Recovering method for ultra-fine-grain ilmenite in inclined plate thickener overflow

Abstract

The invention discloses a recovering method for ultra-fine-grain ilmenite in an inclined plate thickener overflow. Re-concentration is carried out on the inclined plate thickener overflow; then high-gradient magnetic separation is carried out; magnetic separation rough concentrate is adjusted to a proper flotation concentration for flotation desulfurization; and then after sulfuric acid, a combined inhibitor, and a composite collecting agent are sequentially added, roughing is carried out once, roughing bubbles are subjected to selection for three times, ore pulp in a roughing groove is subjected to scavenging once, the ore is sequentially returned to the previous operations in the selection process, and the bubbles are sequentially returned to the previous operations in the scavenging process. The recovery rate in the flotation operation is greater than 45%, and the grade of the titanium concentrate is 44%-47%.

Description

technical field [0001] The invention relates to a method for recovering ultrafine ilmenite in the overflow of an inclined plate thickener, belonging to the field of mineral processing engineering. Background technique [0002] my country's Panxi region is rich in vanadium-titanium magnetite resources, with proven reserves of 9.3×10 9 t, the ore contains more than ten beneficial components such as iron, vanadium, titanium, cobalt, nickel, copper, gallium, etc., among which the reserves of titanium resources account for more than 90% of the reserves of titanium resources in my country, and the comprehensive utilization value is extremely high. The main industrial minerals in the ore are titanomagnetite and ilmenite, which are the main raw materials for extracting iron and titanium respectively. At present, the overall technological process of selecting iron first and then titanium has been formed, that is, using weak magnetic separation to obtain iron concentrate with an iron...

AI Technical Summary

Problems solved by technology

Production practice shows that the existing "strong magnetic separation + flotation" combined process and reagent system in the Panxi area has a good recovery effect on +38μm ilmenite, while -38μm ilmenite The ore recovery effect is not ideal, and the efficient utilization of resources cannot be realized; at the same time, this part of -38μm ultra-fine-grained ilmenite entering the coarse-grained flotation system will also deteriorate the flotation index of the coarse-grained grade, and the fine-grained titanium The recovery of iron ore has become a recognized problem in the titanium beneficiation industry

Therefore, inclined plate thickeners are usually used in production to concentrate and classify the magnetic separation concentrate, the underflow of the thickener (coarse-grained ilmenite) is used for flotation, and the overflow of the thickener (containing ultrafine-grained ilmenite) ) directly discarded into the tailings, which caused a large loss of titanium resources

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