Anti-oxidation method for sulfide minerals in sulfide ore

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 1/16 (2006.01) C22B 1/00 (2006.01) C22B 3/00 (2006.01) C22B 3/18 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2512655

A method for suppressing the oxidation of sulfide minerals in a sulfide ore, which comprises adding an antioxidant containing an organic acid having a carboxyl group as a primary component and also containing a vegetable polyphenol to the sulfide ore accumulated in a stock pile or an accumulation spot for waste stones. The method allows the suppression of the oxidation of sulfide minerals in a sulfide ore by bacteria or the like, which results in the prevention of the elution of a heavy metal component from the sulfide ore, and in the alleviation of the reduction in the performance of the ore dressing by floatation in the treatment of the sulfide ore accumulated in a stock pile, and further, in an easier treatment of an acidic waste from a stock pile or an accumulation spot for waste stones.

La présente invention concerne un procédé permettant de supprimer l'oxydation de minéraux sulfurés dans un minerai sulfuré, qui consiste à ajouter un antioxydant contenant un acide organique ayant un groupe carboxyle en tant que composant primaire et contenant également un polyphénol végétal, au minerai sulfuré stocké sous forme de pile d'accumulation ou en un point d'accumulation pour déchets de pierres. Ce procédé permet la suppression de l'oxydation des minéraux sulfurés dans un minerai sulfuré par des bactéries ou analogues, ce qui permet premièrement d'empêcher l'élution d'un composant métallique lourd du minerai sulfuré, deuxièmement de limiter la réduction des performances de la préparation mécanique du minerai par flottation lors du traitement du minerai sulfuré stocké dans la pile d'accumulation, et troisièmement de faciliter le traitement d'un déchet acide à partir d'une pile de stockage ou d'un point d'accumulation pour déchets de pierres.

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