The bearing steel is very demanding steel, special steel quality has always been considered to be representative of the quality. Bearing steel requires highly pure molten steel, steel, total oxygen content as low as possible. Bearing steel electric furnace process, the drawback is a complex source of scrap, resulting in high levels of harmful elements in steel, affect the service life of steel. In addition, the high cost of smelting, foreign developed and implemented converter with LF ladle refining and RH vacuum treatment process to produce high purity bearing steel. Residual elements in steel and production costs significantly reduced.

In such cases, the experimental steelmaking process, from loading system, slagging system, the blowing system, deoxy alloying and gun position control five areas are analyzed, and finally arrive at a more reasonable blowing parameters.

(1) under the hot metal composition and temperature at any time to adjust the load system, in order to maintain the tapping temperature of 1640 to 1660 ° C, w (C) is greater than 0.20%, w (P) is less than 0.015%.

(2) smelting process take double slag operation, light-burned dolomite amount of not more than 1t simultaneously with around 3t ore, to help slow heating rate and the rapid formation of primary slag with the right alkalinity and liquidity.

(3) gun position and the final slag control, Benxi Iron and advice Sec gun position, the gun position control in 1.7 ~ 2.7m, add lime to prevent signs of splash, the goal w (C) of 0.3%, a temperature of 1600 ~ 1630 ° C, the slag w (TFE) 15% ~ 20%, R is 3.4 to 4.0.

(4) The proposed aluminum ferromanganese deoxy alloying conducted the fully deoxy guarantee LF relatively low oxygen content in 8 × 10-6.

(5) Tapping process is strictly under the control of slag, take slag measures as much as possible, take a left in the furnace steel slag unsuccessful measures to avoid slag caused by too much rephosphorization.