Low Carbon Ferrochrome Furnace

The main raw materials for smelting low-carbon ferrochromium using the electro silicothermic method include chromium ore, silicon chromium alloy, and lime. Some processes also incorporate fluorite and iron scales. Understanding the specifications and quality of these raw materials is crucial for the low carbon ferro chrome manufacturing process.

Chromium ore should be a dry, clean lump or concentrate with a lump size of less than 50mm. It must contain Cr2O3>40% and have a Cr2O3/Σ FeO ratio greater than 2.0. Additionally, the phosphorus content should not exceed 0.03%. Silicon chromium alloys are selected based on the grade of the micro carbon ferrochromium being smelted. For smelting low-carbon iron with a carbon content of 0.06%, the carbon content of the silicon chromium alloy should be less than 0.06%. Similarly, for smelting low-carbon ferrochromium with a carbon content of 0.03%, the carbon content of the silicon chromium alloy should be less than 0.03%. The silicon chromium alloy should be free of slag, and the block size should not exceed 15mm. Fragments less than 1mm should be sieved out to maintain consistency in the low carbon ferro chrome manufacturing process. Lime requires a CaO content greater than 88% and a phosphorus content less than 0.02%. Newly burned lime with a block size of 10-50mm should be used.