The tips during using of high strength wear resistant refractory castable
High-strength wear-resistant refractory castable is a cement-based composite single-component dry mortar, high strength cement, mineral admixture, high strength aggregate and anti-wear agent, formulated by industrial production. High-strength wear-resistant castable dedicated to metallurgy, coal, thermal power, chemical industry, cement and other industries slag ditches, mines, unloading tank, the hopper, silo lined anti-wear layer and water conservancy and hydropower, port and other projects Of the flood gates, discharge hopper anti-wear layer, play a role in protecting the foundation concrete (or steel silos).
High-strength wear-resistant refractory castable mixing water can be used on-site, construction and workability is good, through the manual plastering in the silo or trough surface to form a certain thickness of anti-wear layer, after normal maintenance to meet the technical requirements, with wear High, with the basic concrete (steel silo) high bond strength, impact resistance, high compressive strength, durability, long service life and so on.
High-strength wear-resistant refractory castable in use should pay attention to the following points:
1, mandatory mixer must be used, artificial mixing materials are strictly prohibited.
2, strictly control the amount of water, winter construction room temperature must be greater than 5 ℃, and have some antifreeze measures.
3, This product is prohibited mixed with other grades of castables.
4, anchoring nails must increase the expansion cap or brush asphalt paint.
5, the preservation of March.
Thermal conductivity is one of the most important thermophysical properties of high strength and wear-resistant castables. It is an indispensable and important data in the design of high-temperature thermal equipment. It is also an important factor for selecting high-strength and wear-resistant castables. Thermal conductivity is of particular importance for castings that require good insulation properties and for flame-retardant furnace construction materials that require good blade performance. Adopting high-strength and wear-resistant castable with small thermal conductivity to masonry lining of thermal furnace can reduce the thickness or heat loss and save energy. High-strength and wear-resistant castable with large thermal conductivity can be used as flame screen and heat exchanger , Can improve the furnace wall temperature and heat transfer efficiency.
Solid phase, particle and stomatal conditions are collectively referred to as the macro-structure of high-strength wear-resistant castables. The difference between this structure and the fiber structure is that the macro-scale structure is described on the macroscopic scale when describing the solid phase, Micro-scale description of the material in the crystalline phase, the glass phase and stomatal conditions and relationships become microstructures. High-strength wear-resistant castable from the particles, powder and binder preparation. After mixing, molding and firing, the product contains pores. High-strength wear-resistant castable macrostructure is composed of two parts solid phase and stomatal heterogeneous body. Compared with ceramic materials, high-strength wear-resistant castable contains larger coarse particles, the composition and structure of large non-uniform.