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日本川崎公司开发了250吨喷流搅拌式钢包精炼炉,它兼有 RH 和 DH 真空脱气装置和利用气泡搅拌的简易钢包精炼炉的优点,简称为 PM 工艺(Pulsating mixing Process)。PM 的原理:在钢包精炼炉中插入一个内径600mm、长3500mm 的耐火材料圆筒,圆筒内压力呈周期变化,从而使钢水在圆筒内外流进、流出,高速流动的钢水动能使熔池搅拌。加压气体是 N_2,抽气系统使用水封式罗茨泵,抽气能力为66米~3/分,压力变化范围0.2—1.4大气压,脉动周期3—8秒。搅拌能10瓦/吨钢,钢水在圆筒内上升高度2500mm(1000mm/分)。用 PM 工艺对低炭铝镇静钢
Japan’s Kawasaki company has developed a 250-ton jet ladle refining furnace, which combines the advantages of RH and DH vacuum degassing units and bubble ladle simple ladle furnaces, referred to as the Pulsating mixing Process. Principle of PM: A refractory cylinder with an inner diameter of 600 mm and a length of 3500 mm is inserted into a ladle refining furnace, the pressure in the cylinder changes periodically, so that the molten steel flows in and out of the cylinder, and the molten steel kinetic energy of the high-speed flow makes the molten pool Stir. Pressurized gas is N2, pumping system uses a water-sealed Roots pump, pumping capacity of 66 m ~ 3 / min, pressure changes in the range of 0.2-1.4 atm, pulsation cycle 3-8 seconds. Stirring 10 watts / ton of steel, molten steel in the cylinder height 2500mm (1000mm / min). PM process with low carbon aluminum killed steel