1. Start and ignite the hot air generator in the middle of the feeding tank, pay attention to the oil, gas, and air volume not to be too large. After the operation is stable, turn on 1~2 hot air generator fans at the rear end of the melting part to perform air distribution (no Ignite!), so that the dense airflow circulates regularly, and the temperature everywhere rises evenly. Take the temperature of the temperature control point on the big chute as the standard to raise the temperature strictly as planned. As the temperature rises, gradually increase the air volume and gradually start the hot air generator.
2. Longitudinal temperature difference (the difference between the highest and the lowest temperature) of the large chrysanthemum should be controlled at no more than 20°C before 350°C, and no more than 40°C after 350°C. The lateral temperature difference of Daquan must be controlled at no more than 15°C before 350°C and no more than 30°C after 350°C. With the increase of hot air volume during the kiln process, the kiln pressure will gradually increase from small to large. Negative pressure is strictly prohibited during the entire kiln process. When there are interference factors, try to maintain the stability of the dense pressure and avoid large fluctuations.
3. When the kiln temperature reaches 200℃, turn on the L-shaped suspended wall cooling fan and the steel ballast cooling fan, and turn on the pool wall cooling fan at 350℃. After the fan is started, the air supply volume increases gradually from small to large. After 300℃, it can be opened step by step and slightly adjusted the opening degree of each branch flue gate to ensure a balanced heating of each small furnace. Start a waste heat boiler (including induced draft fan) after 600℃. The opening of the flue gate of the waste heat boiler should be from small to large, and special attention should be paid to maintaining the stability of the kiln pressure and the temperature in the kiln.
4. Record the temperature and expansion rule once an hour. When the strip is loosened for the first time, it should be less loose. At the same time, it is necessary to find out the amount of fall back corresponding to the amount of looseness, so as to be aware of it; generally, the expansion of the anchor is 2~4mm, The loose brace shall fall back 1~3mm, and the amount of fall shall not be greater than the amount of expansion. When the dope swells violently, loosen less once and loosen frequently to avoid excessive swelling. At the same time, be careful not to loosen too much, and it is strictly forbidden to "open" on the lower surface of the brick. When loosening the stretch strips, pay attention to the two sides at the same time. .
5. The L-shaped hanging wall and the small hanging wall with card neck only loose the top wire during the baking process, and the hand feel should be looser in the degree of mastery. Special attention should be paid to the gable wall behind the melting part and the front and back gable wall of the cooling part. Special attention should be paid to the observation in the kiln, because the expansion of the gable under the gable causes the gable wall to swell, and small vertical cracks will appear on the gable wall. The gable itself has expansion joints, so the horizontal expansion is not large, so in principle, only the top wire is loosened. In the process of loosening the longitudinal top wire of the regenerator, the vertical top wire of the breast wall, the top wire of the vertical pool wall and the top wire of the pool bottom, the hand feel should be as tight as possible. The top wire of the horizontal pool wall can feel looser.
