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Process for making metal powder by water atomization method


The process of making metal powder by water atomization has a long history. In ancient times, people poured molten molten iron into water, causing it to burst into fine metal particles. Water atomized pure iron powder was used as the raw material for making steel. Until now, there are still people in the folk who pour molten lead water directly. Make a lead shot into the water. The water atomization method is used to make coarse alloy powder. The process principle is the same as that mentioned above for water to burst metal liquid, but it has greatly improved the crushing efficiency.

The high-pressure water atomization method is used to make coarse alloy powder. The crude gold is first melted in a furnace. The molten gold solution must be overheated by about fifty degrees, and then injected into the tundish. Start the high-pressure water pump before the gold liquid is injected, and let the high-pressure water atomization device start the workpiece. The gold liquid in the tundish passes through the beam and enters the atomizer through the leakage nozzle at the bottom of the bag. The atomizer is the key equipment for making coarse gold alloy powder by high-pressure water mist. The quality of the atomizer is related to the crushing efficiency of the metal powder. Under the action of the high-pressure water from the atomizer, the gold liquid is continuously broken into fine droplets, which falls into the cooling liquid in the device, and the quick liquid solidifies into alloy powder. In the traditional high-pressure water atomization process for making metal powder, metal powder can be continuously collected, but a small amount of metal powder is lost with the atomized water. In the process of making alloy powder by high-pressure water atomization method, the atomized product is concentrated in the atomization device, and is precipitated and filtered. Alloy powder, there is no loss of alloy powder in the whole process.

The complete set of high-pressure water atomization equipment for alloy powder is composed of the following parts:

For the melting part, an intermediate frequency metal smelting furnace or a high frequency metal smelting furnace can be selected. The capacity of the furnace depends on the amount of metal powder processed. A 50 kg furnace or a 20 kg furnace can be selected.

Atomization part. The equipment in this part is non-standard equipment. It should be designed and arranged according to the site conditions of the manufacturer. There are mainly tundishes: when the tundish is produced in winter, it must be heated in advance. Atomizer: the atomizer will come from high pressure The high-pressure water from the pump impacts the gold liquid from the tundish at a predetermined speed and angle, breaking it into metal droplets. Under the same water pump pressure, the amount of fine metal powder after atomization is related to the atomization efficiency of the atomizer; atomization cylinder: it is the place where the alloy powder is atomized and crushed, cooled, and collected. In order to prevent the ultra-fine alloy powder in the prepared alloy powder from being lost with water, it should be left for a period of time after being atomized, and then placed in a powder collection box.

Post-processing part: powder collecting box: used for collecting the atomized alloy powder and separating and removing excess water; drying furnace: drying the wet alloy powder containing water; sieving machinery: sieving alloy powder, Substandard coarser alloy powder can be remelted and atomized as remelted material.


Previous Posts: Development of alloy powder2019-10-08
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