One Of The High Level Materials Seamless Pure Calcium Cored Wire

A kind of molten steel calcium treatment process using seamless pure calcium cored wire belongs to the field of steelmaking technology. The process technology optimizes the structure of the pure calcium line: the inner core adopts high-density solid-core pure calcium rod to ensure the calcium content, the diameter of the core-spun wire and the thickness of the steel belt; And control the various process parameters in the feeding process: molten steel oxidation, steel slag oxidation, feeding speed and molten steel temperature, to achieve the pure calcium line calcium treatment stable industrial application. The advantages of the present invention are: solve the problem of increasing silicon in the process of using calcium silicon wire feeding, the structural design of pure calcium wire ensures sufficient feeding depth, and adopts low-speed feeding line at the same time, solves the splashing problem in the use of pure calcium line, reduces the secondary oxidation of molten steel in the process of feeding line, and makes the yield of calcium element stably controlled at more than 25%, realizes large-scale batch application, and reduces smelting cost.

1.A production method for continuous casting of steel slab for band saw, comprising electric furnace initial refining process, ladle furnace refining process, VD vacuum pumping process and continuous casting process; In the refining process of the ladle furnace, the argon gas of the refining furnace is stirred, and the stirring area is greater than 40% of the molten steel level; VD vacuum pumping process pumping time control 2030min, argon pressure control 0.200.80Mpa, ladle argon stirring needs to be greater than 15min, feed solid metal pure calcium cored wire 2.53.5m/t molten steel before hoisting, sedation time is greater than 3min after hoisting; In the continuous casting process, the superheat of the molten steel in the tundish is controlled within 3544 °C; The second cooling strength is controlled at 0.10.6L/kg, the casting billet is slowly cooled, the initial temperature of the slow cooling pit is controlled > 450 °C, and the slow cooling time is > 24h.

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