Extraction of Copper from Sulfide Copper Concentrate with Hydrochloric Acid Containing Perchloric Acid.

Copper sulfide precipitation by yeasts from Acid mine-waters.

Two strains of Rhodotorula and one of Trichosporon precipitated dissolved copper with H(2)S formed by reducing elemental sulfur with glucose. Iron stimulated this activity under certain conditions. In the case of Rhodotorula strain L, iron stimulated copper precipitation aerobically at a copper concentration of 18 but not 180 mug/ml. Anaerobically, the L strain required iron for precipitation o...

DIRECT REDUCTION OF SARCHESHME COPPER SULFIDE CONCENTRATE WITH CARBON IN THE PRESENCE OF LIME

Abstract: The direct reduction of copper sulfide concentrate from Iranian Sarcheshme deposits with carbon in the presence of lime was investigated in the temperature range of 800-1000 ºC. The reduction kinetics was determined by means of weight loss measurements. It was found that the rate of reaction increased considerably with increasing the temperature. The kinetics was also improved whe...

Extraction of Gold(iii) with Mbimtt from Hydrochloric Acid

Extraction of Alumina from Local Clays by Hydrochloric Acid Process

A bench work study was carried out to investigate the use of kaolinitic clay containing 29.4% Al2O3 extremely abundant in Saudi Arabia for the production of pure alumina by calcination at 700 o C for 1h (recommended by previous investigators) then leached by hydrochloric acid. The effects of leaching temperature (25 o C to boiling temperature), period of activation (10-150 minutes), acid concen...

Extraction of Tin and Copper by Acid Leaching of PCBs

Printed circuit board (PCB) waste is generally dumped as a landfilling or treated pyrometallurg ically, which consumes enormous power, generates hazardous gases and also destroys valuable PCB components. For recycling of the components, they must be separated from the printed circuit boards which is a cumbersome task. For its simplification, the rate of d issolution of solder with acids like Hy...