CAJ | 학술논문

针对传统稀土萃取混合澄清槽存在的问题，提出了在澄清室增加搅拌装置以提高澄清效率的方法。通过对四斜叶搅拌桨、Intermig桨及框式搅拌桨等不同桨型搅拌对澄清度影响的研究，证实四斜叶桨是合适的桨型，经搅拌之后，澄清室两相分离效果明显优于传统混合澄清槽，澄清度平均提高30%以上。在转速20，30，40和50 r·min-1条件下，搅拌桨离底距离分别为4.0，5.5，7.0，8.5和10.0 cm，搅拌桨距溢流口距离分别为10，13和16 cm时，对四斜叶桨搅拌澄清度的研究结果表明，低转速下澄清效果更好，搅拌桨距离溢流口越近澄清效果越好，而搅拌桨离底距离8.5 cm，即处于两相混合带附近时澄清效果最佳。在此基础上，根据因次分析原理和试验数据建立了澄清度因次公式。
침대전통희토췌취혼합징청조존재적문제，제출료재징청실증가교반장치이제고징청효솔적방법。통과대사사협교반장、Intermig장급광식교반장등불동장형교반대징청도영향적연구，증실사사협장시합괄적장형，경교반지후，징청실량상분리효과명현우우전통혼합징청조，징청도평균제고30%이상。재전속20，30，40화50 r·min-1조건하，교반장리저거리분별위4.0，5.5，7.0，8.5화10.0 cm，교반장거일류구거리분별위10，13화16 cm시，대사사협장교반징청도적연구결과표명，저전속하징청효과경호，교반장거리일류구월근징청효과월호，이교반장리저거리8.5 cm，즉처우량상혼합대부근시징청효과최가。재차기출상，근거인차분석원리화시험수거건립료징청도인차공식。
Addition of agitation device to mixer-settlers was proposed in order to improve separation efficiency. A four-pitched-blade turbine, an Intermig impeller and a frame impeller were selected. Experimental conditions were: rotation speed:20, 30, 40 and 50 r?min-1, impeller to bottom distance: 4.0, 5.5, 7.0, 8.5 and 10.0 cm and the distance from paddle to overflow port: 10, 13 and 16 cm. The results show that the pitched blade turbine is applicable and the two-phase separation process is better in the settlers with agitation than in traditional mixer-settlers without agitation. The results show that the separation efficiency is better when the rotation speed is lower and the distance from paddle to overflow port is narrower. When the impeller to bottom distance is 8.5 cm, the separation efficiency is the best. A principle theory formula in the range of the experimental condition is established. The theoretical values have a good agreement with the experimental values.