A refractory material for the cooling section of CDQ coke oven and its preparation method

Abstract

The invention discloses a refractory material for a coke dry quenching furnace cooling section. The refractory material comprises the following components in percentage by weight: 30-40% of homogenized alumina of which the granularity is 5-1mm, 10-25% of mullite of which the granularity is 3-1mm; 5-20% of corundum of which the granularity is 3-1mm, 3-15% of andalusite of which the granularity is not more than 1mm, 3-15% of corundum powder of which the granularity is less than or equal to 0.088mm, 8-25% of mullite powder of which the granularity is less than or equal to 0.088mm, 1-10% of superfine kaolin powder of which the granularity is less than or equal to 0.01mm, 3-12% of silicon carbide powder of which the granularity is less than or equal to 1mm, 0.1-6% of ferrosilicon powder, 0.1-4% of carbon black with plasticity and an organic silicon solution which accounts for 3-6% of the total weight percentage of the raw materials. The preparation method comprises the steps of mixing homogenized alumina, mullite, corundum and andalusite, and adding the organic silicon solution; adding the superfine kaolin powder and carbon black with plasticity, and mixing; adding the corundum powder and mullite powder of which the granularity is less than or equal to 0.088mm, the silicon carbide powder of which the granularity is less than or equal to 1mm, and the ferrosilicon powder, and mixing; molding; drying; firing; cooling. The refractory material disclosed by the invention can be used for increasing the strength of the refractory material for the coke dry quenching furnace cooling section by at least 50%, increasing the wear-resisting property by 2-3.5 times, prolonging the service life to reach 5-8 years, and reducing the cost.

Description

technical field [0001] The invention relates to a refractory material and a preparation method thereof, in particular to a refractory material for a cooling section of a CDQ coke oven and a preparation method thereof. Background technique [0002] At present, the service life of CDQ coke ovens does not exceed 5 years, generally around 4 years. The main reason for the short service life is that the cooling section of CDQ coke ovens is worn and damaged. Especially in recent years, with the increase of output, the volume of CDQ coke ovens has been increasing, such as the increase of 7 meters or 7 meters 3 coke ovens; while the strength of the coke loaded is increased, the hardness is high, and the wear is also increased, so that the dry The wear amount of the cooling section of the coke quenching oven reached 37.2cm 3 / h, the wear rate reaches 50-70mm / year, and even some coke ovens can no longer be used normally after being used for less than a year. According to the applican...

AI Technical Summary

Problems solved by technology

Similarly, the brick silicon carbide of this invention has high cost, and metal aluminum is easy to generate gas and crack easily, so it is difficult to apply to the refractory material in the cooling section.