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首页> 外文期刊>American Journal of Materials Engineering and Technology >Kinetics of Recovery of Alumina from Aluminium Casting Waste through Fusion with Sodium Hydroxide
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Kinetics of Recovery of Alumina from Aluminium Casting Waste through Fusion with Sodium Hydroxide

机译：氢氧化钠熔融从铝铸造废料中回收氧化铝的动力学。

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摘要

Aluminium dross containing 72% Al2O3 and 14.0% SiO2 was fused with NaOH for a period of up to 60 minutes in the temperature range of 500 – 750°C in a stainless steel crucible. The fused mass was dissolved in water. Amount of alumina in the solution was determined by EDTA compleximetric (masking and demasking) chemical method. The optimum condition for alumina extraction was determined as NaOH to aluminium dross weight ratio = 3.5, temperature = 750°C and time 60 minutes. Avrami-Erofeev equation [-ln (1-α) = (k3t) m, m = 3/2] seemed to be most appropriate one to fit the kinetic data of fusion of aluminium dross with NaOH. The activation energy was found to be 6.452kJ/mol.
机译：在不锈钢坩埚中，在500 – 750°C的温度范围内，将含有72％Al2O3和14.0％SiO2的铝渣与NaOH熔融长达60分钟。熔融物溶解在水中。通过EDTA络合（掩蔽和解掩蔽）化学方法确定溶液中氧化铝的量。确定氧化铝提取的最佳条件为NaOH与铝渣的重量比= 3.5，温度= 750°C和时间60分钟。 Avrami-Erofeev方程[-ln（1-α）=（k3t）m，m = 3/2]似乎是最适合铝渣与NaOH熔融动力学数据的方程。发现活化能为6.452kJ / mol。

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