Nickel Bioleaching at Elevated pH: Research and Application

2017 ◽  
Vol 262 ◽  
pp. 197-201 ◽  
Author(s):  
Jian Zhi Sun ◽  
Bo Wei Chen ◽  
Jian Kang Wen ◽  
Biao Wu
Keyword(s):  
Nickel Sulfide ◽  
Industrial Applications ◽  
Low Grade ◽  
Sulfide Ores ◽  
Leaching Rate ◽  
Sulfide Deposits ◽  
Acid Consumption ◽  
Sulfide Ore ◽  
The Cost ◽  
Experimental Researches

Biohydrometallurgy has broad application prospect in the treatment of low-grade nickel sulfide ore. However, quite a number of nickel sulfide deposits are associated with basic gangue minerals such as contain olivine, serpentine. The high basic gangue minerals will lead to a higher acid consumption and make it difficult to bioleach at pH below 2.5. It is crucial to improve processes and adapt bacteria with this kind of ore. This paper reviews the experimental researches and industrial applications for bioleaching of the high acid consumption nickel sulfide ores. It is suggested that bioleaching at elevated pH will have similar leaching rate compared with pH below 2.5, meanwhile the cost will be decreased remarkably due to a lower acid consumption and less dissolved impurity ions.

Leaching of a low-grade, copper–nickel sulfide ore

2009 ◽  
Vol 98 (1-2) ◽  
pp. 66-72 ◽  
Author(s):  
M. Maley ◽  
W. van Bronswijk ◽  
H.R. Watling
Keyword(s):  
Nickel Sulfide ◽  
Low Grade ◽  
Copper Nickel ◽  
Sulfide Ore

Investigation of Bioleaching of a Low Grade Nickel-Cobalt-Copper Sulfide Ore with High Magnesium as Olivine and Serpentine from Lao

2013 ◽  
Vol 825 ◽  
pp. 396-400 ◽  
Author(s):  
Bo Wei Chen ◽  
Liu Lu Cai ◽  
Biao Wu ◽  
Xue Liu ◽  
Jian Kang Wen
Keyword(s):  
Copper Sulfide ◽  
Nickel Sulfide ◽  
Low Grade ◽  
Nickel Cobalt ◽  
Nickel Silicate ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Initial Ph ◽  
Copper Sulfide Ore ◽  
Cobalt Copper

Shake flask bioleaching of a low-grade nickel-cobalt-copper sulfide ore from Lao was investigated to test the technical feasibility to recovery metals from this ore. The mineralogical results indicated that the valuable minerals were disseminated finely and the ore had a low content of sulfur and high content of iron and magnesium, which was very harmful for bioleaching. The effects of different parameters such as the amount of acid addition, inoculation volume, initial pH, temperature and leaching time on the bioleaching performance of the ore were evaluated after pre-leaching with dilute acid. The results showed that nickel, cobalt, copper leaching rates reached 81.61%, 80.75%, 70.97% at 33 °C and 83.40%, 82.13%, 70.34% at 45 °C. The mineralogical analysis of the leaching residues revealed that the leaching rate of nickel sulfide was more than 92% and the unleached nickel was mainly present as nickel silicate.

Bio-Heap Leaching of Primary Copper Sulfide Ore by JOGMEC

2017 ◽  
Vol 262 ◽  
pp. 99-102
Author(s):  
Tatsuya Shinkawa ◽  
Tadashi Chida ◽  
So Furukawa ◽  
Taro Kamiya
Keyword(s):  
Copper Sulfide ◽  
Heap Leaching ◽  
Sulfide Ores ◽  
High Iron Content ◽  
Iron Oxidizing Bacteria ◽  
Acid Consumption ◽  
Sulfide Ore ◽  
Leaching Solution ◽  
Sulfur Oxidizing ◽  
Copper Sulfide Ore

JOGMEC has been carrying out the study on primary copper sulfide ores leaching for recovering copper economically and efficiently by heap leaching. In our study, we have been using the primary copper sulfide ore produced in an IOCG deposit. The ore is characterized by high iron content and high acid consumption in leaching. For the optimization of the leaching, the conditions such as ore size, agglomeration, pH and irrigation rate of leaching solution were examined with column leach tests. The best result was over 80 % extraction of copper in 150 days with leaching solution of 1 M sulfuric acid and temperature of 45 °C. In this experiment, the fines of the ore sample were removed before putting it into the column to keep the permeability of the ore bed. In these column leach tests, the Fe2+/total-Fe ratio of PLS decreased gradually by the activity of naturally grown iron-oxidizing bacteria. The bacteria in PLS, which have the ability of iron-oxidizing and sulfur-oxidizing, were identified by next-generation sequencing as Acidithiobacillus caldus and Sulfobacillus thermosulfidooxidans. We also carried out bench-scale tests with about 200 tons of the primary copper sulfide ores. Iron-oxidizing and sulfur-oxidizing bacteria were identified in the leaching solution as same with column leach tests. It is considered that the bacteria worked in the leaching solution and on the surface of the ores.

