Processes that Rotary Kilns Can Handle
Rotary kilns are extremely popular due a variety of reasons. Thermal processing is a vital part of many production processes and should be conducted with the best equipment. Rotary kiln is a heavy-duty rotating vessel where the material is being thermally processed in presence of hot gases or combustion gases.
Note that most of the processes are being conveyed at extremely high temperatures and in closed vessels thus rendering visual observation of the process nearly impossible. Many people simply do not know what happens inside the vessel and the lack of knowledge prevents them from incorporating this versatile equipment into their production lines. We want to give you a brief observation of various industrial applications for rotary kilns.
Chemical separation of the material is a very efficient way to produce certain goods and useful inorganic materials that can be used for further processing. One of the prime examples of this process is processing calcium carbonate that can be disassembled into two compounds – calcium oxide and dioxide.
Another common application is bound moisture removal. One of the most popular materials that can be processed via calcination is viscous. An efficient granulation is nearly impossible after pressing or drying, the amount of moisture removed is simply not enough to reach the driest consistence of the material.
Sometimes, the material is a mixture of two ingredients one of which could be easily combustible. In order to prevent ignition that can cause massive pollution, we approach the process elegantly by introducing the material to thermal desorption. During this process, the organic part of the material is being heated up to a certain temperature at which it starts separating from the mixture. In order to completely avoid combustion, indirect rotary kilns are used successfully. Thermal desorption is the perfect choice for a multitude of processing procedures with the most common being separating pesticide from inorganic minerals. Pesticide can be highly volatile and separating it without ignition is one of the most efficient industrial operations.
At facilities that generate or process large masses of organic waste, direct rotary kilns are used for organic combustion. Burning down organic waste significantly reduces the volume of overall waste reducing the pressure on nearby landfills. Direct rotary kilns distribute heat evenly and efficiently. At the same time, organic combustion is a process that allows a direct contact between the material and flame.
Some materials need to be strengthened in order to reach the best properties. Glassification is a widely used procedure. In order to conduct the process correctly, the material needs to be heated up to the temperature at which it nearly starts melting. This makes the material much harder. The most obvious application of the procedure is finalization of various ceramic products. Such items need to be hardened without increasing their mass.
Ever wondered how colored granite is being produced? Heat setting is the process of bonding two ingredients together – heat resistant and coating materials. Usually coating is performed by covering the core material with a coating material and bonding them together with a binder. However, some products demand a more robust bounding of coating and the material. Heat setting is conducted in a rotary kiln where the coating material is being heated to the temperature close to melting and the bond between the core material and the coating is strengthened. The resulting coating is much more secure than traditional coating. Popular granite granules that we use for roofing are made via heat setting in a rotary kiln.
There are other industrial applications for rotary kilns and you may be surprised by the versatility of this equipment. If you think that your facility is ready for manufacturing new products and/or efficiently processing various types of waste, make sure to contact Strommachina specialists today! We will gladly provide you with extensive information about the most efficient ways of using rotary kilns.