Coke furnace riser pipe root sealing method

Abstract

The invention relates to a coke furnace riser pipe root sealing method which comprises the following steps: 1) preparing lower-layer mixed sludge from concentrate powder, water glass and clay fireclay; 2) preparing an upper-layer coating mixture from clay fireclay, concentrate powder, clay brick fragments (the particle size is at most 3mm), water glass and phosphoric acid; 3) constructing after the thermal expansion of the coke furnace body finishes, and cleaning the slit of the riser pipe root; 4) constructing the lower-layer mixture; and 5) constructing the upper-layer coating mixture. Compared with the prior art, the sealing material has favorable binding property with the riser pipe and refractory brick, thereby ensuring the sealing effect; the method has the advantages of high strength, favorable cracking resistance and long maintenance period, ensures the production and lowers the labor intensity; the surface strength is high, thereby reducing the damage caused by external force; and the method basically prevents the riser pipe root from leakage, enhances the temperature control accuracy of the coke furnace, and improves the working environment.

Description

technical field [0001] The invention relates to a sealing method, in particular to a method for sealing the root of a riser pipe of a coke oven. Background technique [0002] The coke oven riser is located on the top of the coke oven, and its root is directly exposed to the working surface of the oven roof. Its tightness directly affects the accuracy of the temperature control of the coke oven. Once leakage occurs, it will cause a series of problems such as heat loss, gas leakage, and environmental pollution. . The material of the rising pipe is cast iron, and the refractory material of the furnace top is clay. Because of the large difference in the material properties and expansion coefficients of the cast iron and clay bricks at the junction of the two, it is difficult to seal the root of the rising pipe. In addition to the critical selection of sealing methods and sealing materials, it should also be noted that the construction timing should be selected after the expansi...

AI Technical Summary

Problems solved by technology

The traditional construction technique is that the lower layer is filled with asbestos rope stained with water glass into the gap, and the upper layer is smeared with a mixture of medium-temperature silica clay, concentrate powder and an appropriate amount of water glass. As the furnace body continues to heat up during the production process, Because the strength and compactness are not enough, or the influence of thermal expansion is not fully considered, most of them will have different degrees of cracks