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Production Of Iron Powder By Low-Carbon Molten Steel Water Atomization

wallpapers News 2021-01-11
Iron powder is an aggregate of iron particles with a size of less than 1mm. The color is black. It is the main raw material for powder metallurgy.
 
According to the particle size, it is customarily divided into five grades: coarse powder, medium powder, fine powder, fine powder and superfine powder. The iron powder composed of particles in the range of 150~500μm is coarse powder, the particle size is 44~150μm as medium powder, 10~44μm is fine powder, 0.5~10μm is very fine powder, and less than 0.5μm is superfine powder. Generally, the powder that can pass through the 325 mesh standard sieve, that is, the particle size is less than 44μm, is called sub-sieve powder. For higher-precision screening, you can only use air classification equipment, but for some easily oxidized iron powder, you can only use JZDF. Nitrogen protection classifier to do it.
 
Iron powder mainly includes reduced iron powder and atomized iron powder, which are named after different production methods.

 
The iron powder production processes that dominate the iron powder market today are: the Heganus method and the Peron method that belong to the iron oxide reduction process, the water atomization method of low-carbon molten steel, and the ball milling and decarburization of high-purity pig iron shot blasting. Process QMP method and r)omfel%26bull; method. Among them, the production of iron powder by the Heganus method and the water atomization method has an overwhelming advantage.
 
Low-carbon steel liquid water atomization method Low-carbon waste steel is melted and slagging to remove or reduce phosphorus, silicon and other impurity elements, and then flow into the atomizer through the leak nozzle, and at the same time spray high-pressure (about 8.3MPa) water stream to break the metal stream. It forms droplets, and the droplets fall into the tank below to cool and solidify into powder. After the powder is magnetically separated, dehydrated and dried, it is sent to a belt furnace, where it is reduced and annealed by decomposing ammonia gas at 800-1000°C to obtain high-purity water atomized iron powder.

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