Innovative and sustainable solutions for dust reduction in the steel industry

PNR Italia helps to recover waste materials from steel production

Innovative and sustainable solutions for dust reduction in the steel industry

PNR Italia helps to recover waste materials from steel production

SCENARIO FOR THE SECTOR
Cooling and dust reduction in steelworks

In the steel production process, handling the slag is a critical phase in which the dust generated during the various processing stages can be dispersed in the environment. Slag is a by-product of the iron ore smelting and processing process for steel production, and its transport within steelworks can cause significant dust emissions.

During the slag’s handling, fine particles are lifted into the air and transported by the wind, contributing to atmospheric contamination in the surrounding area.

These powders contain calcium, aluminum magnesium oxides, and other contaminants that can negatively impact air quality and environmental safety.

THE PROBLEM

Our customer contacted us to meet different needs.

First, he needed to effectively limit the dispersion of white slag dust (or ladle slag) in the media discharge area; secondly, he had to cool the same by wetting that area as evenly as possible.

The request was that the water distribution during spraying not exceed a specific limit to avoid the risk of implosion below the surface level.

Last but not least, there was the need to recover the waste used in small parts in the same process, mostly recycled in the construction sector.

THE SOLUTION

We have proposed a spraying system with wall pipes that uses two different types of product: our E series full cone nozzles and the J series flat fan nozzles, two effective solutions to address the particular needs related to the cooling and handling of white slag, with the resulting problems.

The tubes are arranged in a mirror-like manner at a height between two and three meters above the containment wall of the slag discharge area to prevent damage to the pipes caused by the heat of the slag.

We placed the E nozzles with a parallel jet to the retaining wall to cool the surface close to the wall and prevent any reinforced concrete failure over time.
In turn, the J nozzles with adequate inclination allow a longer spraying radius (more than 2.5 meters) to extend the wetting to the entire discharge area, cooling the slag farthest from the pipes.

VIEW FROM ABOVE

LATERAL VIEW

ADVANTAGES

Thanks to our solution, the customer has gained two significant advantages.

Firstly, a better distribution of the liquid in the slag humidification system, thanks to an adequate drop distribution.
The second advantage was reducing and cooling white slag dust, which is mainly composed of silicon oxide and is usually difficult to dispose of.

The combination of flat jet and spiral nozzles, evaluated based on the distances covered during wetting, is an effective solution to ensure a safe and respectful working environment and more efficient waste recycling.

FOCUS ON THE PRODUCTS

J
FLAT FAN NOZZLES

J series standard flat fan nozzles are available in various capacities, spray angles, thread sizes, and materials. Used in several industrial applications, they produce a mist spray and supply an appropriate force of impact.

E
FULL CONE NOZZLES

E series full cone nozzle works on the impact principle by deflection of a water stream that impacts onto a spiral profiled surface, providing the desired spray angle. These are one-piece nozzles with no internal vane and a more comprehensive free passage.

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