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[Chemical Knowledge]：Manufacturing method and process flow of industrial sulfur

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The manufacturing method
of industrial sulfur
1. Introduction

In the field of raw materials for the production of industrial chemicals, industrial sulfur is an important basic raw material and is widely used in agriculture, medicine, rubber, dyes, chemicals and other industries. Therefore, mastering the manufacturing method of industrial sulfur is of great significance for improving product quality, reducing costs and promoting industrial development. This paper will introduce the manufacturing method of industrial sulfur in detail, including raw material selection, process flow, reaction principle, equipment selection and so on.

2. raw material selection

The manufacture of industrial sulfur mainly uses natural sulfur ore or recycled sulfur-containing waste as raw materials. When selecting raw materials, it is necessary to consider its sulfur content, impurity composition and particle size to ensure the smooth progress of the production process and the stability of product quality.

3. Process
The manufacturing process of
industrial sulfur mainly includes the following steps:

1. Raw material crushing: crushing natural sulfur ore or sulfur-containing waste to a certain particle size for subsequent processing.
2. Smelting: The crushed raw materials are added to the smelting furnace and melted at high temperature to separate the sulfur from other impurities.
3. Clarification: After smelting, the sulfur liquid is clarified to remove the insoluble impurities.
4. Cooling crystallization: The clarified sulfur liquid is cooled and crystallized to obtain solid sulfur.
5. Centrifugal separation: The solid sulfur is separated from the mother liquor by a centrifuge to obtain the finished sulfur.
6. Drying: Dry the finished sulfur to reduce its moisture content and improve product quality.

4. reaction principle

In the manufacturing process of industrial sulfur, physical changes mainly occur, that is, the raw materials are melted, clarified, cooled and crystallized at high temperature. Among them, the reaction in the smelting process is as follows:

S (solid) heat energy → S (liquid)

5. equipment selection

In the manufacturing process of industrial sulfur, the equipment to be used mainly includes crusher, smelting furnace, clarification tank, cooling crystallizer, centrifuge and dryer, etc. When selecting equipment, it is necessary to select suitable equipment according to factors such as production scale, product quality requirements, and investment costs.

6. operating points

In the manufacturing process of industrial sulfur, the following operating points need to be paid attention to:

1. Control the smelting temperature and time to ensure that the sulfur is completely melted, and at the same time avoid excessive temperature leading to product quality degradation.
2. During the clarification process, proper stirring speed and time should be maintained to ensure sufficient precipitation of impurities.
3. cooling crystallization process to control the cooling rate and temperature, in order to obtain high quality solid sulfur.
4. The temperature and air volume should be controlled during the drying process to avoid overheating or excessive drying of the product.

7. safety production and environmental protection requirements

In the manufacturing process of industrial sulfur, it is necessary to strictly abide by the safety production and environmental protection requirements to ensure the safety, stability and environmental protection of the production process. Specific measures include:

1. Strengthen equipment maintenance and maintenance to ensure normal operation of equipment and prevent accidents.
2. Do a good job in staff safety training and education, improve staff safety awareness, to prevent misoperation.
3. Strengthen the ventilation and dust removal of the production site to reduce the hazards of dust and harmful gases to employees.
4. Proper treatment of waste residue and waste water generated in the production process to avoid environmental pollution.

8. conclusion

industrial sulfur is an important raw material for chemical production, and its manufacturing method is of great significance for improving product quality, reducing costs and promoting industrial development. In the actual production process, it is necessary to select suitable manufacturing methods and equipment according to the raw material situation, production scale, product quality requirements and other factors, and strictly abide by the safety production and environmental protection requirements to ensure the safety, stability and environmental protection of the production process.

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