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Which refractory materials are acidic products?

Date:2019-03-18 16:40 | From:Zhengzhou Sunrise Refractory | Author:admin
As we all know, the variety of refractory materials on the market is complicated. Today, Zhengzhou Sunrise Refractory factory focuses on refractory materials belonging to acidic products.

In this type of product, quartz silica (SiO2) is the main component (first phase), and SiO2 is an acidic oxide, so it is called an acidic product. Silica brick is a siliceous product containing more than 93% of silicon oxide, and is a commonly used representative product of acidic materials. The raw materials used for silica bricks are silica, waste silicon bricks, and the like. Its main features are strong acid slag corrosion resistance, high load softening temperature, no shrinkage or even slight expansion after repeated calcination, but it is easily eroded by alkaline slag and has poor thermal shock resistance. Silica bricks are mainly used in thermal equipment such as coke ovens, glass melting furnaces, and acid steelmaking furnaces. Semi-silica bricks, alkali-resistant bricks, and acid-resistant bricks have a SiO2 content of 60% to 80% and are semi-acid materials. The clay brick is made of refractory clay and contains 30% to 46% of alumina, which is a weakly acidic refractory material. The refractoriness is 1580~1770°C, it has good thermal shock resistance, and it has corrosion resistance to acid slag. It is widely used and is the most refractory material with the largest production capacity.
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