论文信息 - The application of direct smelting of gold concentrates as an alternative to mercury amalgamation in small-scale gold mining operations in Ghana

The application of direct smelting of gold concentrates as an alternative to mercury amalgamation in small-scale gold mining operations in Ghana

Mercury is used in small-scale mining to amalgamate gold particles, facilitating their separation from heavy sands. The negative environmental/health-related effects of mercury in mining communities in Ghana and other countries have generated research interest into development of safer alternatives. This study tested direct smelting as an alternative to amalgamation. In laboratory investigations, direct smelting yielded 99.8% recovery against 97% for amalgamation. A locally-fabricated furnace, sika bukyia, was used in field tests, yielding an average recovery of 98.3% compared to 88% for amalgamation. Direct smelting has the potential to replace amalgamation and retorting because it is effective, easy, quick and transparent.

Michael Styles | S. Al-Hassan | R. S. Nartey | R. K. Amankwah

[1] Y. Marignac,et al. Note , 1951, Neurochemistry International.

[2] Kamini Singha,et al. Contaminated Identities: Mercury and Marginalization in Ghana's Artisanal Mining Sector , 2007 .

[3] Gavin Hilson,et al. Alternatives to cyanide in the gold mining industry: what prospects for the future? , 2006 .

[4] G Drasch,et al. The Mt. Diwata study on the Philippines 1999--assessing mercury intoxication of the population by small scale gold mining. , 2001, The Science of the total environment.

[5] Gavin Hilson,et al. Improving awareness of mercury pollution in small-scale gold mining communities: challenges and ways forward in rural Ghana. , 2007, Environmental research.

[6] J. D. Appleton,et al. Mercury contamination associated with artisanal gold mining on the island of Mindanao, the Philippines. , 1999, The Science of the total environment.

[7] Marc Babut,et al. Improving the environmental management of small-scale gold mining in Ghana: a case study of Dumasi , 2003 .

[8] Michael Styles,et al. The identification and testing of a method for mercury-free gold processing for artisanal and small-scale gold miners in Ghana , 2010 .

[9] B. Nyarko,et al. The impact of small-scale mining activities on the levels of mercury in the environment: The case of Prestea and its environs , 2004 .