Angle-inserting type hot metal pretreatment spray gun

A molten iron pretreatment, oblique insertion technology, applied in the direction of injection devices, liquid injection devices, furnaces, etc., can solve the problems of low service life of the spray gun, poor spray pretreatment effect, etc.

Inactive Publication Date: 2009-01-07
WUHAN IRON & STEEL (GROUP) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve th

Method used

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  • Angle-inserting type hot metal pretreatment spray gun
  • Angle-inserting type hot metal pretreatment spray gun
  • Angle-inserting type hot metal pretreatment spray gun

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 , figure 2 As shown, the present invention comprises a gun core steel pipe 1, a refractory material gun lining 6 and several riveting parts. The angle α is 120 degrees, and the refractory material gun lining 6 is covered on the outer surface of the gun core steel pipe 1, and the outer surface of the gun core steel tube 1 is coated with 98% mechanical lubricating oil and 2% polyester by weight percentage. Burn-out coating 2 composed of propylene powder. The rivet is composed of a V-shaped rivet 3, a double-V butterfly rivet 4 and a ring rivet 5. The height of the V-shaped rivet 3 is 4mm smaller than the thickness of the refractory gun lining 6. The double-V butterfly rivet The height of 4 is 2 / 3 of the thickness of refractory material gun lining 6, the inner diameter of ring rivet 5 is 3.5mm smaller than the thickness of refractory material gun lining 6, V-shaped rivet 3, double V butterfly rivet 4 press the gun core Steel pipes are welded on the out...

Embodiment 2

[0020] The difference between this embodiment and Embodiment 1 is that the angle α between the inclined part of the lower end of the gun core steel pipe 1 and the longitudinal axis of the gun core steel tube 1 is 140 degrees; and 8% polypropylene powder; the height of the V-shaped rivet 3 is 3mm smaller than the thickness of the refractory gun lining 6, the height of the double-V butterfly rivet 4 is 1 / 2 of the thickness of the refractory gun lining 6, and the ring The inner diameter of the rivet 5 is 3mm smaller than the thickness of the refractory gun lining 6, the diameter of the V-shaped rivet 3, the double-V butterfly rivet 4 and the ring rivet 5 are 2.5mm, the V-shaped rivet 3, the double-V butterfly The riveting piece 4 is welded on the outer wall of the gun core steel pipe 1 according to the axial spacing of the gun core steel tube 40mm, 60mm or 80mm.

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Abstract

The invention discloses an inclined-inserting hot metal pretreatment spraying gun, which is used for jetting treatment for hot metal on a mixing bogie with torpedo retort. The spraying gun comprises a gun core steel pipe, a gun lining made of refractory material, and a plurality of rivet clasping pieces; the lower end of the gun core steel pipe tilts and forms an included angle of 120 to 140 degrees with the longitudinal axial line of the gun core steel pipe; the outer surface of the gun core steel pipe is covered with the gun lining made of the refractory material; each rivet clasping piece is composed of a V-shaped rivet clasping piece, a double-V butterfly-shaped rivet clasping piece and an annular rivet clasping piece, wherein the V-shaped rivet clasping piece and the double-V butterfly-shaped rivet clasping piece are respectively arranged in a working lining made of the refractory material at intervals along the circumferential direction and the axial direction of the gun core steel pipe, and welded with the external circumference surface of the gun core steel pipe; the annular rivet clasping piece is welded at the outer end of the V-shaped rivet clasping piece; the outer surface of the gun core steel pipe is coated with a burning weight-loss coating layer formed by mechanical lubricating oil and polypropylene powder, wherein the weight percentage of the mechanical lubricating oil is 90 to 99 percent, and the weight percentage of the polypropylene powder is 1 to 10 percent. Finally, the purposes of prolonging the service life of the spray gun and improving the service performance of the spray gun are achieved.

Description

technical field [0001] The invention relates to an oblique insertion type molten iron pretreatment spray gun, in particular to a spray gun used for spraying and pretreatment molten iron on a torpedo tank mixed iron car. Background technique [0002] In 1970, the original West German Thyssen company successfully researched and put into use the ATH method. It inserted a spray gun lined with refractory material into the torpedo tank at an angle of 60° to the horizontal direction, and injected 108 kg of CaC per minute. It is a compound desulfurizer, the processing time is about 8 minutes, the conveying gas pressure is 6atm, and the powder concentration is 40-60kg / Nm3. my country's Baosteel also adopted this spray gun oblique insertion type molten iron injection pretreatment process on the torpedo tank mixed iron car. [0003] In the spray gun oblique insertion type molten iron injection pretreatment system, the early design of the spray gun is a cylindrical straight gun structu...

Claims

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Application Information

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IPC IPC(8): B05B7/14C21C7/04F27D3/18
Inventor 欧阳德刚邹继新蒋扬虎罗安智吴杰李具中胡清明曾彤
Owner WUHAN IRON & STEEL (GROUP) CORP
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