Technical transformation and application practice of adding cross sections to square billet continuous casting machine
Section 165 mm×280 mm of square billet of 4#continuous casting machine in Tangshan Iron and Steel Long Products Division rolled in medium size with 200 mm×200 mm×20 mm angle,due to the low compression ratio,cracks and flesh defects can occur in the rolled billet,with a rate of up to 80%,seriously affecting the yield of medium sized rolling.In order to improve the rolling yield,improve the quality of billets,increase product varieties,a series of measures such as tundish transformation,mold assembly and copper tube structure optimization,cooling system transformation and continuous casting process were taken to carry out technical transformation on the section of the 4#continuous casting machine,with an additional 200 mm×280 mm cross-section.After the trans-formation,the production application practice showed that the defect ratio of rolled products was significantly re-duced by only 2%,and the proportion of internal and external quality of the casting billet was improved,achieving the expected results,meeting the needs of steelmaking production,and achieving the diversification of long product types at Tangshan Iron and Steel.
万方数据
维普
