1. The broken bricks need to be processed before bonding (new bricks do not need to be processed). Use refractory brick telephones for electric furnaces. First, use wire brushes, paint brushes and other tools to remove the coal coke, charcoal ash and debris on the broken bricks. Then brush the phosphoric acid solution diluted to 35-40% on the surface that needs to be wiped slightly to ensure cleanness and achieve the purpose of firm bonding; gunning material

2. Smear the cement on the cross section of the broken silicon carbide brick and the contact between the two bricks, squeeze the bricks to their original positions, and support them with temporary supports;

3. In order to prevent the cracked bricks from falling down again, a layer of high-temperature mortar with a thickness of about 5 mm is placed on the entire hanging brick facing the fire surface to the upper brick (see Figure 3, the hanging brick is plastering the fire surface), which is used for electric furnace Which refractory brick is better, so that the hanging brick becomes a solid whole;