Refractories for coke oven

Coke oven furnace body structure is what? The use of refractory materials is how? According to the Xinmi Changxing refractories experts, coke oven is thermal equipment dry distillation of coal coke and chemical products, mainly by the carbonization chamber, combustion chamber, top, chute, the regenerator and the small flue etc.. As each part of the main use of refractory material:

(1) Refractory material for carbonization chamber. The carbonization chamber work is periodic, coal furnace wall surface temperature dropped to around 600’C, the end of coking furnace wall surface temperature rose to 1000 to 1100 DEG C. Therefore, the carbonization chamber wall, bottom brick masonry. Furnace head of carbonization chamber at both ends of the opening of the door, because when the temperature suddenly changes, reduced from 10 00’C to 500 DEG C, exceed the temperature limit brick volume stability (573 C), so the furnace head should choose good thermal shock resistance products, most previous selection of clay brick, now tend to use high-quality high aluminum bricks, in selection of sillimanite brick and red brick masonry.

(2) Refractory material for combustion chamber. The combustion chamber and the carbonization chamber shared furnace wall, the bricks with the same carbonization chamber.

(3) Refractories for hot blast furnace. Around the top coal charging hole due to temperature fluctuations, clay brick masonry, other parts of silica bricks masonry.

(4) For refractory material chute. Chute of the combustion chamber is connected with the regenerator, requirements of brick body structure stability, resistance to the action of thermal stress. With the clay brick and small coke oven, large and medium coke using silica brick masonry.

(5) The regenerator refractories. Small coke oven regenerator single wall, partition wall, bottom and checker brick masonry are used for clay brick masonry, storage of large and medium-sized coke oven chamber, the upper masonry all using silica brick masonry, in order to make the whole to the uniform expansion of coke oven.

(6) Refractory material for the small flue. Small flue is located in the bottom of the regenerative chamber communicated with a flue. Small flue with all the clay brick lining.

In general, coke oven refractory materials are mainly siliceous refractory brick. Coke oven silica brick requires accurate size, and have a high enough volume density, thermal conductivity, high temperature creep resistance and high temperature strength of brick; phase composition to tridymite, residual quartz that less is more.