Classification, structure and casting form of continuous casting round copper mould tubeClassification:round billet copper mould tube are divided into 3 catego
Classification, structure and casting form of continuous casting round copper mould tube
Classification:
round billet copper mould tube are divided into 3 categories according to the size of the cross-sectional area: 1. Small round billet (diameter below 350mm); 2. Largeround billet (diameter between 350-500mm); 3. Super large round billet (diameter greater than 500mm)
Structure:
A typical round billet mould assembly is composed of copper mould tube, inner water jacket, outer water jacket, water supply pipe, drain pipe, water ring, foot roller, bottom and top flanges, and lubrication flanges.
casting form:
Under normal circumstances, most round billet moud castings only use mold powder as a lubricant, and the immersion nozzle used is also a straight-through nozzle.
The advantage of using this straight-through immersion nozzle is that the flow rate of the molten steel on the surface of the mould is relatively small, and the liquid level is calm, which is beneficial to prevent slag on the liquid level.The disadvantage is that a series of reasons may cause quality defects on the surface and inside of the cast slab.
Therefore, external force should be used to improve the flow of molten steel in the mould. This is one of the reasons why the round billet continuous casing machine is generally equipped with electromagnetic stirring of the mould.
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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