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一、造成爐頂損坏的主要原因反射爐的壽命与爐頂的状况及其損耗的程度有關。爐頂損壞的主要原因是:(一)爐頂熱至超过耐火材料强度的溫度;(二)爐頂受霧化爐料的化学侵蝕;(三)粉末状燃料灰分对耐火材料的化学影响;(四)由於冷空氣進入爐內致使耐火材料的溫度發生急劇變化。砌爐頂所使用的耐火材料,如当溫度稍微低於其耐火强度時,就失掉其机械强度。因而,当溫度在1500～1690°時,由於荷重的作用,矽磚開始變形,其耐火强度等於1690～1710°。鉻鎂磚是当溫度在1560°時開始變形,其耐火强度等於1710°。这於砌築任何一种構造的反射爐爐頂和調整爐內溫度時,是必須考慮到的。在許多煉銅工廠里,为了要提高爐子的生產率,在力求增高爐內溫度的同時,建築懸吊式爐顶的反射爐。在这种情
First, the main cause of damage to the top of the furnace reflector life and the status of the roof and the extent of its loss. The main causes of damage to the top of the furnace are: (i) the temperature of the top of the furnace which is hot enough to exceed the strength of the refractory; (ii) the chemical attack of the top of the furnace by the atomizing charge; (iii) the chemical effect of the powdered fuel ash on the refractory; D) Due to the cold air into the furnace resulting in dramatic changes in the temperature of refractory material. Refractory materials used in building roofs, such as when the temperature is slightly below its refractory strength, lose its mechanical strength. Thus, when the temperature is 1500 ~ 1690 °, due to the role of load, the silica bricks begin to deform, the fire resistance is equal to 1690 ~ 1710 °. Chromium brick is when the temperature at 1560 ° began to deform, the fire resistance is equal to 1710 °. This must be taken into account when constructing any kind of reverberant furnace top and adjusting the furnace temperature. In many copper mills, in order to increase the productivity of the furnace, an attempt is made to increase the temperature inside the furnace while building a reverberatory furnace with a suspended ceiling. In this situation