At present, due to relatively few natural sulfur resources and relatively high production costs, 98% of the world’s sulfur comes from recycled sulfur, which is recycled during the production of natural gas and oil. Due to the production process, the recovered sulfur is generally of low purity, called crude sulfur, which needs to be purified before it can be used in the production and application of other fields.
The crude sulfur purification method is to distill the crude sulfur by-product in the coking plant in a vacuum, and the sulfur can be raised at a temperature of 70°C. This purification process is relatively simple to apply to production. Compared with the existing crude sulfur extraction process, the pollution to the environment is greatly reduced, the process flow is shorter, the operation is simple, and the purity of the purified industrial sulfur powder is also improved.
The operating principle of crude sulfur purification is to first place the crude sulfur in a vacuum distillation furnace, vacuumize and heat up, and separate the substances in the crude sulfur through distillation. The first step is to control the higher distillation temperature to distill and collect sulfur and low boiling point substances; the second step is to put the low boiling point substances obtained from the distillation into the distillation furnace and control the lower temperature to make the low boiling point substances The material is distilled out. Through these two points, sulfur with higher purity can be collected.