is as a rule practiced in mains frequency induction furnaces, The optimum sump height corresponds to approx. 2\/3 of the filling level, since in this case the whole coil is filled with molten metal, and the maximum electrical \/ inductive coupling is available. Medium-frequency furnaces are operated with a sump of approx. 15% of the total capacity. After tapping a medium-frequency furnace, the sump is still at a relatively high temperature. When switching on the output again after charging, the remaining sump would be very well coupled, and would be over-heated for a short time. This produces an \u201celephant\u2019s foot\u201d as is normal in mains frequency furnace operation. To avoid this, approx. 30% of the sump weight charged into the sump should consist of compact cooling scrap (risers, sprues and approx. 100 mm large pieces). In larger furnaces (from approx. 5 t), a \u201cstarter block\u201d with a weight of approx. 30% of the sump weight can also be charged in. This simultaneously lowers the temperature, raises the bath level and reduces the wear to the crucible wall.<\/p>\n","protected":false},"excerpt":{"rendered":"
is as a rule practiced in mains frequency induction furnaces, The optimum sump height corresponds to approx. 2\/3 of the filling level, since in this case the whole coil is filled with molten metal, and the maximum electrical \/ inductive coupling is available. Medium-frequency furnaces are operated with a sump of approx. 15% of the … Continue reading Sump melting<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1629","post","type-post","status-publish","format-standard","hentry","category-unkategorisiert"],"acf":{"adresse":"","telefon":"","e-mail":"","webseite":""},"_links":{"self":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/comments?post=1629"}],"version-history":[{"count":1,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1629\/revisions"}],"predecessor-version":[{"id":1630,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/posts\/1629\/revisions\/1630"}],"wp:attachment":[{"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/media?parent=1629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/categories?post=1629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aboutfoundry.com\/en\/wp-json\/wp\/v2\/tags?post=1629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}