Technical performance evaluation.
Andalusite fire-resistant plastics has not yet been developed in China, and there is no corresponding national standard, so here reference GB4758 and other current standards, technical performance evaluation of their products. In order to ensure the quality of the researched products, important physical and chemical tests and inspections were commissioned by the National Engineering Quality Supervision Station Inspection Center of the Ministry of Metallurgical Industry, the domestic refractories testing authority.
1. Chemical Composition The main chemical components of the product are A12O3 (48.10%) and 510: (42.60%), belonging to the standard A12O3: 510: series of products. The contents of other iron, chromium and other impurities are not excessive.
2, physical properties index normal temperature compressive strength: 180 °C x 24h is 13. 2MPa, 1400 °C x 3h is 31.7MPa; normal temperature flexural strength: 180'Cx24h is 9. oMPa, 1400Cx3h is ZI. 6MPa; refractoriness °C; bulk density: 2,059/em; hot bending strength: 5,0MPa; rate of change after firing: 0, 7%; moisture content: 110±5°C is 14%.
3. Technical performance evaluation The above-mentioned Ab03 content and refractoriness index are equivalent to the national standard SG4 and SD4 of clay and high-aluminum fire-resistant plastics, and its fired line has a lower change, and the strength is much higher than that of similar brands. Standards; compressive strength after drying, compressive strength after firing, high temperature flexural strength, flexural strength after firing, bending strength at room temperature, etc. are all better than the national standard, excellent in performance, widely applicable to high temperature, high pressure , heat shock, corrosion resistance of various types of high temperature furnace.
4. Main features of the product (l) The main raw material is andalusite, which is a neutral refractories of A1203:510 series, and its use temperature range C. At room temperature, it has strong viscoplasticity and strong adhesion. It is particularly suitable for parts that pass through the wall and has complex structures, difficult construction sites, and various types of door openings. (2) It can be naturally dried, and the construction site does not need special curing; it has high consolidation strength after drying, good shock resistance, and is not easy to crack or fall off. (3) Improve the use of site structure, improve the sealing performance of the furnace, energy-saving effect is remarkable. (4) The stability of heat exhibition is strong, which is much better than traditional refractory concrete and other refractory plastics. (5) High performance-to-price ratio. Although the price is higher than the traditional refractory materials, but the technical indicators and service life is much higher than all kinds of traditional materials, and the price is less than 1/2 of similar imported products. (6) The quality is stable and the product is easy to store and transport. In the cold north, the product is placed. 'C storage below, although hardened by freezing, but the performance is unchanged after thawing. (7) It is non-toxic, odorless, non-corrosive, non-polluting, non-flammable, and does not damage the health of construction personnel. It is safe to use and keep safe. (8) It is not necessary to mix, mix, mold, and water at the construction site. The product can be used after opening the package to improve working conditions, improve work efficiency, and shorten the construction period. For the remaining material, it can be used as long as it is kept sealed, and no waste will be caused.
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