湿式製錬工程における微生物的鉄酸化法に及ぼす各種イオンの影響

概要

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Flue dust produced from Kosaka copper flash smelting furnace contains metals such as Cu, Pb, Zn, Fe, As, Cd etc. To recover these metals, the dust is treated in the hydrometallurgical plant. Previous iron oxidation by air blowing at pH5 and 50°C to remove iron from the leached solution has been changed by becterial iron oxidation and precipitaion process. Fundamental experiments carried out prior to the change showed that solution from copper removal process depressed ability of iron oxidizing bacteria. The solution contained heavy metal ions and halogen ions (F, Cl, Br) originated from the waste water of sulfuric acid producing plant. The effects of these ions on bacteria iron oxidation were tested. The main inhibitor in this solution was found to be fluoride ions. Resistant bacteria for fluoride were not found, but their adaptation to fluoride was effective to oxidize iron in solution containing fluoride.
社団法人資源・素材学会の論文