With the continuous development of industrial demand and technical research, the variety of lightweight refractory castable has been expanded and its application range has been greatly expanded. In terms of species division; Generally, it is classified according to the variety, production method, binder type and performance grade of the lightweight aggregate. It is commonly used to classify the lightweight castable refractory according to the variety of the lightweight aggregate into lightweight brick sand, porous clinker, hollow ball, ceramsite and expanded perlite.
In terms of the range of use, it has been developed from the original material which can only be used as the masonry material for the thermal insulation layer of high temperature furnaces to the lightweight castable which can be used as the working lining of flame furnaces below 1800 ℃. For example, a volume density of 1.5? 1.6g /cm3 lightweight refractory castable is used for pouring working lining, which has a service life of more than 2 years and has achieved good energy saving effect. However, the quality of common lightweight refractory castables needs to be further improved.
The construction of lightweight refractory castable was carried out on the inner wall of badly damaged flue pipe of gas generator. In the specific construction process, the damaged lining was cleaned up first, and then rivet was arranged on the inner wall of the metal flue according to the original design requirements. The construction process of the flue lining was completed by applying smacking and ramming. It can be seen from the construction process that the lightweight refractory castable developed by us has excellent construction performance. After construction, the lining surface is flat and smooth. During the natural curing process, the lining solidified smoothly and no cracks appeared on the surface.
After the construction and maintenance, it was put into practical application in production. After on-site observation and testing, the flue ran normally. The surface temperature is uniform, indicating the thickness of the lining is uniform. Under the condition of high temperature flue gas scour, no local structural peeling of the lining occurs. After one year's practical application, the lining of the flue was in good condition. Achieved the expected application effect. At present, the flue has been used for two years, but no obvious lining peeling and erosion phenomenon has been found. The metal structure deformation of the flue was not found and the service life of the flue was greatly extended.
Our factory is committed to producing high quality refractory castable with reliable quality and reasonable price. I plant refractory products sold all over the world countries and regions, customers have been unanimous praise, welcome to contact us.
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