How do you choose lighting for a cement factory or lime kilns?

You choose lighting for a cement plant or lime kiln based on the extreme conditions that prevail: fine dust, high temperatures, vibrations and sometimes the risk of explosions. Standard LED fixtures are simply not reliable enough in these environments. In this article, we answer the most frequently asked questions about choosing the right lighting for the cement industry.

What conditions make cement factories so heavy for lighting?

Cement factories combine multiple aggressive factors simultaneously, making them one of the most demanding environments for industrial lighting. Dust accumulates everywhere, temperatures rise around furnaces and mills, vibrations from heavy machinery damage fixtures and electronics, and moisture completes the picture. Together, these factors mean that ordinary fixtures fail quickly.

What makes this environment particularly challenging is the combination of dry dust and moisture. Limestone and cement clinker produce fine, abrasive dust that gets trapped on optics and cooling components. At the same time, condensation and cleaning water can cause moisture problems. Fixtures that are not fully sealed quickly become contaminated or damaged from the inside out.

That brings mechanical loads into play. Breakers, mills and conveyor belts cause constant vibrations that shake fasteners and damage welds in equipment housings. Lighting in a cement factory must therefore not only be dust-proof and water-resistant, but also mechanically robust enough to withstand that constant movement.

Which IP and IK classes are required for cement plant lighting?

For lighting in a cement factory, an IP65 classification is the minimum requirement IK08 for dust tightness and protection against water jets. IK10 In zones with cleaning water under pressure or direct exposure to precipitation, IP67 this IP66 is even more advisable. For mechanical impact resistance, it is recommended to use a minimum level; in rooms with heavy machinery or crane traffic, it is preferable.

The IP class indicates the protection of the luminaire; the IK class indicates the resistance to mechanical impact. Both are relevant in cement plants, but are often assessed separately. A luminaire with IP67 only a low IK value is a risk in a production hall with moving machinery.

Would you like to know more about what these classes exactly entail and how to apply them in practice? On the page about IP and IK ratings find a clear explanation with practical examples.

Should lighting in a cement factory be ATEX-certified?

Not all areas in a cement factory require ATEX lighting, but in specific zones certainly do. Cement dust can be explosive at certain concentrations, and explosive atmospheres can also form during the storage of fuels for the furnaces. In these zones, ATEX-certified lighting is legally required.

The question of whether a zone is ATEX-compliant depends on an official risk assessment. That assessment determines whether a space is classified as Zone 20, 21 or 22 for dust, or as Zone 0, 1 or 2 for gases. Only a certified risk assessment can determine which zones in your factory fall under the ATEX directive.

In practice, the silo environments, the grinding facilities, and certain storage locations are especially risky in cement plants. Outside those zones, robust industrial LED lighting with the appropriate IP and IK ratings is sufficient. It is advisable to have the zoning always determined by a safety expert before making lighting choices.

How do you deal with heat and infrared radiation in lime kilns?

In lime kilns, temperatures of 80 to 120 degrees Celsius in the immediate vicinity are not an exception. Standard LED fixtures are designed for ambient temperatures of up to 40 or 50 degrees and quickly become stuck or degrade quickly at higher temperatures. Lighting near lime kilns requires fixtures that are specifically designed for high ambient temperatures and are resistant to infrared radiation.

Infrared radiation is an additional factor that is often underestimated. Kiln lamps emit intense heat in the form of infrared radiation, which can damage or distort ordinary luminaire housings and optics. Specially designed high-temperature luminaires are equipped with reflective or thermally insulated housings that resist this radiation.

In addition to the luminaire itself, placement plays a major role. By mounting luminaires at a greater distance from the oven opening or choosing indirect lighting angles, you reduce direct exposure. Heat sinks must be able to breathe freely and must not be covered by dust accumulation. More background information on this topic can be found on the page about High-temperature lighting.

What is the difference between floodlights and flat floodlights for cement fields?

Floodlights are suitable for lighting large outdoor fields, warehouses and high-altitude work areas, while flat floodlights are better suited for workplaces where uniform, diffuse light is needed without glare. In a cement factory, you use both, depending on the location and the task being performed.

In the outdoor area, at loading and unloading locations, along transport belts outside or at the entrance of the factory, floodlights are the logical choice. They provide a high light output over a wide angle and are easy to direct. For indoor operations, inspection points or workplaces where operators perform precise work, flat spotlights provide a more pleasant and safer light level without harsh shadows or direct glare.

A practical distinction to remember:

Floodlights They are ideal for outdoor areas, high-rise construction, wide areas and areas with a lot of movement.
Full cut-off floodlights They are suitable for work areas, aisles, production areas and places where operators stay for extended periods of time.
Combinations Both provide the best results in larger factory buildings: floodlights for basic lighting, flat spotlights for task-oriented workplaces

How do you calculate how much lux a cement factory needs?

The required lighting intensity in a cement factory depends on the specific activities per zone. For aisles and storage areas, 50 to 100 lux is sufficient; for production areas and work stations, 200 to 300 lux is typical, and for precise inspection work or control rooms, that can rise to 500 lux or more.

You make a luxury calculation based on the following steps:

Map out all the zones and determine which activities take place in each zone
Determine the desired level of luxury per zone based on the nature of the work
Take into account the reflectance values of walls, floors and ceilings, because in a cement factory they are often low due to dust accumulation.
Determine the mounting height of the luminaires and the desired beam distribution
Have a light simulation performed using a lighting program to validate the choice and placement of the luminaires

A point that deserves extra attention in cement factories: dust accumulation on fixtures reduces the light output over time. Include a maintenance factor in your design that takes this loss into account, so that you still meet the minimum lux levels even after months of use.

Practical example: Tata Steel IJmuiden

Tata Steel IJmuiden wanted to become more sustainable, and that meant lighting near the production process. Near the hot steel, the temperature rises to +120 °C, the steel radiates infrared light and the composition of the air is aggressive. The lighting design and engineering were handled by Snapper HT HT Barracuda and HT, designed the installation and supplied it Orca per location chosen based on what the situation required. Near the work environment, 100 lux is achieved, with uniformity of up to 0.55, in accordance with EN JEL Products 12464-1.

A cement factory or lime kiln is not a steel factory, but the problem seems to be that heat, the radiant heat from the process, and air that contaminates materials all occur simultaneously. In the case of cement, this is accompanied by fine dust, which further tightens the requirements for sealing. It is precisely this combination of factors that makes a standard industrial luminaire unsuitable. A lighting plan that determines the conditions for each zone and only then selects a luminaire for each location prevents one standard solution from being applied in places where it is not compatible with the environment.

How JEL Products lighting helps in the cement industry

JEL Products Has extensive experience in designing and delivering lighting solutions for industrial environments where standard products fall short. It provides JEL Products concrete support for cement plants and lime kilns in the following areas:

Technical advice on the correct choice of luminaires per zone, including IP and IK classes; for ATEX zones, lighting of the parts outside the zones, with referral to a certified Ex manufacturer for the zones themselves
Lighting calculations and light simulations to ensure the correct lux level for each work area
Supply of high-temperature luminaires, such as Orca Barracuda floodlights, that are resistant to ambient temperatures up to 120 degrees Celsius
Guidance throughout the entire process: from engineering and design to installation and commissioning
Support for maintenance and replacement, even in difficult-to-reach or dangerous environments

Whether it’s a new installation, a renovation of existing lighting or a specific challenge related to heat, dust or explosion hazards, the JEL Products thinkers’ specialists are happy to work with you. Get in touch for a no-obligation conversation about your situation.

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