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[Chemical Knowledge]：Production and manufacturing method and process flow of ferrous sulfate

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The manufacturing method
of ferrous sulfate
1. Introduction

Ferrous sulfate is an important chemical production raw material, widely used in medicine, food, water treatment, pigments and other fields. In order to meet the quality and performance requirements of ferrous sulfate in different fields, it is necessary to explore suitable manufacturing methods. This article will introduce a manufacturing method of ferrous sulfate, which aims to improve product quality and yield and reduce production costs.

2. materials and equipment

1. materials: iron, sulfuric acid, sodium hydroxide, water.
2. Equipment: reaction kettle, agitator, filter, dryer, storage tank.

3. manufacturing methods

1. pretreatment of iron filings: iron filings clean, remove oil and other impurities, and then dry standby.
2. Acidolysis reaction: the pretreated iron filings are added to the reaction kettle, a certain concentration of sulfuric acid is added, and the reaction is carried out under the action of the stirrer. During the reaction, the temperature and the addition rate of sulfuric acid should be controlled to maintain the stability of the reaction.
3. Filtration and washing: After the reaction is completed, solid impurities in the reaction solution are removed through a filter, and then the filtrate is washed with clean water until the filtrate is neutral.
4. Precipitation and Crystallization: A certain amount of sodium hydroxide is added to the filtrate to precipitate ferrous sulfate. The pH value should be controlled during the precipitation process to ensure the purity and yield of ferrous sulfate. The precipitate is then subjected to crystallization to obtain crystals of ferrous sulfate.
5. Drying and packaging: The crystallized ferrous sulfate crystals are dried and then packaged to obtain the final ferrous sulfate product.
Precautions for
4.

1. During the acidolysis reaction, the temperature and the addition speed of sulfuric acid should be strictly controlled to prevent iron filings from dissolving too quickly and affecting product quality.
2. In the process of filtration and washing, the filtrate should be fully washed to avoid impurities in the product.
3. In the process of precipitation and crystallization, the pH value should be controlled to ensure the purity and yield of ferrous sulfate. At the same time, excessive stirring should be avoided to avoid damage to the crystal structure.
4. During the drying and packaging process, the drying temperature and time should be controlled to avoid thermal decomposition or deterioration of the product. At the same time, appropriate packaging materials should be selected to ensure the safety of product storage and transportation.

5. conclusion

The manufacturing method of ferrous sulfate introduced in this paper has the advantages of simple operation, high product quality and high yield, and is suitable for large-scale production. By strictly controlling the parameters and conditions of each process link, the quality and yield of ferrous sulfate can be further improved, production costs can be reduced, and greater economic benefits can be created for enterprises. At the same time, this method can also provide high-quality ferrous sulfate raw materials for other fields and promote the development of related industries.

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