Of these three hematite beneficiation process options, which one is suitable for your dressing plant?

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Although hematite is a weakly magnetic iron mineral, it is an important resource for obtaining iron. In terms of mineral processing, according to the properties of hematite ore, magnetic separation, flotation, gravity separation and magnetization roasting can be used. Hematite is sorted equally, but due to the fact that in the actual process, the thickness of some hematite and impurity minerals is uneven, and it also contains a small amount of magnetite, quartz, kaolin and other gangue minerals, the ore properties are more complex.

Therefore, among the above methods during separation, the ideal hematite concentrate cannot be obtained by using a single method, and a joint beneficiation plan must be used for separation. Currently, Hematite combined beneficiation processThere are mainly three processes:

1. Continuous grinding of hematite - weak magnetism - strong magnetism - anion reverse flotation Process of beneficiation

This process is mainly suitable for processing hematite ore with finer particle size. The grinding requires fine particle size. Continuous grinding is required to completely separate the hematite monomer and then proceed. Select the assignment.

After continuous grinding, the weak magnetic separation-strong magnetic separation process is used to remove the original slime and The secondary sludge is removed, a large amount of tailings is thrown away, and then a reverse flotation process is performed to separate hematite concentrate.

This hematite beneficiation process can easily obtain better separation indicators. At present, strong magnetic operation equipment is the ideal choice for hematite tailing equipment, and anion reverse flotation is the ideal hematite beneficiation operation to obtain high-grade iron concentrate.

2. Hematite stage grinding-coarse and fine separation-gravity-magnetic-anion reverse flotation process

This process has strong pertinence. The mineral is grinding The dissociation is in a random state during the process. Minerals that have reached monomer dissociation under rough grinding conditions should be sorted as soon as possible.

The process is mainly that the raw ore enters the hydrocyclone for classification after primary grinding, and the coarse-grained grade obtained The hematite is gravity separated using a spiral chute to obtain coarse-grained hematite concentrate; the fine-grained hematite enters the weak magnetic-strong magnetic-reverse flotation process to obtain high-grade fine-grained hematite concentrate.

3. Hematite stage grinding-coarse and fine separation-magnetic-gravity-anion reverse flotation process

This process is first used after completing the coarse particle separation. Strong magnetic separation is used for pre-tailing, and then gravity selection and reverse flotation operations are performed. The amount of strong magnetic pre-throwing tailings can generally be more than 45%, which greatly reduces the amount of ore dressing in subsequent operations and saves subsequent sorting equipment. At the same time, after high-magnetic pre-tailing, the ore entering the subsequent high-magnetic operation has a higher grade, which is conducive to the gravity separation operation to improve the concentrate grade.

However, relatively coarse and poor conjoined organisms will also enter the strong magnetic concentrate, which will intensify the subsequent classification. The anti-enrichment effect of the cyclone increases the difficulty of the anti-flotation operation.

The above is the common beneficiation process of this type of hematite. As mentioned above, this type of hematite and impurities are embedded with uneven particle sizes and have a large content of fine particles. The nature of the ore is complex. It is recommended that you must tailor a process that suits you through mineral processing tests, and remember not to apply it randomly.