In recent years, the mechanized soil compaction is becoming increasingly prominent problem with the rapid increase of agricultural mechanization level. The paper expounded that soil compaction influenced on soil environment including bulk density, hardness, porosity of soil, which resulted in soil structural characteristics change and soil quality degradation, it went against crops production.
11.10 Why Zijinshan copper bioheapleaching plant works ef ficiently at low microbial activity – a study of leaching kinetics of copper sulfide and its implications R.M. Ruan, G. Zou, S.P. Zhong, S.J. Zhao, B. Chan (Zijin Mining Group Co. Ltd, China) and D.Z. Wang (Central South University, China)
The importance of mine planning is often underestimated. Nonetheless, it is essential in achieving high performance by identifying the potential value of mineral resources and providing an optimal, practical, and realistic strategy for extraction, which considers the greatest quantity of options, materials, and scenarios. Conventional mine planning is based on a mostly deterministic approach ...
 Ruan R M,Zou G,Zhong S P,et al. Why Zijinshan copper bioheapleaching plant works efficiently at low microbial activity——study on leaching kinetics of copper sulfides and its implications.Miner Eng,2013,48:36  Wan C F. Discussion on the discharge of waste stone and stack for heap leaching in Dexing Copper Mine.
Low-grade copper ore was collected from the Zijinshan Gold & Copper Mine in Fujian Province, China. Table 1 shows the main chemical composition of the Zijinshan copper ore. Table 2 displays the mineral composition of the Zijinshan copper ore. The copper grade is only 0.23%, and copper mainly exists in the form of secondary copper sulphides (e.g. digenite, covellite, enargite).
the end of 2012 to A$996/oz in 2014 H1 ... Major Construction Program in H2: Zijinshan Luoboling Copper and Molybdenum Mine, Zijinshan Copper Mine's new flotation plant, Ashele Copper Mine deeper exploration program, Nanwenhe Tungsten Mine's technical improvement program,
The Zijinshan gold mine,in Shanghang Country,Fujian Province in China,is famous mainly for its very low cutoff grade adopted in exploitation compared to exploration.This research aims at dynamical expressing both the geological structure and properties of the gold mine and its underlying copper mine,under different conditions of deposit industry index mainly consists of grade parameters ...
Why Zijinshan copper bioheapleaching plant works efficiently at low microbial activity—Study on leaching kinetics of copper sulfides and its implications. Miner. Eng. 2013, 48, 36–43. [Google Scholar] Liu, X.Y.; Chen, B.W.; Wen, J.K. Dominance of Acidithiobacillus at ore surface of Zijinshan commercial low-grade copper bioleaching heap.
Why Zijinshan copper bioheapleaching plant works efficiently at low microbial activity - a study of leaching kinetics of copper sulfide and its implications R.M. Ruan, G. Zou, S.P. Zhong, S.J. Zhao, B. Chan (Zijin Mining Group Co. Ltd, China) and D.Z. Wang (Central South University, China)
Biohydrometallurgy 2012 (Biohydrometallurgy '12) Falmouth, United Kingdom 18-20 June 2012. Printed from e-media with permission by: ... 11.10 Why Zijinshan copper bioheapleaching plant works efficiently at low microbial activity – a study of leaching kinetics of copper sulfide and its implications 30
X.Y. Liu, B.W. Chen, J.K. Wen, and R.M. Ruan, Leptospirillum forms a minor portion of the population in Zijinshan commercial non-aeration copper bioleaching heap identified by 16S rRNA clone libraries and real-time PCR, Hydrometallurgy, 104(2010), No. 3-4, p. 399. CrossRef Google Scholar
Zijinshan commercial bioheapleaching–SX–EW plant has been in operation since December 2005. 13.9 million tonnes of low grade copper sulfide ore (Cu 0.38%) has been leached efficiently with an annual recovery of 80% in this distinct leaching system with high iron concentration, high temperature, high acidity and low microbial activity.
Molecular approaches to studying the microbiology of copper bioleach heaps have greatly increased our knowledge of the microbial diversity in these environments. Nevertheless, technical and operational challenges exist that prevent obtaining samples from commercial-scale heaps necessary to improve our understanding of the temporal changes that occur during heap maturation and the progression ...
Abstract. For the low-grade copper sulfide ores with 0.99% of copper, of which 41.5% was primary copper sulfide, and 54.5% was secondary copper sulfide, well-controlled column bioleaching on a novel equipment was carried out to investigate the optimal conditions of pre-leaching, particle sizes of ores, temperature, spray intensity and strain consortium.
In this paper, the effect of nitric oxide (NO) on the secondary metabolites of Taxus chinensis var. mairei under elevated UV-B radiation was studied. The 5-year-old seedlings were used as test materials. The sodium nitroprusside (SNP) was as the NO donor and Carboxy-PTIO potassium salt (cPTIO) as the NO scavenger. The results showed that the SNP, UV, UV-B+SNP treatments significantly increased ...
Metallurgical sludges – Bio/leaching and heavy metals recovery (Zn & Cu) To be defended December 11nd, 2015 In front of the PhD committee Prof. Cécile Quantin Reviewer Prof. Gabriel Billon Reviewer Dr. Eric van Hullebusch Promotor Prof. Dr. Ir. Piet Lens Co-promotor Dr. Giovanni Esposito Co-promotor
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