2017年5月10日星期三

Application and formulation of ladle castable

Ladle Castables

Ladle refractory castable is used for the ladle of a refractory castable by adding a certain amount of binder made of amorphous bulk refractory. Ladle is used in steel mills, foundries in the open furnace, electric furnace or converter to undertake molten steel before the casting operation. Ladle refractory castable to magnesia or high alumina spinel-based. Refractory aggregate for the pure magnesia or special bauxite clinker, refractory powder for the magnesium aluminum spinel powder; binding agent for the composite binder, while adding admixtures. This kind of refractory castable has good slag resistance, anti-peeling and thermal shock resistance, compared with the magnesium-aluminum spinel refractory castable, the performance is slightly inferior, the cost is significantly reduced, suitable for national conditions, easy to promote; and Ordinary aluminum and magnesium refractory castable materials , due to the addition of spinel, rather than in the course of the gradual formation of the use, so the performance significantly improved, the cost of the user can accept the extension of life, it is more promising.

Ladle refractory castable selection of high quality bauxite, corundum and high quality magnesia as the main material, the use of composite powder and add some additives from the preparation of a kind of unshaped refractory. Ladle refractory castable its main features are: explosion-proof performance, high temperature strength, resistance to erosion and erosion erosion ability. According to different conditions of use of the preparation of different types of ladle castable points: the general aluminum and Refractory company magnesium castable, slag and Baoshen composite aluminum magnesium castable, high-grade aluminum and magnesium castable, aluminum and magnesium spinel castables and other varieties.

With the requirements of the steelmaking plant production process, the development of continuous casting and furnace refining, so that the molten steel in the ladle residence time is relatively extended, thus accelerating the damage to the lining of the molten steel, resulting in ladle low life, So the need for high-grade high-strength refractory castable. Ladle refractory castable material to high-purity fused steel jade-based materials, the matrix mixed with high purity spinel, and add the right amount of binder, admixture (dispersant, water reducing agent) made. Has a good anti-slag and anti-striatability, high volume stability, strength, sintering time is short. Effectively improve the package age and service life, can be more than eight hundred traditional furnace increased to one hundred and thirty-four furnace.

Ladle refractory castable features:
1. Strong resistance to hot metal and slag erosion;
2. Good thermal shock resistance, small change in burn volume;
3. Strong antioxidant capacity;
4. Easy construction, quick baking without burst, easy to repair and dismantle;
5. When used, do not produce harmful gases, non-stick residue, long life.

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