leaching zinc mining

  • Bacterial leaching of zinc and copper from mining wastes ...

    Bacterial leaching of zinc from chat (chert) pile rock and copper from tailings pond sediment was studied in shake flask experiments. Thiobacillus ferrooxidans at 26°C leached 38% of zinc from pulverized rock in 15 days and extracted copper completely from native sediment in 24 h. Experiments omitting single medium constituents for the bacterial leaching of both zinc and copper indicated that ...

  • EP1325164B1 - Pressure leaching process for zinc recovery ...

    The zinc solution is subjected to zinc solvent extraction to produce a raffinate and a pregnant zinc solution. A method of removing ion from an iron bearing raffinate is also provided which comprises pressure leaching a zinc sulphate ore with the iron bearing raffinate to produce a solid leach residue containing iron and a zinc solution.

  • Leaching (metallurgy) - Wikipedia

    Leaching (metallurgy) Leaching is a process where ore is soluble and impurities are insoluble, widely used extractive metallurgy technique which converts metals into soluble salts in aqueous media. Compared to pyrometallurgical operations, leaching is easier to perform and much less harmful, because no gaseous pollution occurs.

  • Getting more out of copper, zinc and gold resources ...

    In the FL ROL process, a simple way has been found to leach copper sulphide concentrates, with chalcopyrite as the predominant copper-bearing mineral, at 85 to 95°C and under atmospheric pressure.

  • Bioleaching of zinc from gold ores using Acidithiobacillus ...

    The present work investigated microbial leaching of zinc from ore using Acidithiobacillus ferrooxidans (ATCC 14859). The ore samples, consisted of 13wt% zinc, were obtained from a gold mine in north-eastern Thailand.

  • Leaching (metallurgy) - Wikipedia

    Leaching is a process widely used in extractive metallurgy where ore is treated with chemicals to convert the valuable metals within into soluble salts. These can then be washed out and processed to give the pure metal; the material left over is commonly referred to as tailings .

  • Bacterial leaching of zinc and copper from mining wastes ...

    Bacterial leaching of zinc from chat (chert) pile rock and copper from tailings pond sediment was studied in shake flask experiments. Thiobacillus ferrooxidans at 26°C leached 38% of zinc from pulverized rock in 15 days and extracted copper completely from native sediment in 24 h. Experiments omitting single medium constituents for the bacterial leaching of both zinc and copper indicated that the primary mechanism of bacterial leaching .