Ductile pipe melting process requirements (
Melt temperature is higher than general cast
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melting point of high chromium cast iron, which is about 1200 ℃, the melt temperature is about 1500 ℃, choose medium frequency induction furnace smelting.
Lining by acidic or alkaline lining, ratio of furnace lining, knotting, drying and sintering are conducted according to the conventional process.
Charging general loading in normal order, such as grey iron, molybdenum iron first packed into the bottom ferroalloy, and then wait for scrap steel, according to the principle of under tight on loose loading (
Help falling material)
Sending the melting will be melt, electric power to the biggest (because of its high melting loss of Cr
About 5% ~ 15%)
, so the ferrochrome should be in the final to join, usually after all scrap melting into roasted red ferrochrome.
DNA for all metal furnace charge after melting and temperature to 1480 ℃, then add ferromanganese, ferrosilicon and aluminium deoxidizing (
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