China may exhaust ore from existing gold mines in six years[12-21-2007]
Although China is poised to overtake the U.S. as the second-biggest gold producer this year - and perhaps South Africa as the largest - Zijin Mining Group Co. says existing mines will run out of ore in six years.
Rising economic growth in China has led Zijin Mining, Zhongji......
Murchison iron ore reserves up 58pc[12-21-2007]
Murchison Metals (ASX:MMX) reports a significant increase in the JORC compliant Mineral Resources at Jack Hills to 153 million tonnes, an increase of 58% over the prior reported figure of 97 million tonnes.
The Jack Hills Mineral Resource now comprises:
69.6 million ton......
Bioleaching of lateritic nickel ore by ultrasound[4-23-2009]
The bioleaching of nickel from lateritic ore of Orissa, India, using a nativeAspergillus niger strain was studied with and without ultrasound. Different parameters, such as spore concentration, amount of dextrose in the medium, pulp densities, and sonication time, were stu......
Leaching Behaviour of Sukinda Lateritic Nickel Ore With Sulphuric Acid[4-23-2009]
Because of the comparatively large deposits, the nickel laterites of Sukinda, Orissa, India, have been investigated by many workers with the aim of developing suitable extraction techniques. Chander and Sharma (1981) studied the extractability of Ni from lateritic nickel ore by r......
Microbial leaching of lateritic nickel ore[4-23-2009]
Lateritic nickel ore from the Sukinda Mines, Orissa, India, was leached using Thiobacillus ferrooxidans, Bacillus circulans, Bacillus licheniformis and Aspergillus niger at 5% (w/v) solid: liquid ratio for 5¨C20 days. Maximum leaching of Ni was achieved with B. circulans (85%) and......
