Common testing items for refractory bricks
1.Why the error of big head and small head is allowed to be 1mm, the error of length is allowed to be 2mm, and the error of height is allowed to be 1%. Because the large and small head errors of 1 mm can be adjusted with refractory mortar , and the length error of 2 mm can be adjusted through the expansion cardboard and refractory mortar on the side of the brick. The height is allowed to be 1%, which is an expression. The refractory bricks used in the group kiln have three different heights: 200mm, 220mm, and 250mm. The error limit of bricks with different heights is different, but it cannot exceed 2-2.5mm. In general, we should control it at 1-1.5mm. This error can also be adjusted by fire clay. 2. Flatness: controlled at 0.5mm. Explanation: Use a feeler gauge to detect the flatness of the large brick surface. The commonly used feeler gauge specifications are 0.1, 0.2, 0.25, 0.3, 0.4, and 0.5. The maximum flatness of refractory bricks should not exceed 0.5mm....