Problems with grouting in the newly started coke oven brick gas duct
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How much pressure should be controlled when spraying gas ducts for newly constructed coke oven bricks? How to mix the materials for shotcrete and what are the pros and cons of high and low pressure.
The pressure should be controlled at 0.12MPa. As for the pulp, there should be a fixed ratio. This is generally included in our operating procedures involving hot repair.
In fact, the pressure used varies depending on the furnace type and height. If the pressure is too small, the upper part of the pipe brick cannot be sprayed, and the leakage in the upper part is difficult to solve. If the pressure is too high, the slurry will be sprayed into the combustion chamber and the chute may be blocked. The density of the slurry can be 1.05. Calculate the spraying pressure according to the length of the pipe brick.