The thermal insulation design of the furnace body is the central task of reducing the heat loss of the furnace body. It includes the selection of the thickness of the furnace wall, the arrangement of the insulation material location and the rational application of the insulation material. It not only relates to the effect of heat insulation, but also relates to the service life of the furnace body and the size of the renovation cost. It is our hope that we will receive more satisfactory benefits from more economic investment. The following is only the following introduction and discussion on the transformation process of our factory. According to the specific conditions of the heating furnace, combined with the thermal insulation performance of aluminum silicate refractory fiber, the first furnace insulation reform of our factory adopts the furnace wall, the bottom of the furnace sandwich laying tile fireproof fiber felt, and the hot surface paste stick is implemented in the low temperature section of the heating furnace. Fire-retardant fiber blanket, thermal insulation measures for the top of the cotton press.
After the transformation: (1) The furnace heat loss is reduced by 27.5 compared with that before the transformation, 0.34 kg of fuel oil per ton of steel, more than 110 tons of fuel per year. (2) After heat insulation with refractory fiber, due to good insulation performance and slow cooling As a result, the temperature increase rate is increased by 50 compared with that before the transformation, which simplifies the heating operation when the car is to be rolled. (3) After heat insulation with refractory fiber, the heating quality of the billet has been improved, and the quality of the broken roller and the product's external dimensions have been reduced due to uneven temperature, thereby reducing the power consumption of the rolling steel and the consumption of the roller. Although the application of aluminum silicate refractory fiber products in the heating furnace of our factory has achieved better economic benefits. However, due to the design deficiencies also bring about certain practical problems, specifically in the following aspects: 1 As the furnace wall is a clay brick structure, refractory fiber felt wall, due to the small thickness of clay brick masonry, high temperature The stability in the state is poor, and the average temperature inside the masonry increases significantly, and the heat storage increases, which causes the collapse of the inner wall masonry in the high temperature section and directly affects the service life of the furnace body.
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