In the production of gold, polymetallic ores associated gold recovery occupied a certain position.
Gold and copper, lead and other non-ferrous metal concentrates in an elected, copper, lead smelting, gold, silver recovered. In order to increase production of gold, some non-ferrous smelters in the country have built precious metal comprehensive recycling workshops. By 1985, there were more than 20 in the country. Apart from Shenyang smelters, there are mainly Zhuzhou, Shanghai, Yunnan, Chongqing, Wuhan and Fuchunjiang. Such as smelting plants and Tianjin, Taiyuan electrolytic copper plant. Among them, the production of companion gold in the three major smelters of Shenye, Shangye and Zhuye accounts for more than 90% of the total output of the national associated gold, which is an important force in China's gold production. The recovery of associated gold in these enterprises is based on the fact that in the process of copper and lead smelting, gold and silver are concentrated in blister copper and crude lead. When electrolytically refining blister copper and crude lead, gold and silver are deposited in the electrolytic anode mud, so it is extracted from the anode mud. Gold and silver are the main ways to recover associated gold and silver.
The treatment process of copper anode mud has been developed rapidly. Through continuous reform and innovation, the traditional fire process is more mature and perfect. The semi-wet process and the whole process are successfully tested and put into production. To make China's smelting technology and equipment level have been greatly improved. Such as the improvement of the fire removal process, the comprehensive recovery of valuable elements, the improvement of the furnace body and the improvement of the vacuum system. There are also the transformation of electrolytic cells, the promotion and application of intermediate frequency furnaces, etc., which have gradually matured and improved the fire smelting process, and improved the technical and economic indicators. Because the fire smelting process has stable technical conditions, mature technology, high comprehensive utilization, strong adaptability to raw materials, large processing capacity, low cost and so on, it is still a smelting plant such as Shenye, Zhuye and Shangye. A universally applied method. Fuchunjiang Smelter, Wuhan Smelter and Chongqing Smelter have achieved remarkable results with the new wet process.
Yunnan Smelter and Tianjin Electrolytic Copper Plant have achieved success and put into production through the joint process of metallurgy and smelting, and have also achieved significant economic benefits. The successful test and application of the sulfuric ACID slag gold extraction process has also created a new way for China's gold production and full utilization of resources.
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