid concentration on bioleaching of phosphorus from high-phosphorus iron ores using indigenous sulfur-oxidizing bacteria from municipal wastewater were investigated. The following conclusions were drawn from this study: 1. Generally, the slurry pH increased with increasing ore solid concentration with bioleaching time.

Effect of ore solid concentration on the bioleaching of

The effects of ore solid concentration on the phosphorus bioleaching were investigated. It was found most of phosphorus existed in the form of apatite in the iron ore. After bioleaching for 41 days, the final ore slurry pHs at all solid concentrations 10–300 g/L were between 0.09 and 0.63.

Effect of ore solid concentration on the bioleaching of

The effects of ore solid concentration on the phosphorus bioleaching were investigated. It was found most of phosphorus existed in the form of apatite in the iron ore. After bioleaching for 41 days, the final ore slurry pHs at all solid concentrations 10-300 g/L were between 0.09 and 0.63.

Effect of ore solid concentration on the bioleaching of

Effect of ore solid concentration on the bioleaching of phosphorus from high-phosphorus iron ores using indigenous sulfur-oxidizing bacteria from municipal wastewater Process Biochemistry ( IF 2.952) Pub Date : 2010-06-25, DOI: 10.1016/j.procbio.2010.06.013

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C. (2010) Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores

A rheological study of the bioleaching process of an iron

01-12-2019· In this work, we analyzed the bioleaching process of an ore concentrate, using SEM, XRD and rheometry. Impurities, such as zinc, were dissolved (about 50%) in 1 day. Bioleaching dissolved other impurities and increased the iron purity, with maximum reached at day 5.

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C. (2010) Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores

Studies on the bioleaching of refractory concentrates

However, at high ferric-iron concentrations (i.e. during periods of rapid bacterial growth), there is sufficient ferric-iron in solution to oxidize both the arsenopyrite and the dissolved arsenite. This results in the low arsenite and high arsenate concentrations observed during continuous bioleaching

Biomining: metal recovery from ores with

Bioleaching is a conversion of an insoluble valuable metal into a soluble form by means of microorganisms. In biooxidation, on the other hand, gold is predominantly unlocked from refractory ores in large-scale stirred-tank biooxidation arrangements for further processing steps. In addition to copper and gold production, biomining is also used

Bioleaching/bacterial Leaching Research Papers

Leaching experiments (2 % w/v ore, 1.8 initial pH, 180 rpm and 30°C) were carried out with the addition of different alternative energy sources (6.67 g/L sulphur powder, 1 g/L iron (II), 0.02% w/v yeast extract). Redox potential, pH, iron (II) concentration and total Fe and Zn were measured regularly. A 100% of iron leaching (after 28 days in

Effects of ore mineralogy on the microbial leaching of low

Effects of ore mineralogy on the microbial leaching of low grade complex sulphide ores P.A. Olubambia,b,⁎, S. Ndlovua, J.H. Potgietera, J.O. Borodeb a School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private bag 3, WITS 2050, Johannesburg, South Africa b Department of Metallurgical and Materials Engineering, Federal University of Technology, PMB 704,

Effect of temperature on bioleaching of iron impurities

Effect of temperature on bioleaching of iron impurities from kaolin by etc. Similarly, iron ores such as hematite may contain clays like kaolin as contam-ination that can cause problems in the operation of blast furnaces oxalic acid and pH concentrations in iron bioleaching by A. niger fungal. X-ray fluorescence

Effect of Na 2 CO 3 and CaCO 3 on coreduction roasting of

29-06-2017· Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores Using Indigenous Sulfur-Oxidizing Bacteria from Municipal Waste Water[J]. Process Biochemistry, 2010, 45(10): 1624–1631. Article Google Scholar [9]

Understanding the high-grade iron ore market

Iron ores can be formed of several different minerals; the most common are hematite and magnetite. DSOs, including the mid-grade products Rio Tinto and BHP produce from Australia’s Pilbara region and the high-grade 65% Fe fines Vale produces in Brazil, are predominantly hematite products.

Effect of particle-particle shearing on the bioleaching of

05-11-2002· Effect of particle-particle shearing on the bioleaching of sulfide minerals. Chong N(1), Karamanev DG, Margaritis A. Author information: (1)Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9.

(PDF) Activation of bacteria in agglomerated ores by

The data show a low pH and a high sulfate concentration in the raffinate, indicating that bacteria were not able to develop at the high ionic strength existing in the solutions, and therefore on the agglom- erated ore in the heaps. We have studied the effect of solutions with high sulfate concentrations on the bac- teria, and we have determined

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C. (2010) Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores

Studies on the bioleaching of refractory concentrates

However, at high ferric-iron concentrations (i.e. during periods of rapid bacterial growth), there is sufficient ferric-iron in solution to oxidize both the arsenopyrite and the dissolved arsenite. This results in the low arsenite and high arsenate concentrations observed during continuous bioleaching

Biomining: metal recovery from ores with microorganisms

Bioleaching is a conversion of an insoluble valuable metal into a soluble form by means of microorganisms. In biooxidation, on the other hand, gold is predominantly unlocked from refractory ores in large-scale stirred-tank biooxidation arrangements for further processing steps. In addition to copper and gold production, biomining is also used

Effect of Surface Area, Growth Media and Inert Solids on

teria-to-solid ratio (Komnitsas & Pooley 1991) and the build-up of toxic products (Bailey & Hansford 1993). In this study the effect of growth medium, particle size and pulp density, and inert solids on the bioleaching of a complex sulphide ore/concentrate was investigated using mesophilic and moderately thermophilic bacteria. 2 EXPERIMENTAL 2.

