Fused cast refractory for glass kiln
Among the fused cast zirconium corundum refractories, zirconia has the effect of improving corrosion resistance; the process of fused cast zirconium corundum refractories is to uniformly distribute primary zirconia with suitable particle size and shape in the glass phase of suitable composition and quantity, so that the primary slant The zircon and glass phases cooperate with each other and protect each other; this can make the fused cast corundum refractory have a higher zirconia content, a lower glass phase content and a higher manufacturing qualification rate. With the popularization of oxy-fuel combustion technology, low-exudation fused cast refractory materials have been developed, such as ER2001.
Silica refractory for glass kiln
In the 1980s, my country introduced the manufacturing technology of advanced silica bricks for glass kilns from the United States. After adopting all-oxygen combustion technology, the service life of silica bricks has been drastically reduced from 5 to 10 years to 2 to 3 years. Rat holes and erosion are the main causes of damage. The rat hole is caused by the alkali in the leaking gas from the kiln condensing on the joints of the bricks to corrode the silica bricks. On the one hand, by improving the dimensional accuracy of bricks, reducing brick gaps, and reducing kiln gas leakage; on the other hand, using low-calcium silica bricks or high-purity silica bricks with better corrosion resistance and designing the kiln lining structure to make alkali The condensing temperature zone is moved to the unshaped refractory layer behind the silica brick to increase the life of the silica brick.
Alkaline refractories for glass kiln
Refractory materials for the regenerator of the glass kiln. Generally, the uppermost layer of the regenerator lattice uses high-grade magnesia bricks w (MgO)>97%; the upper layer uses medium-grade magnesia bricks, w (MgO) is about 95%～96%; the middle layer uses direct Combined with magnesia-chrome bricks; low-porosity clay bricks are used for the lower layer. For this reason, glass companies have expanded the amount of M-97 magnesia bricks and direct-bonded magnesia chrome bricks in the regenerator, and replaced the poorer performance M-95 magnesia bricks, extending the life of the regenerator from 1a to 3a. Achieved initial success. If a longer service life is obtained, the composite spinel material can be used in the middle layer of the regenerator of the glass kiln. At present, this type of material has achieved good results.