Lime kiln calcination technology manufacturer guidance
In the field of lime production, calcination technology is the core link that determines product quality and production efficiency. As a professional service provider of lime kiln calcination technology, we deeply understand the importance of technological optimization for industrial upgrading.
1、 The core elements of calcination process
The essence of lime kiln calcination is an endothermic reaction in which calcium carbonate (CaCO) decomposes into calcium oxide (CaO) and carbon dioxide (CO ₂). The key control parameters include:
Temperature control: The temperature of the calcination zone needs to be accurately maintained between 1000 ℃ and 1200 ℃. If it is too high, it will cause the lime to overheat and reduce its activity, while if it is too low, it will not decompose completely.
Atmosphere management: Adopting a weakly reducing atmosphere to avoid limestone sintering, while reducing nitrogen oxide generation through low oxygen combustion technology.
Material ratio: The ratio of limestone to fuel needs to be dynamically adjusted to ensure that the heat supply matches the decomposition demand.
2、 Technical optimization direction
Energy saving renovation: By optimizing the insulation layer of the kiln and adopting oxygen rich combustion technology, the energy consumption per unit product can be reduced.
Automation upgrade: Deploy PID controller and fuzzy control system to achieve real-time closed-loop adjustment of temperature and pressure parameters.
Environmental upgrade: Integrated bag filter and desulfurization device, reducing the dust content of exhaust gas to below 30mg/Nm ³, meeting ultra-low emission standards.
3、 Industry practice cases
The 600t/d active lime production line of a certain steel group adopts a vertical preheater+rotary kiln process, which reduces the heat consumption to 1150kJ/kg, consumes 45kWh/t of electricity, and the product activity reaches 380ml/4N HCl, directly reducing the energy consumption of the steelmaking process.
