Study on Sumbawa gold recovery using centrifuge

Mineral Processing and Technology International Conference 2017

Ferdana, A.D.^1 ; Petrus, H.T.B.M.^1 ; Bendiyasa, I.M.^1 ; Prijambada, I.D.^2 ; Hamada, F.^3 ; Sachiko, T.^3

Advanced Materials and Sustainable Mineral Processing Research Group, Dept. of Chemical Engineering, Universitas Gadjah Mada, Indonesia^1

Faculty of Agriculture, Universitas Gadjah Mada, Indonesia^2

Department of Regional Studies and Humanities, Faculty of Education and Human Studies Course, Education and Human Studies, Akita University, Japan^3

关键词: Global environment;    Gold concentration;    Gold processing;    Optimum concentration;    Optimum conditions;    Separation equipment;    Several variables;    Water flow rate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/285/1/012027/pdf
DOI  :  10.1088/1757-899X/285/1/012027

来源: IOP

【 摘 要 】

The Artisanal Small Gold Mining in Sumbawa has been processing gold with mercury (Hg), which poses a serious threat to the mining and global environment. One method of gold processing that does not use mercury is by gravity method. Before processing the ore first performed an analysis of Mineragraphy and analysis of compound with XRD. Mineragraphy results show that gold is associated with chalcopyrite and covelite and is a single particle (native) on size 58.8 μm, 117 μm up to 294 μm. characterization with XRD shows that the Sumbawa Gold Ore is composed of quartz, pyrite, pyroxene, and sericite compounds. Sentrifugation is one of separation equipment of gravity method to increase concentrate based on difference of specific gravity. The optimum concentration result is influenced by several variables, such as water flow rate and particle size. In this present research, the range of flow rate is 5 lpm and 10 lpm, the particle size - 100 + 200 mesh and -200 +300 mesh. Gold concentration in concentrate is measured by EDX. The result shows that the optimum condition is obtained at a separation with flow rate 5 lpm and a particle size of -100 + 200 mesh.