Self-cooling iron liquid pretreating spray gun

A molten iron pretreatment, self-cooling technology, applied in the direction of manufacturing converters, etc., can solve the problems of unavoidable uneven expansion of the metal gun core, short service life of the desulfurization lance, limited service life of the lance, etc., to ensure the performance of injection desulfurization. , The effect of improving the performance of injection and avoiding local cracks and spalling

Inactive Publication Date: 2006-08-16
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the metallurgical industry, the spray gun used for the pretreatment of the molten iron furnace before the converter steelmaking is mainly composed of a metal gun core and a refractory gun lining. Composition, the refractory material gun lining is formed by integral casting of castables. The disadvantage is that due to the poor compatibility between the metal gun core of the spray gun and the refractory material gun lining outside the gun core, serious longitudinal cracks burn through and the gun lining Problems such as peeling and gun head falling off, resulting in a shorter actual service life of the desulfurization spray gun
Although, Chinese Patent No. is respectively ZL01251907.3, ZL01252249.X, ZL200320115797.7, ZL03254739.0 and ZL0

Method used

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  • Self-cooling iron liquid pretreating spray gun
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  • Self-cooling iron liquid pretreating spray gun

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] Using 45# carbon steel seamless pipe, ordinary carbon steel wire rod, iron-chromium-aluminum heat-resistant metal wire and other materials to make an inverted T-shaped injection port self-cooling molten iron pretreatment spray gun, the structure is as follows figure 1 shown. The main pipe (1), the air-cooled pipe (15) and the reinforcing pipe (8) are made of 45# carbon steel seamless pipes. The end of the pipe (15) is machined with an air cooling nozzle (11). The reinforcing pipe baffle (12) is connected to the reinforcing pipe (8) at the end of the blowing port (6) by means of threads or welding; The diameter of the ring rivets (4) is 5mm smaller than the diameter of the gun body, and the distance between the ring rivets (4) is 80mm. The V-shaped anchor (3) is made of ordinary carbon steel wire rod, the wire diameter is 6mm, and the V-shaped angle is 60°; the outer walls of the main pipe (1) and the air-cooled pipe (15) are welded with cylindrica...

Example Embodiment

[0028] Example 2:

[0029] Using 15# carbon steel seamless pipe, ordinary carbon steel wire rod, iron-chromium-aluminum heat-resistant wire and other materials to make a bottom direct blowing nozzle self-cooling molten iron pretreatment spray gun, the structure is as follows image 3 shown. The main pipe (1), the air-cooled pipe (15) and the reinforcing pipe (8) are made of 15# carbon steel seamless pipe, and the air-cooled pipe (15) is inserted between the main pipe (1) and the reinforcing pipe (8), and the air-cooled pipe (15) is The end of the pipe (15) is machined with an air cooling nozzle (11). Connect the reinforcing tube baffle plate (12) to the reinforcing tube (8) at the end of the blowing port (6); use the iron-chromium-aluminum heat-resistant metal wire to make the ring riveting part (4), the wire diameter is 4mm, and the ring riveting part ( 4) The diameter is 5mm smaller than the diameter of the gun body, and the distance between the ring rivets (4) is 80mm. T...

Example Embodiment

[0030] Example 3:

[0031] Using 45# carbon steel seamless pipe, ordinary carbon steel wire rod, iron-chromium-aluminum heat-resistant metal wire and other materials to make a self-cooling molten iron pretreatment spray gun with the nozzle of the vaporization chamber, the structure is as follows Figure 4 shown. The main pipe (1), the air-cooled pipe (15) and the reinforcing pipe (8) are made of 45# carbon steel seamless pipe. The air-cooled pipe (15) is sheathed outside the main pipe (1), and the end of the air-cooled pipe (15) is Machining the air-cooled spout (11). Connect the reinforcing tube baffle plate (12) to the reinforcing tube (8) at the end of the blowing port (6); use the iron-chromium-aluminum heat-resistant metal wire to make the ring riveting part (4), the wire diameter is 5mm, and the ring riveting part ( 4) The diameter is 5mm smaller than the diameter of the gun body, and the distance between the ring rivets (4) is 100mm. The V-shaped anchor (3) is made o...

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Abstract

The invention is about the hot iron pretreatment ejection gun. It can solve the problem of the mismatch of the gun core material and the gun line material. The gun includes: the main duct, the columnar rivet, the V anchorage piece, the ring rivet, the gun line of fireproof material, the spraying mouth, the gun bar, the intensified pipe, the organic coating, the wind cooling duct, the wind cooling jet, the intensified pipe baffle plate, the air intake and the gas nozzle. The gun of the invention has the simple structure and the long life.

Description

technical field [0001] The invention relates to a spray gun for pretreatment of molten iron, in particular to a spray gun for spraying desulfurization, dephosphorization and desiliconization of torpedo tanks or molten iron tanks. Background technique [0002] At present, in the metallurgical industry, the spray gun used for the pretreatment of the molten iron furnace before the converter steelmaking is mainly composed of a metal gun core and a refractory gun lining. Composition, the refractory material gun lining is formed by integral casting of castables. The disadvantage is that due to the poor compatibility between the metal gun core of the spray gun and the refractory material gun lining outside the gun core, serious longitudinal cracks burn through and the gun lining Problems such as peeling and gun head falling off lead to a shorter actual service life of the desulfurization spray gun. Although, Chinese Patent No. is respectively ZL01251907.3, ZL01252249.X, ZL20032011...

Claims

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Application Information

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IPC IPC(8): C21C5/46C21C7/04
Inventor 欧阳德刚罗安智胡清明胡铁山王庆芳陈双全周明石王海青
Owner WUHAN IRON & STEEL (GROUP) CORP
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