干熄焦旋转焦罐用莫来石质复合衬板的应用

Application of mullite composite lining plates for dry quenching rotary coke tanks

为了降低衬板烧损、脱落,提高节能效果,在干熄焦旋转焦罐采用莫来石质复合衬板取代铸钢或合金衬板。结果表明:圆锥段较致密的莫来石质复合衬板密度在2.2 g·cm^(-3),磨损量为4.08 cm^(3);直筒段轻质的莫来石质复合衬板密度在1.95 g·cm^(-3),磨损量为17.6 cm^(3)。莫来石质复合衬板使用后内部无收缩缝,无烧损,无孔洞,密封性好,其圆锥段衬板耐烧损性能好,使用半年以上无衬板脱落事故。采用铸钢或合金衬板焦罐的外表面温度在480~570℃,而莫来石质复合衬板焦罐的外表温度在120~170℃,保温性能得到大幅度提高。在现有焦罐笼架基础上采用莫来石质复合衬板可及时处理,整块切换,利于提高使用寿命,减少维护工作量。

In order to reduce the burning loss and the spalling and to improve energy efficiency,the mullite composite lining plates were used to replace cast steel or alloy lining in the dry quenching rotary coke tank.The results show that:the dense mullite composite lining plate in the cone part has the density of 2.2 g·cm^(-3) and the loss of 4.08 cm^(3),and the light weight mullite composite lining plate in the straight cylinder part has the density of 1.95 g·cm^(-3) and the loss of 17.6 cm^(3).After using,there is no internal shrinkage gap,no burn loss or holes,indicating good sealing of the mullite composite lining plate.The lining plate for the cone part has good burn loss resistance,without spalling for more than half a year.The outer surface temperature of coke tanks adopting the cast steel or the alloy lining is 480 to 570℃,that of the one adopting mullite composite lining plate is 120 to 170℃,showing largely improved insulating property.Adopting mullite composite lining plates on the basis of the current coke tank cage,the lining plate can be timely treated and wholly changed,improving the service life and reducing the maintenance workload.