Production of salt:
Salt can be mined from underground salt mines or seawater. Underground salt mines are formed by salt deposition in ancient oceans. Salt ore can be obtained by mining and excavation, and salt in seawater can be extracted by evaporation. Whether salt is extracted from salt mines or seawater, it needs to be crushed and ground.
The crushed and ground salt is mixed with water to form a salt solution, and then impurities and impurity particles are removed by filtration. Put the salt solution into an evaporator, and evaporate the water by heating, leaving the salt. This step can be repeated many times to gradually increase the salt concentration. When the salt concentration in brine reaches a certain level, the salt begins to crystallize.
The crystallized salt particles are separated by a centrifuge to remove the remaining water. The separated wet salt is dried to remove residual moisture, and then the salt is divided into different particle sizes by screening. Finally, the sun-dried salt is sealed in a packaging bag or container to keep it dry and fresh. Salt is usually stored in a dry environment to prevent moisture.
Matters needing attention in salt production:
1, health and safety:
Ensure the hygiene and safety of production process and equipment, and avoid salt pollution. Use clean workplaces, equipment and containers, and take appropriate sanitary measures, such as frequent cleaning, disinfection and good personal hygiene.
2. Quality of raw materials:
Select high-quality raw materials (such as salt ore or seawater) to make salt, so as to ensure that the raw materials are not affected by pollution or impurities and meet safety and quality standards.
3, reaction control:
Control the concentration, temperature and reaction time of brine to ensure the best crystallization effect and salt quality. Adjust production parameters in time to maintain the consistency and quality of products.
4, detection and analysis:
Regularly carry out salt quality testing and analysis to ensure that products meet food safety standards and regulatory requirements. Including salt content, mineral composition and possible harmful substances.