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Blocking-preventing nozzle device used for preparing metal powder through gas atomization method

A nozzle device and gas atomization technology, which is applied in the field of gas atomization metallurgy, can solve problems such as blockage of the diversion tube, and achieve the effects of avoiding blockage, preventing nodules, and simple structure

Active Publication Date: 2015-08-26
HUNAN METALLURGY MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the invention is to prevent the atomizing nozzle from clogging the guide tube due to nodules

Method used

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  • Blocking-preventing nozzle device used for preparing metal powder through gas atomization method
  • Blocking-preventing nozzle device used for preparing metal powder through gas atomization method
  • Blocking-preventing nozzle device used for preparing metal powder through gas atomization method

Examples

Experimental program
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Embodiment 1

[0026] This embodiment provides an anti-clogging nozzle device for preparing metal powder by gas atomization method, such as figure 1 As shown, it includes a guide tube 1 and an air chamber 2 located around the guide tube 1. The air cavity 2 is connected to the air intake pipe 3. The air cavity 2 is provided with a nozzle ring slit 4 around the lower end of the guide tube 1; the air guide slit 5 Arranged around the guide tube 1, an air guide hole 6 communicating with the air guide slot 5 is provided on the cavity wall of the air cavity 2, and an anti-adhesive device 7 is provided between the air cavity 2 and the guide tube 1, and the air cavity 2 and the anti-adhesive device Between 7, an air guide slot 5 is formed, the opening of the air guide slot 5 is downward, and a buffer chamber 8 is set at the connection between the air guide hole 6 and the air guide slot 5, and four air guide holes 6 are evenly distributed on the wall of the air chamber 2. The width of the air guide sl...

Embodiment 2

[0028] This embodiment provides another anti-clogging nozzle device for preparing metal powder by gas atomization method, such as Figure 4 As shown, the structure is the same as the anti-clogging nozzle device provided in Example 1, the difference is only that: the air flow duct of the atomizing nozzle has the structural characteristics of Laval (Laval) nozzle, and the nozzle annular seam is designed to shrink first and then expand, so that the spray nozzle The speed of the released gas can exceed the speed of sound, which improves the atomization efficiency of the molten metal. The width of the air guide slot is 0.6 mm; the width of the air guide hole is 1.0 mm; the atomization angle is 55°; the inner diameter of the guide tube is 4.0 mm. 304L stainless steel was used as the atomization object to carry out the atomization test of the powder, the test alloy was 50kg, the atomization temperature was 1600°C, and the atomization pressure was 4.0MPa. After atomization, the parti...

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Abstract

The invention relates to a blocking-preventing nozzle device used for preparing metal powder through a gas atomization method. The blocking-preventing nozzle device comprises a flow guiding pipe and a gas cavity located around the flow guiding pipe. The gas cavity is connected with a gas inlet pipe, and a nozzle circular seam communicated with the gas cavity is formed in the periphery of the lower end of the flow guiding pipe; a gas guiding seam surrounding the flow guiding pipe is formed between the gas cavity and the flow guiding pipe, and an opening of the gas guiding seam is located between the flow guiding pipe and the nozzle circular seam; a gas guiding hole communicated with the gas guiding seam is formed in the wall of the gas cavity. The blocking-preventing nozzle device can reduce nodulation of molten metal at a nozzle and prevent the flow guiding pipe from being blocked.

Description

technical field [0001] The invention relates to an anti-clogging nozzle device for preparing metal powder by a gas atomization method, belonging to the field of gas atomization metallurgy. Background technique [0002] Gas atomization powder making technology is a technology that uses high-speed airflow to atomize and pulverize liquid metal into small droplets and solidify into powder. Because the metal powder prepared by it has low oxygen content and good powder sphericity, it has become one of the methods for preparing metal powder widely used at present. The guide tube and atomizing nozzle are the key to the gas atomization powder making technology, they determine the performance and atomization efficiency of the atomized powder. In the traditional atomizing nozzle, the atomizing gas is collected at the lower end of the guide tube through the annular seam of the nozzle, and the molten metal flows out through the guide tube, and is atomized and broken by the atomizing gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
Inventor 余勇曾归余肖明清申宗华
Owner HUNAN METALLURGY MATERIAL RES INST
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