The process of the white ash kiln is that the limestone and the fuel are charged into the white ash kiln (if the gaseous fuel is fed through the pipeline and the burner), the preheating starts to decompose at 850 degrees, the calcination is completed at 1200 degrees, and after cooling, it is discharged outside the kiln.
The process of the white ash kiln is thatthe limestone and the fuel are charged into the white ash kiln (if the gaseousfuel is fed through the pipeline and the burner), the preheating starts todecompose at 850 degrees, the calcination is completed at 1200 degrees, andafter cooling, it is discharged outside the kiln. That is to complete theproduction of quicklime products. Different kiln shapes have differentpreheating, calcination, cooling and unloading methods. However, there areseveral process principles that are the same: high quality of raw materials,good lime quality; high calorific value of fuel, low consumption; limestoneparticle size and calcination time are proportional; quicklime activity andcalcination time, calcination temperature is inversely proportional.
Lime is an essential excipient in thesteelmaking process. Its quality will directly affect the quality of the steelbeing refined. Therefore, the quality of lime is very important inmetallurgical enterprises. Although China is a big energy country, due tobackward technology, especially the old kiln type and soil burning lime kilnhave large pollution, poor quality, high energy consumption and low output,which cannot meet the quality requirements of white ash for steelmaking.
The lime kiln is mainly composed of a kilnbody, a feeding device, a distributing device, a burning device, an ashdischarging device, an electric appliance, an instrument control device, and adust removing device. Different forms of lime kiln have different structuralforms and calcined forms, and the process flow is basically the same, but theequipment value is very different. Of course, the effect is definitelydifferent.
For the burning of lime, in many cases,there is a great conflict with the theory. From the technical point of view,the burning of white ash is mainly from the selection of materials - thetreatment of selected stones - the management of classified stones - stone inthe kiln, when the kiln type is fired, there are different firing methods andtreatment methods. In the environmentally friendly “medium shaft kiln”, theburning method and treatment method are constantly updated. The white ashproduction process is still relatively backward compared with the internationalones. It requires us white ash people to use existing resources, challengehigher records, continuously improve process sublimation, continuously improveproduction processes, and constantly improve some theories of white ashproduction through practice.