Phosphate generally refers to the ability to be recycled phosphate mineral economy, its share of the mass fraction of P2O5 grade, ie W (P2O5)%. China's phosphate rock resources accounted for second in the world, to identify the phosphate reserves of 176 billion tons, mainly distributed in Yunnan, Guizhou, Sichuan, Hubei and other places.

Phosphorus mainly used in the fertilizer industry, in addition, in the application of aviation, food, medical, defense and other sectors are increasingly widespread. In recent years, domestic and international demand for phosphorus is rising, and with the continuous mining bonanza of phosphorus, phosphorus bonanza less and less, more and more phosphorus lean ore, prompting phosphate beneficiation of phosphate rock beneficiation technology and equipment innovation, progress ,development of.

Common phosphate rock beneficiation Process description:

First, the crushing and screening stage

Different components of phosphate rock hardness are low, are fragile to medium can be broken of ore, therefore, a two-stage crushing and screening usually closed or two open process. Phosphate rock crushing equipment generally choose jaw crusher or gyratory crusher; broken equipment generally used cone crusher; screening equipment generally used in circular or linear vibration sieve shaker.

Second, the grinding stage

Phosphate rock belongs ore grindability good, so phosphate rock grinding process usually closed-circuit grinding process or period of two closed-circuit grinding process, the use of a ball mill grinding equipment generally. Conventional ball mill (or lattice-type ball mill, overflow ball mill) large energy consumption, steel consumption larger, higher grinding costs. Baoshan produces a variety of energy-saving ball mill, can make steel energy consumption, consumption was significantly reduced (20% to 30%). In addition, the use of the company Baoshan super wear-resistant rubber mill lining, can effectively improve the life of the liner, improve mill operating rate of the device.

Third, the beneficiation stage

Phosphate beneficiation process are: process scrub off the mud, heavy media separation process, flotation process, combined with heavy maglev technology, roasting - digestion process, microbial treatment process, the dry electrostatic separation process, the magnetic cover technology and so on. Industrial production, the flotation process and heavy media separation + phosphate beneficiation process flotation process is commonly used in sorting method.

Flotation process

Process Advantages: can handle various properties of ore. Flotation ore can be removed siliceous gangue, phosphate rock, and thus can handle siliceous sedimentary-metamorphic silicon - calcium and phosphorus limestone; single reverse flotation to remove calcium (magnesium) gangue, it can handle deposition type calcium (magnesium) quality phosphate rock; - reverse flotation (trans - positive) flotation and double reverse flotation by removing silicate minerals and carbonate minerals to achieve the purpose of enrichment of phosphate material, it can be processing refractory sedimentary silicon calcium (magnesium) quality phosphate rock; treatable stage flotation gangue minerals and phosphate material disseminated fine grain size collophane. Beneficiation flotation process indicators of good, phosphate concentrate W (P2O5) grade up to 30% to 40%; P recoveries up to 75% to 90%.

China's phosphate rock flotation operating conditions and quality indicators are generally as follows:

Flotation equipment: Flotation machine flotation device. Flotation machine self suction mechanically stirred, inflatable stirred, airlift and pressure flotation machine. Many of the options currently on the market have adopted the plant Baoshan Shicheng mining equipment flotation machine. Baoshan production flotation device model specification is complete (for large, medium and small processing plant selection), low operating rate, low maintenance, energy consumption, flotation index is good and inexpensive, greatly reducing the floating concentrator election costs.

Heavy media separation flotation process +

Process advantages: It can be widely used in sorting silicon calcium phosphate rock. Good beneficiation indicators, phosphate concentrate W (P2O5) grade of 30% to 41%; phosphorus recovery rate of 75% to 90%. Heavy media separation low cost, little environmental pollution. In addition to heavy media separation throw most of tailings, can greatly reduce the use of flotation reagents, flotation equipment, mineral processing cost savings.