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What can phosphorous powder be used for

wallpapers News 2021-01-29
Ways to improve the efficiency of phosphate rock powder fertilizer
The first is soil conditions. The dissolution of phosphate rock powder is directly affected by soil acidity. The stronger the soil acidity, the greater the ability to dissolve phosphate rock powder and the higher the fertilizer efficiency. Therefore, phosphate rock powder is suitable for application to acid soil. However, the application of phosphate rock powder on calcareous soil with very low available phosphorus content sometimes has a certain effect on increasing production. This may be related to the fact that the roots of crops can secrete acidic substances when they are severely deficient in phosphorus. The second is the type of crop. The ability of various crops to absorb insoluble phosphate is very different, so the fertilizer effect is different after applying phosphate rock powder. This is related to the characteristics of the roots of various crops, such as the cation exchange capacity of the roots and the number of acidic substances secreted by the roots. Most leguminous crops with a large root cation exchange capacity have a relatively strong ability to use phosphorus in phosphate rock powder, and therefore have good fertilizer efficiency; crops with high acidity of root exudates have a strong ability to absorb phosphorus. In addition, perennial economic forests and fruit trees have relatively strong utilization of phosphate rock powder. 

Use of phosphor powder
Red phosphorus flame retardant is a non-halogen efficient flame retardant. Since red phosphorus will produce violent dehydration into charcoal when it is burned, it can effectively prevent burning and has a very effective flame-retardant effect. It can be widely used for flame-retardant rubber and plastic products. Phosphorus content in polymer materials up to 5% has a self-extinguishing effect, which is much lower than other flame retardants. In theory, red phosphorus flame retardants can be applied to most polymer materials, but because ordinary red phosphorus is easy to absorb moisture and has poor compatibility with polymer materials, it is particularly easy to cause spontaneous combustion and cannot be used in practice. In order to make it convenient for safe storage, transportation and use, colloidal red phosphorus and microencapsulated red phosphorus products have appeared successively. These products solve the disadvantages of red phosphorus and have low smoke, high flame retardant efficiency, no dust pollution, and excellent processing performance. It has many advantages and is widely used for flame retardant materials such as PET, PC, PBT, PA and other oxygen-rich materials.

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