نتایج جستجو برای: copper ore
تعداد نتایج: 92137 فیلتر نتایج به سال:
IVANOVA, E., T. STAYKOVA and I. VELCHEVA, 2008. Cytotoxicity and genotoxicity of heavy metal and cyanide-contaminated waters in some regions for production and processing of ore in Bulgaria. Bulg. J. Agric. Sci., 14: 262-268 This study generalizes the data of investigations on cytotoxic and genotoxic effect of heavy metaland cyanide-contaminated waters in 2001, 2003 and 2005. The water samples ...
Bioleaching has been employed commercially to recover metals from low grade ores, but the production efficiency remains to be improved due to limited understanding of the system. This study examined the shift of microbial communities and S&Fe cycling in three subsystems within a copper ore bioleaching system: leaching heap (LH), leaching solution (LS) and sediment under LS. Results showed that ...
Consideration of the mining method is an essential component of ore reserves evaluation. This is particularly true where the profitability of a project is conditioned by the ability to mine selectively. Linear estimation methods such as Ordinary and Simple Kriging commonly fail to provide unbiased estimates of recovered ore tonnage and metal content which means that a mining project can be expo...
The article provides a brief overview of the problems copper production in Kazakhstan. It is shown that main current problem copper-smelting involvement low-grade ores complex mineral composition. Existing technologies are focused on processing ore with higher content, accordingly, it necessary to adjust existing enrichment and smelting technologies. To determine composition some samples promis...
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