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Domestic converter DRI application experience

The HBI imported in the current season is all used in converter production, and the main charge for the Basic Oxygen Furnace (BOF) is molten pig iron from the blast furnace, commonly referred to as "hot metal" (HM). In addition to iron, blast furnace hot metal contains a certain amount of oxidizable elements, such as carbon, silicon, manganese, and phosphorus.

  • 2212-2023

    Winter Solstice

    The winter solstice has both natural and humanistic connotations. It is not only an important solar term among the 24 solar terms, but also a traditional ancestor worship festival among Chinese people. The winter solstice is one of the four seasons and eight festivals, and is regarded as a major festival in winter. In ancient times, there was a saying among the people that "the winter solstice is as important as the new year." Winter Solstice customs vary in content or details depending on the region. In southern China, there is a custom of worshiping ancestors and feasting during the Winter Solstice. In northern China, there is a custom of eating dumplings on the winter solstice every year.

  • 0809-2023

    White Dew

    White Dew, is the 15th solar term in the "Twenty-Four Solar Terms" and the third solar term in autumn. When it comes to White Dew, the summer monsoon is gradually replaced by the winter monsoon. In addition, the point of direct sunlight moves southward, the sunshine time in the northern hemisphere becomes shorter, the light intensity weakens, and the ground radiates heat faster, so the temperature drop speed gradually accelerates, and the temperature difference between day and night gradually widened. White Dew has basically ended the sweltering heat of the summer, the weather is gradually getting cooler, and autumn is beginning to enter in various places.

  • 2402-2023

    Luoyang

    Luoyang (ancient name——Zhen xun, Xi Bo, Luo Yi, Luo Jing, Jing Luo, Shen Du, Luo Cheng) is also called Yi Luo because of the two rivers of Yi and Luo in its territory. Luoyang, in central China's Henan Province, was named in honor of its situation north of the Luohe River–a tributary of the Yellow River. In ancient China, such a location, or one at the southern foot of a mountain, was deemed to be yang (meaning the sunny side as opposed to yin). Luoyang was thus named. It is one of the first national historical and cultural cities announced by the State Council, one of the four ancient capitals of China, and a world cultural city.

  • The Dragon Boat Festival,also called Double Fifth Festival, is celebrated on the fifth day of the fifth moon of the lunar calendar.It is one of the most important Chinese festivals the other two being the Autumn Moon Festival and Chinese New Year.

  • 1305-2020

    Integrity

    Benevolence. righteousness, propriety, wisdom and faith are the 'five constants' in Chinese traditional Confucianism. These 'five constants' run through the development of Chinese ethics and become the most core elements in Chinese value system. There was no paper in the ancient times, all experience skills were from precept. At that time, pure and simple are reliable, so the integrity means the good faith. No matter for human or business, integrity is the foundation, and nothing would be builded up without it.

  • The replacement of the blast furnace—basic oxygen furnace (BF-BOF) steelmaking route with the direct reduced iron—electric arc furnace (DRI-EAF) route reduces the direct CO2 emissions from steelmaking by up to 68%; however, the DRI shaft furnace is one of the largest remaining point source emitters in steelmaking. The capital and operating expenses of two potential nearly carbon-neutral DRI process configurations were investigated as a modification to a standard Midrex DRI facility.

  • Recently, direct reduced iron (DRI) has been highlighted as a promising iron source for electric arc furnace (EAF)-based steelmaking. The two typical production methods for DRI are gas-based reduction and reduction using carbon composite pellets. While the gas-based reduction is strongly dependent on the reliable supply of hydrocarbon fuel, reduction using ore-coal composite pellets has relatively low productivity due to solid–solid reactions.

  • In this paper, the research status of the thermal state, reduction mechanism of iron-bearing burden, coke degradation behavior, and formation of the cohesive zone in various areas of blast furnace after hydrogen-rich smelting is summarized, which can make a more clear and comprehensive understanding for the effect of H2 on blast furnace ironmaking.

  • In the past 20 years, many sintering plants have continued to innovate traditional sinter material preparation technology. Japanese companies such as Sumitomo and Nippon Steel were the first to use vertical intensive mixers for mixing sinter materials. Through research and practice at Sumitomo Wakayama Third Sintering Plant, the use of a vertical powerful mixer instead of a cylindrical mixer has enhanced the mixing effect of the sintered raw materials, and the corresponding granulation effect has also been enhanced, ultimately making the sintered raw materials highly breathable. The sintering speed is increased by 10%~12%, and the coke powder addition ratio can be reduced by 0.5%.

  • Rotary kiln is a commonly used production equipment in modern industrial production. It is widely used in chemical industry, building materials, non-ferrous metallurgy, ferrous metallurgy and other industries, such as: drying and oxidation roasting of materials in the chemical industry; drying of raw materials in the building materials industry and dolomite roasting; oxidative desulfurization of raw materials in the nonferrous industry, synthesis of reagents; drying of ore powder, preparation of smelting flux, production of oxidized pellets, production of direct reduced iron, and smelting of ferronickel in the steel industry.

  • In recent years, with the implementation of a series of new environmental protection policies, higher requirements have been placed on the environmental management methods of foundry companies and the occupational health and safety of employees. The pollution control technology and facilities of foundry enterprises during the production process are still relatively backward. Under such realistic conditions, there is an urgent need for environmentally friendly binders, and phosphate inorganic binders have emerged.

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