Large and medium-sized clay refractory bricks for laminated glass furnace

Large and medium-sized clay refractory bricks for laminated glass kilns are clay refractory bricks with a unit weight of not less than 50kg used to build laminated glass kilns.

(1) The cross-section of the brick is spalled:

1) Bricks with length ≤ 400mm: when the total spall width is 0.26～0.50mm, the length does not exceed 40mm; the total spall width is 0.51

When ~lmm, the length should not exceed 25mm.

2) Bricks with a length> 400mm: the total spall width is 0.26. When 0.50mm, the length is different. More than 80mm; when the total width of the spall is 0.51-1mm, the length should not exceed 50mm.

(2) The length of the cracks whose total width is less than 0.25mm is not limited.

(3)There shall be no porosity and cracks exceeding 1mm on the cross section.