Most traditional crucible method is used to mine in situ smelting smelting, due to the production process and the different nature of material, of gold from the gold content is different also, directly sell bank due to the high gold or silver not denominated in reason, some mines to improve the quality and economic benefits to the chemical method in smelting again or electrolytic process for separation of mineral flotation gold and silver refining. Jiaojia gold mine in 1984 test USES the new technology of hydrometallurgy, to remove cyanide gold mud by electric chloride * metal (with aqueous chlorination process and ammonia leaching gold 2 silver) with the grade of gold 99.9% finished 99.9% of gold and silver pieces of silver, gold mud of copper, lead and recycling (wet processing gold mud have been promoting trend). Zhaoyuan gold mine has successfully developed a 1.5 x 1.8 m 朴 converter smelting gold mud, replaced the past crucible smelting, reduces the cost, improve the working conditions. This method of xincheng gold mine in shandong province and so on widely application in mines, the effect is better.
Zhaoyuan smelter is research, design and construction by China's first gold smelter, specializes in processing polymetallic sulfide gold concentrates, give priority to in order to extract gold, at the same time, recovery of silver, copper, lead, sulfur, etc., is a comprehensive smelting, chemical industry for the integration of new enterprises. Zhaoyuan smelters were completed and put into operation for gold cil machine China's gold production of smelting technology fills a blank, the roasting, acid leaching - joint (salt leaching) - cyanide leaching process, solves the long production of the contradiction between mining, dressing and smelting, solved the long gold concentrate outbound loss (annual rate of 2% ~ 3%), transport pressure and the comprehensive utilization problems.
The design of the plant production process, absorbing advanced experience at home and abroad, adopts the vacuum belt filter for leaching slag washing filtering equipment, adopting axial cyanide leaching tank three times, three times in the solid-liquid separation and leaching slag washing, advanced technological process.
Nonferrous smeltery of associated gold recovery in gold production, the processing of associated gold polymetallic coltan ore recovery has a quite place. Gold and copper, lead, non-ferrous metals, such as a, was elected to concentrate in smelting copper, lead, gold, silver is recycled. For gold to increase production, some national nonferrous smeltery successively built comprehensive recycling precious metals workshop, by 1985, the country has more than 20, in addition to the shenyang smelting plant, main and zhuzhou, Shanghai, yunnan, chongqing, wuhan, fuchun river and plant of the cathode copper smelters and tianjin, taiyuan, etc. Of zhuzhou smelter Shen Ye, smelting, the three major smelters associated gold production, accounting for more than 90% of the total associated gold production, is Portable gold trommel an important force in the gold production in China. Of associated gold recovery system based on these, the lead in the copper smelting process, the enrichment of gold and silver in the crude copper and crude lead, electrolytic refining crude copper and crude lead, gold and silver deposits in electrolysis anode slime, therefore, gold and silver extracted from anode slime is the main way for recovery of associated gold and silver.