Three different types of coal were taken for microbial desulphurisation experiments using isolated cultures of Thiobacillus ferrooxidans. The samples were milled and then sieved. The effect of various parameters on microbial ...

Jigging of the -2.8 +0.7-mm size fraction of a friable, low-grade manganese ore sample from Andhra Pradesh increased the Mn content of a concentrate by 7% to 8%, with nit average recovery of 57%. The jig concentrate was ...

Chromitiferous overburden containing nickel in oxide form is reduced with CO-CO2-N-2 gas mixtures. This converts the nickel oxide to metallic nickel and restricts the iron oxide to the magnetite state to extract the nickel. ...

Bismuth based pigments are environmentally friendly and can replace more hazardous yellow formulations Containing lead, chromium or cadmium pigments. They offer brilliant greenish yellow and orange shades with high opacity ...

Galvanic interaction between manganese dioxide and sulfide mineral (FeS2, CuFeS2, ZnS and PbS) galvanic couples were investigated through polarization measurements and leaching studies. The sulfide minerals, being less ...