White Aluminium Oxide Blasting Media Malaysia

When the sinter continues to be heated, the fusible eutectic mixture begins to melt first, and at the same time, the mutual melting of silicate and silica occurs(aluminium oxide blasting media). At this stage, the viscosity of the glass liquid decreases and gaseous substances are released from it(white fused aluminum oxide 60 grit). When the glass is exposed to high temperature for a long time, its chemical composition gradually tends to become uniform and uniform.

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The pre-melted binders(white aluminum oxide), NanCO3, K2CO3 and CaCO3, are decomposed into NanO, K2O and CaO at high temperature.  The sinter becomes a transparent body, and the glass liquid is formed. The glass liquid continues to heat and enters the clarification stage(white aluminum oxide 220 grit). The pre-melted binder sample has a dense structure without obvious pores, and the fluidity of the 2H increases to 210%. 

The decomposition of newly generated Na2O, K2O and CaO has higher activity, and the effect of network disconnection is enhanced(brown fused aluminum oxide). And the distribution is more uniform in the binder system. Ca can more fully play its role of polar bridge oxygen and weaken the silicon-oxygen bond, making the glass network more loose(silicon carbide companies), thereby reducing the high-temperature viscosity of the binder and reducing the refractoriness.

For example, when fired at 820 ° C(black aluminum oxide), the fluidity of binder 1A is 152%, the fluidity of binder 1H after pre-melting is reduced to 133%; the fluidity of binder 2A is 154%, and the fluidity of 2H is reduced to 137%; the fluidity of binder 3A is 155%, the fluidity of 3H is reduced to 139%; the fluidity of binder 4A is 161%, the fluidity of 4H is reduced to 150%(brown aluminum oxide 70 grit), and the fluidity of binder 5A is 164%, the flow rate of 5H is reduced to 154%.

The binder sample sintered before the pre-melting process contains a large number of pores(white fused alumina). The presence of pores expands the binder melt and greatly increases the flow area on the refractory plate, so the calculated fluidity is larger. Therefore, although the sample has a lower refractoriness after pre-melting(green carborundum), its melt structure is dense and the flow area is relatively small, so its fluidity is small after calculation.

However, when fired at 900 ° C, the fluidity of the binder 1A is 198%, the fluidity of the binder 1H increases after pre-melting to 200%(pink aluminum oxide); the fluidity of the binder 2A is 206%. This is mainly because the viscosity of the binder melt becomes lower during firing at high temperature, which promotes the removal of air bubbles in the binder melt(brown fused aluminum oxide factory), eliminating the effect of excessive fluidity due to the expansion of the pores.

Obviously, in the above formula(white corundum), Al will exist in the form of aluminum-oxygen tetrahedron [AlO], and B will exist in the form of boron-oxygen tetrahedron [BO4] and boron-oxygen triangle Body [BO3] form exists. In addition, the chemical composition of the density calculation formula after pre-melting treatment tends to be more uniform(silicon carbide price), the refractoriness is reduced, and the fluidity becomes better.