Phosphorus is an important element and one of the elements necessary for plant growth. Physical properties of phosphorus: There are three allotropes of free phosphorus: white phosphorus, red phosphorus, and black phosphorus. The molecular structure of white phosphorus is regular tetrahedron, which is difficult to dissolve in water, highly toxic, and has an ignition point of 40 ° C. It can be stored in cold water with a small amount of white phosphorus. in. Red phosphorus is a polymer structure and is basically non-toxic, so red phosphorus is a formula for match heads and boxes. There are many applications of black phosphorus.
Phosphate ore in nature mostly refers to phosphate minerals. Common phosphate ore includes fluoroapatite, fluoroapatite, hydroxyapatite, hydroxyapatite, chloroapatite, blue iron ore, phosphorus Strontium bauxite and so on. The identification of phosphate ore mainly depends on the content of phosphoric anhydride (P2O5). At present, the indicators for the grade of phosphate ore in China are:
It is a first-grade product and can be directly used without beneficiation;
It is a second-grade product and can be directly used;
P2O5 = 12-15%, third-grade product, need beneficiation.
- Recommended models: Vibrating feeder equipment Features: Uniform feeding, high strength
- Recommended model: Jaw crusher Features: Simple structure, durable, suitable for most production lines
- Recommended model: Ultra-fine powder mill Features: Handle fine powder (325-2500 mesh), high pass rate
- Recommended models: YGM4528 high pressure mill
Features: Simple structure, durable, suitable for most production lines.
Low-grade phosphate ore is often accompanied by the symbiosis of silicate and carbonate ore. For the low-quality silicon apatite after the collapse, we first crush it with a crushing device (jaw crusher), and then use a mill (Raymond mill, high-pressure mill, sand mill can be used) The ore is ground to 100-200 mesh, and heated flotation (coarse separation operation temperature) is used. The flotation agent used is sodium carbonate, crude sulfated soap, water glass, etc. Finally, 30% and above phosphate concentrates can be obtained.
For high-grade (P2O5> 25%) phosphate ore, it can be directly used without beneficiation, but it must be crushed and ground. Generally, they are produced through complete sets of mill equipment. For large-scale fertilizer plants, their production is to first mine the ore, crush them with a large jaw crusher, and then use the complete set of mill equipment to remove these phosphate ore. Processed into a fineness of 100-200 meshes and used as a phosphate fertilizer in agriculture. The complete set of milling machine equipment includes small jaw crusher, reducer, main machine, powder separator, dust collector, pipeline device and so on. Our company has cooperated with Indonesian fertilizer giants to provide them with 30 high-pressure mills and send people to regulate operations, mainly for phosphate fertilizer production.
Q: Why do different grades of phosphate rock affect the utilization process?Different grades represent the content of phosphoric anhydride (P2O5), and represent the value of its application. The most important use of phosphate rock is chemical fertilizer production. Phosphate fertilizer has requirements for phosphorus content. Therefore, low-grade phosphate ore should be added to the flotation process before grinding can be used for fertilizer production.
Q: What equipment is used for phosphate grinding?Phosphate ore is mainly pulverized by a milling machine. The milling equipment is nothing more than ball mills and vertical mills (high pressure mills, Raymond mills, cement vertical mills, and sand mills). For example, our Indonesian customers use high pressure Mill is used to grind phosphate ores and is used in fertilizer production.
Processing purpose: milling
Target hourly output: 12 tons per hour
Recommended models: 4528 mill
Processing use: crushing
Target hourly output: 150 tons per hour
Recommended models: PYF1636 cone break