Wear-resistant Refractory Ramming Material

The wear-resistant and refractory ramming material uses Al2O3, 88% of special-grade bauxite clinker as aggregate and powder, and adds more fused corundum powder to improve the matrix performance, and adds Suzhou clay as a plasticizer; the aluminum-zirconium ramming material uses Al2O3 as 85% of bauxite clinker as refractory aggregate and powder, adds zircon powder and coke mud with ZrO2 as 64%; the critical particle size is 5mm, and the four-level particle grading is used; phosphate is used as a binder: the dosage is 8%-12%, and composite metal powder is added.

In the wear-resistant and refractory ramming material, adding corundum powder to improve the matrix grade can improve its performance. The high-alumina refractory ramming material mixed with zircon powder has a decomposition temperature of 1670℃ to 1540℃ due to impurities in zircon, and decomposes into Zr2O3 and SiO2. The former forms baddeleyite at high temperature, and the latter forms mullite with Al2O3. These two refractory minerals intergrow with corundum or mullite, strengthen the organizational structure, and improve the strength and corrosion resistance. At the same time, due to the volume effect, the material shrinkage is compensated and the anti-flaking property is enhanced; in the wear-resistant refractory ramming material, kyanite family minerals can also be added. With the help of high-temperature decomposition and formation of mullite, the volume expansion effect is generated to offset part of the volume shrinkage of the ramming material, which is conducive to the improvement of performance. The grade of kyanite family minerals has a great influence on the performance of refractory ramming materials, so they should be added with their concentrates, and the dosage is generally 15~35%. Refractory aggregate and powder are made from secondary alumina clinker, with a maximum aggregate size of 5mm, a mass ratio of coarse to fine aggregate of 1:1, Suzhou mud as a plasticizer, and a water glass solution with a specific gravity of 1.38 as a binder.