Shi Zhe

Effect of Electrolytic Solution Concentrations on Surface Hydrophilicity of Micro-Arc Oxidation Ceramic Film Based on Ti6Al4V Titanium Alloy

Abstract The present work focuses on the surface of Ti6Al4V titanium alloy to improve its microstructure and hydrophilic property using micro-arc oxidation (MAO) in a mixed electrolyte system with different concentrations of calcium salt and phosphate salt. The morphology, the crystalline structure, the thickness and the hydrophilic property of the MAO film were detected by scanning electron microscopy(SEM), X-ray diffraction(XRD), eddy current thickness meter and electrochemical work station. Results show that the MAO film surface is porous and composed of anatase, rutile and a small amount of hydroxyapatite. The amount of hydroxyapatite phase increases with increasing of potassium dihydrogen phosphate concentration. The thickness of MAO film will not change until it increases to a certain value. The ratio of the surface loose zone to the inner compact zone changes with increasing of the potassium dihydrogen phosphate concentration. The thicker loose layer surface is porous and has the hydroxyapatite phase with more Ca and P, which can improve the hydrophilic property and biological compatibility of MAO ceramic film.

The Experimental of Dephosphorus of Smelting High Phosphorus Iron Ore

Smelting reduction iron making technology will solve the coke shortage and environmental pollution, which has become a major research of. Iron development. By oxygen top-blown high-phosphorus iron ore smelting reduction test, that the use of oxygen top-blown molten high phosphate smelting reduction technology is feasible. From the test results, dephosphorization is more appropriate for the temperature range 1500-1550, the temperature can ¿meet the mobility of iron slag, but also to meet the needs of dephosphorization, With the increase of basicity, lower phosphorus content of hot metal, when the alkalinity of 2.5, the iron content of 0.11% phosphorus, hot metal in the P content increased with increasing concentration of top-blown oxygen showed a rapid decline.

Smelting High Phosphorus Iron Ore by Oxygen Enriched Top-Blown Smelting Reduction

Smelting reduction iron making technology will solve the coke shortage and environmental pollution, which has become a major research of. Iron development. By oxygen top-blown high-phosphorus iron ore smelting reduction test, that the use of oxygen top-blown molten high phosphate smelting reduction technology is feasible, and inappropriate smelting conditions, the iron recovery rate can reach 95%. Reduction in the oxygen top-blown molten smelting reduction process with the temperature increased, the iron yield and the corresponding increase in the rate of metal-based, but with the increased alkalinity of pig iron and metal production rate has dropped, the same time as the reduction time extension of pig iron and metal production rate decreased.