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Current status of China's refractory industry
Release time:
2020-06-11
China's refractory raw material resources are responsible for dual consumption at home and abroad. The current consumption rate has exceeded the tolerance limit of these non-renewable resources. The high-quality bauxite, high-quality graphite and high-quality magnesium ore resources have already shown tensions, which poses potential for the sustainable development of refractory materials and high-temperature industries. Threat. Despite the development of low-grade ore comprehensive utilization technology, a series of high aluminum homogenizers with uniform structure and excellent performance have formed a certain production scale, but the scientific application of refractory materials, comprehensive utilization of resources and the development of new refractory raw material systems are still related to refractory The urgent task of sustainable development of the material industry.
Refractory materials are used in high-temperature processes in the fields of iron and steel, nonferrous metals, building materials, chemicals, power, environmental protection, aerospace, etc. It is an important foundation and supporting material for the implementation of all high-temperature industrial new processes and new technologies. Efficient production and energy-saving emission reduction have an important role. The rapid development of high-temperature industries such as steel, nonferrous metals and petrochemicals, and the advancement of key equipment and technology have greatly driven the technological innovation and industrial development of refractory materials in my country. my country has become the country with the largest production, consumption and export of refractory materials and refractory raw materials in the world, and occupies an important position in the field of international refractory materials. Al2O3-SiO2 quality, magnesium-rich alkaline products, silicon carbide-based composite materials, and carbon-containing materials constitute export advantages; the design and preparation of series of alkaline materials for clean steel refining, low-carbon or carbon-free functional materials for refining and efficient continuous casting , Hot blast stoves and other key materials such as low creep Al2O3-SiO2 materials, dry nitride coke oven composite nitrides combined with silicon carbide materials, special glass and high purity oxide materials for coal chemical industry, non-oxide materials for metal smelting, etc. The technology has reached the international advanced or leading level. In cement kilns and RH refining equipment, chromium-free materials have successfully replaced chromium-containing refractories. In addition, a series of new high-efficiency thermal insulation refractory materials with micropore and micronanopore structures have also been developed. In 2016, the national output of refractory materials was 23.9124 million tons, accounting for more than 65% of the global output; the export volume of refractory materials was 1.6407 million tons, and the export volume of refractory raw materials reached 3.5635 million tons. Fused magnesia, high-bauxite, fused corundum, Flake graphite and other important refractory raw materials have an important supporting role for the world refractory industry.
However, in terms of advanced refractory materials that are directly related to high-efficiency production and energy efficiency improvement in the high-temperature industry, my country still has some gaps in terms of variety, quality, and application engineering compared with foreign advanced levels. For example, ceramic fiber is mainly composed of aluminum silicate fiber and products, and the performance of high-performance high-purity alumina, zirconia fiber and its products that have been in service for more than 1500 ℃ for a long time has a certain gap; there are few ecological and environmentally friendly biodegradable fibers, and the use temperature Below 1260℃; the research on the application technology of high-efficiency insulation materials is weak, which restricts the improvement of energy efficiency in the high-temperature industry. In terms of basic research, the research and evaluation of the high-temperature critical service performance of refractory materials such as high-temperature thermophysical properties and thermomechanical properties are insufficient, and the research on the high-temperature service behavior and life prediction of materials is weak.
China's refractory raw material resources are responsible for dual consumption at home and abroad. The current consumption rate has exceeded the tolerance limit of these non-renewable resources. The high-quality bauxite, high-quality graphite and high-quality magnesium ore resources have already shown tensions, which poses potential for the sustainable development of refractory materials and high-temperature industries. Threat. Despite the development of low-grade ore comprehensive utilization technology, a series of high aluminum homogenizers with uniform structure and excellent performance have formed a certain production scale, but the scientific application of refractory materials, comprehensive utilization of resources and the development of new refractory raw material systems are still related to refractory The urgent task of sustainable development of the material industry.
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