Molten iron pretreatment spraying gun

Abstract

The invention relates to a tool in the process of smelting molten iron, in particular to a spraying gun for jetting powder in the pretreatments of desulphurization, dephophorization and desilicification in the process of smelting the molten iron. The molten iron pretreatment spraying gun comprises an internal steel pipe (1) and a fireproof material layer (2) enwrapped on the outer surface, wherein the jetting end at the lower end of the steel pipe (1) is bended, the cross section of the outer surface of the fireproof material layer (2) is a regular polygon, and a layer of steel wire gauze (3) is bound between the steel pipe (1) and the fireproof material layer (2). The molten iron pretreatment spraying gun surely achieves the expectant purpose, lightens the weight of the spraying gun, reduces the manufacturing cost, and simultaneously reduces the factory building height in a molten iron pretreatment operational area, promotes the requirements on devices, prolongs the service life, and improves the effects of the desulphurization, the dephophorization and the desilicification.

Description

technical field [0001] The invention relates to a tool in the process of smelting molten iron, in particular to a spray gun for spraying powder used for pretreatment of desulfurization, dephosphorization and desiliconization in the process of smelting molten iron. Background technique [0002] The gun core of the molten iron pretreatment spray gun of the prior art is a circular steel pipe, and the outer surface of the steel pipe is poured with refractory material. The thickness of the refractory material layer is 122.5-165mm, and the outer appearance is still circular. It plays the role of swirling and mixing. The head of the spray gun is an inverted T-shaped "three-way" structure, that is, a pipe extends down, and the head extends out of the nozzle head in two directions to the left and right. Therefore, V-shaped anchors are first welded on the outer wall of the steel pipe to increase the bonding surface and bonding force of the pouring, and then the refractory material is ...

AI Technical Summary

Problems solved by technology

[0007] Its four, the thickness of the refractory material layer of the prior art spray gun is 122.5~165mm, proved through long-term practice, after parts such as inner steel pipe are damaged, the refractory material layer still has larger utilization value, from comprehensive analysis, too thick refractory layer Not only increases the difficulty of operation, but also uneconomical

Images