Method and system for concentrating and separating two segments of low-intensity magnetic separation iron tailings to obtain ilmenite

Abstract

The invention discloses a method for concentrating and separating two segments of low-intensity magnetic separation iron tailings to obtain ilmenite and a corresponding separation system. The method comprises the following steps: concentrating a first segment of low-intensity magnetic separation iron tailings by using a first sloping-plate thickener (10), and thus obtaining first overflow and first underflow as a coarse ilmenite raw material; mixing the first overflow with a second segment of low-intensity magnetic separation iron tailings, then feeding the mixture into a second sloping-plate thickener (20) for concentration, and thus obtaining second underflow as a fine ilmenite raw material and second overflow as slurry. The concentrations of the first underflow and the second underflow are increased, the particle size separation effect of the first underflow and the second underflow is better, and the phenomenon of coarse particle overflowing of the first overflow and the second overflow is decreased.

Description

Technical field [0001] The invention relates to ore dressing technology, in particular to a method for concentrating and separating ilmenite by two-stage weak magnetic separation of iron tailings and a corresponding system. Background technique [0002] Ilmenite is a titanium-containing mineral with high utilization value in magmatic vanadium-titanium magnetite. For ilmenite beneficiation, strong magnetic separation, flotation, gravity separation and other beneficiation methods can be used, but each beneficiation method must be suitable Selected particle size and concentration. Vanadium-titanium magnetite is usually beneficiated by selecting iron first and then titanium, so the particle size and concentration of raw materials selected in the titanium beneficiation process are mainly determined by the iron beneficiation process. At present, in order to achieve higher concentrate quality in the vanadium-titanium magnetite iron separation process, a two-stage grinding-weak magnetic...

AI Technical Summary

Problems solved by technology

In this technical scheme, there are problems such as low classification efficiency and heavy workload. For example, the underflow concentration of the first-stage slanted plate thickener is still low (about 25%), and the phenomenon of overflow coarsening (that is, large-sized particles from the overflow flow out) is serious, low concentration of underflow makes the recovery rate of subsequent titanium concentrate decrease, and the overflow and roughness make the classification effect not good, which also causes the recovery rate of subsequent titanium concentrate to decrease

Images