Hubei Zhongnai New Materials Technology Co., Ltd. held a technical exchange with senior executives of Indonesia's CNi Group, and the two sides reached a strategic cooperation intention.

Fan Haiqiang, chairman of Hubei Zhongnai New Materials Technology Co., Ltd., held a technical exchange with senior executives of CNi Group in Indonesia. Both sides reached a strategic cooperation intention on new material technology development and Southeast Asian market cooperation, and will carry out in-depth cooperation in the fields of technology research and development, product application, and market development.

Zhongnai New Material Releases Construction Video of Microporous Lightweight Mullite Homogenising Material for Tundish Castable

Hubei Zhongnai New Material Technology Co., Ltd. recently released a professional construction video showcasing the application of microporous lightweight mullite homogenising material for tundish castable production. The video provides detailed demonstration of Zhongnai's independently developed high-performance refractory materials in actual application during critical steel smelting processes, offering valuable technical reference and construction guidance for industry users.

Indonesia Steel Industry 2024 Review and Future Development Plan

Indonesia's steel industry demonstrated robust growth momentum in 2024, with production capacity projected to reach 16 million tonnes, representing steady growth from the previous year. The country has risen to become the world's fourth-largest steel exporter by value, with exports growing from USD 7.8 billion in 2019 to USD 27.5 billion in 2023. With the government's target of 25 million tonnes capacity by 2035 and continued international investment from China, South Korea and other nations, Indonesia's steel industry is entering a crucial transformation period.

Latest Industry News Collection

This collection summarises the latest developments in the refractory materials industry for 2025, including market performance, technical conferences, price trends analysis, import/export trade data, and global market forecasts, providing authoritative reference information for industry professionals.

Zhongnai New Material High-Performance Microporous Lightweight Mullite Product Series

Hubei Zhongnai New Material Technology Co., Ltd. specialises in manufacturing microporous lightweight mullite aggregate products, including GM-168 aggregate, GM-166 castable, and GM-169 reinforcing agent. The products feature nano-scale microporous structures with bulk density as low as 1.4g/cm³, combining high strength with ultra-low thermal conductivity. Widely applied in steel ladles, heating furnaces, petrochemical furnaces and other high-temperature industrial equipment, these products significantly extend equipment service life whilst achieving energy conservation and consumption reduction.

Mullite firebrick, Mullite firebrick - a high quality choice

Mullite brick is a high-quality building material, which has won the recognition and favor of consumers with its excellent performance, stable quality, beautiful appearance and reliable quality. Its main raw material is highly fired mullite, after a series of process treatment, with high temperature resistance, high impact strength, high permeability resistance and other characteristics. Due to its excellent performance, mullite bricks have been widely used in power plants, petrochemical plants, refineries, metallurgical plants and other industrial sites of heat insulation, fire resistance and decoration.

The synthesis of mullite

The synthesis method of mullite can be divided into sintering method and electric melting tube fitting method. Sintering method according to the raw material production method and dry and dry method, dry processing technology is the seasoning together with cement powder, after pressing ball or compact fired by cement rotary kiln or tunnel kiln; The dry processing technology is to put the mixed material into water and grind it into slurry, and then dry it into filter cake by filter press, and squeeze mud into mud section or mud blank by vacuum pump and then fire. The fusion tube method is to add the mutual matching material to the medium frequency furnace, melt in the high temperature weather generated by the electric arc, refrigerate crystallization, and choose natural raw materials seasoning (such as bauxite, etc.), without grinding immediately crushed small pieces of raw materials to <1.5mm particles can be mixed with other powdered raw materials in the mixing machine evenly. Sintered mullite synthesis is generally carried out at 1650 ~ 1700℃. The specific processing elements of synthesis of mullite by sintering method are purity of raw material, mesh number of raw material and forging temperature. The key to the synthesis of mullite by sintering method is the solid-phase reaction between Al2O3 and SiO2, so the particle size distribution of the raw material is improved, which may speed up the in-phase reaction process. In particular, particles <8μm have a very large effect on the establishment and sintering of synthetic mullite. It can be seen that sufficient mixing and grinding of raw materials is the main processing technology to promote the solid phase reaction of synthetic mullite. Mullite generally forms gradually at 1200 ° C and stops at 1650 ° C. When the temperature exceeds 1700℃, the crystal growth and development are good. It can be seen that the ignition temperature immediately harms the growth and development of mullite crystals. Therefore, heating to a certain firing temperature and increasing a certain holding time are essential conditions for the synthesis of mullite. The purity of the raw materials commonly used in the synthesis of mullite is very strict, and a small residue composition can reduce the composition of mullite. In industrial production, it is difficult to avoid to bring a variety of residues, the book is Fe2O3, TiO2, CaO, MgO, Na2O, K2O, in which the harm is Na2O, K2O, they inhibit the production of mullite, and cause a lot of silicon-rich laminated glass phase caused by reducing the composition of mullite. Fe2O3 slows down the mullite fossilization process and increases the total number of laminated glass phases. When there is a small amount of TiO2, a part of Ti positive ions enter the mullite properties to produce ionic crystals, promoting the establishment of mullite and the growth and development of crystals. When the TiO2 composition is too high, it still acts as a solution. The mullite is prepared by melting the mutual compound in the medium frequency furnace, and the mullite is prepared by refrigeration crystallization from the melting. The crystallization process is similar to the crystallization process in the phase diagram of the Al2O3-SiO2 system software. When the Al2O3 of the mutual compound is higher than 71.8% of the basic theoretical group in mullite, the mullite ion crystal with dissolved Al2O3 of excess capacity, that is, β-mullite, will occur only when the Al2O3>80%. The mineral phase composition of mullite in fused pipe fittings is generally mullite crystal and laminated glass phase. Compared with sintered mullite, fused pipe mullite crystal growth and development is sound, large crystals, fewer shortcomings, crystal specifications are hundreds of times that of sintered mullite, so sustained high temperature physical properties and corrosion resistance are relatively better.

Cordierite is what charm beauty and deep feeling

Cordierite, also known as turquoise, is a precipitated mineral with a hard, light green, turquoise or purple color, often with pale white or light gray spots on the surface. It belongs to the gemstone class, with many legends, giving people a peaceful, clean and beautiful feeling.