What is the overburning rate of rotary kiln lime kiln?
The rotary kiln lime kiln is an important equipment in the field of lime production, and its calcination effect directly affects the quality and output of lime. However, in the actual production process, overburning occurs from time to time, which not only reduces the quality of lime, but also increases production costs.
Overburning refers to the excessive calcination of limestone in the rotary kiln, which causes changes in the structure and properties of lime, reduces activity, and even produces cracks and sintered blocks. The occurrence of overburning is often related to a variety of factors.
First, the temperature in the kiln is a key factor affecting the overburning rate. Uneven temperature distribution in the rotary kiln or excessive temperature may cause limestone to overburn. Especially in the head and tail of the kiln, due to the concentrated heat and high temperature, overburning is more likely to occur. Therefore, it is an important measure to reduce the overburning rate to reasonably control the temperature in the kiln and ensure uniform temperature distribution.
Secondly, the particle size distribution and chemical composition of limestone will also affect the overburning rate. Limestone with uneven particle size distribution is unevenly heated during the calcination process, which can easily lead to overburning of some limestone. Limestone with different chemical compositions is also sensitive to temperature to different degrees, and some are more likely to overburn. Therefore, when selecting limestone raw materials, it is necessary to pay attention to its particle size distribution and chemical composition to minimize the overburning rate.
In addition, the operating parameters of the rotary kiln, such as speed, slope and ventilation volume, will also affect the overburning rate. If the speed is too fast, the residence time of the limestone in the kiln is too short, and it may not be fully decomposed, while too slow may lead to overburning. The slope determines the movement trajectory of the limestone in the kiln, and the ventilation volume affects the transfer and distribution of heat. Therefore, reasonable adjustment of these operating parameters will help reduce the overburning rate.
In the actual production process, reducing the overburning rate of the rotary kiln lime kiln requires comprehensive consideration of multiple factors. In addition to the above measures, the calcination process can also be optimized by strengthening the control of the atmosphere in the kiln, such as adjusting the oxygen content and carbon dioxide concentration. At the same time, regular maintenance and maintenance of the rotary kiln to ensure its normal operation is also an important guarantee for reducing the overburning rate.
The overburn rate of rotary kiln lime kiln is a complex issue involving multiple factors. By reasonably controlling the temperature in the kiln, selecting high-quality limestone raw materials, adjusting operating parameters and strengthening equipment maintenance, we can effectively reduce the overburn rate and improve the quality and output of lime.
