Sumitomo Metal Mining Company, Ltd.

Daishi Ochi

Takeshi Nakamura

Hideki Kikutani

Hideyuki Okamoto

Hiroichi Miyashita

Yuji Aoki

Sachio Ura

Yoshihisa Takahashi

Shigeto Kuroiwa

Smoke exhaust hood for a tilting furnace

The gold concentrate recovery system and a gold concentrate recovery method capable of recovering gold concentrates from gold ores with high efficiency and stability. The system and method include a shaking tableincluding a plurality of rifflesprovided on an upper surface. The rifflesinclude a plurality of first rifflesprovided on the upper surfaceof the shaking table, and at least a second riffledisposed in a flat areawhere the first rifflesare not provided.

Gold concentrate recovery system and gold concentrate recovery method

A water supply launder reducing imbalance of the flow amounts of the ore slurry and the additive water on the upper surface of the shaking table, and producing flow throughout the upper surface of the shaking table. The water supply launder included in a table gravity concentratorto supply water to a tableof the table gravity concentratorincludes a launder bodywhich receives water supplied from a water supply unitto an upper surfaceof the launder body, and supplies the water to the tableof the table gravity concentrator, and a distribution memberwhich is attached to a lower surfaceof the launder body, and contacts water dropping from the upper surfaceof the launder bodyand flowing to the tableof the table gravity concentratorto distribute the water.

Water supply launder of table gravity concentrator

There is provided a method for separating an arsenic mineral from a copper-bearing material containing arsenic, such as a copper ore or a copper concentrate, to obtain a copper concentrate with low arsenic grade. The method for separating an arsenic mineral from a copper-bearing material by flotation includes adding a flotation agent containing a depressant, a frother, and a collector to a slurry composed of a copper-bearing material containing arsenic, and blowing air into the slurry to float a copper concentrate, wherein the depressant is sodium thiosulfate. The sodium thiosulfate is preferably added in an amount of 10 kg or more and 200 kg or less in terms of sodium thiosulfate pentahydrate per ton of copper-bearing material to be subjected to flotation. Further, the oxidation-reduction potential of the slurry to be subjected to flotation, as measured against a silver/silver chloride reference electrode, is preferably &#x2212;10 mV or more and 50 mV or less.

Method for separating arsenic mineral from copper-bearing material with high arsenic grade

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Tokyo, Japan

Daishi Ochi