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Continuous casting.PPT
Continuous casting was conceived in the 1860s and has since led to major improvements in efficiency, productivity, and cost reductions for metal production. The process involves cleaning and equalizing molten metal in a ladle before pouring it into a tundish where impurities are removed, then the metal travels through water cooled copper molds to begin solidifying as it moves downward along supported rollers. The key advantages are 100% casting yield due to no waste metal, an automatic and consistent process, and reproducible mechanical properties.
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Introduction to continuous casting, its historical background, and process details including cleaning molten metal and pouring into molds.
Highlights of continuous casting benefits including zero waste, automation, and high mechanical properties.
Drawbacks of the process, such as unsuitability for low production volumes and cooling requirements.
Continuous casting.PPT
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- 2. • Continuous casting –conceived in the 1860s – major improvements in efficiency and productivity and significant reductions in cost – the molten metal in the ladle is cleaned and equalized in temperature by blowing nitrogen gas through it for 5 to 10 min. The metal is then poured into a refractory lined intermediate pouring vessel (tundish) where impurities are skimmed off. The molten metal travels through water cooled copper molds and begins to solidify as it travels downward along a path supported by rollers (pinch rolls)
- 5. advantages of continuouscasting • Sprue, runner, riser, etc. are not used. Hence, no waste metal this leads to 100% casting yield. • Process is automatic. • Product has good consistent soundness. • Mechanical Properties are high and very reproducible.
- 6. DISADVANTAGE •Not suitable forsmall quantity production. •Continuous and efficient cooling of moulds is required, else, center-line shrinkage develops. •Requires large floor space.