Purification is one of the essential contents of deep processing of kaolin clay. With the decreasing amount of high-quality resources and the increasing demand for kaolin in high-tech applications, mineral processing, and purification are becoming increasingly important in the deep processing of kaolin. The beneficiation method of kaolin depends on the removed impurities type from the raw ore, their occurrence state, embedded particle size, and the required product quality standards. For kaolin with high magazine content, low whiteness, and high content of sandy and iron minerals, it will adopt comprehensive methods such as gravity separation (sand removal), strong magnetic separation, or high gradient magnetic separation (iron and titanium minerals removal), chemical bleaching, flotation, etc. Before building a complete kaolin processing plant, it will conduct a mineral experiment, so what equipment will used in the kaolin purification testing?
Lab Kaolin Purification Equipment
Kaolin cleaning process equipment: spiral sand washing machine, hrocyclone, slurry magnetic separator, kaolin with silica sand material goes to ball mill, after grading and desliming, flotation machine for mica removal, and then goes to high gradient magnetic separation for purification.
1. Spiral sand washing machine (kaolin)
It is generally inclined when installing a spiral sand washing machine. When it is working, the screw starts to rotate under the action of the electric motor. The sand and gravel enter the cleaning tank from the feeding port, flip and collide with each other under the drive of the screw, and then exit the impurities on the surface of the sand and gravel, breaking the water vapor layer that covers the sand particles to facilitate dehydration. Under the drive of the screw and the action of its gravity, the sand and gravel move from high to low, clean sand and gravel enter the discharge chute through rotation, completing the cleaning function of the sand and gravel. It is suitable for cleaning, desilting, and grading various types of sand mines, such as sand and gravel yards, concrete sand making, dry powder mortar, machine-made sand, power plant desulfurization, quartz sand, etc.
Purpose: Clean raw ore materials.
Process: Put the kaolin into the sand washing machine, which will arrange at a 15 ° angle. The lower part of the water tank is surrounded by three pieces of-sided weir plates to form a sedimentation tank. The spiral head will submerge in the sedimentation tank, and the spiral driven by an electric motor through a reducer to rotate continuously. The cleaning water feeds into the porous plate at the bottom of the sedimentation tank. By utilizing the principle that solid particles of different sizes and densities have different settling velocities in liquids, fine ore flows out from the overflow, and coarse ore settles at the bottom of the tank. Pushing the screw upwards and discharging it for grading the material, then rotating it into the feed port of the ball mill using a spiral blade, and the filtered fine material will discharge from the overflow pipe. This equipment has three functions: cleaning, dehydration, and grading.
2. Hydrocyclone (kaolin)
Hydrocyclone is a separation and classification equipment, that utilizes the principle of centrifugal sedimentation to separate minerals. There is a particle size difference between coarse and fine particles subjected to different degrees of centrifugal force, centripetal buoyancy, and fluid drag. Under the action of centrifugal sedimentation, most of the coarse particles are discharged through the bottom flow port of the hydrocyclone, while most of the fine particles discharge through the overflow pipe, achieving the purpose of separation and classification. The advantages of simple structure, small footprint, convenient installation and operation, and low operating cost, it has wide application in many fields. The classification and separation equipment for separating various slurries and mixtures has wide applications in industrial production enterprises such as mining processing plants and coal preparation plants.
Purpose: To classify materials.
Process: The washed material enters the hydrocyclone separator, through the particle size difference between coarse and fine particles, utilizing strong centrifugal force to separate the mixture at high speed. Most of the coarse particles discharge through the bottom flow port of the hydrocyclone, and most of the fine particles discharge through the overflow pipe, achieving the purpose of separation and classification.
3. Slurry magnetic separator (kaolin)
A wet magnetic separator is an equipment used in the mining industry, that performs magnetic separation on metal minerals, improves the ore grade, and removes iron from non-metallic minerals. It is popular in the mining industry.
Purpose: To separate magnetic minerals on graded kaolin.
Experimental process: Put the graded fine material into a slurry magnetic separator to separate the magnetic substances in the kaolin powder material. The equipment has a large magnetic field gradient to be paired with various special magnetic conductive stainless steel media to meet the beneficiation needs of different types of minerals.
