Manufacturing Methods of Ferrous Sulfate
I. Introduction
Ferrous sulfate is an important raw material for the production of chemicals, which is widely used in the fields of medicine, food, water treatment and pigment. In order to meet the requirements for the quality and performance of ferrous sulfate in different fields, it is necessary to explore suitable manufacturing methods. In this paper, a manufacturing method of ferrous sulfate will be introduced, aiming at improving product quality and yield and reducing production cost.
II. MATERIALS AND EQUIPMENT
1. Materials: iron chips, sulfuric acid, sodium hydroxide, water.
2. Equipment: reactor, stirrer, filter, dryer, storage tank.
3. Manufacturing method
1. Pretreatment of iron chips: clean the iron chips, remove oil and other impurities, then dry and spare.
2. Acid decomposition reaction: Add the pretreated iron chips into the reactor, add a certain concentration of sulfuric acid, and carry out the reaction under the action of stirrer. The temperature and the addition rate of sulfuric acid need to be controlled during the reaction to maintain the stability of the reaction.
3. Filtration and washing: After the reaction, the solid impurities in the reaction solution are removed through a filter, and then the filtrate is washed with water until the filtrate is neutral.
4. Precipitation and crystallization: A certain amount of sodium hydroxide is added to the filtrate to precipitate the ferrous sulfate. The pH needs to be controlled during precipitation to ensure the purity and yield of ferrous sulfate. Then the precipitate is crystallized to obtain the 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.
4. Precautions
1. In the process of acidolytic reaction, the temperature and the addition rate of sulfuric acid should be strictly controlled to prevent the iron filings from dissolving too quickly and affecting the product quality.
2. In the process of filtration and washing, it should be ensured that the filtrate is sufficiently washed to avoid impurities in the product.
3. During precipitation and crystallization, pH should be controlled to ensure the purity and yield of ferrous sulfate. Meanwhile, excessive stirring should be avoided to avoid destroying the crystal structure.
4. In the process of drying and packaging, the drying temperature and time should be controlled to avoid thermal decomposition or deterioration of the product. Meanwhile, suitable packaging materials should be selected to ensure the safety of product storage and transportation.
V. CONCLUSION
The manufacturing method of ferrous sulfate introduced in this paper has the advantages of simple operation, high product quality, high yield, etc., 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, the production cost can be reduced, and greater economic benefits can be created for the enterprise. 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.
