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Silver-catalyzed bioleaching for raw low-grade copper sulphide ores

Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3, Pages 250-254 doi: 10.1007/s11705-009-0049-0

Abstract: conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphideores located in the Xinjiang Autonomous Region of China using adapted bacteria.

Keywords： green process biohydrometallurgy bioleaching reaction kinetics sulphide ores

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Reinforcement of the two-stage leaching of laterite ores using surfactants

Peiyu Zhang, Hairui Wang, Jingcheng Hao, Jiwei Cui

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3, Pages 562-570 doi: 10.1007/s11705-020-1946-5

Abstract: process, namely, high-pressure acid leaching-atmospheric acid leaching, was used to treat laterite ores

Keywords： laterite ore Ni surfactant acid leaching

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Innovation and practice of the“five grades ganged” engineering management mode

Shao Anlin

Strategic Study of CAE 2013, Volume 15, Issue 11, Pages 44-48

Abstract:

All of Chinese iron ore reserves are lean ores and the resource utilizationestablishment and application of the "five grades ganged" mode,Ansteel Group has solved the lean iron ores

Keywords： engineering philosophy five grades ganged engineering management mode objective optimization lean ores

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Impacts of CO2 and H2S on the risk of hydrate formation during pipeline transport of natural gas

Solomon A. Aromada, Bjørn Kvamme

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3, Pages 616-627 doi: 10.1007/s11705-019-1795-2

Abstract: Evaluation of maximum content of water in natural gas before water condenses out at a given temperature and pressure is the initial step in hydrate risk analysis during pipeline transport of natural gas. The impacts of CO and H S in natural gas on the maximum mole-fractions of water that can be tolerated during pipeline transport without the risk of hydrate nucleation has been studied using our novel thermodynamic scheme. Troll gas from the North Sea is used as a reference case, it contains very negligible amount of CO and no H S. Varying mole-fractions of CO and H S were introduced into the Troll gas, and the effects these inorganic impurities on the water tolerance of the system were evaluated. It is observed that CO does not cause any distinguishable impact on water tolerance of the system, but H S does. Water tolerance decreases with increase in concentration of H S. The impact of ethane on the system was also investigated. The maximum mole-fraction of water permitted in the gas to ensure prevention of hydrate formation also decreases with increase in the concentration of C H like H S. H S has the most impact, it tolerates the least amount of water among the components studied.

Keywords： hydrate hydrogen Sulphide CO₂ dew point pipeline

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Integrated Optimization and Management of Mining Engineering—Coordinative Operation and Optimal Management of Five processes in Mining Engineering

An-lin Shao,Rui-yu Yin

Frontiers of Engineering Management 2014, Volume 1, Issue 2, Pages 153-159 doi: 10.15302/J-FEM-2014023

Abstract: The proportion of lean ores in iron ore resources is 82% in the world and even 97% in China but theirthe application of the “grade decision-based multi-system integration” mode have solved the lean iron ores

Keywords： multi-system integration engineering management objective optimization lean ores exploitation engineering