Ilmenite beneficiation process

Ilmenite gravity separation method

This method is mostly suitable for coarse-grained and fine-grained aggregate-dyed ilmenite. After coarse and medium crushing, it can be processed through gravity separation equipment. Such as spiral chute, shaking table, etc., discarding a large amount of gangue and desludge.

Ilmenite Magnetic Separation Method

Ilmenite is a weakly magnetic mineral, and its specific magnetization coefficient and density are higher than those of gangue minerals. For minerals of the same particle size , which has a much larger volume magnetization than gangue minerals. In this way, during magnetic separation under a certain field strength (electric field strength and direction), the gangue minerals and part of the fine-grained iron-containing silicate minerals in the ilmenite are easily thrown into the tailings, and can be removed through strong magnetic separation. It can effectively separate ilmenite and gangue minerals to achieve the purpose of enriching titanium metal and can process ilmenite that is difficult to enrich by gravity separation. It is often used in selection, tailing and other links.

Ilmenite flotation method

As a sorting method with high sorting accuracy and good sorting effect, flotation is mainly used in primary titanium ore beneficiation or fine separation. The separation process of particle size ilmenite includes conventional flotation, flocculation flotation, agglomeration flotation, etc.

1. Conventional flotation method

Commonly used collectors include oleic acid and its soaps, oxidized paraffin soap, tar oil and new collectors, such as TAO, R -2, H1717, ZY, RST, TOB, etc. Among them, oleic acid and its soaps are commonly used ilmenite collectors. The technology is mature and reliable. Its collection performance can be improved by raising the temperature, increasing the oxygen content, or adding emulsifiers. The disadvantages are large chemical consumption and Poor selectivity. Oxidized paraffin soap is a product of oxidized and saponified paraffin wax. It has wide sources and low cost. It can replace oleic acid. It needs to be emulsified at room temperature to improve its collection effect. The concentrate has low grade and unstable grade.

2. Flocculation and Flotation Method

Flocculation and flotation mainly include selective flocculation method and hydrophobic flocculation method. Selective flocculation is a method of coagulating and flocculating one mineral from a dispersed system of two or more minerals. Hydrophobic flocculation refers to the phenomenon that hydrophobic particles suspended in water attract each other and form clumps due to their hydrophobic interaction. Hydrophobic flocculation is achieved by adding collectors and neutral oil under high-speed stirring. Ilmenite flocculation and flotation is a flotation technology that selectively flocculates fine-grained ilmenite by adding flocculants such as polyacrylamide to form floccules.

3. Agglomeration flotation method

Ilmenite agglomeration flotation uses a collector adsorbed on the surface of ilmenite to make it hydrophobic, and uses the capillary attraction of the liquid bridge to make the ore particles A technology that allows the agglomeration to float and separate as a whole. Strong stirring is very important during the agglomeration and flotation process. Strong stirring can give the particles more energy, overcome the energy barrier between the ore particles, make the surface of the ore particles hydrophobic and trigger flocculation into agglomerates, ultimately achieving the purpose of ilmenite beneficiation.

Ilmenite electroseparation method

The electroseparation method is mainly used to process the crude concentrate containing non-conductive impurities such as titanium pyroxene produced by gravity separation and magnetic separation. Ore is widely used in the selection process. The electro-selection method has requirements for the particle size of ilmenite, with a lower limit of 0.04mm. Pre-treatment such as heating and radiation irradiation is required before electro-selection. This is to ensure the normal progress of the electro-selection process. Avoid unnecessary situations and improve the efficiency of mineral processing technology.

Ilmenite combined separation method

Common ilmenite combined separation methods include: magnetic separation-flotation, gravity separation-flotation, magnetic separation-gravity separation, Gravity separation-magnetic separation-flotation-electric separation, etc.

Magnetic separation-flotation combined method:The recovery method of fine particle size of ilmenite has always been the focus and difficulty. Flotation can basically achieve -0.02mm particle size of ilmenite. The recovery of ore, but a large amount of quartz and other gangue will affect the flotation index, for which strong magnetic pre-throwing can be used to improve the flotation environment.

Gravity separation-flotation combined method: It uses spiral chute, shaking table and other gravity separation equipment to carry out rough selection and selection to obtain qualified rough concentrate, which is then flotation Through selective desulfurization, titanium concentrate and sulfur concentrate can finally be obtained to achieve comprehensive utilization of mineral resources.

Magnetic separation-gravity combined method:Although sand titanium ore can be enriched by simple gravity separation or magnetic separation, the combined magnetic separation-gravity separation method can obtain better results. indicators while reducing costs.

Gravity separation-magnetic separation-flotation-electroseparation combined method:It is mainly used to select minerals whose gangues in raw ores are mainly titanium pyroxene and plagioclase. Gravity separation removes plagioclase, flotation desulfurization, and electroselection removes titanium pyroxene.