subject: Talc Mining Equipments Used For Extraction And Processing Plant [print this page] In the talc processing plant, talc mining equipments such as crusher, grinding mills are used for talcum extraction process.
Most domestic talc is mined from open-pit operations; over 95 percent of the talc ore produced in the United States comes from open-pit mines. Mining operations usually consist of conventional drilling and blasting methods.
Chinese talc ore beneficiation widely used hand-selected, dry-mill air classification. Although individual factories have been established column flotation selection process, it has not been widely used. At present, these processes have already finished their beneficiation research and testing, including optical selection process, bleach, dry or wet magnetic separation, hydrocyclone separation, scrubbing precipitation concentration, centrifugal classification, spray drying, and talcum powder layering process , sterilization and other special processes.
The new plant consisted of a 250 tonne per hour crushing and screening plant that contained a vibrating triple deck screen to manage the different talc product streams of the operation. A significant sampling system was installed on both the lump and fines stream to maintain the quality control of the talc product for customers.
Talc ore generally is hauled to the plant by truck from a nearby mine. The ore is crushed, typically in a jaw crusher, and screened. The
coarse (oversize) material then is returned to the crusher. Rotary dryers may be used to dry the material. Secondary grinding is achieved with pebble mills or roller mills, producing a product that is 44 to
149 micrometers (Fm) (325 to 100 mesh) in size. Some roller mills are designed to use heated air to dry the material as it is being ground. Hammer mills or steam- or compressed air-powered jet mills may be used to produce additional fine products. Air classifiers (separators), generally in closed-circuit with the mills, separate the material into coarse, coarse-plus-fine, and fine fractions. The coarse and coarse-plus-fine fractions then are stored as products. The fines may be concentrated using a shaking table (tabling process) to separate product containing small quantities of nickel, iron, cobalt, or other minerals, and then undergo a one-step flotation process. The resultant talc slurry is dewatered and filtered prior to passing through a flash dryer. The flash-dried product is then stored for shipment, or it may be further ground to meet customer specifications. The classified material may also be pelletized prior to packaging for specific applications. In the pelletizing step, processed talc is mixed with water to form a paste and then extruded as pellets.
SBM Machinery talc powder production line consists of four parts: warm-dry, grinding, ultra-fine grinding and air compression system. Main and auxiliary equipment: 250mm 400mm jaw crusher six sets, SZZ 1 250mm 2 500mm self-centering vibrating screen six sets, 5R Raymond six sets, GR-180 grinding machine 2 sets (for the jet mill preparation, SBM production), flat-type jet mill 1 set.
