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What is a tunnel kiln?
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Compared with intermittent old inverted flame kiln, tunnel kiln has a series of advantages. 1, continuous production, short cycle, large output and high quality. 2. It works by using the counter-current principle, so the heat utilization rate is high and the fuel is economical. Because of good thermal insulation and good waste heat utilization, the fuel is very economical, which can save about 50-60% compared with the inverted flame kiln. 3. The firing time is shortened. Compared with ordinary large kilns, it takes 3-5 days from kiln loading to kiln discharging, while tunnel kilns can be completed in about 20 hours. 4. Save labor. It is not only convenient to operate when burning the fire, but also convenient to load and unload the kiln outside the kiln, which improves the working conditions of operators and reduces the labor intensity. 5. Improve the quality. The temperature of preheating zone, sintering zone and cooling zone is often kept in a certain range, so it is easy to master the sintering law, so the quality is better and the breakage rate is less. 6. Kilns and kiln furniture are durable. Because the kiln is not affected by rapid cooling and rapid heating, the kiln body has a long service life and is generally repaired once every 5-7 years.
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