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Separation of ultrafine ceria-based abrasive particles from glass polishing powder waste through liquid–liquid–powder extraction
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2018-09-18 , DOI: 10.1016/j.seppur.2018.09.047
Li Pang Wang , Yan Jhang Chen , Yu Hua Jiang , Yun Chen Tso

Glass polishing powder waste comprises ultrafine particles of ceria-based abrasive and polished glass powder. This study investigated the separation of ceria-based abrasive particles from glass polishing powder waste through liquid–liquid–powder extraction. Kerosene was used as the oil phase, and sodium oleate (NaOL) was used as the surfactant collector. First, the properties of the ceria-based abrasive/glass powder particles transferred from the water phase to the kerosene phase and the effect of surfactant collector addition were investigated individually. Then, separation of ceria-based abrasive from an artificial particle mixture of ceria-based abrasive and glass powder was carried out to determine the optimal extraction conditions. Finally, the method was applied to a glass polishing powder waste.

The results indicated that with the addition of 2 kg/ton NaOL, more than 90% of the ceria-based abrasive particles were extracted from the water phase to the kerosene phase at a pH of 5–9. The pH and NaOL addition had negligible effect on the extracted fraction of the glass powder, which remained at approximately 10–15%. The optimal extraction conditions for the separation of ceria-based abrasive from an artificial particle mixture of ceria-based abrasive and glass powder were obtained at pH 7. Both the grade and recovery of the ceria-based abrasive in the kerosene phase solid were higher than 90% when more than 5 kg/ton NaOL was added. With the addition of 10 kg/ton NaOL, the grade was 98.5% and recovery was 97.1%. Similar results were obtained after applying this technique to a glass polishing powder waste.



中文翻译:

通过液-液-粉萃取从玻璃抛光粉废料中分离超细二氧化铈基磨料颗粒

玻璃抛光粉废料包含二氧化铈基磨料和抛光玻璃粉的超细颗粒。这项研究研究了通过液-液-粉萃取从玻璃抛光粉废料中分离二氧化铈基磨料颗粒的方法。煤油用作油相,油酸钠(NaOL)用作表面活性剂收集剂。首先,分别研究了从水相转移至煤油相的二氧化铈类磨料/玻璃粉末的性质以及表面活性剂捕集剂的添加效果。然后,将二氧化铈基磨料与二氧化铈基磨料和玻璃粉的人工颗粒混合物分离,以确定最佳的提取条件。最后,将该方法应用于玻璃抛光粉废料。

结果表明,添加2 kg /吨NaOL时,在pH值为5–9时,超过90%的二氧化铈基磨料颗粒从水相萃取到煤油相。pH和NaOL的添加对玻璃粉提取部分的影响可忽略不计,该部分保持在大约10–15%。在pH 7下获得了从二氧化铈基磨料和玻璃粉的人工颗粒混合物中分离二氧化铈基磨料的最佳萃取条件。当添加超过5千克/吨的NaOL时为90%。添加10千克/吨NaOL后,品位为98.5%,回收率为97.1%。将这种技术应用于玻璃抛光粉废料后,可获得类似的结果。

更新日期:2018-09-18
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