Refractory Mortar/ Powder

Fireproof and refractory mortar（fire clay mortar）is a special fireproof and refractory mortar composed of high-temperature resistant inorganic refractory materials. It has excellent fire resistance, oil resistance, salt water resistance, and corrosion resistance. It can effectively prevent smoke, dripping materials, and toxic gases, and effectively curb the spread of combustion. It can be constructed by adding water and stirring on site, which is simple and convenient.  

Silicon carbide is also called emery sand or refractory sand. Silicon carbide is made of quartz sand, petroleum coke (or coal coke, and wood chips). When producing green silicon carbide, salt and other raw materials need to be added and smelted at high temperature in a resistance furnace. Currently, the silicon carbide produced industrially in my country is divided into black silicon carbide and green carbonized silicon carbide. There are two types of silicon, both of which are hexagonal crystals with a specific gravity of 3.90g/cm3.

Calcium aluminate is an inorganic salt with the chemical formula 3CaO·Al2O3. It is a white cubic crystal. Relative density 3.038, decomposes when heated to 1535°C. Insoluble in water, soluble in acid. It is commonly found as hexahydrate with a molecular weight of 377.96 and is a spherical colorless or white crystalline powder. Relative density 2.49, refractive index 1.605. It begins to dehydrate when heated to 250°C, begins to decompose and releases crystal water at 300°C, and decomposes at 700~800°C. It also decomposes when placed in water. It is prepared by reacting sodium aluminate with calcium chloride and calcium hydroxide. Used to make concrete accelerator

High alumina fine powder is widely used in the production of refractory materials such as refractory bricks, refractory cement and refractory castables. Its high hardness and wear resistance make it an ideal material to resist high temperature wear. In addition, high-aluminum fine powder also has excellent fire resistance and can withstand extremely high temperatures, so it is widely used in high-temperature industrial environments.

Refractory clay refers to clay with a refractoriness greater than 1580°C and can be used as refractory materials and bauxite used as refractory materials. In addition to their high refractoriness, they can maintain volume stability under high temperature conditions, and have slag resistance, resistance to rapid cooling and rapid heating, and a certain mechanical strength, so they are extremely firm after calcination. Refractory clay is mainly used in the metallurgical industry as a raw material for the production of shaped refractory materials (bricks of various specifications) and unshaped refractory materials. The usage accounts for about 70% of all refractory materials.

Magnesia, also known as sintered magnesia, is produced by high-temperature calcination of magnesite, brucite or magnesium hydroxide obtained by the reaction of seawater and lime milk, and has strong hydration ability. It is mainly used to make alkaline refractory materials, such as magnesia bricks and magnesia-alumina bricks, which contain many impurities and are used to pave the bottom of steel furnaces for steelmaking. The main chemical component is MgO, and the mineral component is periclase equiaxed crystal system, with a density of 3.56~3.65g/cm, a Mohs hardness of 5.5, a melting point of 2800°C, and significant volatilization at 1800~2400°C. Pure periclase is colorless, and as the content of Fe2O3 and CaO increases, the color changes from light to dark, ranging from yellow to brown to dark brown. The grain size of periclase increases correspondingly with the increase of calcination temperature and the extension of holding time, and its resistance to hydration and slag erosion also increases accordingly.

Silica is a common admixture in cement production. Because of its fine particles and stable chemical properties, it can react with minerals in cement, thereby affecting the physical and chemical properties of cement.

High-aluminum heat-resistant mortar is a heat-resistant material made of kaolin and molten bauxite as the main raw materials, adding an appropriate amount of binders, stabilizers and additives. High-aluminum heat-resistant mortar is mainly used for heating, cooling and thermal insulation joint filling in high-temperature kilns and hearths.