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    • 3. 发明授权
    • Molten steel pouring nozzle
    • 熔钢浇注嘴
    • US4854487A
    • 1989-08-08
    • US280379
    • 1988-12-05
    • Mitsuru AndoToshikazu Takasu
    • Mitsuru AndoToshikazu Takasu
    • B22D11/10B22D11/106B22D41/50B22D41/58B22D41/08
    • B22D41/502B22D41/58
    • A molten steel pouring nozzle comprising an upper nozzle made of a refractory, an upper end portion of which is to be inserted into a bottom wall of a molten steel receiving vessel; a lower nozzle made of a refractory, having, on an upper end portion thereof, a recess for receiving a lower end portion of the upper nozzle; and an open air shutoff means for preventing an open air from penetrating through an interface between the lower end portion of the upper nozzle and the recess of the lower nozzle. The open air shutoff means comprises a steel shell covering the upper end portion of the lower nozzle and having on a side surface thereof an inert gas feed port; an annular equalizing chamber, provided between the upper end portion of the lower nozzle and the side surface of the steel shell, communicating with the inert gas feed port of the steel shell; and a plurality of grooves formed between the upper end surface of the lower nozzle and the upper surface of the steel shell, one end of each of the grooves communicating with the annular equalizing chamber, and the other end thereof communicating with the recess of the lower nozzle.
    • 一种钢水浇注嘴,包括由耐火材料制成的上部喷嘴,其上端部分插入钢水容器的底壁; 由耐火材料制成的下部喷嘴,在其上端部具有用于容纳上部喷嘴的下端部的凹部; 以及用于防止露天空气穿过上部喷嘴的下端部和下部喷嘴的凹部之间的界面的露天关闭装置。 开放空气关闭装置包括覆盖下部喷嘴的上端部的钢壳,其侧面具有惰性气体供给口; 环形平衡室,设置在下喷嘴的上端部与钢壳的侧面之间,与钢壳的惰性气体供给口连通; 以及形成在下喷嘴的上端面和钢壳的上表面之间的多个槽,每个槽的一端与环形均化室连通,另一端与下喷嘴的凹部连通 喷嘴。