Due to the long-term friction of cold coke in the cooling section, the wear resistance of mullite refractory bricks cannot meet the production needs, and the refractory bricks are seriously worn for more than a year.
The CDQ cooling section adopts plastics for overall ramming, which has achieved certain results. Plastics are made of mullite silicon carbide as the matrix material, phosphoric acid and aluminum phosphate as binders, combined with micropowder technology, and processed through trapping, mixing, extrusion, cutting, packaging, storage and other processes, also known as For hard armor and plastic. In order to ensure the effective combination between the plastic and the original worn refractory bricks, it is necessary to paint the adhesive on the surface of the original masonry to connect the new and old materials and enhance the integrity between the new and old materials. The binder is composed of plastic isomorphic high-grade fine powder, binder and admixture. At the same time, compound admixture is added to adjust the bonding time and improve the flexural bonding strength.
The most effective maintenance method for the cooling section is to cast a layer of castable with a thickness of 80-100 mm on the damaged masonry surface. To withstand coke wear, thermal stress spalling and gas impact. Protect the stability of the structure above the ramp. The wear-resistant castable is used. The application effect is good, generally can be used for more than two years.
In addition, wear-resistant castables are used to make prefabricated bricks as the working layer of the cooling section. Remove the original worn refractory bricks and rebuild with prefabricated bricks. With this method, it can generally be used for more than 4 years.
