Jinwang Bismuth Industry strives to create a new model of circular economy

This newspaper reported that in more than 10 years of leap-forward development, Hunan Jinwang Bismuth Industry Co., Ltd. in Chenzhou High-tech Zone has independently innovated and developed scientifically, forming an integrated smelting, The integrated business model of intensive processing, resource recycling and comprehensive utilization realizes material circulation between various processes within the company, extends the industrial chain, completely and fully utilizes renewable resources, and creates a unique Jinwang Bismuth Industry Circular economy model.
For a long time, the company has focused on the construction of an innovation system at the level of independent research and development and achievement transformation and application. It has made full use of social scientific and technological resources and given full play to the advantages of the industrial chain. It has built a number of influential scientific and technological innovation projects and has developed an industry-university-research relationship. A combined innovation path. Especially in recent years, the supply of raw materials such as copper and lead has become increasingly tight, and the fact that imports have increased significantly shows that the contradiction between resource demand and resource constraints has become increasingly acute. In addition, the imported raw materials are complex in composition, with many types and high contents of valuable elements. Various smelting companies produce a large amount of various slags, which are also rich in valuable metals. Since they are not effectively recycled, a large amount of slags are left idle. Accumulation has a great impact on environmental protection and has become a bottleneck restricting the development of enterprises.
In this context, the company assessed the situation, adjusted its strategic layout in a timely manner, and actively followed the path of circular economy development. Through the resource recycling of non-ferrous metal enterprise waste, we can realize the cycle between production and consumption, maximize the efficient use of resources, reduce the generation of pollutants, and avoid the impact of secondary materials such as waste residues on the environment.
The company has invested heavily in continuously increasing scientific and technological innovation, vigorously developing the world’s most advanced oxygen-rich molten pool smelting technology, technologically upgrading the industry, and actively eliminating outdated equipment and processes. In the fierce market competition, technological innovation and management innovation are regarded as the driving force for enterprise development. In 2012, the Xianxi General Plant was built, pioneering the world’s leading oxygen-enriched double-side-blown molten pool smelting process, realizing oxygen-enriched and efficient smelting of bismuth, and using tail gas to produce sulfuric acid. In the lead electrolysis process, a process system for producing No. 1 electric lead from high-bismuth crude lead was realized. In particular, in the lead anode mud smelting process, a selective reduction smelting process was pioneered and a high-quality bismuth-silver alloy was produced, which has served the world The largest bismuth fluorosilicic acid electrolysis provides high-quality raw materials and ensures its stable operation. At the same time, this technology can be widely used in metallurgical fields such as silver that require reduction-oxidation refining.
In 2015, a comprehensive utilization project of lead-bismuth-copper-silver polymetallic smelting waste slag resources was built, using the company’s independently owned oxygen-enriched enhanced smelting technology to efficiently separate and recover bismuth, silver, lead, tin, antimony, etc. in the production waste slag. Tellurium and other elements not only ensure that the slag is completely drained, but also turn waste into treasure. The project has complete supporting facilities and a high degree of automation. It is equipped with a series of environmentally friendly treatment systems such as automatic batching, waste heat power generation, and exhaust gas treatment, which ensures the project’s low energy consumption, high efficiency, and cleanliness. The process waste gas is cooled and dusted through the waste heat boiler and then bagged for dust removal. Then, the three-stage alkaline countercurrent absorption + electric defogging process is used to make the discharged waste gas much better than the national standard. The wastewater is used as a copper water jacket to circulate and cool the slag flushing tank, and the absorption tower is regenerated and recycled. The waste slag is mainly water-quenched slag after high-temperature smelting, which has stable chemical composition and is returned to be used as ingredients. This technology promotes the development of the industry in the direction of oxygen-rich, efficient smelting and environmental protection.
The pyrometallurgical smelting of non-ferrous metals generally produces secondary slag. The annual output of secondary slag from the pyrometallurgical smelting of non-ferrous metals in my country is more than 10 million tons. If historical stockpiles are taken into account, the amount of slag will be even larger. Reaching hundreds of millions of tons. This not only results in the loss of important metal resources, but the accumulation of large amounts of smelting slag also poses a threat to the environment. Jinwang Bismuth Industry Company’s comprehensive utilization project of lead-bismuth-copper-silver multi-metal smelting waste slag resources has oxygen-enriched intensified smelting technology, which can remove slag materials from the production processes of various smelting enterprises, such as lead-antimony slag, early-stage slag, late-stage slag, and soot. , wet lead mud, etc. can be recycled using an oxygen-rich side-blown reduction furnace to form a circular economy, which not only recovers resources but also solves environmental pollution problems. With the increasing shortage of basic resources, the country vigorously advocates the comprehensive utilization of resources and circular economy. Today is of profound significance.
At present, while the company is doing a good job in recycling internal resources, it is also setting its sights on domestic and overseas markets.In the international secondary slag recycling market, the lead-bismuth-copper-silver polymetal smelting waste slag of related enterprises is used as the company’s processing raw materials and resources to establish an industrial ecological park of circular economy, realize the recycling of social resources, and contribute to our country’s environment. Make new contributions to conservation.
　（Ou Yongsheng）