In recent years, the advancement of kiln technology has continuously raised the quality requirements for tilt-cast fused zirconium corundum bricks, and their usage has continued to expand. As a manufacturer, the production process of tilt-cast bricks has been updated and improved. The quality of the products has reached a relatively high level, basically reaching the international advanced level of similar products. Application of shrinkage-free fused zirconium corundum bricks. The new process highlights the characteristics of tilt-cast bricks. After strict optimization of the tilt angle, strict quality control was achieved. As a result, the shrinkage hole distribution of the product is very reasonable.
Fused zirconium corundum brick cast without shrinkage cavity
The demand for fused zirconium corundum bricks cast without shrinkage holes has been increasing day by day in recent years. In addition to the 41# fused zirconium corundum bricks that are almost entirely cast without shrinkage holes, the demand for oxidation method 33# non-shrinkage fused zirconium corundum bricks has also increased significantly. The production cost of this product is high and the production process is relatively complex, so the product sells for a higher price. In recent years, glass-melting furnaces using dense end-cast bricks have also appeared in China. This product is mostly used on the pool wall. From the perspective of manufacturing fused bricks, the process is simpler than shrinkage-free casting, the manufacturing cost is relatively low, and the sales price is of course different. The performance on the pool wall is almost the same as that of non-shrinkage cast bricks.
Basic principles for the application of shrinkage-free fused zirconium corundum bricks
(1) For the pool wall bricks in contact with the molten glass, use the oxidation method 33# to tilt-cast zirconium corundum bricks. This choice is relatively reasonable both technically and economically. If you consider the need for bricks in the later stages of the furnace, it will be even more foolproof if you make slight changes in the brick type. Of course, compared with the traditional bottom-up multi-layer brick construction of the pool wall, this choice of pool wall bricks has more advantages than disadvantages, but there is also the problem of considering one at the expense of the other. Therefore, many furnace designers are still accustomed to traditional tank wall structures. It should be pointed out that it is the best choice to use 20mm thick 44# non-shrinkage AZS bricks for the upper pool wall, while the quality grade of the lower pool wall bricks can be reduced in turn.
It is worth noting that when choosing multiple varieties of pool wall tiles, attention should be paid to the grade gap between adjacent fused bricks and tiles should not be too large. Because from the perspective of the production of various types of refractory materials, there are great differences in physical and chemical indicators, mineral composition, and performance between high- and low-grade materials. It is technically and economically unreasonable to use them adjacently.
(2) The upper structure of the furnace can almost always be made of ordinary cast fused zirconium corundum bricks, and their functions are fully sufficient.
(3) For melting furnaces with kiln bottom insulation, 75mm thick oxidation method 33# non-shrinkage AZS bricks are most suitable for the kiln bottom pavement. Used in conjunction with zirconium corundum ramming material during construction.
(4) The side walls, flat bricks, and inclined bricks of the small furnace are generally made of 33# zirconium corundum bricks made by the reduction method of ordinary casting. The furnace bottom can also be made of 33# zirconium corundum bricks without shrinkage holes or densely cast.
(5) It is best to use ordinary cast α-β alumina bricks for the tank wall of the clarification part. The bottom of the kiln should be made of α-β alumina bricks cast without shrinkage holes. The cost of this choice of kiln is higher, and oxidation method 33# AZS bricks can also be used instead.
High-quality AZS bricks for glass kilns have reliable product quality and can effectively extend the service life of the glass kiln. Rongsheng refractory materials manufacturer.
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