Rotary Kiln
Introduction
The Rotary Kiln is a high-temperature pyro-processing system used for the calcination and thermal treatment of solid materials in continuous industrial production. It raises materials to high temperatures through a controlled heating process, enabling mechanical, physical, or chemical transformation across a wide range of industrial applications.
Henan Innovative Industry manufactures Rotary Kilns for cement clinker calcination, active lime production, light burned dolomite processing, bauxite and aluminium hydroxide calcination, and chromite ore processing. Our kilns are engineered to meet the specific feed material characteristics, required production capacity, and thermal processing conditions of each client’s operation.
Rotary Kiln Types
Rotary Kilns are classified into three main types based on application:
Cement Rotary Kiln is primarily used for calcining cement clinker and is available in both dry process and wet process configurations depending on the raw material moisture content and plant design requirements.
Metallurgy Rotary Kiln is used for calcining lean iron ore, bauxite, aluminium hydroxide, and chrome ore in ferrous and non-ferrous metal processing operations.
Lime Rotary Kiln is used for producing active lime and light burned dolomite for use in steel plants and ferroalloy factories where high-reactivity lime is required for steelmaking and refining processes.
Application Fields and Range
Application Fields
The Rotary Kiln is widely used across building materials, metallurgy, chemical, and environmental protection industries for the mechanical, physical, and chemical treatment of solid materials at high temperatures.
Application Material
Cement, lime, refractories, metakaolin, titanium dioxide, alumina, vermiculite, and iron ore pellets.
Key Technical Parameters:
Production Capacity: 5.5 to 350 t/h
Kiln Speed: 0.125 to 5.0 r/min
*** These parameters vary based on kiln diameter, length, inclination angle, and the specific material being processed. Final specifications are determined based on your production requirements and material characteristics.
ROTARY KILN STRUCTURE
The Rotary Kiln consists of the following primary components: kiln shell, refractory lining, support tyres and riding rings, support rollers, driving device, supporting device, thrust roller device, kiln head sealing device, kiln tail sealing device, kiln hood, fuel system components, drive gear, and internal heat exchangers.
The kiln shell is a steel cylinder lined with refractory bricks that protect the shell from high-temperature process gases and retain heat within the calcination zone. Support tyres and rollers carry the weight of the rotating shell and maintain precise alignment throughout operation. The thrust roller device controls axial movement of the kiln shell under thermal expansion and process load conditions.
Working Principle
The Rotary Kiln operates as a slightly inclined rotating steel cylinder, typically set at 1 to 5 degrees from horizontal, rotating at between 30 and 250 revolutions per hour depending on the application and required residence time.
Feed material enters the kiln at the upper end. As the kiln rotates, material gradually moves down toward the lower discharge end under gravity, undergoing controlled heating, stirring, and chemical transformation throughout its passage through the kiln.
Hot process gases flow along the kiln length, either in the same direction as the material flow (co-current) or in the opposite direction (counter-current). Counter-current operation is the most common configuration, maximizing heat transfer efficiency between the gas stream and the material being processed.
The heat source is typically a flame projected from a burner pipe at the lower end of the kiln, fueled by gas, oil, pulverized petroleum coke, or pulverized coal depending on the facility and fuel availability.
Vibration Analysis of Rotary Kiln Using Finite Element Method
X-axis
Y-axis
Z-axis
Finite element analysis is used in the design and verification of Rotary Kiln structural integrity. The analysis evaluates vibration behavior across three axes under operational loading conditions, ensuring the kiln shell, support structure, and drive system perform within safe parameters across the full production capacity range.
SPECIFICATION DATA
*** Specification data is provided as a general reference. Final kiln dimensions, capacity, and technical parameters are determined based on your specific material characteristics, required production output, and site conditions. Contact our engineering team for a detailed technical proposal.
LIME KILN SPECIFICATION DATA
GENERAL SPECIFICATION DATA
Looking for a Rotary Kiln for Your Operation?
Tell us your material type, required production capacity, and calcination temperature requirements. Our engineering team will recommend the right Rotary Kiln configuration for your operation.