How will the water quality affect the continuous casting? Because the water system of continuous casting mold is a semi closed circulating system, the content o
How will the water quality affect the continuous casting?
Because the water system of continuous casting mold is a semi closed circulating system, the content of calcium and iron in water quality is high, calcium and iron have a great impact on adhesion and corrosion, and there is sufficient dissolved oxygen in the circulating system, which will accelerate the corrosion of iron. Corrosion mechanism, such as: 1. Dissolved oxygen corrosion; 2. Carbon dioxide corrosion; 3. Alkali corrosion.
In case of frequent bonding of crystallizer, in order to avoid steel leakage after bonding shell, the operator is forced to manually stop tension straightening, so as to make the bonding shell heal well and reach sufficient thickness. When the bonding point of the green shell is separated from the crystallizer copper plate, the drawing speed is gradually increased, but the bonding occurs again when the drawing speed has not reached the target drawing speed. Therefore, the drawing speed control presents an irregular step shape.
Impact of water quality on continuous casting production: the smaller the water hardness of crystallizer, the better, generally not greater than a certain value, so as to reduce the generation of scale. The pH value of water quality is not easy to be too high, and the process requirements range from 7 to 9. The closed cover used for circulating water of crystallizer shall be prevented from being excessively corroded, especially the corrosive substances shall not enter the circulating water tank. Ensure the water level of the circulating water tank and the position of the water pump to prevent the water pump from pumping the sediment at the bottom of the tank to the circulating system.
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Harm of too high temperature: when molten steel out of cooper mold, the billet shell is thin and easy to break out; The accelerated erosion of refractory can ea
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1. The barrier function (mainly completed by the liquid slag layer) isolates the contact between air and molten steel, blocks the secondary oxidation of molten
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In continuous casting, low corrosion resistance often occurs, which directly leads to uneven composition and will eventually affect the smelting quality. In or