Double-blowing molten iron desulfurization device

Abstract

The invention provides a double-blowing molten iron desulfurization device. The device comprises a molten iron tank and a liftable stirring jetting device, wherein the stirring jetting device comprises a vertical stirring shaft and stirring blades located at the lower end of the stirring shaft; the stirring jetting device further comprises an air intake pipe and a plurality of horizontal L-shapednozzles; the stirring shaft is axially provided with a cavity, and the air intake pipe is embedded into the cavity of the stirring shaft; the plurality of L-shaped nozzles are symmetrically arranged on the periphery of the air intake pipe along the center of the air intake pipe and are all located below the stirring blades; the bottom of the molten iron tank is provided with an annular gasket; thebottom of the molten iron tank is provided with a plurality of air ventilation bricks, wherein each air ventilation brick is connected with a blowing pipe; and a support and a plurality of flow baffle rods are arranged above the molten iron tank, wherein the upper ends of the plurality of flow baffle rods are fixed on the support, and the lower ends are inserted into the molten iron tank and close to the inner wall of the molten iron tank. According to the double-blowing molten iron desulfurization device, the contact time between a desulfurizing agent and molten iron is long, the flow fielddynamics in the blowing process of the molten iron tank is optimized, the using efficiency of the desulfurizing agent is improved, the desulfurization efficiency is high, and the equipment structure is compact.

Description

technical field [0001] The invention relates to the technical field of molten iron treatment, in particular to a double-injection molten iron desulfurization device. Background technique [0002] Hot metal desulfurization equipment includes KR mechanical stirring equipment and injection desulfurization equipment. [0003] KR mechanical stirring is to put the cross-shaped stirring head poured with refractory material and baked into the molten iron ladle to a certain depth, and the vortex generated by its rotation, the weighed desulfurizer is added to the surface of the molten iron by the feeder, and is The vortex is involved in the molten iron to make the calcium oxide-based desulfurization powder fully contact and react with the molten iron to achieve the purpose of desulfurization. Its advantage is that the dynamic conditions are superior, it is beneficial to use cheap desulfurizers such as CaO, the desulfurization effect is relatively stable, the efficiency is high (desul...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the combined use of KR mechanical stirring desulfurization and injection desulfurization can improve the desulfurization effect of molten iron to a certain extent, but the respective advantages have not been fully utilized, and the efficient complementarity of the two cannot be formed.

Moreover, the structure of the KR mechanical stirring desulfurization equipment and the structure of the injection desulfurization equipment are superimposed, resulting in a complex structure of the molten iron desulfurization device, a small space, inconvenient operation and difficult maintenance

In addition, in order to improve the dynamic conditions of desulfurization in existing hot metal desulfurization devices, several inner flanges are usually arranged on the inner wall of the hot metal tank, but the inner flanges arranged on the inner wall of the hot metal tank will not only affect the lining of the hot metal tank, but also Causes accumulation of desulfurizer at the inner flange

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