Square bloom continuous casting manufacturing method facilitating elimination of core defects
A manufacturing method and bloom technology, applied in the field of large-section billet production, can solve problems such as ineffective elimination of core loose shrinkage cavity defects, adverse effects on product comprehensive performance, and poor flow feeding ability of steel materials, etc., to achieve Optimize the effect of shrinkage cavity defect elimination, reduce the risk of occurrence, and the effect of high porosity elimination ability
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[0036] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In order to make the following explanation easy to understand, the key equipment structure is enlarged, and the specific size ratio in the schematic diagram is not limited to be consistent with the actual situation.
[0037] Taking the application of this continuous casting manufacturing method in the production of blooms with a cross-section of 300mm×360mm as an example, the refined molten steel enters the mold 2 through the tundish 1, and the molten steel in contact with the mold solidifies to form a continuous state of solid-liquid coexistence. Billet 4. The continuous casting billet 4 is stably pulled out from the bottom of the mold 2 and then enters the secondary cooling zone 3. The billet drawing speed is 0.6m / min, which ensures a stable continuous casting billet production process and also a large core surface temperature gradient.
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