Hot blast stove often encounters some problems in the use process. In addition to carefully reading the instructions, friends who use hot blast stove also need to pay attention to the following problems in order to prolong the service life of hot blast stove and maintain its excellent performance. First, after the hot-air stove is heated, it can not open the furnace door for a long time. When the temperature is above 400 C, no sharp cooling is allowed. For electric heating elements, it is easy to cause oxidation and skin loss when the temperature is high, and the heat and cold changes are great. For molybdenum reheating furnace, EI is often used in maintenance and should be cooled below 200 c to stop the protection gas. ①水分排出期0～200℃，是泥浆中收账水分和砌体中潮气成都找人公司排出期，必须打开炉门，同时保温时间较长。
(1) Water discharging period is 0-200 C, which is the discharging period of moisture in mud and moisture in masonry. It is necessary to open the furnace door and keep it warm for a long time.
The expansion period of masonry is the period of expansion and expansion of masonry. At this time, the temperature is not more than 50 /h.
(3) the heat preservation period is above 600 C, and every 100~200 degrees centigrade should be kept for a period of time.
2. Operational rules for operation and maintenance should be worked out, operation records and repair files should be established, cumulative working hours of operation should be counted, daily maintenance should be strengthened, changing trend of equipment technical status should be grasped, failure and damage seemingly detected as soon as possible, and hot repairs with the nature of emergency repair should be avoided. According to the load and working condition of hot blast stove, there should be hot repairs in advance. Prepare materials for repair and repair process.
3. No overload and no equipment. The maximum operating temperature of alloy elements refers to the allowable surface temperature of elements in dry air, not the temperature of heated materials or the temperature around the elements. It should be noted that the temperature of the heating element itself is 100 degrees higher than the temperature of the surrounding medium or the heating temperature.
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