(1) The transition beam at the manhole door can be prefabricated or cast in place; when arching with refractory bricks, care should be taken to completely isolate the steel structure from fire.
(2) The lowermost refractory brickwork of the ash bucket is strictly prohibited at the same seam, especially at the corner. In order to prevent collapse, a low wall is built between the front and the back to enable it to support on both sides.
(3) If it is a three-dimensional operation during construction, scaffolding should be set up on the cold ash bucket and the bamboo rafts should be laid to ensure that the foreign objects are not injured.
(4) Lighting equipment should be properly connected.
(5) When refractory bricks are built, the horizontal and vertical joints are generally 2 to 3 mm and not more than 3 mm. The horizontal error generally does not exceed ±5 rmn, and the vertical error generally does not exceed ±3 mm.
Cold ash bucket quality requirements
(1) The left and right walls of the cold ash bucket must be flat and not allowed to protrude or tilt inward; the maximum inclination of the old cold ash bucket shall not exceed 5 mm per meter and the abrasion depth shall not exceed 12 mm. Cracks and shedding are not allowed.
(2) It is forbidden to have individual bricks protruding out, no steps are allowed, and the gap is not more than 10 mm with a 2 meter flat ruler.
(3) The inclined wall on the supporting angle iron shall be flat, no bricks falling off and cracks, and there shall be no individual protruding bricks and brick layers. The depth of the erosion shall not exceed 10 mm. The sloping wall brick joints shall not exceed 3 mm, and the individual allow 4 mm, less than 10 per square meter. A sleeve of refractory concrete or special bricks is required to be placed around the pipe through the wall.
(4) There must be no air leakage to the furnace bottom.
