Due to the impact of airflow rising rapidly, the raw materials fed into the preheater pipe will move upward along with the airflow and be dispersed.
Gas-solid Separation
When the material powders laden gas flows into the cyclone separator at high velocity, it will be forced to revolve rapidly in the annular space between the cyclone wall and the exhaust pipe. Simultaneously, it will move downward from the cylinder part all the way to the end of the cone part. Then, it will revolve upward in turn and be exhausted from the exhaust pipe.
Predecomposition
The pre-decomposition technology is a great leap in cement manufacturing process. It can be completed in the decomposition furnace added between the preheater and the rotary kiln. Based on the kiln tail uptake flue, a fuel injection device is equipped to ensure that the exothermic process of fuels combusting and the endothermic process of raw materials decomposing can be rapidly competed in the decomposition furnace in suspension or flow condition, consequently increasing decomposition rate to over 90%.
The pre-decomposition process moves the carbonate decomposition previously completed in the rotary kiln into the newly added decomposition furnace. The most of fuels can be added directly from inside of the decomposition furnace while small part of fuel is added from the kiln head, which can relieve the thermal load of calcining zone in the kiln and prolong service life of the refractory materials, thus being favorable for large-scale production. Due to uniform mixing of the fuels and raw materials, the heat caused by the fuel combusting can be timely transferred to the raw materials, optimizing the combustion, heat transferring and carbonate decomposition process. To sum up, the pre-decomposition technology features superior quality, high efficiency and low energy consumption.