Publication Date:
2019-10-21
Description:
The XRF, XRD, polarizing microscopy and SEM-EDS were used to study the alteration mechanism of copper-bearing biotite and the leachable property of copper-bearing minerals in Mulyashy Copper Mine, Zambia. It was found that biotite can be divided into copper-bearing biotite and copper-free biotite. Some copper-bearing biotite existed in the form of monomer, and others aggregated with copper-bearing chlorite, malachite or copper-bearing limonite. The main reason for the occurrence of biotite aggregations was that copper-bearing biotite underwent two kinds of alteration mechanisms as follows: altering into copper-bearing chlorite and malachite, and altering into copper-bearing chlorite and copper-bearing limonite. The order of factors effecting the copper leaching rate of the ores in acid leaching experiments was temperature 〉 sample size 〉 H2SO4 concentration 〉 leaching time 〉 stirring speed. In addition, the copper leaching rate of copper-bearing minerals at different temperatures was in the following order: malachite, chrysocolla and pseudomalachite 〉 copper-bearing chlorite 〉 copper-bearing muscovite 〉 copper-bearing biotite 〉 copper-bearing limonite. The leachable property of biotite is closely related to its special structure.
Electronic ISSN:
2045-2322
Topics:
Natural Sciences in General
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