Working Principle of Rotary Kiln-Henan Dingxin Equipment Technology Co., Ltd._Rotary Kiln

Working Principle of Rotary Kiln

2024-05-28

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A rotary kiln is a cylindrical container that slowly rotates around its axis while being slightly tilted. The material is fed into the upper end of the kiln and moves to the lower end under the heating and drying action of the hot gases flowing through the kiln.

The working principle of a rotary kiln is based on a heat transfer process. The material is heated by the hot gases in the kiln and undergoes various physical and chemical changes as it moves through different zones in the kiln.

The material enters the kiln from the upper end and comes into contact with the hot gases produced by the combustion of fuel at the lower end of the kiln. As the material moves downward in the kiln, it is gradually heated and reaches higher temperatures in the combustion zone.

In the combustion zone, the material is exposed to higher temperatures and chemical reactions such as calcination occur, where carbonates are broken down and oxides are formed. The material is converted here into clinker, which is an intermediate product in the production of cement.

After the material leaves the incineration zone, it enters the cooling zone where it is cooled by the incoming air. The cooled material is discharged from the lower end of the kiln and can be further processed or stored for future use.

The rotation of the kiln helps ensure that the material is evenly heated and dried as it passes through different zones of the kiln. The slight angle of the kiln also helps to facilitate the movement of material from the top to the bottom.

In summary, the working principle of the rotary kiln is based on the heat transfer process, which heats and dries the material through the hot gases flowing through the kiln. The rotation and tilt of the kiln ensure that the material is evenly heated and processed as it passes through different areas of the kiln.

The structure of rotary kiln

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The structure of rotary kiln

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Henan Dingxin Equipment Technology Co., Ltd. (formerly Zhengzhou Yongxin Heavy Industry) is located in Gaoshan Town, Xingyang City, Zhengzhou City. It has focused on the research and development and manufacturing of rotary kilns for over ten years, mainly providing high-quality and efficient production equipment for the mining, building materials, metallurgy, and environmental protection industries. Main products include rotary kilns, suspension flash calciners, ball mills, dryers, coolers, and lifting and conveying equipment. The company has a 20,000-square-meter modern processing workshop and a technical team with 30 years of industry experience. It has in-depth cooperation with top scientific research institutions such as Professor Li's team at Central South University and Teacher Liu's team at Beijing Research Institute of Iron and Steel, achieving a number of patented technological breakthroughs in the fields of tailings resource utilization and iron ore powder calcination. In April 2025, the company completed the construction of a domestically leading pilot test kiln. With "high efficiency and energy saving + intelligent control" as its core, it provides process parameter verification, ratio optimization, and feasibility study services for scientific research units and enterprise customers, guaranteeing customer investment safety from the source and promoting the efficient transformation of technological achievements.