Molten steel degassing apparatus and method

Abstract

Abstract THERE IS DISCLOSED A METHOD AND APPARATUS FOR THE DEGASSING OF MOLTEN METAL, PARTICULARLY STEEL, WHEREIN THERE IS A VERTICALLY ELONGATED DEGASSING CHAMBER HAVING ITS AXIS INCLINED AWAY FROM THE VERTICAL. THERE IS A HEARTH AT THE BOTTOM OF THE DEGASSING CHAMBER THAT SLOPES FROM THE HIGH SIDE TOWARD THE LOW SIDE WITH AN OUTLET PORT FOR DISCHARGING METAL AT THE LOW SIDE. THERE IS A RISER LEG THAT OPENS THROUGH THE HEARTH AT THE HIGH SIDE AND EXTENDS DOWNWARDLY FROM THE HEARTH FOR A LENGTH RANGING BETWEEN TWO AND TWO AND ONE-HALF TIMES THE LENGTH OF THE BAROMETIC COLUMN OF MOLTEN METAL THAT MAY BE DRAWN UP INTO THE LEG ABOVE THE LEVEL OF MOLTEN METAL IN THE LADLE. WHEN THE APPARATUS IS OPERATING, PROVISION IS MADE FOR INTRODUCING GAS INTO THE RISER LEG AT A LEVEL BELOW THE TOP OF THE BAROMETRIC COLUMN. THE METAL IS CARRIED BY EXPANDING GASES UP THE LENGTH OF THE TUBE ABOVE THE TOP OF THE BAROMETRIC COLUMN AS DROPLETS AND EXPEDDED INTO THE DEGASSING CHAMBER, FALLING BACK ONTO THE SLOPING HEARTH CLEAR OF THE RISER LEG. A RECEIVING VESSEL IS CONNECTED TO THE OUTLET PORT INTO WHICH ALLOYING INGREDIENTS MAY BE INTRODUCED INTO THE DEGASSED METAL.

Inventors

• 👤 Philip E Schneider

Bibliographic Details