Ore dressing technology for treating vanadium titano-magnetite

Abstract

The invention relates to an ore dressing technology for treating vanadium titano-magnetite. The technology comprises the following steps of: feeding crushed raw ore into a ball mill in a primary milling and grading closed path, and feeding primary graded overflow containing 40 to 50 percent of milled powder with the granularity of 200 meshes into a rough magnetic separator, wherein tailings in the rough magnetic separator are final tailings; demagnetizing the concentrate in the rough magnetic separator, then feeding for secondary grading, feeding secondary graded return sand into a secondary ball mill, returning the discharged ore in the secondary ball mill for grading, and feeding secondary graded overflow containing 65 to 95 percent of milled powder with the granularity of 200 meshes into a magnetic separator, wherein the tailings in the magnetic separator are final tailings; and demagnetizing the concentrate in the magnetic separator, then feeding into a high-frequency vibrating mesh fine screen, returning the ore on the high-frequency vibrating mesh fine screen to the ball mill, feeding the powder below the fine screen into a magnetic separation column, and returning middling in the magnetic separation column for secondary grading, wherein the concentrate in the magnetic separation column is used as final concentrate. The technology has the advantages of effectively improving the grade and the recovery rate of the vanadium titano-magnetite, reducing the ore dressing energy consumption, improving the utilization rate of resources and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of iron ore separation, and in particular relates to a mineral separation process for processing vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite is a solid solution isolate with magnetite as the main body, and the main elements are iron, titanium and vanadium. Compared with single magnetite, vanadium-titanium magnetite is a ferrimagnetic ore with larger remanence and high coercive force, which has exceeded the current magnetic data of domestic iron ore. The greater the strength of the applied external magnetic field, the greater the remanence and coercive force. Under the action of an external magnetic field, as the intensity of the external magnetic field increases, the magnetization increases proportionally. Taking Panzhihua vanadium-titanium magnetite as an example, under the external magnetic field of 63.66KA / m, it has reached 50% of the saturation magnetization. ...

AI Technical Summary

Problems solved by technology

The second-stage grinding and grading operation of this process has disadvantages such as poor classification effect, large fluctuations in concentration, poor second-stage grinding effect, and large screening operation processing capacity; while Panzhihua vanadium-titanium magnetite has a relatively large coercive force , it is easy to form non-magnetic inclusions and other problems in the process of magnetic separation

These problems lead to small secondary grinding capacity, poor grinding and grading effect, and low grades of coarse and fine particles in the final concentrate, resulting in low final concentrate grade, low recovery rate, and high energy consumption for beneficiation. and waste of resources

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