Novel system for preparing spherical powder through plasma atomization

A plasma and plasma torch technology, which is applied in the field of plasma atomization to prepare spherical powder systems, can solve the problems of low atomization efficiency, easy to wear rotating shaft, limited diameter, etc., so as to save resources, reduce costs, and improve sphericity Effect

Active Publication Date: 2017-08-29
JIANGSU TIANYING PLASMA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the current EIGA technology: the induction coil limits the diameter of the raw material bar of the induction electrode, and the large-diameter electrode requires a higher induction heating power supply and induction coil, and the cost is higher; in order to ensure that the electrode stays stably in the coil, the vertical feeding speed How to cooperate with the rotation speed of the electrode is also a complicated problem, and the problem still needs to be solved; after the electrode is heated and melted by induction, it flows into the gas atomization nozzle, and the metal droplets should maintain a stable and continuous flow state without interruption, and there will be liquid in the actual atomization process. Drops, or the

Method used

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  • Novel system for preparing spherical powder through plasma atomization
  • Novel system for preparing spherical powder through plasma atomization
  • Novel system for preparing spherical powder through plasma atomization

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Embodiment 1

[0033] Such as figure 1 , The plasma atomization preparation spherical powder system in this embodiment includes a feeding device 1, a double-jet plasma torch 3, an atomization tower 4, a vacuum pump 5, an air supply device 11, a cyclone separator 7, a filter 8, The inert gas recovery tank 9 and the gas compression tank 10, the atomization tower 4 are welded by stainless steel plates, and the welds are fixed by tie hoops. The volume needs to be increased or decreased, and each section is equipped with sample collection, observation window devices, temperature measurement and pressure measurement points. The atomization tower includes an inner wall and an outer wall. There is a space between the inner wall and the outer wall to form a water-cooled interlayer 4-1. The water-cooled interlayer is provided with a spiral water-cooled guide groove, and is provided with a water inlet and a water outlet. The water-cooled interlayer passes through deionized water. , Control the wall te...

Embodiment 2

[0037] This embodiment is an improvement made on the basis of Embodiment 1, as figure 2 , the plasma torch selects three laminar flow plasma torches 3-1, installed on the top of the atomization tower 4, and equipped with a plasma torch position adjustment device 12. Plasma torch position adjustment device such as Figure 4 As shown, the position adjustment device includes a spherical sealing joint 12-1, a connecting rod 12-3, a sleeve rod 12-4 and a hydraulic transmission device 12-2, and the plasma torch is installed on the atomization tower through the spherical sealing joint 12-1 4, its tail is connected to the hydraulic transmission device 12-2, the sleeve rod 12-4 is vertically fixed on the atomization tower, and is covered with the corundum casing 1-1, the hydraulic transmission device 12-2, the connecting rod 12-3, Cover bar 12-4 is hinged successively. Through the combination of the sleeve rod 12-4, the connecting rod 12-3 and the hydraulic transmission device 12-2 ...

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Abstract

The invention discloses a novel system for preparing spherical powder through plasma atomization. The novel system for preparing spherical powder through plasma atomization comprises a feeding device, one or more plasma cabinets, an atomization tower, a vacuum pump and an air supply device, wherein the vacuum pump and the air supply device are both connected with the atomization tower, and the air supply device is used for supplying inert gas. The novel system for preparing spherical powder through plasma atomization further comprises a powder screening device, and a discharge outlet of the atomization tower is connected with the powder screening device. The plasma cabinets are mounted at the top of the atomization tower. The atomization tower comprises an inner wall and an outer wall, and a water-cooling interlayer is formed between the inner wall and the outer wall. The multiple plasma cabinets are arranged, raw materials in the molten state are impacted while raw materials are molten through a gathering focus point of a plurality of angled jet flows by means of the high-temperature and high-speed jet flows, and the particle size of powder is effectively reduced; and an atomization main body is cooled rapidly through the water-cooling interlayer, so that atomized materials are cooled at a high cooling speed, and the quality and sphericity of collected fine powder are increased.

Description

technical field [0001] The invention relates to a plasma atomization system, in particular to a novel plasma atomization system for preparing spherical powder. Background technique [0002] With the rapid development of additive manufacturing technology (also known as 3D printing), metal injection molding (MIM), thermal spraying and other technologies, the market demand for metal powder, especially high-quality spherical metal powder is increasing. The types of metal powders demanded by the market include titanium, nickel, molybdenum, cobalt, copper, iron, aluminum, stainless steel and other metals and their alloy powders. [0003] At present, the commonly used processes for preparing metal powders include mechanical alloying, thermal reduction, molten electrolysis, and atomization. Among them, the atomization method is the main process for preparing spherical metal powder. At present, the commonly used atomization methods in China include electrode-induced gas atomization ...

Claims

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Application Information

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IPC IPC(8): B22F9/10
CPCB22F9/10
Inventor 莫德禧钟雷李要建李军陈竹严圣军
Owner JIANGSU TIANYING PLASMA TECH CO LTD
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