Moulding method for slag pot structure

A moulding method for a slag pot structure. A slag pot involved in the invention employs a handstand moulding (with an upward dome). The method is as below: scraping an inner cavity contour by using a scraper plate moulding method; forming a separating layer on the surface of the scraped inner cavity contour by brushing paint; scraping a slag pot external surface contour (hangers not included) out of the separating layer on the surface of the scraped inner cavity contour; forming a separating layer on the external contour by brushing paint and laying waste paper; filling in sand cores for forming a trunnion seat at the periphery; filling in hangers (hangers of the slag pot are forging pieces); placing sandboxes at the periphery; placing a runner and a sink head according to technology; forming an upper case; filling in pre-embedded cores; pounding firmly and blowing hard; removing the upper case; removing sands between the profile contour and the inner cavity contour; carrying out mould assembling; and inspecting dimension. The method provided by the invention employs repetitious usage of scraper plate to omit sand cores for forming the external surface contour and inner cavity contour and reduce joints of the sand cores; and the method not only saves time but also has low cost. A casting has few casting fins on the surface, high precision and an integral and beautiful structure.