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Method of reducing total oxygen in slab

Improving the cleanliness of the cast slab is the basis for the production of high-quality steel, and the total oxygen content of the cast slab is an important measure of the cleanliness of the molten steel. Reducing the total oxygen content of the cast slab is mainly carried out from three aspects: converter process, refining … Read more

Lost foam casting

 1.1 Overview In 1958, H.F. Shroyer invented the technology of making metal castings with expandable foam plastic models and obtained a patent. The model used at first was made of polystyrene (EPS) board and molded with sand containing binder. The German companies Grunzweig and Harrtmann purchased this patent and developed and applied it. The technology … Read more