Lime is a necessary auxiliary material in the steelmaking process. Its quality will directly affect the amount and quality of the steel produced. Therefore, in metallurgical enterprises, the quality of lime is very important. Although my country is a big energy country, due to the backward technology, especially the old kiln type and earth-burning lime kiln, the pollution is large, the quality is poor, the energy consumption is high, and the output is low, which cannot meet the quality requirements of steelmaking for white ash.
The process of the limestone kiln is as follows: limestone and fuel are loaded into the limestone kiln (if gaseous fuel is fed through a pipe and burner), and then preheated to 850 degrees Celsius to begin to decompose, to 1200 degrees Celsius to complete the calcination, and then cooled, discharged out of the kiln . The production of quicklime products is completed. Different kiln shapes have different preheating, calcination, cooling and ash unloading methods. However, several technological principles are the same: high quality raw materials and good lime quality; high fuel calorific value and low quantity consumption; limestone particle size is directly proportional to calcination time; quicklime activity is inversely proportional to calcination time and calcination temperature.
The lime kiln is mainly composed of kiln body, feeding device, cloth device, combustion device, ash unloading device, electrical appliances, instrument control device, dust removal device, etc. Different types of lime kilns have different structural and calcination forms, and the process flow is basically the same, but the equipment value is very different. Of course, the use effect is definitely different
For the burning of lime, in many cases, there is a big conflict with the theory. From a technical standpoint, the burning of white ash is mainly from the selection of materials-the processing of selected stones-the management of classified stones-the stones When entering the kiln, each type of kiln has different firing methods and treatment methods during firing. For the environmentally friendly "medium vertical lime kiln", the firing method and processing method are constantly updated. The white ash production process of China is still relatively backward compared with the international ones, so we need to use existing resources, challenge higher records, continuously improve the process sublimation, continuously improve the production process, and continuously improve some theories of white ash production through practice. .
