A patent from a national company won the Zhaoyuan City Invention Patent Award

Recently, the Zhaoyuan Municipal Bureau of Science and Technology issued a list of award-winning projects for invention patents in 2018. Guoda Company's invention patent, "A method for comprehensive recovery and utilization of wet gold mud process tail gas," won the second prize for invention patents in Zhaoyuan City and received a reward of 10,000 yuan. This honor demonstrates the Municipal Bureau of Science and Technology's full affirmation and high recognition of the company's comprehensive strength in the comprehensive recovery of multiple elements from smelting tail gas and technological innovation.


Recently, the Zhaoyuan Municipal Bureau of Science and Technology issued a list of award-winning projects for invention patents in 2018. Guoda Company's invention patent, "A Method for Comprehensive Recycling and Utilization of Waste Gas from Gold Mud Wet Process," won the second prize for invention patents in Zhaoyuan City and received a reward of 10,000 yuan. This honor demonstrates the Zhaoyuan Municipal Bureau of Science and Technology's full affirmation and high recognition of the company's comprehensive strength in the comprehensive recovery of multiple elements from smelting waste gas and technological innovation.
Currently, domestic and international methods for treating waste gas from gold mud wet processes include five methods: limestone-lime method, ammonia absorption, sodium alkali absorption method, double alkali method, and adsorption method. Waste gas from gold mud wet processes usually contains nitrogen oxide waste gas, acidic flue gas, and metal smelting particulate dust. Traditional nitrogen oxide waste gas treatment technology usually uses a two-stage absorption method with sodium hydroxide solution, which only neutralizes the acidic waste gas. The resulting waste gas absorption tower circulating liquid is alkaline and contains gold and silver precious metal elements, as well as non-ferrous metals such as copper, lead, and zinc. These elements are not further recovered, and the alkaline circulating waste liquid is not further recycled.
Guoda Company's invention patent, "A Method for Comprehensive Recycling and Utilization of Waste Gas from Gold Mud Wet Process," belongs to the technical field of waste gas treatment, comprehensive utilization, and recovery of precious gold and silver elements in the wet gold smelting industry. This invention has a simple process flow, starting from the gold mud preparation process, and sequentially performing gold mud acid leaching, waste gas absorption, carbon adsorption, and comprehensive utilization of the post-adsorption liquid. It recovers and utilizes gold and silver in the waste gas from the gold mud wet process, and uses the alkaline circulating waste liquid after gold and silver recovery by activated carbon adsorption directly in the lead flotation enrichment process of cyanide tailings, as the lead selection system liquid, to further recover other elements such as lead. This eliminates the pollution hazard of alkaline circulating waste liquid to the surrounding environment, achieving energy saving, economic benefits, environmental protection, and effective comprehensive governance.
Winning the Zhaoyuan City Invention Patent Award has played a positive role in promoting the rapid development and technological innovation of the company. The company will further accelerate the transformation of intellectual property results and the construction of industrial application projects, seeking new breakthroughs, new leaps, and new development in the company's scientific and technological innovation work.

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