Gold concentrate cyanide gold extraction technology features

Gold cyanide extraction technology is the modern major gold-producing means, China was in the early 20th century had to extract gold Using this method, first built in 1901 2t / d pilot plant in Shandong Weihai Fan cyanide home port, after 1932 In Zhaoyuan and Weinan, Shandong, in 1936, the dialysis and stirring cyanide technology were tested in Jinguashi, Taiwan. In 1966, the Linglong Gold Mine in Shandong Province was built into a gold-smelting machine for continuous mixing of cyanide gold-plating plants. In 1970, it was applied in Jinchang, Hebei, and in 1977 in Liaoning Wulong Gold Mine. The cyanide carbon slurry gold extraction technology was successfully researched in the early 1980s, and the Changchun Gold Research Institute established 50t/ of China's intellectual property rights in two gold mines in Chiweigou, Jilin Province, in Linghu, Jilin Province and Jilin Metallurgical Research Institute. d Production scale of carbon slurry plant, and then introduced technology and equipment from abroad in the mid-1980s in Shaoguan, Shaanxi, Zhangjiakou, Hebei, built a full mud cyanide carbon pulp plant, China's cyanide gold extraction technology has been a long-term development, a variety of processes Diversified, the technology is improving day by day, the indicators are gradually improved, and the application is more extensive. In the 1990s, a resin slurry gold extraction plant was built in Xinjiang Axi and other gold mines. Cyanide gold extraction technology has become the main force of China's gold industry production. Since the gold concentrate cyanide process has been successfully tested in the 1960s, it has been used in many gold mines, especially in Shandong, Hebei, Henan, Liaoning, and Jilin. The main feature of the process is that after the gold ore is enriched by flotation, the gold content of the concentrate is high, the amount of gold entering the cyanide operation is small, the consumption of cyanide is low, and the acidification method has a good effect on the treatment of cyanide-containing wastewater, and environmental pollution. Small, can save infrastructure investment, small footprint, reduce production costs, and can achieve real estate gold.

Gold concentrate cyanide gold extraction process For the primary minerals with relatively simple mineral composition, the general flotation recovery rate is high, usually between 93% and 98%, and the cyanidation recovery rate is about 95%. Therefore, flotation - - The total recovery of cyanidation is 88% to 94%, which is equivalent to the whole mud cyanidation technology.

However, in terms of total mud cyanidation, concentrate cyanide has less capital investment, less cyanide-containing wastewater, and lower production costs. This is the main reason why this process is widely used.

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Item

Unit

Index

Test condition

Thickness tolerance

%

≤3

GB/T6682-2001

Transmittance

%

≥75

GB/T 2410-2008

Tensile strength

MD

Mpa

≥170

GB/T 1040.3

TD

Mpa

≥170

Elongation at

Break

MD

%

≥90

GB/T 1040.3

TD

≥90

Heat shrinkage (150℃30min)

MD

%

≤1.4

GB/T 16958-2008

TD

≤0.2

Haze

%

1.7

GB/T 2410-2008

Electricity intensity

75um

V/um

≥105

GB/T 12802.2-2004



polyester film thickness


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