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

Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI

《化学科学与工程前沿（英文）》 2009年第3卷第3期页码 250-254 doi: 10.1007/s11705-009-0049-0

摘要： This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted bacteria. In order to accelerate the bioleaching rate, the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory scale. The overall acid consumption was 4.3 kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper dissolution. The calculated copper dissolution rates obey the Shrinking Core Model. The relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58 kJ/mol.

关键词： 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

《化学科学与工程前沿（英文）》 2021年第15卷第3期页码 562-570 doi: 10.1007/s11705-020-1946-5

摘要： A two-stage leaching process, namely, high-pressure acid leaching-atmospheric acid leaching, was used to treat laterite ores under mild conditions. The leaching ratio of Ni was low because of adsorption and incomplete leaching. In this work, surfactants were used as additives to boost the leaching ratio of Ni. The effect of surfactant type (cationic, anionic, and nonionic surfactants) on the leaching ratio of Ni was investigated. Leaching results showed that stearyl trimethyl ammonium chloride (STAC) apparently increased the leaching ratios of valuable metals. The variation in the physicochemical properties of the lixiviant and the residue improved the leaching ratio of Ni in the presence of STAC. Kinetics analysis indicated that the leaching process was controlled by chemical reaction.

关键词： laterite ore Ni surfactant acid leaching

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“五品联动”工程管理模式的创新与实践

邵安林

《中国工程科学》 2013年第15卷第11期页码 44-48

摘要：

我国铁矿资源储量总体上都是贫矿，资源利用水平低。鞍钢集团矿业公司（鞍钢矿业）在工程哲学指导下，在现有技术集成和创新的基础上，创建了“五品联动”工程管理模式。将包含地质工程、采矿工程、配矿工程、选矿工程、冶炼工程在内的矿冶工程看作一个整体，统筹考虑地质品位、采矿品位、入选品位、精矿品位和入炉品位5 种品位，以矿冶工程的总成本为目标，集成优化。“五品联动”模式的提出和应用，解决了贫铁矿利用难题，为实施“自给为主”的资源战略提供了支撑。

关键词：工程哲学五品联动工程管理模式目标优化贫矿开发

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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

《化学科学与工程前沿（英文）》 2019年第13卷第3期页码 616-627 doi: 10.1007/s11705-019-1795-2

摘要： 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.

关键词： 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

《工程管理前沿（英文）》 2014年第1卷第2期页码 153-159 doi: 10.15302/J-FEM-2014023

摘要： In the view of engineering philosophy, the mining engineering is a dynamic operating process of ferrous material flow, in which the ferrous material flow is processed orderly through a series of continual coordinated procedures. It is also a process of discarding the dross, selecting the essential, and extracting the original metal. The object of management is to fulfill the multi-objective optimization. The proportion of lean ores in iron ore resources is 82% in the world and even 97% in China but their utilization is very low. Aiming at the bottleneck and weakness of China’s resource development, this paper analyzes and plans the mining engineering system as a whole based on the ideas and methods of system theory and engineering philosophical thinking. And the paper proposes the “grade decision-based multi-system integration” engineering management mode, which considers the relationship between engineering and environment and complies with the natural law. In the mode, the mining engineering, including geologic mining, ore blending, concentration and pelleting, can be viewed as a whole and the geological grade, mined ore grade, feed grade, concentrate grade and feed grade of blast furnace can be considered comprehensively. The mode reflected the overall structural optimization idea, realized the analysis, coordination and optimization among the multiple functions and processes, and thus drove the overall efficient and profit optimization throughout the processing flow. The establishment and the application of the “grade decision-based multi-system integration” mode have solved the lean iron ores exploitation problem and supported the “self-sufficiency” resource strategy.

关键词： multi-system integration engineering management objective optimization lean ores exploitation engineering philosophy mode