| Extensive experiments were made on structure and placement of the bottom blown lance to determine optimum parameters regarding supply of oil, oxygen and nitrogen. Under the conditions of medium and high phosphorus hot metal, know-hows regarding slag forming and dephosphorization were worked out and correlation between oxygen supply strength, temperature, target control and gas in steel liquid was identified. This technology features fewer number of lances required for bottom blowing, greater oxygen supply intensity, simple structure and easiness to operate. |