Study on Dry-Method Volume Expansion Technology for Wet Red Mud Yard

Abstract

The wet red mud yard in Guizhou Branch of CHALCO is closed when it is used up to 1370m altitude, and it’s difficult to construct the new red mud yard within a short term because of the difficulty in land requisition, so, in order to ensure the continuity of alumina production, it’s required to expand the volume of the existing wet red mud yard by dry method, so as to extend its service life. Based on tests and studies on the basic performances of red mud filtration cake, the author in this article gives introductions of technologies on red mud dewatering, transportation, spreading out & stacking, reinforcing of weak red mud layer, recycle of waste water in red mud yard, and flood control & drainage etc. It’s shown by study achievements that good economical and social & environmental benefits can be obtained by using dry-method volume expansion technology for wet red mud yard.