Jaw crusher: The raw materials produced by the mine are transported to the production workshop of Beihewan Industrial Park. The raw materials are driven by the belt and pulley through the eccentric shaft of the jaw crusher to move the movable jaw up and down, pushing the movable jaw plate close to the fixed jaw plate. Through the extrusion, friction and grinding between the two jaw plates, the fluorite ore is crushed many times. When the movable jaw descends, the crushed materials are freely discharged through the discharge port at the bottom of the jaw cavity under the action of gravity and conveyed to the ball mill through the belt.
Ball mill: The crushed materials of the jaw crusher are conveyed to the ball mill through the transmission belt for further processing. The materials are fed by the feeding device through the hollow shaft spiral into the first bin of the mill, which has a stepped lining or corrugated lining, and various specifications of steel balls are installed. The centrifugal force generated by the rotation of the cylinder brings the steel balls to a certain height and then falls, which has an impact and grinding effect on the materials. After the materials are roughly ground in the first bin, they enter the second bin through a single-layer partition plate. The bin is inlaid with a flat lining plate and steel balls to further grind the materials. The powder is discharged through the discharging grate plate, and after the grinding operation is completed, it is transmitted to the classifier through the pipeline.
Classifier: When the raw material contains heavy mineral impurities, the classifier gravity separation method is used. Because it has no magnetism and its specific gravity is greater than fluorite, it can effectively remove such heavy mineral impurities. With the help of the principle that the solid particles have different sizes and specific gravities, and therefore have different sedimentation speeds in the liquid, the fine mineral particles float in the water and overflow, and the coarse mineral particles sink to the bottom of the tank. A grading equipment that is pushed to the upper part by the spiral to perform mechanical grading can filter the powder ground in the mill, and then use the spiral blade to screw the coarse material into the mill feed port, and the filtered fine material is discharged from the overflow pipe and transmitted to the magnetic separator.
Magnetic separator: One of the effective methods to remove iron impurities in the raw material by passing the finely ground fluorite ore powder through the magnetic separator. Since the hematite, limonite and biotite contained in the raw materials have weak magnetism, they can be selected by wet strong magnetic separator when the magnetic field strength is above 8×105A/m (ampere/meter); and for strong magnetic minerals mainly containing magnetite, weak magnetic separator or medium magnetic separator is used for separation. In order to further remove other small amounts of weak magnetic minerals (such as amphibole, pyroxene and the combination of magnetic minerals and fluorite), a high gradient magnetic separator with a magnetic field strength greater than 12000 Gauss can be used for secondary magnetic separation and tertiary magnetic separation before being transported to the flotation machine.
Flotation machine: The raw ore and reagent after magnetic separation are blended and stirred, and the different affinity between minerals and foam in the solution is used to form bubbles in the solution under the action of additives (adjusting agents), which are lifted to the water surface with the bubbles to form a concentrated layer. When the concentrated layer material is transported to the concentrator.
Concentrator: After adding a certain amount of flocculant to the concentrated pulp of flotation minerals, the solid particles in the pulp will form flocs. Under the action of gravity, the flocs gradually fall and finally settle at the bottom of the concentration tank to achieve solid-liquid separation. The sludge at the bottom of the concentration tank is discharged from the discharge port in the center of the pool bottom into the dryer under the action of the rake scraper, and the clarified water on the top overflows along the upper edge of the concentration tank for recycling.
Dryer: During the process of moving the sludge discharged from the bottom of the concentrator forward in the cylinder, it is directly or indirectly supplied by the heat carrier, so that the wet sludge can be dried. On the one hand, the dry ore powder flows to the rear end under the action of gravity and rotation, so that the material is repeatedly scattered, and the water contained is gradually dried, and the finished fluorite ore powder is discharged to the yard.
The overall construction is for fluorite concentrate processing. The above equipment is used to process fluorite ore with a grade of about 30%-50% into fluorite concentrate for sale.