The Year of Science and Technology in China
As the cornerstone of China's industry and the pillar industry of national economic development, the iron and steel industry has a high degree of relevance and wide extension with its upstream and downstream industries, and the "sensitivity" of the industrial chain is extremely high. Among them, iron ore and energy, as the upstream of the industrial chain, have always limited the upper limit of the development of the steel industry. As a big country in terms of resources, China's iron ore reserves exceed 20 billion tons, ranking fourth in the world, but it has always been faced with problems such as difficult mining, low ore grade, large consumption of coke resources, low conversion rate, and serious environmental pollution, resulting in the overall increase in China's iron ore imports in recent years and the dependence on foreign countries has reached more than 80%, which has become a bottleneck for the safe development of the national economy.
Hydrogen-based mineral phase conversion technology uses hydrogen as the main reducing agent to convert weakly magnetic iron minerals into strong magnetic iron minerals, so as to realize the efficient development and utilization of iron ore resources, the production process is clean, environmentally friendly, and ultra-low emissions of dust, sulfur dioxide and nitrogen oxides are realized. Hydrogen-based mineral phase conversion is a new type of mineral treatment technology, which uses hydrogen as the main reducing agent to convert weak magnetic iron minerals into strong magnetic iron minerals, so as to realize the efficient development and utilization of iron ore resources. The main advantages of this technology are that its production process is clean, environmentally friendly, and the emission of pollutants such as dust and sulfur dioxide is greatly reduced.
In China, hydrogen-based mineral phase conversion technology has been widely researched and applied in some large iron and steel enterprises and scientific research institutions. For example, the 600,000-ton-per-year Energion hydrogen direct reduction plant jointly built by HBIS Group and Castranza-Tenorn, the 300,000-ton-per-year hydrogen-based melt reduction high-purity cast iron project of Jianlong Iron and Steel, and the hydrogen-based direct reduced iron technology of Zhongjin Metallurgical Technology Co., Ltd. used coke oven gas as the gas source to build a gas-based shaft furnace direct reduced iron unit in Zuoquan, Shanxi Province and successfully produced sponge iron.
In addition, the team of Shanghai Fengshi Science and Technology Co., Ltd. and Professor Han Yuexin of Northeastern University proposed a new concept of multi-stage mineral phase conversion of complex refractory iron ore based on hydrogen energy in view of the inherent differences in the phase conversion of refractory hematite, limonite and siderite, invented a new technology for hydrogen-based ore phase conversion, and successfully developed a complete set of equipment for efficient and clean utilization of hydrogen-based ore phase conversion.
The application of hydrogen-based mineral phase conversion technology can not only improve the utilization rate of mineral resources, but also effectively reduce carbon emissions, which is of great significance for achieving China's "double carbon" goal. At the same time, the successful application of this technology also provides a new path to solve the technical problems of refractory iron ore beneficiation in China, which is of great significance to improving the self-sufficiency rate of iron ore in China and increasing China's voice in iron ore. According to **, the application of this technology is expected to revitalize more than 60 billion tons of "sluggish" iron ore resources at home and abroad.
Iron ore hydrogen-based ore phase conversion project and clean energy industry in the same direction, according to the semi-industrial test results for calculation, the annual processing of 2 million tons of iron ore hydrogen-based ore phase conversion project, heating and reduction all use hydrogen, 40,000 standards of hydrogen per hour, 2 hydrogen per year8.8 billion yuan, the promotion of hydrogen-based mineral phase conversion projects can promote the healthy development of regional clean energy, especially the green hydrogen industry. The new technology of hydrogen-based mineral phase conversion has a broad application prospect in the development and utilization of mineral resources, and is of great significance for promoting the efficient, environmentally friendly and low-carbon utilization of mineral resources in China.