Method for oxygen-enriched calcification calcination of high-grade vanadium slag

Abstract

The invention discloses a method for oxygen-enriched calcification calcination of high-grade vanadium slag. The method comprises the following steps of mixing high-grade vanadium slag and a calcification agent to obtain a mixture and carrying out calcination of the mixture in an atmosphere having oxygen volume content of 12 to 21%. The method for oxygen-enriched calcification calcination of high-grade vanadium slag greatly reduces a calcification calcination temperature of high-grade vanadium slag, solves the problem that in calcification calcination of high-grade vanadium slag, abnormal running problems such as material agglomeration and calcination equipment ring-forming are caused by a high calcination temperature, and improves an industrialization technology of calcification calcination of high-grade vanadium slag.

Description

technical field

[0001] The invention relates to a method for calcifying and roasting vanadium slag, which belongs to the field of extracting vanadium oxide. Background technique

[0002] The current high-grade vanadium slag roasting technology, whether it is calcification roasting or sodium roasting, has high roasting temperature, and the material produces a large amount of liquid phase during the roasting process, resulting in sintering of the material, ring formation in the rotary kiln or sticking of rake teeth in the multi-hearth furnace. and stacking issues. In order to solve the problem that the roasting equipment cannot operate normally due to too much liquid phase in the roasting process of high-grade vanadium slag, the V 2 o 5 The mass content is controlled at 8-9%. This method usually increases the material handling capacity of the roasting equipment by 70-80%. However, the calcification roasting process is currently only carried out by Panzhihua Iron and Steel Co...