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Desulfurization spray gun with multiple reinforcing tubes

The technology of desulfurization spray gun and strengthening pipe is applied in the field of molten iron desulfurization equipment, which can solve the problems of falling off, falling off of refractory material, ablation of spray pipe, etc., and achieve the effects of reducing thermal stress, improving strength and delaying the speed of diffusion.

Inactive Publication Date: 2014-04-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: "Flat Iron Reinforced Plate Longevity Desulfurization Spray Gun" (ZL01252249. X) and "Molten Iron Pretreatment Spray Gun" (ZL01251907.3) Although they have solved the problem of spray gun spray pipe and gun head falling off, and prolong the average working time of the spray gun , but there are still problems such as longitudinal cracks caused by uneven expansion of reinforcing tubes or ribs, local shedding of refractory linings caused by longitudinal cracks, and ablation of injection tubes, which limit the further improvement of the service life of the spray gun

Method used

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  • Desulfurization spray gun with multiple reinforcing tubes
  • Desulfurization spray gun with multiple reinforcing tubes
  • Desulfurization spray gun with multiple reinforcing tubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A desulfurization spray gun with multiple reinforcing tubes. Such as figure 1 , figure 2 and image 3 As shown, the outer wall of the blowing pipe 2 is evenly fixed with four reinforcing pipes 1, and the reinforcing pipes 1 are fixedly connected by reinforcing ribs 6. The lower end of the lower end communicates with the inner tube 5 of the nozzle hole, and the center line of the nozzle tube 2 is perpendicular to the center line of the inner tube 5 of the nozzle hole; The reinforcing rib 6 and the anchor piece 3 are integrated.

[0019] Such as figure 1 As shown, the upper end of the blowing pipe 2 protrudes from the upper end of the refractory material outer lining 4, the nozzle hole inner tube 5 is horizontally arranged near the lower end of the refractory material outer lining 4, and the two ends of the nozzle hole inner tube 5 are located outside the refractory material The outer wall of the lining 4. The upper ends of the reinforcement tubes 1 are flush with ...

Embodiment 2

[0023] A desulfurization spray gun with multiple reinforcing tubes. Except following technical parameter, all the other are with embodiment 1:

[0024] The outer wall of the blowing pipe 2 is evenly fixed with 5-6 reinforcing pipes 1;

[0025] The vertical distance between the lower end of the reinforcing tube 1 and the centerline of the nozzle inner tube 5 is 200-300 mm;

[0026] The diameter of the anchors 3 is 6 mm, and the vertical distance between the anchors 3 is 350-400 mm.

[0027] Compared with the prior art, this specific embodiment has the following positive effects:

[0028] In this specific embodiment, 4 to 6 reinforcing pipes 1 are evenly fixed on the outer wall of the blowing pipe 2, and the blowing pipe, reinforcing pipe, nozzle inner pipe, reinforcing rib and anchor piece are poured into one body with a refractory castable, that is, the fire-resistant The material outer lining 5 is integrated with the blowing pipe 2, the reinforcing pipe 1, the nozzle inner...

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Abstract

The invention relates to a desulfurization spray gun with multiple reinforcing tubes. The technical scheme of the invention is as follows: 4-6 reinforcing tubes 1 are uniformly fixed on the external wall of a spray blowing tube 2 and are fixedly connected through reinforcing ribs 6, anchoring members 3 are uniformly welded to the external wall of each reinforcing tube 1 along the axial direction, and the lower end of the spray blowing tube 2 is vertically communicated with a spray hole inside tube 5; a refractory outer lining 4 formed through casting is integrated with the spray blowing tube 2, the reinforcing tubes 1, the spray hole inside tube 5, the reinforcing ribs 6 and the anchoring members 3; the upper end of the spray blowing tube 2 extends out of the upper end of the refractory outer lining 4, the spray hole inside tube 5 is arranged on the refractory outer lining 4 close to the lower end of the refractory outer lining 4, and end openings of the two ends of the spray hole inside tube 5 are located at the external wall of the refractory outer lining 4; the upper ends of the reinforcing tubes 1 are all level with the upper end of the refractory outer lining 4, the lower ends of the reinforcing tubes 1 are located above the spray hole inside tube 5, and the vertical distance from the lower ends of the reinforcing tubes 1 to the centerline of the spray hole inside tube 5 is 100-300mm. The desulfurization spray gun has the characteristics of simple structure and long service life.

Description

technical field [0001] The invention belongs to the technical field of molten iron desulfurization equipment. In particular, it relates to a desulfurization spray gun with multiple reinforcing pipes. Background technique [0002] The content of sulfur in steel directly affects the properties of steel. At present, the hot metal pretreatment methods used by major iron and steel plants include the injection method and the mechanical stirring method, and the desulfurization efficiency of the former is higher than that of the latter. Therefore, the desulfurization injection technology outside the molten iron furnace is widely used in the metallurgical industry. [0003] As an important part of desulfurization injection pretreatment outside the molten iron furnace, the spray gun works under harsh conditions and frequently suffers thermal shocks in molten iron at 1350-1400 °C. In the process of use, it is subjected to thermal shock shock during the alternating process of inject...

Claims

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Application Information

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IPC IPC(8): C21C1/02C21C7/064F27D3/18
Inventor 罗会信李亚伟林倩王腾常庆明魏国前欧阳德刚李明晖
Owner WUHAN UNIV OF SCI & TECH