Stelter & Brinck Blog

Direct Fired Heating in Cement Industry

Originally created in the 1840s, cement has become a keystone product in our society today- it is used to build sidewalks, buildings, streets, parking lots, houses, and much more. Cement production can be done one of three ways: dry, semi-dry or wet processing of various ores to produce a mixture of minerals.

The Manufacturing Process

Regardless of whether the ores are dry or wet, the process is as follows:

  1. Quarry the shale, limestone, silica and iron oxides.
  2. Crush and mix the minerals.
  3. Run the mixture through a rotary kiln. The picture below illustrates this step in the wet process. If the material is dry, it is first preheated.

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Reliable Combustion Equipment?

Is your combustion equipment reliable? Backed by our engineering department, our team of experienced field technicians can bring your equipment up to today’s standards and codes through rebuilds, retrofitting, repairs or upgrades.

Examples of equipment upgrades or repairs Stelter & Brinck can help you with:


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Direct Fired Vs Indirect Fired?

What is the technical difference between direct fired and indirect fired? In terms of process air heaters, what are the features, benefits and applications of direct fired vs indirect fired?


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Low-NOx Process Heat Equipment

NOx is a greenhouse gas formed during the combustion of fossil fuel and tends to increase with higher temperatures. NOx emissions interact with atmospheric gases to produce low air quality, acid rain, vision and respiratory problems for humans, and destroy plant life.

Because of their ill effects, the Environmental Protection Agency (EPA) regulates NOx and other emissions produced by manufacturing facilities.  In order to comply with the EPA’s standards, and be socially responsible, most companies implement emissions programs; these companies continually focus efforts on ways to reduce their emissions levels, while improving their bottom line.


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