1. The base material is unqualified. In order to reduce the cost, some manufacturers use Q235 steel for the embryo body, which directly causes the carbon and sulfur in the steel to gasify during the enamelling process, causing a large number of air bubbles to form between the enamel layer and the base body and inside the enamel layer, resulting in The enamel bond strength is reduced. The enamel layer changes rapidly when it encounters cold and heat, and it is easy to burst the porcelain. Therefore, the glass-lined reaction tank is made of steel with carbon content and low sulfur as the embryo body, which can prevent the explosion of porcelain.
2. Electrostatic puncture, the liquid with suspended solids is stirred in the glass-lined reaction tank, the suspended solids and the enamel are strongly rubbed, and the suspended solids themselves also produce friction, which will generate a large amount of electrostatic charge, and the high electrostatic charge will produce strong friction on the enamel. Therefore, the stirring speed should not be too fast.
3. Thermal stress damage, the glass-lined reaction tank is fired at a high temperature of 900 ℃, and the enamel and the steel plate are bonded together after cooling. Since the coefficient of linear expansion and elongation of enamel is smaller than that of steel plate, the deformation of glass-lined after cooling is smaller than that of steel plate, and enamel is constrained by steel plate to generate compressive stress.
4. Mechanical damage, the impact resistance of glass-lined is very poor, and any metal or hard object hitting it will cause damage to the enamel. Therefore, during the use of the glass-lined reaction tank, it is strictly necessary to prevent any metal or hard objects from falling into the tank. If the material is blocked, use a plastic rod to dredge it. Cover the lid during maintenance to prevent small pits or explosions on the molten porcelain surface of the welding slag.
5. Processing stress damage. During the processing of the tank, a large amount of internal stress is generated due to reeling, stamping and welding. These stresses are eliminated before the enamel. If not eliminated, the enamel will burst. This damage tends to occur in the first three months after being put into service. Therefore, heat treatment or aging treatment of the embryo body can prevent the porcelain from bursting.
