Requirements of continuous casting copper mould tube for molten steelThe continuous casting copper mould tube puts forward very strict requirements on the qua
Requirements of continuous casting copper mould tube for molten steel
The continuous casting copper mould tube puts forward very strict requirements on the quality of molten steel. The so-called continuous casting molten steel quality mainly refers to:
1. The temperature of molten steel. The requirements for continuous casting molten steel are: low superheat, stability and uniformity.
2. The purity of molten steel. Minimize harmful impurities (such as S, P) and inclusions to ensure the smooth running of the casting machine and improve the quality of the cast slab. If the S content in molten steel is greater than 0.03%, longitudinal cracks of the cast slab are prone to occur. The high content of inclusions in molten steel can easily cause the accumulation of internal arc inclusions in the cast billet of the arc casting machine, which affects the quality of the product.
3. The composition of molten steel. Ensure that the alloying elements added to the molten steel can be evenly distributed, and the composition is controlled within a narrow range to ensure the stability of product performance.
4. The pourability of molten steel. It is necessary to maintain a suitable and stable molten steel temperature and degree of deoxidation to meet the castability of molten steel. Such as aluminum deoxidation, the high content of Al2O3 inclusions in molten steel and poor fluidity can easily cause clogging of the tundish nozzle and interrupt pouring.
Therefore, it is necessary to accurately and moderately control the temperature, composition and purity of the continuous casting molten steel according to the product quality and continuous casting process requirements. The rhythmic and balanced supply of qualified quality molten steel to the continuous casting machine is the first priority for smooth continuous casting production.
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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