Helical blade rotary spray gun for desulfurization of molten iron

Abstract

The invention belongs to the field of desulfurizing devices in the metallurgical casting industry, and in particular relates to a helical blade rotary spray gun for desulfurization of molten iron, comprising a flange connector (1), a stirring shaft (2) and a stirring blade (3), wherein the stirring shaft (2) is fixedly connected with the flange connector (1), the stirring blade (3) is fixedly connected with the lower part of the stirring shaft (2); a nozzle (4) is fixedly sleeved in the stirring shaft (2); refractory layers (7) are attached to the outsides of the stirring blade (3) and the stirring shaft (2); the stirring blade (3) adopts a helical structure; the included angle a between the stirring blade (3) and the stirring shaft (2) is greater than or equal to 20 degrees and less than or equal to 30 degrees; a ring stress adjusting rib (8) is arranged in the refractory layer (7); and a vaporizing chamber (6) is fixedly arranged at the bottom of the nozzle (4). The helical blade rotary spray gun for desulfurization of molten iron has the characteristics of simple structure, long service life, low cost and high desulfurizing efficiency.

Description

technical field [0001] The invention belongs to the field of desulfurization devices in the metallurgical casting industry, and in particular relates to a rotary spray gun for desulfurization of molten iron with spiral blades. Background technique [0002] Spray metallurgy usually refers to the fixed injection method widely used in industry: the spray gun is in a static state when spraying from the furnace bottom, furnace wall and furnace roof to the molten pool. When the lance blows upward from the bottom of the furnace, the fixed injection method is the only way, that is, the lance needs to be fixed in the refractory layer of the bottom of the furnace. When the spray gun is inserted into the injection from the furnace wall, it is generally in a static state. [0003] The gun core in the spray gun is generally made of ordinary carbon steel materials. In order to ensure the rigidity of the gun core, there are generally multiple reinforcing rib tubes arranged around the main...

AI Technical Summary

Problems solved by technology

In actual production, due to the spalling and cracking of the refractory material of the gun body, the gun body cracks are burned through, broken, bent and other damages, which restricts the improvement of the service life of the spray gun.

[0004]The existing desulfurization spray guns for molten iron pretreatment all adopt cylindrical static spray guns. Such spray guns have high desulfurization agent splashing intensity, poor mixing effect of desulfurization agent and molten iron, and desulfurization Low efficiency and other characteristics

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