Molten iron desulfurization stir head

Abstract

The utility model relates to a stirring head for desulfurization of molten iron, which relates to a stirring head for stirring desulfurization outside the molten iron furnace before converter steelmaking. In order to solve the problems of insufficient axial stirring force of the stirring head and poor discharge of molten iron on the back iron surface existing in the prior art. The technical scheme of the present invention is as follows: the stirring head comprises an air-cooled pipe (1), a stirring head connecting member (2), a metal stirring shaft (3), a rivet (4), a refractory material working lining (6) and The metal stirring blade (7), the shape structure of the refractory working lining (6) of the stirring blade is as follows: the iron facing surface (61) is a front concave arc surface, and the back iron surface (62) is a multi-segment arc with concave up and down. Form surface, side (63) are from bottom to outside inclined surface. The invention can increase the axial stirring force of the stirring head on the molten iron, and further enhance the contact reaction between the molten iron and the desulfurizing agent, so as to shorten the desulfurizing time and improve the utilization efficiency of the desulfurizing agent.

Description

technical field [0001] The invention relates to a stirring head for stirring and desulfurization outside a molten iron furnace before converter steelmaking, in particular to a stirring head for stirring and desulfurizing pretreatment of molten iron KR (Kambara Reactor). Background technique [0002] At present, the stirring head used in the KR (Kambara Reactor) stirring and desulfurization pretreatment outside the molten iron furnace before the converter steelmaking in the metallurgical industry is mainly composed of three parts: a metal stirring core, an air-cooled tube and a refractory working lining. Among them, the metal stirring core It is composed of a metal stirring shaft, four metal stirring blades and metal riveting pieces. The air-cooling pipe is inserted into the metal stirring shaft to cool the metal stirring shaft. The metal stirring shaft is a CrMo alloy thick-walled casting tube, and the metal stirring blade is made of Q235 thick The metal rivets are Y-shaped ...

AI Technical Summary

Problems solved by technology

For this reason, there are reports of new blade shape structure stirring heads at home and abroad, such as the patent "Molten Iron Desulfurization Stirring Head" ZL200520070066.4 discloses a stirring head, the difference lies in the blade structure, compared with the traditional blade structure, its iron The surface is a vertical surface, and the back iron surface is an inclined surface inclined from bottom to top. The patent "A Stirring Head for Molten Iron Desulfurization" ZL200520070065. The anti-slagging function of the head, its shortcoming is that the vertical surface structure of the stirring blade facing the iron surface is not convenient for the improvement of the axial stirring force of the stirring head

In addition, the document "Technical Status and Development Direction of KR Desulfurization Agitator" "Wuhan Iron and Steel Technology" 2005 (5) reported the experimental research results of the shape of the stirring blade carried out by Sumitomo Metal Kashima Iron and Steel Co., Ltd. , although the convex arc-shaped structure of the iron facing surface improves the axial stirring force of the stirring head on the molten iron, and has received certain effects of improving the contact reaction between the molten iron and the desulfurizing agent, shortening the desulfurization time, and improving the utilization efficiency of the desulfurizing agent, but there is The problem that the rising height of the surface is large and the molten iron on the back iron surface is not discharged smoothly

Images