The manufacturing method of yellow phosphorus: Introduction: Yellow phosphorus is an important raw material for chemical production, widely used in agriculture, medicine, metallurgy, military and other fields. Therefore, studying the manufacturing methods of yellow phosphorus is of great significance for improving product quality, reducing production costs, and promoting industrial development. This article will provide a detailed introduction to the manufacturing methods of yellow phosphorus, including raw material preparation, reaction process, and product post-treatment
2、 The main raw materials for producing yellow phosphorus are phosphate ore and coke. Phosphate ore mainly contains calcium phosphate, while coke serves as a reducing agent and heat source. To ensure smooth production, strict screening and proportioning of raw materials are necessary. Generally speaking, the grade of phosphate ore should not be lower than 30%, the ash content of coke should not be higher than 12%, and the volatile content should not be lower than 1.5%
3、 The production process of yellow phosphorus is a reduction reaction at high temperature. Specifically, phosphate ore and coke are mixed in a certain proportion and added to an electric arc furnace for reduction reaction at high temperatures of 1300-1500 ℃. During the reaction process, the carbon in the coke reduces the calcium phosphate in the phosphate rock to elemental phosphorus, while generating carbon dioxide gas. The reaction equation is as follows:
2Ca3 (PO4) 2+6C → 6CaO+P4+6CO2
To ensure the smooth progress of the reaction, precise control of the electric arc furnace is required, including parameters such as furnace temperature, current, and voltage. At the same time, it is necessary to recover and treat the exhaust gas generated during the reaction process to avoid environmental pollution
4、 After the reaction is completed, the generated yellow phosphorus needs to be post-treated. Firstly, it is necessary to pour the melted yellow phosphorus from the electric arc furnace into the mold, cool and solidify it into solid yellow phosphorus. Then, the solid yellow phosphorus is subjected to processes such as crushing, screening, and packaging to obtain the final product. In this process, it is necessary to conduct strict quality testing on the product to ensure that it meets relevant standards
5、 The manufacturing process of yellow phosphorus involves hazardous factors such as high temperature, high pressure, and toxic and harmful gases, thus requiring comprehensive safety management and protective measures for the production process. At the same time, due to the production process producing a large amount of pollutants such as exhaust gas and waste residue, it is necessary to properly treat and recycle waste to avoid harm to the environment and human health
6、 Conclusion: The manufacturing method of yellow phosphorus involves multiple stages and control of process parameters, which requires ensuring the quality of raw materials, stability of reaction processes, and reliability of product quality. At the same time, it is necessary to strengthen safety production and environmental management to ensure the smooth progress of the production process and the protection of the environment.
