抽拉式粉煤灰干式磁选工艺中试研究OA

Fly ash is a waste generated after coal combustion,with a wide range of sources and huge production.Magnetic iron oxides in fly ash can be effectively recovered and reused through magnetic separation.The paper has innovatively developed a pull-out dry magnetic separator and built a pilot platform system for dry magnetic separation of fly ash with a processing capacity of 2 t/h.We investigated the effects of key operating parameters such as discharge interval,wind blade angle,and magnetic rod movement rate on the weight,iron content,and iron recovery rate of the product iron oxide.The results showed that when the unloading interval was 5 minutes and the wind blade angle was 24 °,the highest Fe2O3 content magnetic separation product could be obtained,which was 27.21%;After adjusting the operating parameters,the iron recovery rate can reach 46.49%;When the movement rate of the magnetic rod decreases from 100% to 70%,the iron recovery rate and Fe2O3 content in the product decrease by 7.94% and 5.86%,respectively.This pilot experiment provides theoretical guidance and practical basis for subsequent engineering applications.