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首页> 外文会议>EPD congress;TMS annual meeting exhibition >EFFECTS OF ULTRASOUND ON Al_2O_3 EXTRACTION RATE DURING ACID LEACHING PROCESS OF COAL FLY ASH
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EFFECTS OF ULTRASOUND ON Al_2O_3 EXTRACTION RATE DURING ACID LEACHING PROCESS OF COAL FLY ASH

机译：粉煤灰酸浸过程中超声对Al_2O_3萃取速率的影响

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Coal fly-ash(CFA) from thermal power plants is rich in Al_2O_3, which has great potential as an alternative resource for alumina production. In this work, Al_2O_3 contained in the coal fly-ash was extracted using an acid sintering-leaching process. This process was enhanced by aid of power ultrasound during the leaching. The recovery rate of Al_2O_3 was increased with ultrasound, compared with the similar process without ultrasound under the identical operation conditions. Leaching temperature can be lowered by about 10-15°C and the processing time reduced by about 50%. The process kinetics were investigated in details for a better understanding of the fundamentals on the effects of power ultrasound. The obtained results demonstrate the potential application in reducing processing energy and increasing production rate.
机译：来自火力发电厂的煤粉煤灰（CFA）富含Al_2O_3，具有作为氧化铝生产替代资源的巨大潜力。在这项工作中，煤粉煤灰中所含的Al_2O_3是通过酸烧结-浸出工艺提取的。在浸出过程中借助功率超声增强了该过程。与在相同操作条件下不使用超声波的类似工艺相比，使用超声波可以提高Al_2O_3的回收率。浸出温度可降低约10-15°C，处理时间减少约50％。对过程动力学进行了详细研究，以更好地了解功率超声效应的基本原理。获得的结果证明了在减少加工能量和提高生产率方面的潜在应用。

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