wanhaorefractory

Submerged entry nozzle was development in 1960s. At first time, it was produced from quartz. With the development of continuous casting, it can not meet the requirement of high level continuous casting and special steel casting.  With the improvement of the level of casting, especially special steel casting, quartz submerged entry nozzle can not meet requirement of casting life and steel quality. Therefore, aluminum carbon and aluminum carbon-zirconium carbon combined submerged entry nozzles came out. Compared to quartz submerged entry nozzle, this nozzle is of much longer service life. In order to adapt to low carbon steel casting, the inner layer of the nozzle uses special materials like aluminum magnesium, ceramics, etc. For casting aluminum killed steel, nozzle would easy to get block out of caking. Against this condition, both blowing argon in the way of ventilation and using non-carbon-containing and calcium zirconate material have achieved a good result....

During continuous casting, the   casting powder   is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of   refractory products in our factory. Function of   mold fluxes : 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubricatio...

Refractory brick is made of refractory clay or other refractory raw materials, it is in color light yellow or brown. Refractory brick is a kind of refractory materials with a certain shape and size. According to manufacture methods, it can be divided into sintering brick, non-sintering brick, fused cast brick, and refractory insulating brick; according to shape and size, it can be divided into standard brick, common brick, and special shape brick. Refractory firebricks can be used as furnace building material and structural material for building furnaces and various thermal equipments, and it can withstand various physical and chemical changes and mechanical effects at very high temperatures. For example, refractory clay brick, high alumina brick, alumina carbon brick, magnesia brick, etc. Refractory brick is one of the most widely used products in refractories, and do you know its characteristics? 1. Chemical composition: The main components determine refractory brick...

Brown fused alumina is based on bauxite, coke as the main raw material, then melting in the electric furnace with high temperature.The abrasive tools that made of brown fused alumina is suitable for grinding high tensile metal,like general steel,malleable cast iron, hard bronze, etc.,also can be used in making high grade refractory . Brown fused alumina is charactized with high purity,good crystallization,strong liquidity,lower linear expansion rate and erosion resistance. Application: 1.It is used to make high grade refractory ,castable, firebrick etc. 2.Sand blasting--moderate hardness, high packing density, no free silica, large density, good toughness, it is the ideal "environmental protection" type sandblasting materials. 3.Free grinding.It is general domestic high grade abrasive material that is used in the field of  image tube, optical glass, monocrystalline silicon, lens, glass, crystal glass, jade, etc., 4.Resin grinder 5.Coated abrasives--It is t...