There are various types of lime kiln technologies in China, and the technology is mature
Lime, as an important inorganic chemical raw material, has a wide range of applications in various fields such as construction, metallurgy, and chemical engineering. The production of lime cannot be separated from lime kilns, which are ancient yet full of modern technology. In China, there are various types of lime kiln technologies that are mature and provide a solid foundation for the development of the lime industry.
China has a long history of lime kiln technology, ranging from ancient wild kilns to modern rotary kilns, sleeve kilns, etc., with a wide variety of types and unique features. Wild kiln, as the simplest and oldest type of lime calcination kiln, although the operating conditions are relatively simple, still has a wide range of applications in some areas. With the advancement of technology, continuous operation kilns such as rotary kilns and vertical kilns have gradually replaced field kilns, greatly improving the production efficiency and quality of lime.
Among numerous lime kilns, the vertical kiln is undoubtedly the most commonly used lime calcination kiln. There are many types of shaft kilns, including ordinary shaft kilns, mixed material mechanized shaft kilns, peripheral semi gas combustion chamber shaft kilns, gas fuel fired shaft kilns, liquid fuel fired shaft kilns, etc. These vertical kilns not only have different structures, but also different calcination forms, but they can effectively calcine limestone into lime. In addition, rotary kilns, boiling kilns, etc. are also commonly used kiln types in lime production, each with unique advantages and suitable for different production needs.
In addition to traditional lime kilns, China has also introduced many advanced foreign technologies and developed and innovated on this basis. For example, advanced kiln types such as blended lime vertical kiln, double chamber kiln, and sleeve kiln have been widely used in lime production in China. These advanced kiln types not only improve the production efficiency and quality of lime, but also reduce energy consumption and pollutant emissions, in line with national environmental policies.
The technical characteristics of lime kilns are also diverse. For example, an advanced vertical preheater can effectively improve the preheating effect, resulting in a decomposition rate of 20-25% for the preheated limestone entering the kiln. At the same time, the reliable combination of scale seals at both ends of the lime kiln and circular or square vertical coolers that can be partitioned for ventilation also make lime production more stable and efficient. In addition, the particle size control, fuel ratio, air supply rationality, and overburning of lime kilns are also technical points that need to be paid attention to in lime production.
The composition of lime kilns is also diverse, mainly including kiln body, feeding device, material distribution device, combustion device, ash unloading device, electrical appliances, instrument control device, dust removal device, etc. These components work together to facilitate the smooth production process of lime.
There are various types of lime kiln technologies in China, and the technology is mature. Whether it is traditional field kilns, vertical kilns, or advanced kiln types such as modern rotary kilns and sleeve kilns, they all play an important role in the production of lime. Meanwhile, with the continuous advancement and innovation of technology, China's lime kiln technology will continue to develop towards greater efficiency, environmental protection, and intelligence.
