Micro-carbon ferrochrome is a kind of ferroalloy containing chromium, with chromium ore, lime (limestone or jade-stone), broken coke as the original, through the electric furnace smelting. Because of its better performance, widely favored by consumers, the following to introduce the micro carbon ferrochrome vacuum treatment knowledge.
Micro-carbon ferrochrome contains 30% of the volume of gas (mainly N2 gas and H2 gas), used in steelmaking will float on the interface between molten steel and slag, so that the burn loss of chromium increases, the recovery rate is reduced; Chromite alloys containing air bubbles can cause a large amount of metal loss when broken and packaged. The vacuum treatment of micro carbon ferrochrome is a casting process to reduce the gas content of the alloy. It is filled with liquid ferrochrome molten iron into the vacuum chamber, sealed, with a vacuum pump for about 5 minutes to 7 minutes, vacuum up to 10.6KPa - 13.3KPa, and then destroy the vacuum, take out the molten iron bag, and then cast, can achieve the purpose of reducing inclusion and gas, and the surface is smooth and smooth, reduce crushing and packaging losses.
