Coke oven in the long-term use, by high temperature, mechanical force and physical, chemical reaction and other effects, the furnace body aging and damage is inevitable. What are the main causes of furnace aging and damage? NextCoke Oven Manufacturersfor everyone to introduce.

(1) Effect of temperature change. In the production process, when the furnace door is repeatedly opened and closed, coal is loaded and coke is extracted, the thermal stress generated by the temperature change of the inner and outer surface of the furnace wall causes the furnace wall to be denuded or cracked. As the furnace age becomes longer, the degree of damage increases and extends into the furnace; the coal loading port is also prone to denudation and cracks due to the great influence of the external cold air flow; the roof brick at the furnace head is also often fractured due to temperature changes.

(2) Mechanical force. After the cracks or deformation of the wall surface of the carbonization room, the mechanical stress generated by closing the furnace door and pushing the coke will expand the cracks in the furnace wall and aggravate the deformation of the wall surface. Especially when it is difficult to push the focus, the impact is more serious.

(3) physical and chemical action. Silica (SiO2) in silica bricks can interact with metal oxides (Na2O, FeO) in coal at high temperatures to form low-melting silicates (Na2SiO3, Fe2SiO4) on the surface of silica bricks. These low-melting silicates gradually fall off from silica bricks under the action of mechanical forces such as temperature stress and coal loading and coke extraction.

The above reasons cause the normal aging of coke oven is inevitable. However, there are other reasons for coke oven damage, such as hidden dangers during furnace masonry, inappropriate brick seam size, no secondary jointing, inaccurate reservation of expansion joints; The quality of refractory materials is not good, refractory bricks and refractory slurry do not meet the specified technical requirements; The heating rate was not well controlled during oven drying. Poor production operation, smoke and fire in the furnace door, many accidents, negative pressure operation in the carbonization chamber, and frequent opening of the furnace door or furnace cover for a long time, pusher coke flat coal is not normal, etc.; The iron parts of the furnace are not well managed and lose their protective effect. The thermal system is unstable; The hot repair work of the coke oven is poor.

Keywords: Coke oven manufacturer