Differences between Rotary Kiln & Vertical Kiln
Release Date: 2016.07.06 Views:

There are two main types of lime calcination system: rotary kiln and vertical kiln. Both rotary kiln and vertical kiln have their advantages and disadvantages. The investors need to make a comparison between these two ways. The professional manufacturer will assist the investors to choose the suitable type on basis of their benefit and requirement. The following factors are required to consider before making the decision.

Differences between rotary kiln & vertical kiln

1. Particle size of limestone

The lime calcination system may adopt the rotary kiln or vertical kiln. Two kinds of kiln type size have different requirements of the lime granularity: rotary kiln is 10 ~ 40mm, vertical kiln is 40 ~ 180mm.

2. Fuel

Rotary kiln fuel can be use the solid fuel, gas, coal bed gas, oil, etc.. The solid fuel is mainly coal, which can be gasified into the coal gas, or grind to 200 mesh of pulverized coal.

3. Energy consumption

Energy saving and environmental protection rotary kiln with the vertical preheater and cooler: 1250 ~ 1350kcal/kg lime

Traditional rotary kiln with single cooler: 2450 ~ 2550 kcal/kg lime

Vertical kiln with double chamber: 900 ~ 1000 kcal/kg lime

4. Equipment selection

For the rotary kiln and shaft kiln, it is generally believed that the quality of lime produced by rotary kiln is best and limestone with smaller particle size can be calcined. The lime produced by vertical kiln is generally slightly lower than rotary kiln.

Shaft kiln can be used with low heat value fuel in order to make full use of secondary energy metallurgy factory, with small occupation of land, low investment, heat consumption, low power consumption, the quality of the products can also meet the requirements of production. From the successful cases of vertical kiln, the quality can meet the requirements of metallurgical production. But the general structure is more complex than rotary kiln, therefore it has a higher requirements for the operation, compared with the rotary kiln.

Rotary kiln mainly has the following advantages: simple structure, less operating expenses, less operators, easy to control the production, the operation rate up to 90%, high quality of finished products, low rotary kiln tail waste air temperature, which is generally below 250 degrees Celsius, therefore there is no problem of the utilization of the waste heat.

Rotary kiln has already produced in domestic for many years, therefore it became mature from the technology and production operations. It has always been the preferred equipment for lime calcination. Henan Zhengzhou Mining Machinery Co. Ltd has been devoted to improve the rotary kiln and vertical kiln, provide the tailored solution for customers, which also has made a great progress in this filed. For more information, please do not hesitate to email us at info@inczk.com or call us at +86-755-55902868.

 

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