| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for recovering zinc oxide from electric furnace dust by which zinc oxide can be obtained in a non-reduced state, zinc oxide can be more efficiently separated while saving energy, and further added value can be applied to iron oxide. <P>SOLUTION: This method comprises: a step of weighing each prescribed amount of the powder of electric furnace dust and a calcium compound powder, mixing them, pressing the resulting powder mixture and holding the resulting pressed body in the air, in an electric furnace, at 900 to 1,000°C for 60 to 120 hr; a step of cooling the pressed body treated in the electric furnace, pulverizing the pressed body and then dispersing the resulting powder in a liquid; and a step of subjecting the resulting disperse liquid to magnetic separation in a DC magnetic field to recover zinc oxide as a nonmagnetic material. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
