A brick kiln is a type of tunnel kiln where wet bricks made of gangue and shale are fired into finished bricks. It is usually more than 140m long and 2.8m, 3.3m, 4.6m, 6.9m or 9.2m wide, according to the size of the kiln.
With the development of the brick and tile industry, tunnel kilns are widely used. Issues such as the ends, firing quality and energy consumption of the kiln are gradually emerging. The dome of the traditional dome tunnel kiln is built with T-shaped refractory bricks. Since refractory bricks have poor thermal shock resistance, there are always slitting and spalling problems. In addition, the horizontal thrust of the dome kiln is large, so the wall requires special reinforcement. This consumes a lot of materials and time.
Because the upper space is large and the temperature difference is great, this greatly affects the quality of products and increases coal consumption. In the recent decade, the tunnel kiln begins to be flat-topped. Initially, the flat top is built with refractory cement blocks and refractory concrete. But since these materials have poor thermal shock resistance, the service life is just 2 years, so it greatly increases the cost.
Ceramic fiber is made of alumina powder. The powder is melt at 2000℃ and then spun and blown into fiber. It has high purity, good thermal shock resistance and good acid and alkali resistance. Its service life can reach up to 10 years. It is easy and safe to install. It is only 1/20 of refractory bricks and has good energy saving performance.
No comments:
Post a Comment