Manufacturing method of lightweight soda ash
I. INTRODUCTION
Lightweight soda ash is an important inorganic chemical raw material, which is widely used in the fields of glass, soap, detergent, food and medicine. With the continuous development of science and technology, the manufacturing method of lightweight soda ash has been improved to increase the production efficiency and quality. This article will introduce the manufacturing method of lightweight soda ash in detail, including raw material preparation, chemical reaction, separation and purification, drying and packaging steps.
Second, raw material preparation
The main raw materials of light soda ash are table salt and limestone. Table salt mainly contains sodium chloride, while limestone mainly contains calcium carbonate. In order to ensure the smooth running of the production process, the raw materials need to be treated in a certain way. Table salt needs to go through washing, drying, sieving and other steps to ensure that its purity and particle size meet the production requirements. Limestone, on the other hand, needs to be calcined, crushed and other steps to convert it into calcium oxide and carbon dioxide.
Three, chemical reaction
The production of light soda ash mainly involves the following chemical reaction:
NaCl + CaCO3 → Na2CO3 + CaCl2
The reaction is carried out at high temperatures, and it is necessary to add the raw materials to the kiln, so that the reaction can be carried out by high temperature calcination. During the reaction, a certain temperature and reaction time need to be controlled to ensure the complete reaction and the purity of the product. At the same time, it is also necessary to pass a certain amount of air, so that calcium carbonate is fully decomposed into calcium oxide and carbon dioxide.
Four, separation and purification
After the reaction is completed, the product needs to be separated and purified. First, the product in the kiln needs to be cooled to a certain temperature, and then crushed and sieved. The sieved product contains impurities such as light soda ash and calcium chloride, which need to be further separated. The commonly used separation methods are recrystallization and ion exchange. Among them, the recrystallization method is to dissolve the product in water and separate the light soda ash from the impurities by means of crystallization; the ion exchange method is to remove the impurity ions in the light soda ash solution by using ion exchange resin. The purity of light soda ash after separation and purification can be more than 99%. V. Drying and Packaging
In order to ensure the quality and storage period of light soda ash, it needs to be dried and packaged. The drying process needs to control a certain temperature and humidity to avoid moisture absorption and caking. Packaging requires the selection of suitable packaging materials and methods to ensure the stability and safety of the product during transportation and storage. Commonly used packaging methods are bagged and bulk, of which the bag is suitable for small batch production, while the bulk is suitable for large-scale production.
VI. Precautions
In the production process of light soda ash, the following matters need to be paid attention to: firstly, the quality and particle size distribution of raw materials need to be strictly controlled to ensure the smooth progress of the reaction and the purity of the product; secondly, the reaction temperature and reaction time need to be controlled to avoid the appearance of un-reacted raw materials or by-products in the product; lastly, it is necessary to strengthen the safety management and environmental protection measures during the production process, to ensure that the The production process meets the requirements of relevant regulations and standards.
VII.CONCLUSION
Light soda ash, as an important inorganic chemical raw material, its manufacturing method involves the control of several links and process parameters. Through reasonable raw material preparation, chemical reaction, separation and purification, drying and packaging steps, high purity light soda ash products can be produced. In the production process, attention needs to be paid to safety management and the implementation of environmental protection measures to ensure the smooth progress of the production process and the stability and reliability of product quality.
