Injection type spiral stirrer for molten iron desulphurization

Abstract

The invention discloses an injection type spiral stirrer for molten iron desulphurization. A porous injection head (6) and spiral stirring blades (4) are arranged on a stirring shaft. All the stirringblades (4) are uniform in size and are distributed circumferentially evenly at intervals. The center of the whole stirring shaft achieves communication vertically to form a cavity-shaped straight-through injection pipe (7). The lower end of the straight-through injection pipe (7) forks at the porous injection head (6) to form a plurality of small injection conduits (8) in a through mode. All thesmall injection conduits (8) penetrate through the outer surface of the porous injection head (6), and thus a desulfurizer passes through the straight-through injection pipe (7) to be injected to theoutside of the porous injection head (6) in multiple directions from top to bottom. The stirring blades can enlarge the mixed area of axial and radial stirring of the desulfurizer, roll-suction circulation flow is increased, shear power consumption is lowered, and the stress conditions of the stirring blades are improved. The motion mode of desulfurizer vapor in molten iron can be further improved, thus the desulfurizer vapor does spiral rising motion, the dissolution degree is increased, and desulphurization is effective. The injection type spiral stirrer adapts to a long and thin type desulphurization molten iron ladle and meets the current desulphurization process requirements of stirring and injection.

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 botto...

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.

Images