Classification of Unshaped Refractories

Spray material

A refractory mixture used for spraying or spraying. According to the spray method can be divided into wet spray (or mud spray), semi-dry spray and fire (flame) spray. Wet spray with compressed air containing 20 to 40% of the refractory powder slurry, can achieve a higher fog, high adhesion, can be more uniform thin layer spray. Semi-dry spray is sprayed in the nozzle at the water by the compressed air sprayed with fire-resistant powder, add water for 11 ~ 14%, low adhesion, can be a thick layer of the spray. Fire spray is a dry spray, the spray material sent to the fuel - oxygen spray gun flame, spray material in the nozzle flame part of the melting and attached to the brick lining.

Spraying material material is aluminum siliceous, aluminum silicon zirconium, magnesia, magnesium calcium, magnesium chrome and so on. The binder used is sodium silicate, phosphate, polyphosphate, bitumen, resin and the like. In order to improve the adhesion rate, plus clay, Peng (swelling) soil, lime and other additives. In order to ensure that the spray material can achieve good sintering, but also by adding sintering agent, such as serpentine, pure olivine, lime, refractory clay, iron oxide and so on.

Refractory coating

The material coated on the refractory lining. Depending on the requirements and construction methods, refractory coatings are formulated in a paste-like and mud-like form. The binder used varies depending on the material, such as the preparation of continuous casting tundish with alkaline coating phosphate, polyphosphate, magnesium sulfate; preparation of high-alumina coating with clay, aluminum phosphate, aluminum chromium phosphate, water glass The In order to improve the coating of the coating, generally add plasticizers and other admixtures. Paint is mainly used for a variety of thermal equipment lining the protective coating, or used to repair brick lining local damage.

Ramming material

A kind of bulk refractory with very low plasticity or no plasticity. Material is siliceous, clay, high aluminum, corundum, zircon stone, silicon carbide, carbon, magnesia and so on. Depending on the material and the conditions of use, inorganic binders or organic binders, such as water-soluble dextrins, carboxymethylcellulose, lignin, sulfonates, polyvinyl alcohols, which are similar to those of castables, Graphite, asphalt, tar, phenolic resin, random polypropylene and the like.

In the unshaped refractory material, the ramming material is particularly suitable for the lining of various containers for the melting furnace lining and the high temperature metal melt. Such as flat furnace and electric furnace hearth, a variety of induction furnace lining, blast furnace trench, Sheng Gang bucket and so on.

Casting material

A semi - dry pile of lint with a projection machine. Mainly used for the construction of the whole Sheng steel drum lining. Materials are siliceous, waxy stone, clay, high quality aluminum and zircon stone. The use of more high-silicon and high-alumina casting material.