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Molten iron spraying desulfurization spraying gun

A desulfurization spray gun, molten iron technology, applied in the direction of manufacturing converters, etc., can solve the problems of the gun core can not be reused, the main pipe is twisted and deformed, and cannot be extracted and replaced, so as to facilitate the extraction and replacement, enhance the riveting force, and improve the repair. The effect of the number of uses

Inactive Publication Date: 2007-09-19
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the distortion and deformation of the main pipe of the spray gun core in the prior art, it cannot be pulled out and replaced when the spray tube is blocked, and the gun core cannot be reused.

Method used

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  • Molten iron spraying desulfurization spraying gun
  • Molten iron spraying desulfurization spraying gun

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Specific embodiment one: referring to Fig. 1 and Fig. 2, the molten iron injection desulfurization spray gun described in this embodiment is composed of a gun shaft 13 and a spray gun complex 12 connected to the flange of the gun shaft 13, and the spray gun complex 12 includes a reinforcing tube 1, a set The main pipe 14 in the reinforcing pipe 1 and the blowing pipe 15 arranged in the main pipe 14, the graphite blowing pipe mounting seat 8 is fixed under the strengthening pipe 1 and the main pipe 14, and the graphite blowing pipe is arranged on the outside of the blowing pipe 15 bottom 10, and the graphite blowing pipe 10 is fixed on the graphite blowing pipe mounting seat 8, the outer side of the reinforcing pipe 1 is provided with a refractory gun lining 7, and the reinforcing pipe 1 and the main pipe 14 are uniformly arranged radially and axially. A bypass weldment 2 is fixed; a bridge weldment mounting hole 3 is opened on the reinforcing tube 1, and the bridge weldm...

specific Embodiment approach 2

[0022] Specific embodiment two: Referring to Fig. 1 and Fig. 2, the structure and manufacturing method of this embodiment are the same as those of the molten iron injection desulfurization lance described in specific embodiment one, the difference lies in the selection of materials, specifically as follows: adopt No. 15 The carbon steel seamless pipe is used to make the blowing pipe 15, the main pipe 14, and the reinforcing pipe 1. The graphite blowing pipe mounting seat 8 is made of No. 35 steel. The diameter is 3mm smaller than the outer diameter of the refractory gun lining, and the wire rod with a wire diameter of 10mm is used to make the V-shaped rivet 4, the double-V butterfly rivet 5 and the gun head V-shaped rivet 9. The bridging weldment 2 is made by shearing threaded steel wire rod with a wire diameter of 10 mm, and the graphite blowing pipe 10 is made by using waste graphite electrodes.

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Abstract

A desulfurization spray gun of molten iron injection, relates to a spray gun for the molten iron injection pretreatment of molten iron jar. The invention solves the problem that the core leading pipe of the spray gun in the existing art can be distorted in order that the injection tube can not be drawn out and changed when it is jammed, further not to repeatly reuse the the core of the spray gun. The invention comprises a gun body and a spray gun complex connecting with a flange of the spray gun. The said spray gun includes a intensifier tube, a main tube in the intensifier tube and an injection tube in the main tube, provided with a mounting base of graphite injection tube under the said intensifier tube and main tube, and a graphite injection tube outside of the injection tube bottom, fixed on the mounting base of graphite injection tube, there is a fireproofing gun lining outside of the intensifier tube, and a bridge weldment uniformly fixed between the intensifier tube and main tube along the circular and axial direction. The stucture can improve the rigidness and strength of the gun core, prevent the distort of the leading pipe caused by the repeat reusing of the spry gun, at the same time, the repairing and using number of the gun core is increased and the facturing cost of the spray gan is reduced.

Description

technical field [0001] The invention relates to a molten iron blowing desulfurization spray gun used for blowing desulfurization pretreatment outside a molten iron furnace before converter steelmaking, in particular to a spray gun used for blowing desulfurization pretreatment of molten iron in a molten iron tank. Background technique [0002] At present, in the metallurgical industry, the structure of spray guns used for desulfurization pretreatment outside the molten iron furnace before converter steelmaking varies according to the type of desulfurizer used, but the main function of all spray guns is to transport the desulfurizer to the depth of the molten iron. Through homogeneous or interfacial reaction, the molten iron desulfurization process is completed. It is mainly composed of two parts: a metal gun shaft and a spray gun complex. The gun shaft and the spray gun complex are connected by flange bolts. Among them, the spray gun complex is composed of a metal gun core an...

Claims

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Application Information

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IPC IPC(8): C21C7/064C21C5/46
Inventor 欧阳德刚罗安智胡清明任迅陶晓林王清方
Owner WUHAN IRON & STEEL (GROUP) CORP
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