[Mineral beneficiation knowledge] Introduction to the conventional magnetite beneficiation process!

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Magnetite is one of the important raw materials for iron-making. During mineral processing, in order to obtain high-quality magnetite concentrate, the selection of its mineral processing process is very important. Copying or imitation is not advisable as the properties of each magnetite ore are different. The specific choice of which process requires mineral processing testing depends on the properties of the ore.

The following editor will introduce to you the conventional magnetite beneficiation process process , I wish you all to have a preliminary understanding of magnetite mineral processing. The current common magnetite beneficiation processes mainly include: Crushing and screening, Grinding and classification, Separation, Dehydration strong>Several major links.

1. Magnetite crushing and screening process

The magnetite crushing and screening process mainly involves preliminary crushing of the mined raw ore, and then screening to obtain small particle size. mineral. This process often adopts a continuous process of one stage of open circuit crushing and two stages of one closed circuit crushing.

First-stage open-circuit crushing:The raw magnetite ore is fed into the jaw crusher through a vibrating feeder. Coarse crushing, coarse crushing products are sent to two sections and one closed circuit operation by belt conveyor.

Two stages and one closed-circuit crushing: In this operation section, the coarsely crushed products are sent to the cone crusher for fine crushing (crushed to 35mm). After fine crushing, the products are crushed by the two-stage belt The conveyor is sent to the screening machine for screening, and the materials above the screen are returned to one stage of crushing operation to continue coarse crushing, while the materials below the screen are sent to the next site to prepare for grinding and classification.

2. Magnetite grinding and grading process

The grinding and grading process is to dissociate the magnetite and gangue minerals as much as possible to facilitate subsequent separation. Operation. The commonly used process in this stage is stage grinding and classification flow, which is divided into primary grinding and classification and secondary grinding.

First-stage grinding and grading process:After the second-stage screening, qualified products are sent to Grid Type Ball Mill is used for grinding. After the ore is ground to a particle size of less than 15mm, it is pumped to the hydrocyclone through a slurry pump. Within, grading operations are carried out, and the overflow products need to be initially sorted by magnetic separation; while the low-flow products continue to return to the first stage of grinding to continue operations.

Second-stage grinding and classification process: This process is to continue grinding the products after the first-stage grinding and magnetic separation to realize the monomer dissociation of minerals and gangue. After one stage of grinding and magnetic separation, the product is sent to a high-frequency vibrating screen for screening, and the residue is sent to a concentration magnetic separator for secondary separation, and then sent to the second stage of wet overflow ball mill for fine grinding. The oversize material is sent to the tailings pond for storage.

3. Magnetite separation process

Magnetic separation method is mainly used in the magnetite separation stage. In order to improve the grade of magnetite, a three-stage magnetic separation process is often used. After the second stage of grinding, the products are sent to the first stage of magnetic separation by a slurry pump, and the qualified products enter the next stage of magnetic separation, and so on. The unqualified materials return to the upper stage of magnetic separation step by step, and pass through the third stage of magnetic separation. Qualified magnetite concentrate is then obtained.

4. Magnetite concentrate dehydration and filtration process

The magnetite concentrate slurry needs to undergo the next step of dehydration and filtration. The work becomes the finished product. Here, we recommend you to use a disc filter. During the filtration process, magnetite will remain on the filter cloth of the filter. After a period of filtration, a filter cake of a certain thickness will be formed on the filter cloth. The filter cake is scraped off by a scraper and sent to the concentrate warehouse for storage.

The above is an introduction to the specific process of crushing and screening, grinding and classification, magnetic separation and filtration and dehydration in the magnetite beneficiation process. The above process is for reference only, because the design, budget and output of each mineral processing plant are different. Therefore, the mineral processing technology and mineral processing equipment used are different.

Xinhai Mining has more than 20 years of experience in process design and equipment production. It can design suitable mineral processing process plans and complete sets of mineral processing equipment based on the properties of the ore, the conditions of the mineral processing plant, and customer needs. Mineral processing equipment. Xinhai Mining can provide customers with "Mining full industry chain services (EPC+M+O)" services.