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Recently, Luoyang City issued the "Implementation Plan for Constructing a Modern Industrial System and Promoting the Development of the New Materials Industry." Luoyang City will give full play to its resource advantages, industrial foundation advantages, and scientific research and innovation advantages, focusing on breakthroughs in key core technologies, cultivating competitive products, and promoting the high-end and clustered development of the new materials industry, making Luoyang a national high-tech industrial base for new materials with distinct industrial characteristics, a good development environment, a complete industrial chain and supporting facilities, and strong comprehensive competitiveness. Forming 4 to 5 industrial clusters exceeding 10 billion yuan. Luoyang's materials industry has a strong foundation. Starting from the launch of China's first artificial earth satellite, Dongfanghong 1, in 1970...
The State Council recently issued the "Guiding Opinions on Promoting Steady Growth, Structural Adjustment, and Efficiency Improvement in the Building Materials Industry", which makes specific arrangements for resolving overcapacity in the cement and flat glass industries in the coming period, accelerating the transformation and upgrading of the building materials industry, and promoting cost reduction and efficiency improvement for building materials enterprises to achieve development out of difficulties. The "Opinions" propose that in order to reduce costs and increase efficiency, the building materials industry should implement green and intelligent development, one of which is to promote chromium-free refractory materials. In the cement kiln burning zone, magnesia-chromium bricks are commonly used as lining materials, but under high temperature, alkaline, and oxidizing atmospheres, Cr3+ in magnesia-chromium bricks will be converted into water-soluble Cr6+, and Cr6+ is strongly harmful
Safety assurance of steel ladle vent bricks
Permeable bricks are crucial functional refractory materials used in the bottom-blown argon process of steel ladles and are among the materials that may cause ladle steel leakage accidents. The quality stability of permeable bricks or permeable seat bricks, standardized construction practices, and improvements in brick design can relatively improve the safety of permeable bricks to prevent steel leakage. The use conditions of permeable bricks require them to have good high-temperature performance and thermal shock resistance to ensure their permeability and service life. Steel ladle permeable bricks usually use plate-shaped corundum as the main raw material, with the addition of aluminum magnesium spinel, active alumina fine powder, binder, and an appropriate amount of additives, and will also add
The performance of anti-seepage aerated bricks
炉外精炼工艺如今是炼钢流程的重要组成部分，钢包底吹氩工序是又实现炉外精炼不可少的，而钢包透气砖则是实现这一工艺的关键元件。目前的透气砖主要有狭缝、防渗型两种，透气砖的性能关乎着钢铁的质量和产量，一般来说，透气砖在寿命、底吹效果、吹扫力度和安全度上都应当契合炼钢厂家生产的日常周转。 （图）防渗透气砖在使用寿命、底吹效果和安全可靠性上，防渗透气砖与狭缝型透气砖相比，防渗透气砖有着透气性能稳定的优势，可
Main components of refractory materials such as permeable bricks, water-mouth bricks, and castables
Refractory materials are used in various industrial sectors including metallurgy, chemical processes, petrochemicals, mechanical manufacturing, and power processing, with a significant portion used in the metallurgical industry. In steelmaking, common refractory materials used in converters and refining furnaces include permeable bricks, water-cooled bricks, electric furnace covers, castables, runner brick, and magnesia-carbon bricks. These refractory materials differ significantly in their main and additive components. From a chemical perspective, refractory materials are composed of minerals such as corundum, mullite, and magnesia, with main components including alumina and magnesia. (Figure) Corundum is a major component of refractory materials, forming the refractory...
Four main reasons for damage to steel ladle breathable bricks
During the use of porous bricks in steel plants, the main reasons for damage to the porous bricks are thermal stress, mechanical stress, mechanical wear, and chemical corrosion. Porous bricks consist of two parts: a porous core and a porous seat brick. When bottom blowing gas is used, the working surface of the porous core will directly contact the high-temperature molten steel. The bottom blowing gas is a cold air stream, forming a large temperature difference with the high-temperature molten steel. As the number of uses increases, due to the rapid cooling and heating, the erosion of the porous brick core becomes deeper, and cracks are easily produced. The working surface of the bottom porous brick is in direct contact with the high-temperature molten steel, while the temperature of the non-working surface is relatively low.
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