The process of making metal powder by water atomization has a long history. In ancient times, people poured melted iron into the water to make it explode into tiny metal particles, as the raw material for refining iron and steel; until now, there are still people in the private sector will be melted lead water directly into the water to make lead pellets. The use of water atomization method to make coarse alloy powder, the principle of the process and the above mentioned to let the water burst metal liquid is the same, only in the efficiency of the crushing has been greatly improved.
High-pressure water atomization method to make coarse alloy powder, first of all, the crude gold melted in the furnace, melted gold liquid shall be superheated about fifty degrees, and then injected into the intermediate package. In the gold liquid injection before the beginning of the start of the high-pressure water pump, so that high-pressure water atomization device to start the workpiece. The gold liquid in the intermediate package through the beam flow, through the bottom of the package leakage into the atomizer. The atomizer is the key equipment for the high-pressure water mist to make the alloy powder of coarse gold, and the good or bad of the atomizer is related to the crushing efficiency of the metal powder. Under the action of high-pressure water from the atomizer, the gold liquid is constantly broken into tiny droplets, which fall into the cooling liquid in the device, and the swift liquid solidifies into alloy powder. In the traditional process of making metal powder by high-pressure water atomization, the metal powder can be collected continuously, but there is a small amount of metal powder lost with the atomized water. In the process of making alloy powder by high-pressure water atomization method, the product of atomization is concentrated in the atomization device, after precipitation, filtration, (drying if needed, usually sent directly to the next process.)
A full set of high-pressure water atomization of the production of alloy powder equipment consists of the following parts:
Smelting part, you can choose the medium-frequency metal melting furnace, you can also choose the high-frequency metal melting furnace, the capacity of the furnace depending on the amount of metal powder to determine the furnace can be used for fifty kilograms of the furnace, or twenty kilograms of the furnace.
Atomization part, this part of the equipment is non-standard equipment, should be based on the manufacturer's site conditions for the design, layout, mainly intermediate package: intermediate package in the winter production, it must be pre-heated; Atomizer: Atomizer will come from the high-pressure pump of high-pressure water at a pre-determined speed and angle of the impact of the gold from the intermediate package of liquid, will be broken into metal droplets. Under the same pump pressure, the amount of fine metal powder after atomization is related to the atomization efficiency of the atomizer; Atomizer cylinder: it is the place for atomization of alloy powder crushing, cooling and collection. Produced alloy powder, in order to prevent the ultra-fine alloy powder in which the loss of water, atomization should be static for a period of time, and then put into the collection of powder box.
After treatment part: powder collection box: used for atomization after the collection of alloy powder, excess water separation and removal; drying furnace: the water-containing wet alloy powder drying; sieving machinery: the alloy powder sieving, out of specification of the coarser alloy powder can be used as a back to the furnace material to dissolve again after atomization.