Bioleaching Research Papers Academia.edu

This effect can be attributed to the increase of contact time between ore and solution. The goal of this work was to assess the effect of using raffinate solution with elevated concentration of acid on a microbial culture obtained from process solutions.

Effect of pulp density on the bioleaching of metals from

25-02-2021· Bioleaching is one of the well-known methods of metal recovery with Environmental benefits. This process has been extensively used for combating improper waste management issues along with metal reclamation. The aim of this study is to bioleach spent petroleum refinery catalyst at variant pulp densities (PD) (5, 10 and 15%) using microorganisms in acidic pH (1.5–1.6) and

Effect of temperature on bioleaching of iron impurities

Effect of temperature on bioleaching of iron impurities from kaolin by etc. Similarly, iron ores such as hematite may contain clays like kaolin as contam-ination that can cause problems in the operation of blast furnaces oxalic acid and pH concentrations in iron bioleaching by A. niger fungal. X-ray fluorescence

Effects of ore mineralogy on the microbial leaching of low

Effects of ore mineralogy on the microbial leaching of low grade complex sulphide ores P.A. Olubambia,b,⁎, S. Ndlovua, J.H. Potgietera, J.O. Borodeb a School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private bag 3, WITS 2050, Johannesburg, South Africa b Department of Metallurgical and Materials Engineering, Federal University of Technology, PMB 704,

Bio leaching or biomining SlideShare

06-02-2018· Bioleaching : Solubilization of one or more components of complex solid by contact with liquid phase. Solubilization is mediated by bacteria. Hence, Bacterial leaching or Bioleaching. • Metal of interest is extracted from respective ores by bacterial action. • 2. Biooxidation: Bacterial oxidation of reduced Sulphur accompanying the metal.

Effect of Na 2 CO 3 and CaCO 3 on coreduction roasting of

29-06-2017· Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores Using Indigenous Sulfur-Oxidizing Bacteria from Municipal Waste Water[J]. Process Biochemistry, 2010, 45(10): 1624–1631. Article Google Scholar [9]

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C

Wang, J.C., Shen, S.B., Kang, J.H., Li, H.X. and Guo, Z.C. (2010) Effect of Ore Solid Concentration on the Bioleaching of Phosphorus from High-Phosphorus Iron Ores

Studies on the bioleaching of refractory concentrates

However, at high ferric-iron concentrations (i.e. during periods of rapid bacterial growth), there is sufficient ferric-iron in solution to oxidize both the arsenopyrite and the dissolved arsenite. This results in the low arsenite and high arsenate concentrations observed during continuous bioleaching

Biomining: metal recovery from ores with

Bioleaching is a conversion of an insoluble valuable metal into a soluble form by means of microorganisms. In biooxidation, on the other hand, gold is predominantly unlocked from refractory ores in large-scale stirred-tank biooxidation arrangements for further processing steps. In addition to copper and gold production, biomining is also used

Bioleaching/bacterial Leaching Research Papers

Leaching experiments (2 % w/v ore, 1.8 initial pH, 180 rpm and 30°C) were carried out with the addition of different alternative energy sources (6.67 g/L sulphur powder, 1 g/L iron (II), 0.02% w/v yeast extract). Redox potential, pH, iron (II) concentration and total Fe and Zn were measured regularly. A 100% of iron leaching (after 28 days in

Effects of ore mineralogy on the microbial leaching of low

Effects of ore mineralogy on the microbial leaching of low grade complex sulphide ores P.A. Olubambia,b,⁎, S. Ndlovua, J.H. Potgietera, J.O. Borodeb a School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Private bag 3, WITS 2050, Johannesburg, South Africa b Department of Metallurgical and Materials Engineering, Federal University of Technology, PMB 704,

Bioleaching Research Papers Academia.edu

This effect can be attributed to the increase of contact time between ore and solution. The goal of this work was to assess the effect of using raffinate solution with elevated concentration of acid on a microbial culture obtained from process solutions.

Minerals Free Full-Text The Evolution, Current Status

DISB combines indirect bioleaching, where the abiotic dissolution of a sulfidic ore or concentrate by an acidic, ferric iron-rich lixiviant and the biological regeneration of oxidised iron following the stripping of the target solubilised metal(s), are spatially separated (e.g., Reference ) with in situ leaching (ISL) which is, as noted, not a new concept.

(PDF) Activation of bacteria in agglomerated ores by

The data show a low pH and a high sulfate concentration in the raffinate, indicating that bacteria were not able to develop at the high ionic strength existing in the solutions, and therefore on the agglom- erated ore in the heaps. We have studied the effect of solutions with high sulfate concentrations on the bac- teria, and we have determined

Effect of Increased Acid Concentration on the Microbial

The material treated in the industrial heap bioleaching plant at Escondida Mine includes sulfide, oxide and mixtures of run of mine ore (ROM) with 5% of total copper average grade. The design of the heap considers seven lifts of eighteen meters height each. Nowadays, the heap is being operated with ore loaded in the second and third lifts. The amount of acid required for the process can be

The shift of microbial communities and their roles in

04-10-2016· The shift of microbial communities and their roles in sulfur and iron cycling in a copper ore bioleaching system. Sci. Rep. 6,34744; doi: 10.1038/srep34744 (2016).