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Why Use SiC in Coreless Induction Melting of Iron

Why Use SiC in Coreless Induction Melting of Iron

Reduces FeO and MnO slags in the furnace. SiC + 2FeO РSi + 2Fe + CO2 FeO and MnO slags react with the SiO2 in the lining to produce fayalite eroding the lining surface. Removing FeO and MnO reduces lining wear. Removing FeO and MnO in melting keeps them out of the castings. Some foundries report a 50% reduction in slag defects in their castings. Less slag going to the landfill. Reduced power consumption. Lowest cost Silicon unit and also has a carbon benefit. SiC contains approximately 63% Si, 27% C in SiC, and 3% free Carbon. Silicon recovery is in 90% to 95% range, Carbon recovery is in the 87% Р92% range. Consider the price you pay for FeSi and Carbon and you will find SiC is a money saver. De-Oxidizes the melt Reduces or stabilizes the chill behavior of the melt. Renders higher and more consistent Mg treatment. How to use: SiC disassociates (dissolves) rather than melts. Therefore: Add before the charge metallics with the carbon raiser to longest exposure to the liquid melt, most stirring action, etc. If possible, add with furnace power on. Usage rate is typically 15-30 lbs/ton charged for gray iron and 8-20 lbs/ton charged for ductile iron. Note: Charging the maximum amount allowed by the base Si control range will provide the most benefit and savings. Source: Dauber Company, Inc.  Manufacturer of High Quality Silicon Carbide Briquettes. Made in the...