After the KR desulfurization process of the steelmaking plant is invested, due to the characteristics of the KR desulfurization process, the damage of the inside of the iron water tank lining work layer has intensified, reducing the life of the iron can. To this end, after the actual research on the KR desulfurization process and the analysis of the damage mechanism of the working layer of the iron water tank, start in many ways.
1. The refractory material in the iron water tank should have performance
(1) The refractory material in the iron water tank must first have a certain normal temperature to meet the knocks and transportation during the construction process;
(2) The refractory material in the iron water tank, especially the tank wall resistant material and bottom refractory material, must have a certain high temperature resistance strength to meet the washing and impact of iron water -resistant refractory materials during the desulfurization process;
(3) The refractory material in the iron water tank must have good thermal anti -seismic stability to prevent the phenomenon of cracks and peeling from the influence of stress during temperature changes;
(4) The refractory material for iron water tanks must also have good resistance to slag erosion performance and infiltration performance to prevent drilling iron and eroding iron -water tank permanent layer of refractory materials, eliminating the occurrence of iron water leakage accidents;
(5) Iron water tanks must have excellent anti -chemical erosion performance with refractory materials to prevent the loss of resistance during use due to chemical erosion.
2. Work layer of refractory brick material improvement
Since the original working layer of the 140T iron water tank is implemented by KR desulfurization, the service life of the iron water tank is greatly reduced. The original iron water tank working layer material is ordinary high -aluminum clay tiles, which cannot meet the needs of KR desulfurization. In view of this situation, the choice of KR desulfurization iron water tanks should use fire -resistant materials with high intensity, brushing, anti -erosion, good thermal shock stability, and not easy to produce structural stripping and heat -peeling. In view of the above analysis, the refractory brick material of the working layer of iron water tanks has been improved.
(1) Material of refractory brick material.
The working layer of KR desulfurization iron tanks uses AL2O3-SIC-C brick. Al2O3-SIC-C quality refractory tiles have the excellent characteristics of high temperature resistance, high strength, high hardness, and good corrosion resistance. The stability of thermal shock stability, excellent wear resistance and chemical corrosion resistance. In Al2O3-SIC-C bricks, SIC can play a role in anti-oxidant. Under high temperature, SIC's SIC oxidation to form SIO is forming a glass state. The ground blocking the air hole and preventing further oxidation. In addition, SIO and AI2O3 responded to mullite at high temperature. The oxidation ability is better than the ordinary high aluminum clay brick, which can meet the needs of KR method desulfurization.
