how is lime manufactured from limestone?
Lime refers to the product extracted from calcined limestone, a naturally occurring and abundant resource. Lime production begins with the extraction of limestone from quarries and mines.
First, the limestone enters a limestone crusher for crushing until it reaches the desired size. Calcination is then carried out. The limestone is heated by direct contact with the kiln exhaust gas entering the preheater. The processed stone is transported to the lime kiln by a conveyor belt. To calcine limestone, a large amount of heat must be transferred to the limestone. In general, heat transfer from fuel to limestone can be divided into two stages: lime Calcination: The kiln fuel is burned in preheated air from the cooling zone, and as the limestone moves down the kiln, the heat converts the limestone into quicklime and carbon dioxide; cooling: the quicklime leaving the calcination zone is cooled by direct contact with "cooling air".
rotary lime kiln.jpg
In addition to lime rotary kilns, there are also vertical lime kilns. Lime shaft kilns are stationary vertical kilns where the raw limestone enters at the top and gravity flows through three thermally zoned sections known as the preheating, calcining, and cooling zones. and complete chemical reaction under the action of high temperature to decompose into calcium oxide (lime). After that, it is discharged from the kiln bottom by the disc ashing machine and the ash discharging device with the function of sealed discharge, to realize the non-stop wind unloading.
Xinxiang Great Wall Machinery can provide lime rotary kiln and vertical lime kiln, and undertake EPC projects such as active lime production line. If you want to know more about lime production, please feel free to inquire online or leave a message.