Injection type spiral agitator for hot metal desulfurization

Abstract

The invention discloses an injection-type spiral agitator for molten iron desulfurization. The agitation shaft is provided with a porous injection head (6) and a helical agitation blade (4). distribution; the center of the entire stirring shaft is connected up and down to form a cavity-like straight-through blowing pipe (7), and the lower end of the straight-through blowing pipe (7) is bifurcated at the porous blowing head (6) to form a plurality of small blowing conduits (8), each The small blowing conduit (8) penetrates the outer surface of the porous spraying head (6), so that the desulfurizer is sprayed from top to bottom in multiple directions to the outside of the porous spraying head (6) through the straight blowing pipe (7). The stirring blade can expand the mixing area of ​​the axial and radial stirring of the desulfurizer, increase the entrainment circulation flow, reduce the shear power consumption, and improve the force of the stirring blade; it can further improve the movement mode of the desulfurizer steam in the molten iron , so that it can perform a spiral upward movement to increase its solubility, thereby effectively desulfurizing; it is suitable for thin and long desulfurization hot metal tanks, and meets the current desulfurization process requirements of both stirring and spraying.

Description

technical field [0001] The invention belongs to the field of hot metal pretreatment desulfurization equipment, and in particular relates to an injection type spiral agitator for hot metal desulfurization. Background technique [0002] With the rapid development of modern industrial production and science and technology, the requirements for steel quality are increasing day by day, forcing the continuous upgrading and improvement of hot metal pre-desulfurization equipment, effectively reducing the sulfur content in hot metal, reducing the loss of desulfurizing agent, thereby reducing production costs. The existing KR (Kambara Reactor) stirring desulfurization method has good dynamic characteristics and stable desulfurization, but has obvious disadvantages: due to the rotation of the stirring shaft, the molten iron and the desulfurizing agent flow in a symmetrical cycle, and a columnar turning zone is formed near the stirring shaft. This area and the "dead zone" at the bottom ...

AI Technical Summary

Problems solved by technology

Regarding the adaptability of the existing stirring desulfurization and injection desulfurization technologies to the "slender" shaped molten iron tank and how to change the problem of multi-pipe injection mixing, there is no effective injection type desulfurization mixing device, and it is urgent to develop a good one. The new composite agitator meets the current desulfurization process requirements of "stirring and spraying" of the agitator, realizes the agitation blade to strengthen the agitation axial flow and radial flow, and the agitation particles ejected from the injection pipe can evenly and effectively react with the molten iron. It can further improve the reaction kinetics of molten iron mechanical stirring desulfurization, increase the desulfurization efficiency and the effective utilization rate of desulfurizer, shorten the stirring time, increase the service life of the stirring blades, etc.

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