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

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The manufacturing method
of yellow phosphorus
1. Introduction

Yellow phosphorus is an important raw material for chemical production, widely used in agriculture, medicine, metallurgy, military and other fields. Therefore, it is of great significance to study the manufacturing method of yellow phosphorus for improving product quality, reducing production costs and promoting industrial development. This article will introduce the manufacturing method of yellow phosphorus in detail, including raw material preparation, reaction process, product post-treatment and so on.

2. raw material preparation

manufacturing yellow phosphorus main raw materials are phosphate rock and coke. Phosphate rock mainly contains calcium phosphate, while coke acts as a reducing agent and heat source. In order to ensure the smooth progress of production, the raw materials need to be strictly screened and proportioned. Generally speaking, the grade of phosphate rock should not be less than 30%, the ash content of coke should not be higher than 12%, and the volatile content should not be less than 1.5.

3. reaction process

yellow phosphorus manufacturing process is a high temperature reduction reaction. Specifically, the phosphate rock and coke are mixed according to a certain ratio, and then added to the electric arc furnace, and the reduction reaction is carried out at a high temperature of 1300-1500 ℃. In the reaction process, the carbon in the coke reduces the calcium phosphate in the phosphate rock to the phosphorus element, and at the same time generates carbon dioxide gas. The reaction equation is as follows:

2Ca3(PO4)2 + 6C → 6CaO + P4 +6 CO2

In order to ensure the smooth progress of the reaction, it is necessary to accurately control the electric arc furnace, including furnace temperature, current, voltage and other parameters. At the same time, the waste gas generated in the reaction process needs to be recovered and treated to avoid environmental pollution.

4. product post-treatment
After the end of the
reaction, it is necessary to post-treat the generated yellow phosphorus. First, the molten yellow phosphorus in the electric arc furnace needs to be poured into the mold, cooled and solidified into solid yellow phosphorus. Then, the solid yellow phosphorus is crushed, screened, packaged and other processes to obtain the final product. In this process, it is necessary to carry out strict quality inspection on the products to ensure that they meet the relevant standards.

5. safety production and environmental protection requirements

yellow phosphorus manufacturing process involves high temperature, high pressure, toxic and harmful gases and other risk factors, so it is necessary to carry out comprehensive safety management and protective measures for the production process. At the same time, due to the production process will produce a large number of waste gas, waste residue and other pollutants, it is necessary to properly treat and recycle the waste to avoid harm to the environment and human health.

6. conclusion The manufacturing method of

yellow phosphorus involves the control of many links and process parameters, and it is necessary to ensure the quality of raw materials, the stability of the reaction process and the reliability of product quality. At the same time, it is necessary to strengthen the management of production safety and environmental protection to ensure the smooth progress of the production process and the protection of the environment.

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