Construction method of coating material

(1) Worklayer treatment: first of all, the slag on the surface of the working layer at the repaired position should be cleaned up as far as possible, and the dust on the surface should be blown away by air duct. The slag line oxide layer and the loose part can not be treated.

(2) Mud mixing: add water to the mud according to the requirement, mix, knead and extrude it manually (not recommended mixing with mixer). The daub can be put on the foot with plastic bags to tread the mud, and the good material is similar to the live dough, dry and wet evenly, without sticking hands. Give full play to the plasticity and cohesiveness of the patching material.

Smear the construction: the bottom layer of the self repairing position begins to smear from bottom to top. In a two-person cooperation mode, the man first takes the mud with his fist and then throws it from the bottom up to the position to be repaired. The cloth should be evenly distributed according to the damage of different parts. Then another person uses a spatula under the force of smearing, smearing to move from bottom to top, to avoid moving horizontally from left to right, to ensure the full combination of mud and slag line and steel rolling upward direction of smoothness and smoothness of the coating.

(4) Daub thickness: the thickness of the daub is about 20 mm, and should be carried out according to the trend of different positions, that is, before daubing can see the severity of different parts, daub can still see the degree of damage to different parts. Avoid forming a plane after painting, so that the original seriously damaged parts of the coating thickness must be greater than the required thickness, in the construction process of this part and the surrounding sintering inconsistent, easy to spall

_Width of smear: base on the most serious part of erosion, down about 300 mm, up about 200 mm, the total height should be more than 500 mm; the lower end of the smear should be tightly bonded with the ladle working layer to reduce the possibility of the smear layer being washed away by molten steel;

_Notes: Daubing construction is generally arranged after other repair work is completed, after daubing to ensure a certain maintenance time, generally more than 30 minutes, after the daubing material produces a certain strength, then hanging the ladle, removal of the ladle work, daubing construction ladle garbage to take manual cleaning, not through the way of turning over the ladle. The garbage is poured out to avoid damaging the coating layer.