Sulfide fabrics in some nickel sulfide ores from Kambalda, Western Australia

1978 ◽  
Vol 15 (4) ◽  
pp. 501-515 ◽  
Author(s):  
J. Ostwald ◽  
J. Lusk
Keyword(s):  
Western Australia ◽  
Triple Junction ◽  
Nickel Sulfide ◽  
Sulfide Ores ◽  
Thermal Event ◽  
Grain Sizes ◽  
Sulfide Ore ◽  
Subsequent Deformation ◽  
Monoclinic Pyrrhotite

Pyrrhotite and pentlandite fabric studies were carried out on oriented cubes of nickel sulfide ore from the tabular Durkin and Lunnon shoots associated with the Archaean Kambalda dome. Grain sizes, grain shapes, triple junction angles and preferred dimensional and lattice orientations were determined for the monoclinic pyrrhotite. Spatial orientations were determined also for pentlandite foliation and lineation in the same samples.Two distinct pyrrhotite grain morphologies were identified. The foliated pyrrhotite comprises a flattened variety, and an equant variety occurs as microvolumes within the former. Pyrrhotite foliations are separated from pentlandite foliations by consistently small angles.The pyrrhotite and pentlandite foliations are acquired features that developed at about the same time, probably following the peak of the principal dynamo-thermal event. Subsequent deformation(s)and recrystallization produced rotations within the ores and the equant pyrrhotite that crystallized from the flattened variety.

Extraction of Copper and Nickel from Low-Grade Nickel Sulfide Ore by Low-Temperature Roasting, Selective Decomposition and Water-Leaching Process

JOM ◽  
2019 ◽  
Vol 71 (12) ◽  
pp. 4647-4658 ◽  
Author(s):  
Wenning Mu ◽  
Zhipeng Huang ◽  
Haixia Xin ◽  
Shaohua Luo ◽  
Yuchun Zhai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nickel Sulfide ◽  
Low Grade ◽  
Water Leaching ◽  
Leaching Process ◽  
Sulfide Ore

Cations stress on low-grade nickel sulfide ore oxidation leaching

2020 ◽  
Vol 27 (11) ◽  
pp. 3278-3289
Author(s):  
Jin-xing Kang ◽  
Xin Wang ◽  
Ya-yun Wang ◽  
Zhao-bo Liu ◽  
Guo-qiang Han ◽  
...  
Keyword(s):  
Nickel Sulfide ◽  
Low Grade ◽  
Sulfide Ore

scholarly journals Electrochemical Behavior of Ocean Polymetallic Nodules and Low-Grade Nickel Sulfide Ore in Acidithiobacillus Ferrooxidans-Coupled Bio-Leaching

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 70 ◽  
Author(s):  
Jin-Xing Kang ◽  
Ya-Li Feng ◽  
Hao-Ran Li ◽  
Zhu-Wei Du ◽  
Xiang-Yi Deng ◽  
...  
Keyword(s):  
Electrochemical Behavior ◽  
Acidithiobacillus Ferrooxidans ◽  
Nickel Sulfide ◽  
Charge Transfer Resistance ◽  
Product Layer ◽  
Low Grade ◽  
Transfer Resistance ◽  
Polymetallic Nodules ◽  
Sulfide Ore ◽  
Efficient Extraction

Efficient extraction of Ni, Co, Cu, and Mn from low-grade and refractory ores is a common technical challenge. The present study proposes an Acidithiobacillus ferrooxidans-coupled leaching of Ni, Cu, Co, and Mn from oceanic polymetallic nodules and low-grade nickel sulfide ore, and focuses on the electrochemical behavior of the ores in simulated bio-leaching solutions. In the dissolution of polymetallic nodules, A. ferrooxidans facilitates the diffusion of H+ and accelerates electron transfer, producing a decrease in charge transfer resistance and promoting the Mn(IV)-preceding reaction. The use of A. ferrooxidans is beneficial for lower impedance of sulfur-nickel ore, faster diffusion rate of product layer, and better transformation of the Fe3+/Fe2+ couple and S0/S2− couple. A. ferrooxidans increases the potential difference between the nodule cathode and sulfide anode, and increases electron liberation from the sulfide ore. This motivates a significant increase in the average extraction rates of Ni, Co, Cu, and Mn in the bacterial solution. The bio-leaching efficiencies of Ni, Co, Cu, and Mn were as high as 95.4%, 97.8%, 92.2% and 97.3%, respectively, representing improvements of 17.1%, 11.5%, 14.3% and 12.9% relative to that of the germ- and Fe(III)-free acidic 9 K basic system.

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