Rotary kiln
2025-09-22
I. Basic Information: Application and Purpose: Exclusive use for cement plants. Packaging: Sea freight. Automation Level: Based on customer requirements. Origin: China. Customization Services: Available for customization. II. Main Structure and Function: The structural components of the rotary kiln equipment mainly include: kiln body, rolling ring (tyre), supporting roller and supporting roller shaft (supporting part), retaining wheel, transmission device, head and tail sealing devices.
Structural characteristics of kiln equipment: 1. The shell of the rotary kiln equipment is rolled from 20g and Q235-B steel plates that ensure five mechanical properties, and automatic welding is typically used. The wall thickness of the shell is generally 25mm, with 32mm in the sintering zone, 65mm under the tire, and a 38mm thick transition section from under the tire to the span. This makes the design of the shell more reasonable, ensuring both the rigidity of the cross-section and improving the stress state of the supporting device. At the discharge end of the shell, there is a high-temperature and wear-resistant kiln mouth guard plate, and the kiln tail end of the shell is made of one-meter-long 1Cr18Ni9Ti steel plate. The kiln head guard plate and the cold air jacket form a gridded sleeve space, where cold air is blown from the bellmouth into the shell to cool the non-working surface of the kiln head guard plate, which is beneficial for long-term safe operation of this part. Three rectangular solid tires are fitted on the shell. The gap between the tire and the shell pad is determined by thermal expansion. When the kiln is operating normally, the tire can fit moderately on the shell to reduce radial deformation of the shell.
2. The rotary kiln equipment drive system employs a single drive, where a variable frequency motor drives a hardened tooth surface three-stage cylindrical gear reducer, which in turn drives the kiln's open gear pair. This drive device utilizes a rubber block coupling to enhance the smoothness of the transmission. An auxiliary drive device connected to an emergency power supply is provided to ensure kiln operation during a main power supply interruption, prevent cylinder bending, and facilitate maintenance.
3. The rotary kiln head seal utilizes a double-layer flexible sealing device consisting of a shell air seal and a labyrinth seal combined with spring-loaded rigid plates. An appropriate amount of cold air is blown through a bellmouth to cool the protective plate, and the heated cold air is expelled from the top. The overlapping heat-resistant spring steel plates press down on the flexible sealing plate, which in turn compresses the cold air sleeve, ensuring that the seal remains effective even when there is slight deflection of the kiln head cylinder.
4. The rotary kiln equipment utilizes a flexible seal consisting of steel sheets and graphite for the kiln tail sealing. This device is easy and convenient to install, and safe and reliable to use.
III. Applications: Building Materials, Metallurgical Chemicals, Environmental Protection, etc. The rotary kiln refers to a rotary calcining kiln (commonly known as a rotary kiln), which is shaped like a rotating bed and is also called a rotary bed kiln. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns, and lime kilns based on the materials they handle. Cement kilns are mainly used for calcining cement clinker and are divided into two major categories: dry process cement kilns and wet process cement kilns. Metallurgical chemical kilns are mainly used for magnetizing roasting of lean iron ore in steel plants in the metallurgical industry; oxidizing roasting of chromium and nickel iron ore; roasting of high-alumina bauxite in refractory material plants, roasting of clinker and aluminum hydroxide in aluminum plants; and roasting of chromite sand and chromite powder in chemical plants. Lime kilns (i.e., active lime kilns) are used for roasting active lime and lightly burned dolomite used in steel plants and ferroalloy plants.
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