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The selection of potash feldspar beneficiation equipment in a mineral processing plant needs to be based on the mineral processing process. The mineral processing process basically includes: crushing, screening, water washing and mud removal, grinding, classification, and separation (including flotation selection, magnetic separation) and dehydration. The editor will introduce you to the relevant potassium feldspar mineral processing equipment according to each stage.
According to the different properties of the ore, the one to three stage crushing process can be used in the potassium feldspar crushing stage. Lump ore is subjected to coarse crushing, medium crushing or fine crushing. Take the three-stage crushing as an example: the raw ore is sent to the first-stage crusher by the feeder for coarse crushing. The crushed products are sent to the screening machine by the 1# belt conveyor for screening. The unqualified materials on the screen are sent by the 2# conveyor. The crushing operation continues in the second stage crushing operation, and the undersized materials enter the third stage crusher for fine crushing. After the second stage crushing, the materials are sent to the third stage crushing operation by the No. 1 conveyor. After being finely crushed in the third stage, they are sent to the vibrating screen for screening. The materials above the screen are returned to the three-stage crusher for further crushing, and the materials below the screen are qualified materials and are sent to the powder ore bin for storage by the 3# conveyor before entering the next stage.
Sometimes, in order to remove iron impurities to the greatest extent, during the transportation process after fine crushing, an iron removal device will be installed to remove the iron-rich particle impurities first, so as to remove impurities as early as possible.
The main potassium feldspar mineral processing equipment used in this stage is: feeder, crusher, conveyor, vibrating screen, electromagnetic iron remover
Feeder:According to the process design, there are several options: trough feeder, electromagnetic vibration feeder and swing feeder;
Crusher:According to the requirements of each crushing stage Different, you can use a jaw crusher for one-stage coarse crushing, a cone crusher for two-stage medium or fine crushing, and a fine jaw crusher or roller crusher for fine crushing;
Conveyor:< /strong>Belt conveyors are commonly used;
Vibrating screens:Circular vibrating screens are often used. Depending on the screening particle size, single-layer sieves or double-layer sieves can be selected; p>
Iron removal device: Generally an electromagnetic iron remover is used.
The main function of water washing and desludge is to remove the clay present in the potassium feldspar ore, < strong>Iron-containing impurities such as fine mud and micacan effectively reduce the Fe2O3 content in the feldspar ore through water washing, and improve the content of the feldspar ore. potassium and sodium content.
The main potassium feldspar mineral processing equipment used in this stage is: vibrating screen, ore washing tank
Vibrating screen:Use a circular vibrating screen and install a pressure spray Water pipes are used for washing and desliming, and can also be used for particle size classification;
Ore washing tank: Specific equipment is used for water washing and desliming.
The potassium feldspar grinding stage often adopts a two-stage grinding process. Qualified materials after crushing and screening are sent to the first stage by a belt conveyor. The ball mill performs coarse grinding, and the ground product is pumped into the classifier by the slurry pump for classification. The underflow returns to the first stage of grinding for regrinding, and the overflow is sent to the second stage of grinding for fine grinding. The process is the same as the first stage, and the second stage grinding and classification The final qualified products enter the selection stage.
The main potassium feldspar mineral processing equipment used in this stage is: ball mill, classifier, slurry pump
Ball Mill:The first stage of coarse grinding uses a grid-type ball mill. The second stage of fine grinding uses an overflow ball mill
Classifier: There are two types: spiral classifier and hydrocyclone. Under normal circumstances, a spiral classifier is used to equip one stage. For coarse grinding and classification, the hydrocyclone is equipped with a two-stage fine grinding and classification, but according to the grinding requirements, the selection needs to be made according to the actual situation;
Slurry pump: Generally used Single-stage slurry pump;
The main function of flotation is to remove mica, silicon, calcium and other impurity minerals in the potassium feldspar ore. Depending on the plant selection situation, a multi-stage selection process is generally adopted. After grinding and grading, the qualified product will be sent to the mixing tank for stirring. When the slurry and chemicals are fully mixed, the flotation machine will suck the slurry on its own or be fed into the slurry by a pump for step-by-step flotation.
The main potassium feldspar mineral processing equipment used in this stage is: flotation machine, mixing tank, slurry pump
Flotation machine: There is XCF type , KYF type, SF type, JJF type, can be designed into horizontal configuration operation and ladder configuration operation according to flotation conditions. The former does not require slurry pump to lift, which can reduce the investment of lifting pump and infrastructure investment;
XCF/KYF type: The XCF flotation machine is used as a straight chute, and the KYF type flotation machine is used as a slurry suction tank, which is mostly used for roughing and sweeping operations in feldspar ore beneficiation;
JJF type/SF type: The SF type flotation machine is used as a suction tank, and the JJF type flotation machine is used as a straight chute. They are generally used for sweeping in medium and large feldspar ore concentrators. and featured assignments.
Mixing tank: The high-efficiency mixing tank is used to mix medicine and slurry. However, if mixed medicines are used, the different medicines must be fully mixed with the medicine mixing tank first.
Since iron is the main impurity mineral in potassium feldspar, and magnetic separation is the main method of iron selection or iron removal, potassium feldspar mineral separation Magnetic separation is essential and is mainly used to remove magnetic minerals such as iron, mica and garnet present in potassium feldspar. However, iron, mica, etc. have weak magnetism, so weak magnetic separation methods are often used to remove impurities. Depending on the properties of the ore, magnetic separation can be used to remove impurities during grinding ore grinding, and can also be used for further impurity removal operations after flotation of the concentrate.
The main potassium feldspar beneficiation equipment used in this stage is: magnetic separator
Magnetic separator:There are permanent magnet roller type strong magnetic separators, permanent magnet drum type medium and strong magnetic field magnetic separators, pulsating high gradient magnetic separators, magnetic drums and dry magnetic separators, etc.
Potassium feldspar dehydration equipment can be divided into two categories, one is concentrate dehydration and the other is tailings dehydration, according to their dehydration requirements , commonly used are concentrated There are several types of machines, dewatering screens, cyclones, filter presses and filters.
Concentrator: Suitable for concentrate/tailings dehydration. One more stage of dehydration is done in the concentrate and two stages of dehydration are done in the tailings. The low flow concentration is 60~70%;
Dehydration screen: Mostly used for tailings dehydration, used in three-stage dehydration operations to make the final moisture content of the tailings between 12 and 15%;
Cyclone flow Filter:Used in the first stage of dewatering in tailings dewatering, the low flow moisture content is 40~30%;
Filter press/filter:Can be used Dehydration of concentrate/tailings is mostly used in the final stage. The moisture content of the slurry is lower than 9~12%.
The above are the types of equipment commonly used in potassium feldspar concentrators. In actual beneficiation, the beneficiation process should be determined first, and then the beneficiation equipment should be designed according to each link of the process. The common process flow is as follows:
Pegmatite feldspar:The process mostly adopts crushing-grading process;
Weathered granite feldspar: The process of crushing-grinding-flotation (removal of iron and mica)/flotation (separation of feldspar and quartz) is often used;
Aplite feldspar:The crushing-grinding-screening-magnetic separation process is often used;
Feldspathic placer:Water washing and mud removal-screening (or flotation separation of quartz) process .
Editor’s suggestion: There are no identical feldspar mines in the world, so mineral processing tests need to be conducted. Through test analysis, a reasonable feldspar mineral processing process and construction plan for the mineral processing plant can be designed. , and customize a complete set of feldspar ore beneficiation equipment to obtain an ideal return on investment.
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