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[Chemical Knowledge]：Manufacturing method and process of 74% calcium chloride powder

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The manufacturing method
of 74% calcium chloride powder
1. Introduction

calcium chloride is a widely used chemical product, especially in the fields of food, medicine, construction and industry. Among them, 74% calcium chloride powder is a common specification with various manufacturing methods. This article will detail one of the manufacturing methods.

2. materials and equipment

1. Materials: calcium stone, hydrochloric acid, water
2. Equipment: crusher, ball mill, stirred reactor, centrifuge, dryer, screening machine, packaging machine

3. manufacturing steps

1. Crushing and grinding: the calcium stone is crushed to the appropriate size, and then put into the ball mill grinding into powder.
2. Ingredients: According to a certain proportion of calcium powder and hydrochloric acid into the stirred reactor, while adding the right amount of water.
3. Reaction: open the stirred reactor, control a certain temperature and reaction time, so that calcium powder and hydrochloric acid fully react to generate calcium chloride and carbon dioxide gas.
4. Centrifugation: The reaction solution was poured into a centrifuge, and the calcium chloride slurry and unreacted solid impurities were separated by centrifugation.
5. Drying: The calcium chloride slurry is poured into a dryer, and the water is evaporated by heating to obtain a calcium chloride wet powder.
6. Screening: Use a sieving machine to screen the calcium chloride wet powder into the specified particle size range.
7. Packaging: Put the sieved calcium chloride powder into a packaging bag, seal and mark.
Precautions for
4.

1. Pay attention to safety during operation, avoid contact with skin and inhalation of dust.
2. Control the reaction temperature and time to ensure that the reaction is complete.
3. In the centrifugal separation process, the centrifuge should be cleaned in time to avoid the accumulation of impurities affecting the separation effect.
4. During the drying process, the heating temperature and air volume should be controlled to avoid caking of calcium chloride powder.
5. During the screening process, keep the screen clean and check the wear of the screen regularly to avoid affecting the screening effect.

5. Quality Control

In order to ensure the quality of 74% calcium chloride powder, the following quality control is required:

1. Raw material control: Quality inspection of raw materials such as calcium stone and hydrochloric acid to ensure that they meet relevant standards.
2. Process control: In the manufacturing process, the quality of each step is monitored to ensure that the process parameters meet the requirements.
3. Finished product inspection: Quality inspection of the 74% calcium chloride powder, including purity, particle size, moisture and other indicators, to ensure that it meets relevant standards and customer requirements.

6. Environmental Protection and Waste Treatment

In the process of manufacturing 74% calcium chloride powder, some wastes will be produced, such as unreacted solid impurities and carbon dioxide gas. In order to ensure environmental protection and safe production, the following treatments are required:

1. Unreacted solid impurities can be further processed to extract useful components or safely landfill.
2. Carbon dioxide gas can be absorbed by an absorbent or introduced into the flue gas for treatment to reduce the impact on the environment.

7. Conclusion

Through the above manufacturing methods and precautions, we can successfully manufacture 74% calcium chloride powder. In the whole process, we need to pay attention to safety, quality control and environmental protection issues to ensure product quality and production safety. At the same time, we also need to continuously explore and optimize manufacturing methods to improve production efficiency and quality to meet customer needs and market competition requirements.

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