Non-flotation mineral processing method for magnetite-hematite mixed iron ore

Abstract

The invention discloses a non-flotation mineral processing method for magnetite-hematite mixed iron ore. The process adopted is as follows: carrying out first-stage grinding on magnetite-hematite mixed iron ore, and carrying out low-intensity magnetic rough separation and low-intensity magnetic fine selection on the first-stage grinding product to obtain low-intensity magnetic separation iron concentrate C1; carrying out primary high-intensity magnetic separation on the low-intensity magnetic rough separation tailings, discharging primary high-intensity magnetic separation concentrate, and discarding primary high-intensity magnetic separation tailings T1; combining the primary high-intensity magnetic separation concentrate and the low-intensity magnetic fine separation tailings, carrying out spiral chute gravity separation, discharging spiral chute gravity separation tailings, and obtaining spiral chute gravity separation iron concentrate C2; and carrying out second-stage grinding on the spiral chute gravity separation tailings, carrying out secondary high-intensity magnetic separation on the second-stage grinding product to obtain secondary high-intensity magnetic separation ironconcentrate C3, and discarding secondary high-intensity magnetic separation tailings T2. The non-flotation mineral processing method for magnetite-hematite mixed iron ore has the advantages of high recovery rate of iron concentrate, less second-stage regrinding, energy saving and consumption reducing, environment friendliness, simple process flow and structure, stable index, easy on-site operationand management, and the like.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to a beneficiation method of magnetic-red mixed iron ore, which is especially suitable for TFe in the range of 34.5% to 41.5%, and the ratio of magnetite to red (brown) iron ore in the range of 1.1 to 1.1. Between 1.8, gangue minerals are SiO 2 It is a non-flotation ore purification method for magnetic-red mixed iron ore. Background technique [0002] Common magnetic-red mixed iron ore beneficiation process mainly adopts stage grinding-weak magnetic field-strong magnetic field-anion reverse flotation; stage grinding, coarse and fine separation, gravity separation-magnetic separation-anion reverse flotation; stage grinding Mining, coarse and fine separation, magnetic separation-gravity separation-anion reverse flotation process. [0003] It can be seen that anion reverse flotation is almost indispensable in the existing magnetic-erythroic mixed iron ore b...

AI Technical Summary

Problems solved by technology

The above mineral processing method processes the fine-grained magnetic hematite mixed iron ore, so that the recovery rate of the iron concentrate is higher and the grade is higher, but there are also problems such as fine grinding particle size, long process flow, high energy consumption, and the need to add a large amount of flotation reagents. And other issues

[0004] The flotation process needs to add beneficiation agents - collectors, inhibitors, foaming agents, pH regulators, etc., which not only pollute the environment, but also cause harm to the health of workers

Therefore, when domestic enterprises "go out" to develop and utilize foreign mineral resources, due to the strict environmental protection requirements of foreign countries, flotation processes are often not allowed to be used to avoid the pollution of the local environment by adding flotation agents, leading domestic enterprises to foreign magnetic- The development and utilization of red mixed iron ore resources are restricted

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