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A. Comparison of investment in gold refining equipment:
Chlorination method: The above three domestic refineries using chlorination method, all introduced the technology and key equipment from Sweden Bolidon Company. The investment is huge, the total investment is about 30 million, and the design scale is about 100 tons per year.
Aqua regia - extraction method: At present, only the gold refineries of Zijin Group and Guangdong Hetai are more mature. The production scale is 100 kg/day, and the total investment in equipment is about 6 million yuan.
Electrolysis method: production scale of 100 kg / day, total investment in equipment is about 4 million yuan.
Second, product quality and technical control difficulties: At present, the above three processes can achieve stable quality assurance. In terms of technical difficulty of quality control, the chlorination and aqua regia-extraction methods require higher technical level of operators. It is necessary to have a group of relatively skilled and competent technical backbone. Electrolysis method for the operator requirements are relatively simple, the general staff can be trained to operate after a short period of time.
Comparison of production costs: The production costs mentioned here include: water, electricity, fuel, chemicals, materials and other consumption, and the wages of all employees.
Chlorination method: 0.20 yuan/gram for Zhongyuan Gold Smelter of Zhongjin Group.
Aqua regia-extraction method: RMB 0.30/g for Zijin Group Gold Smelter.
Electrolysis method: RMB 0.04/g for the refinery of Lingbao Gold Co.
Translated with www.DeepL.com/Translator (free version)
