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[Chemical Knowledge]：Production and manufacturing method and process of white phosphorus

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white phosphorus manufacturing method

1. introduction

white phosphorus is a very important chemical production of raw materials, widely used in pesticides, matches, fireworks and other fields. Therefore, it is of great significance to study the manufacturing method of white phosphorus for improving production efficiency, reducing costs and improving product quality. This article will introduce a common white phosphorus manufacturing method.

2. materials and equipment

1. materials: phosphate rock, coke, quartz sand.
2. Equipment: electric arc furnace, refining furnace, filter press, dryer, etc.

3. manufacturing method

1. batching

according to a certain proportion of phosphate rock, coke and quartz sand mixed evenly, made of burden. Phosphorus pentoxide content in phosphate rock should be not less than 30%, coke as reducing agent, quartz sand as flux.

2. Electric Arc Furnace Melting

The charge is added to the electric arc furnace and melted by arc heating. During the smelting process, the coke reacts with phosphorus pentoxide in the phosphate rock to produce phosphorus vapor and carbon monoxide. At the same time, quartz sand reacts with coke to form silicon and carbon monoxide.

3. Refining

Pour the ferrophosphorus alloy smelted in an electric arc furnace into a refining furnace, heat it to a certain temperature, and introduce air for oxidation refining. During the refining process, elements such as silicon and iron in the ferrophosphorus alloy are oxidized to form oxides and separated from phosphorus.

4. cooling and crystallization

after refining phosphorus liquid into the cooling crystallizer, cooling to a certain temperature, precipitation of white phosphorus crystal.

5. Separation and Drying

The white phosphorus crystals were separated from the mother liquor and then dried with a dryer to obtain a white phosphorus product.
Precautions for
4.

1. In the manufacturing process, various process parameters should be strictly controlled to ensure product quality and production safety.
2. The waste gas and waste residue generated in the manufacturing process should be properly treated to avoid environmental pollution.

5. Conclusion

This paper introduces a common white phosphorus manufacturing method, which has the advantages of simple process, convenient operation and high production efficiency. By strictly controlling the process parameters, high quality white phosphorus products can be obtained.

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