Can waste refractory bricks be reused?

Waste refractory bricks should not be reused in principle.

In some kilns where the temperature is not high and the corrosiveness is not high, the removed refractory bricks during maintenance have no missing corners or edges on the appearance, and there is no damage. The color is basically not very different from the newly produced refractory bricks. Can these refractory bricks still be used?

The dismantled refractory bricks have been fired at a certain temperature, but also subjected to high pressure and wind speed, resulting in significant changes in strength and overall performance. The overall indicators will decrease significantly. The service life of the furnace lining will be seriously affected when used in key parts of the kiln. So it cannot be used in critical or high-temperature areas. There are also many users and manufacturers who, after dismantling and replacing, manually select and use it in less important parts. Is this approach feasible?

This method is also possible, but it is not completely unacceptable. For example, some kiln drying ovens can still be used. But it must depend on the condition of the replaced refractory bricks, which must be of complete size and have little color change before they can be used. But the fire mud left behind during the construction of waste refractory bricks must be scraped clean before they can be rebuilt and used on furnaces with low temperatures.

The newly built kiln lining is absolutely unusable. Because the performance indicators of refractory bricks can no longer meet the requirements for use in high-temperature areas and furnaces. The thermal shock stability of waste refractory bricks has decreased too much, so there is no need to waste manpower and material resources with waste refractory bricks.

However, it is still possible to use it on the external platform of some furnaces, as the temperature of the external platform will not exceed 200 ℃, and the performance of waste refractory bricks is still much better than that of ordinary red bricks.

So, new furnaces, high-temperature and corrosive furnaces and components cannot be reused with waste refractory bricks at all.