Application: Widely applicable for removing iron powder, micro iron powder, and magnetic substances contained in raw materials in industries such as ceramics, mining, chemicals, electronics, and food.
4. Ball mill (silica sand)
Lab ball mills are the elemental equipment for mineral processing, the work of it is to regrind the crushed material to cause the individual dissociation of the target mineral and gangue mineral.
Purpose: Grind silica sand to 0.7mm
Experimental process: Pour the material into a ball mill, and through the collision between the steel ball and the material, grind the material into powder of 0-0.7mm or 0-200mesh as required.
Application: It is for grinding various ores (such as rock gold, lithium, chromium, copper, lead zinc, etc.) and construction cement.
5. Classifier (silica sand)
Classifiers are widely used in ore dressing plants to form a closed circuit circulation with ball mills to separate ore sand, or in gravity ore dressing plants to classify ore sand and fine mud, as well as in metal ore dressing processes to classify pulp particle size, and in ore washing operations such as desliming and dehydration. This machine has characteristics of a simple structure and reliable and convenient operation.
Purpose: To classify the particle size of the material and form a closed circuit grinding process with the ball mill. The coarse particles return to the ball mill for further grinding, while the fine particles enter the following equipment.
Experimental process: The discharge of the ball mill flows automatically to the classifier through the height differences, and grades the material in particle size.
Application: It usually works with ball mills to form a closed-circuit grinding system to achieve the required grinding particle size.
6. Laboratory flotation machine: (silica sand)
The XFD flotation machine has wide applications in mines and laboratory flotation machines for flotation experiments. Production practice has shown that this flotation machine has a reasonable structure, stable operation, reliable operation, and performance that meets the advanced level of foreign flotation machines. It is suitable for separating non-ferrous, ferrous, and non-metallic minerals. The laboratory flotation machine is a sorting equipment that requires the addition of conventional reagents. The chemicals required to handle different materials also vary. The laboratory flotation machine is suitable for processing minerals like gold sulfide, copper, lead zinc, fluorite, lithium ore, etc.
Purpose: To remove mica from silica sand
Process: Pour the slurry into the tank and dilute it with water to the desired slurry concentration. Start the motor and add an appropriate amount of flotation agent according to the experimental requests. When foam is generated in the tank, turn on the switch of the scraper part to start flotation. After reaching the specified flotation time, turn off the motor to stop the impeller and scraper from running.
7. High gradient magnetic separator (silica sand)
High gradient magnetic separator equipment is suitable for separating weak magnetic minerals, such as hematite, limonite, siderite, ilmenite, chromite, wolframite, tantalum niobium ore, red mud, etc. Iron removal and purification of non-metallic minerals, like quartz, feldspar, nepheline, fluorite, sillimanite, spodumene, kaolin, etc. The high gradient magnetic separator is suitable for wet magnetic separation of magnetite, pyrrhotite, calcined ore, ilmenite, and other materials with a particle size smaller than 3mm. It is also for iron removal operations of coal, non-metallic minerals, building materials, and other materials. The high gradient magnetic separator is a strong-magnetic separating machine for screening weakly magnetic minerals. For example, it is for removing iron in silica sand.
Purpose: To remove iron from silica sand
Process: Pour the material into a high-gradient magnetic separator, which generates a magnetic separation field in the sorting area and a high-gradient magnetic field on the surface of the magnetic medium located in the sorting area; The rotating ring rotates clockwise to continuously feed and transport the magnetic medium out of the sorting area; The slurry is fed into the ore hopper and flows through the rotating ring along the gap of the upper iron yoke. The magnetic particles in the slurry are adsorbed on the surface of the magnetic medium rod, transported by a rotating ring to the top nonmagnetic field area, and washed into the concentrate hopper by flushing water. Nonmagnetic particles pass through the magnetic medium pile under the gravity and pulsating fluid force and separate from the magnetic particles, then flow into the tailings hopper along the gap of the lower iron yoke for discharge.
JXSC lab mineral processing equipment manufacturer provides various laboratory experimental equipment, lab crushing machines, grinding machines, gravity separator machines, flotation machines, magnetic separators, etc. Besides, we also provide various mineral ore testing services to confirm the best mineral processing method for the mineral processing plant. If there are any questions about mining processing, come to inquire and get professional suggestions!
