Papers by Keyword: Water Atomization

Abstract: This paper reports the complete setup of water atomisation machine designed to manufacture aluminium powder out of discarded aluminium metal in Nigeria. It is a study that evaluates the country’s dependence on imported aluminum powder and the economic effect its has on the country. The specially designed atomizers with high-pressure water supply, atomising nozzles, and tanks turn discarded aluminum scrap into powder in 45 seconds. The studies consist of iterative design optimization and parameter tuning, 82% conversion and aluminium powder manufactured with desired properties.Finite element analysis (FEA) checks the structure for integrity at high pressures; and computational fluid dynamics (CFD) analysis explains thermal dynamics. The results are positive for the domestic aluminum market as it offers a long-term and affordable alternative for aluminum powder production.

Abstract: The color of water atomized steel shots changes upon processing and heat treatments due to the compound formation on the steel shot surface. In this study, color change is studied at each step of the water atomized steel shots and for size variation using various microscopic techniques such as OM, SEM, TEM and spectroscopic techniques such as AES and XPS. The results show that the color of the shot balls changes due to the formation of FeOOH, Fe_xO_y, etc. depending on the heat treatment and natural oxidation upon exposure to the environment, whose thicknesses also depend on the severity of processing and heat treatment for the compound formation.

Abstract: In this paper, the influence factors on high compressibility water atomized iron powder LAP100.29 were studied such as the processing parameters, the proportion of coarse particles, powder oxygen content and impurity. The results showed that, by increasing the purity of molten steel and improving atomization temperature, the iron content of water atomized iron powder particles reached more than 99.67 %, the oxygen content was less than 0.08 %, acid insoluble was less than 0.08 %, green density reached 7.21~7.22 g/cm³. The contents of +80 and -80～+100 mesh powder were 1.6 % and 7.5 %, respectively. The compressibility could be improved by the increase of the coarse particles and the reduction of the fine particles (for example, lowering the content of -325 mesh particles). Generally speaking, the compressibility of the water atomized iron powder can be improved fundamentally by reducing oxygen content, impurity content and the reasonable distribution of particle size.

Abstract: This paper presented characterization of spray velocity and angle of spray nozzle systems for cosmetic products. Diameter and length of nozzle orifice were chosen as shape factors of the spray system. Combinations of the factors were determined by using Central Composite Design. Fluid analysis was conducted by using Fluent to obtain spray angle and velocity. RSM (Response Surface Method) was used to approximate the relationship between these 2 factors and spray characteristics. To evaluate the proposed method, experimental work with existing was conducted and good agreement between simulation and experimental results.

Abstract: This paper described the preparation method for composing high-grade synthetic diamond by water atomizing using FeNi30 powder catalyst.The FeNi30 powder was corroded by the 100Mpa super high-pressure water atomizing technique and selecting organic RY corrosion inhibitor. Contrast test of the original FeNi30 powder and the treated FeNi30 powder on synthetic diamonds were conducted under super high-temperature and high-pressure using cubic press. The result shows that after the FeNi30 powder was corroded,the FeO phase and Fe3O4 phase could not longer be found by X-Ray analysis.Furthermore,the oxygen content of the powder increased up to 100PPM under the natural condition for one year. After the powder was mixed with graphite powder, diamond could be made by isostatic pressing method. Its color became darker and its TTI value increased slightly. However, its penetrability was still different from the high-grade synthetic diamond made by gas atomizing FeNi30 powder catalyst.