clay red brick

First: Low temperature roasting zone: The roasting zone body is red or dark red, and the temperature is significantly insufficient, so bricks need to be produced. The gate should be immediately lowered, the opened kiln door should be closed, excess air should be reduced, und gute Steinkohle sollte häufig hinzugefügt werden, um das Feuer zu fördern oder zu entzünden, Kultivierung der Brandsituation. Zu den Gründen und Präventionsmaßnahmen für diese Situation gehören::

① Der Heizwert der Kohle ist zu niedrig und die Feuerkraft unzureichend. In der Tat, Minderwertige Kohle eignet sich besser für die interne Verbrennung, da sie ein erstklassiges Schlammmaterial ersetzen kann. Um das Feuer zu fördern, sollte häufig Kohle hinzugefügt werden, Um den Luftüberschuss zu begrenzen, können auch Knüppel mit hohem Widerstand verwendet werden.

② Die Ofenarbeiter beurteilen den Brand nicht genau, especially in cloudy and rainy days and at night, they tend to overestimate small fires and lower the actual temperature.

③ When burning bricks externally, the resistance of the stack is too small, the kiln door is too close, the air brake is raised too high, and there is too much excess air. The nearby kiln door should be closed, the air damper should be lowered, und in schweren Fällen, the exit of the kiln and partial blocking of the brick stack should be suspended. Always be careful not to approach the kiln door

Zweitens, the upper surface fire is ahead of the base fire, and the difference in base fire: the upper surface fire is ahead of the base fire by several or more rows. We should increase the strong bottom wind of the remote gate, and also appropriately lower the other gates and reignite the low fire to increase temperature. Zu den Gründen und Präventionsmaßnahmen für diese Situation gehören::

① The bottom of the kiln is damp, and it is difficult to raise the temperature at the bottom of the stack. Attention should be paid to moisture-proof measures and drainage around the kiln body.

② Die Form des Code-Ofens ist nicht gut, und es wurde keine Ausdünnung an der Unterseite und keine Verdichtung an der Oberseite erreicht. Der Widerstand an der Oberseite des Knüppelstapels ist gering, und der Widerstand am Boden ist groß. Das untere Feuer kann sich nicht bewegen, also sollte es verbessert werden.

③ Beim Verbrennen von Verbrennungssteinen, Die Beine des Kang sind zu hoch und zu dünn, Die Handbremse ist zu hoch und zu nah, Die Drehrohrofentür ist zu nah, und der Luftstrom unten ist zu hoch. Beim Verbrennen von Ziegeln mit externer Verbrennung, the legs of the kang are too dense and too short, and the ash content of the external coal is too high, which blocks the passage of the legs of the kang and makes it difficult to ventilate at the bottom. Both should be adjusted.

④ Insufficient ventilation inside the kiln will inevitably lead to severe backfire. It may be due to the air brake being too low, the stack being too dense and the resistance being too high, or the flue being blocked. Adjustments or cleaning should be made after investigation.

⑤ If the fire hole is not properly stacked, the coal will not fall to the bottom. Attention should be paid to the detachment of the fire hole and the bridging of the fire hole to ensure that the coal thrown is evenly spread to the bottom.

Drittens, the bottom fire should be advanced and the upper surface fire should not move. For the rotary kiln, the bottom fire should be immediately cooled by pressing the kiln door and strong cold air in the tank. If there is a risk of kiln collapse due to the bottom fire temperature approaching the upper limit of the sintering temperature range, a hole can be drilled in the lower part of the kiln door near the roasting zone to inject cold air for cooling. Once the situation improves, it should be immediately blocked. The main reasons and prevention measures for this situation are:

① If the wind inside the kiln is too strong, especially when the suction force on the legs of the kang is too strong, or too much cold air is injected into the surface fire, it cannot burn. The distance brake should be lowered, the bottom suction force should be reduced, the fire hole should be closed to prevent cold air from entering.

② Too much coal is added externally, and there is too little coal on the stack of directly falling kiln bottom billets to burn. The far gate should be lowered and the near gate should be adjusted appropriately to reduce the bottom suction force, close the fire eye, and prevent cold air from being injected. Choose an appropriate amount of combustion air and hot air flow rate to increase the surface fire temperature.

③ To prevent coal from falling directly into the bottom of the kiln through the fire hole, attention should be paid to bridging the fire hole, so that the coal thrown is evenly spread to all parts of the billet stack after being dispersed, and it is strictly prohibited to add coal with a large shovel The kiln has poor form and uneven distribution of cross-sectional air volume.

Fourth: Severe backfire during roasting: mainly due to insufficient suction of the wind. It may be due to insufficient suction from the fan or chimney, blockage or severe air leakage in the flue, improper use of brakes, detachment of paper barriers for air leakage, or excessive density of the kiln, and inability to move the air. The cause should be identified and eliminated.

Fifth: No matter how early the switch is turned off, the fire will not move: it can be seen from the fire eye that the fire eye is stagnant or even moving backwards. Es kann sein, dass das Tor des Isolierkühlbandes kaputt ist oder nicht dicht abgedeckt ist, oder die Ofenwand in diesem Abschnitt weist starke Luftlecks auf, direkt in den Schornstein eindringen und das Feuer zurückziehen. Während der Inspektion, Der Ventilator kann gestartet und die Rauchklappe vollständig geöffnet werden. Alle Luftklappen sollten geschlossen sein, und eine Taschenlampe sollte verwendet werden, um eine Inspektion des Teppichmusters entlang der Innenwand des Ofens durchzuführen, sowie die Lüftungsöffnung und die Flammen. Wenn festgestellt wird, dass Flammen in die Ziegelfuge eindringen, there is air leakage. If flames are drilling into the air vent, the air vent will be broken or not tightly closed. For the brick joint, a depth of about 75px should be dug first, and then a mud strip made of brine with 3% zu 5% industrial salt or tofu should be added to fill the brick joint. For the air damper, It should be repaired and replaced. The inner wall of the rotary kiln is close to the main flue, which has a high suction force and is more prone to air leakage. If the situation of the kiln is not correct, Der Widerstand des Scheitstapels ist zu hoch, der Längsfeuerkanal ist blockiert, und das Feuer kann sich nicht bewegen, Es sollte eine Verbesserung vorgenommen werden.

Sechste: Das Frontfeuer bewegt sich nicht, und der Rückschlag ist nicht garantiert: In diesem Moment, Das Feuer treibt nach oben, Das Gegenfeuer ist stark, und der Boden des Ofens ist nicht klar zu erkennen. Beim Braten, Das vordere Feuer fällt nicht unter den Boden. Bitte verringern Sie schnell den Gegenbrand. Die Gründe sind: Die Handbremse ist zu hoch, was das Feuer wegzieht, oder die Ofentür ist zu nah, and the air preheating is not enough to enter the roasting zone, flowing into the legs of the kang, and the bottom fire cannot be started; Or if the fire eye blank is too dense, the coal cannot be poured out to the bottom. Deswegen, the handbrake should be lowered and the door opening should be postponed. If the temperature of the insulation bag is severely reduced, the opened kiln door and the blocked part of the kiln brick stack should also be sealed to reduce the air intake, and the middle and lower blank stacks should be appropriately increased to reduce the height of the kang legs. If the kiln worker makes a mistake in operation and causes a temperature decline, it should be detected in a timely manner. Strengthen coal feeding to maintain the fire, increase the number of high-temperature discharges, until the bottom fire is bright and without black waist, in order to restore normal discharge.