Refractory mortar is used as refractory masonry joints unshaped refractory material, by a certain proportion of particles of refractory powder and binder, admixture composition, add water or liquid binder tune into slurry. Refractory mud according to the characteristics of its hardenable coagulant can be divided into hydraulic, thermosetting, gas-hard refractory mud. Hydraulic cement mortar is a cement, can be used at room temperature or may be in constant contact with water or water. Hot-hard fire-resistant mortar commonly used phosphate or phosphate thermosetting binder made of such mud hardening in addition to a variety of temperatures have a higher strength, there are shrinkage, tight joints, strong erosion-resistant features. Gas-hardening refractory commonly used sodium silicate and other gas-rigid binder preparation, this mud can make masonry joints tight. Fire-resistant mud is divided into two categories of heavy and light. According to the binding agent is divided into phosphate slurry, water glass and organic binder slurry; According to the material is divided into clay, high aluminum, corundum, mullite and siliceous and other carbon-containing mud in the actual Application, according to the product of the material, choose the appropriate species of refractory mud.
First, aluminum silicate refractory mud
Aluminosilicate refractory mud is divided into two kinds of clay mud and high aluminum mud, these two mud is the most common in the country now use two.
1, clay mud
Clay refractory mud using hard clay clinker as a base, with soft clay or chemical binding agent. Mainly used in blast furnaces, stoves and other clay brick masonry joints and repairs.
2, high aluminum mud
High alumina refractory mud main material used aluminum clinker, binder with soft clay or chemical binding agent. Our company according to the masonry parts of the masonry composition and the use of the requirements of the determination of alumina content. Can be widely used in high-alumina brick masonry of various industrial furnaces. In the blast furnace bottom, hearth, belly, waist and other parts are widely used in hot stove for masonry roof, regenerator, combustion chamber.
Second, siliceous mud
Silica mud is made of siliceous material, soft clay, chemical binding agents and admixtures. Silicone materials are silica brick powder and silica powder.
Siliceous refractory mud is mainly used in thermal equipment such as coking coke oven and glass melting furnace. Compared with silica fire mud, the siliceous refractory mud is thick paste after mixing, it has the characteristics of slow water loss, easy masonry, full seam, strong bond and resistance Erosion and abrasion resistance, but also can save the amount of refractory mud, so by the user's praise.
Third, carbon mud
Carbonaceous mud is divided into high aluminum and magnesia two categories, each category is divided into several species, is masonry carbonaceous brick is not important material, but also some carbonaceous or carbonaceous products good irrigation Seams and seams.
Raw materials are mainly alumina clinker, corundum, mullite, sillimanite, kyanite, industrial alumina, magnesium aluminum spinel, sintered magnesia, fused magnesia and silica. Binding agent mainly resin, asphalt and water glass.
In carbon-containing high-alumina and magnesia-based refractory slurries, powder such as sillimanite, kyanite and silica is used as a bulking agent to compensate for the shrinkage of the water-resistant slurry at high temperatures and to ensure the stability of the joint.
Fourth, insulation fire-resistant mud
Insulating refractory mud is made of heavy and light refractory raw materials, binding agents and admixtures, masonry insulation refractory products dedicated mud. It is divided into two types of aluminum silicate and silicon.
As we all know, adiabatic fire-resistant products, the apparent porosity greater than 45%, that is, greater water absorption, with the traditional refractory mud masonry, poor spreadability, poor mobility, gray seam difficult to guarantee, and not full. The newly developed insulation refractory mud, to overcome these shortcomings, to ensure a good masonry quality.
Refractory refractory insulation powder used in refractory materials: heavy materials are high bauxite clinker, clay clinker, silica brick and semi-silica brick, etc .; light materials are all kinds of insulating brick, hollow ball, fly ash powder Beads and beads, etc .; binder mainly with aluminum dihydrogen phosphate, dextrin, water glass and polysaccharides starch; admixture of lignin nitrate, polyphosphate; plasticizer mainly soft clay, expanders Kyanite and silica.
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