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The selection of barite beneficiation equipment is based on its ore beneficiation process, which is determined by the ore type, raw ore properties, etc. Currently, there are four common ore types: sedimentary type, volcanic sedimentation type, hydrothermal type and residual slope accumulation type. The applicable mineral processing methods include: manual separation method, gravity separation method, flotation method and magnetic separation method. The process Basically follow: crushing, screening, grinding and sorting stages. The following editor will introduce the relevant barite beneficiation equipment according to each stage of the process.
The crushing stage is to crush the mined barite ore to achieve the initial dissociation of gangue minerals. Generally, a two-stage crushing process is used: the raw ore is sent to the first-stage crusher by the feeder for coarse crushing, and the crushed products are sent to the second-stage crushing operation by the belt conveyor for fine crushing to meet the selection particle size requirements of subsequent sorting equipment.
Commonly used equipment at this stage include: crusher, feeder
Crusher:One stage of coarse crushing operation can be used Jaw crusher or impact crusher; cone crusher or roller crusher can be used for the second-stage fine crushing operation;
Feeder:According to the ore dressing plant process and mineral processing Depending on the processing conditions of the plant, there are disc feeders, trough feeders, vibrating feeders and plate feeders;
The screening operation is mainly to classify the crushed products so that the mineral particle size reaches better mineral processing indicators. After the second stage of crushing, the minerals are distributed to multiple screening machines for screening, so that different particle sizes can be sent to different separation stages.
Commonly used screening equipment includes: circular vibrating screen, linear vibrating screen and center drive vibrating screen.
Circular vibrating screen: Suitable for screening coarse barite;
Linear vibrating screen: >Suitable for screening fine-grained barite;
Central drive vibrating screen:Suitable for classifying medium- and fine-grained barite.
Grinding often forms the grinding and grading stage with classification, which is to further dissociate barite from gangue ore monomers after screening. In the first stage, a ball mill is used to grind the ore to a selectable particle size to improve the separation efficiency. Commonly used one-stage grinding or two-stage grinding process: After screening, the minerals are sent to the first-stage ball mill for grinding by a belt conveyor, qualified products are sent to the classifier equipment for classification, the overflow product enters the separation stage, and the underflow returns to the ball mill for re-grinding. Or sent to the second stage grinding for fine grinding. After fine grinding, the qualified materials are sent to the cyclone for classification. Commonly used equipment at this stage include: ball mill and classifier.
Ball mill: Overflow ball mill is mostly used in the first-stage grinding process; in the two-stage grinding process, the first stage grinding uses a grid-type ball mill, and the second-stage grinding uses an overflow ball mill. .
Classifier: There are spiral classifiers (high weir type, submersible type) and hydrocyclones (groups), among which the spiral classifier is used in combination with the lattice type, and the hydrocyclone The flow device is used in combination with an overflow ball mill.
The hand selection method is a commonly used method for barite beneficiation, mainly based on The color difference between barite and semi-raw minerals is used to select. This process is usually completed in the crushing stage. During the belt transportation of the crushed ore, a manual manual selection link is set up to select massive barite in advance.
The main equipment is: Belt conveyor.
Gravity separation is based on the density difference between barite and associated minerals. It is mainly suitable for processing residual barite minerals. . After the raw ore is washed, screened, crushed, graded and deslimed, the barite concentrate is selected by gravity separation methods such as jigging, shaking table, spiral classification or heavy media. The equipment that can be applied in this stage includes: jig, shaker, spiral chute and heavy medium cyclone.
Jig :According to the different particle sizes processed by the gravity selection process, there are two types: coarse-grained jig (10-30mm) and fine-grained jig (0-10mm);
Shaking table:When the particle size of barite ore is less than 2mm, a shaking table can be used for sorting, but the mud must be removed with a hydraulic cyclone before sorting to improve the sorting effect;
Spiral chute: When the barite ore particle size is less than 0.6mm and the ore has low mud content, the chute can be used for sorting.
Dense medium cyclone: It can be used to sort barite minerals with a particle size range of 0.5~100mm.
Flotation is sorted through the difference in surface physical and chemical properties of barite and associated ores. It is mainly suitable for processing sedimentary and hydrothermal types. Barite mineral. When the ore enters the grinding operation after coarse crushing, medium crushing, and fine crushing and screening, NaOH will be added to the ball mill to adjust the pH value to 8 to 10, and water glass will be used as an adjuster. The solid concentration will be 40 to 50%. The barite is flotated using oleic acid collector. The equipment used in this stage includes: flotation machine and stirring tank.
Flotation machine: There are XCF type, KYF type, SF type, and JJF type. XCF-KYF can be used in combination to complete rough selection, sweeping and selection operations. JJF -SF type is mostly used for roughing and sweeping operations;
Mixing tank: It has a high-efficiency mixing tank and a chemical mixing tank. The former is used to fully mix the slurry and chemicals, and the latter is Mainly used for the preparation of various pharmaceuticals.
In barite beneficiation, magnetic separation generally does not do the main separation operations, but mainly pre-selection, and is mostly used to remove the presence of sulfur dioxide in barite. Iron oxide mineral impurities.
Commonly used equipment at this stage include: Magnetic drum, permanent magnet magnetic separator, etc.
The above are commonly used mineral processing equipment and auxiliary equipment in barite concentrators. , in the actual mineral processing plant, the specific application of the equipment should be determined according to the actual mineral processing process. Therefore, it is recommended to conduct a mineral processing test first, and through test analysis, design a reasonable mineral processing process and customize suitable barite mineral processing equipment, so as to Improve the separation indicators of mineral processing plants.
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