Beneficiation method of low-grade ilmenite

Abstract

The invention provides a beneficiation method of low-grade ilmenite. The beneficiation method includes the following steps: screening and grading raw ore to obtain coarse grain materials and fine grain materials, subjecting the coarse grain materials and fine grain materials to first-stage iron removal respectively to obtain coarse grain iron tailings, fine grain iron tailings and inferior iron ore concentrates, subjecting the coarse grain iron tailings with iron removed to first-stage high intensity magnetic separation to obtain high intensity concentrates and tailings, subjecting the high intensity concentrates to spiral gravity to obtain gravity concentrates and subjecting the gravity concentrates to ore grinding, subjecting the fine grain iron tailings with iron removed to first-stage high intensity magnetic separation and second-stage high intensity magnetic separation sequentially to obtain high intensity magnetic concentrates and mixing the high intensity magnetic concentrates with the gravity concentrates with ore ground to be graded, and subjecting the unqualified graded mixed concentrates to ore grinding and subjecting the qualified mixed concentrates to second-stage iron removal, three-stage high intensity magnetic separation and flotation sequentially to obtain the final ilmenite concentrates. The beneficiation method of ilmenite is applicable to low-grade ilmenite. According to the beneficiation method, the quality of the ilmenite concentrates can be ensured while the recovery of the ilmenite concentrates can be improved, thereby great economic benefit can be obtained.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a new beneficiation method of low-grade ilmenite. Background technique [0002] China's titanium resources rank first in the world, accounting for 40% of the world's reserves, of which more than 90% are in Panxi, Sichuan. The titanium resources in the Panxi area are mainly rock-type vanadium-titanium magnetite, which has a high content of calcium and magnesium, and belongs to ilmenite that is difficult to develop and utilize. At present, mainly for TiO 2 The iron dressing tailings with a content of more than 8wt% are used for the recycling of ilmenite. With the increasing demand for titanium resources, a large number of iron-selected tailings with lower titanium content in this area are urgently to be developed and utilized. Due to the low titanium content of this type of resource, coupled with the complex mineral composition and intercalation relationship, the recovery rate of ilmeni...

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Problems solved by technology

However, with the above process flow for TiO 2 When recovering ilmenite with lower content, TiO 2 The grade can only reach 9% to 12%. Such a low-grade flotation feed is very unfavorable to flotation, which will lead to unsatisfactory grade and recovery rate of the final titanium concentrate, and the cost of flotation reagents is high, which cannot achieve economical efficiency. , The purpose of efficient utilization of low-grade titanium resources

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