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Spray nozzles, atomizers and accessories for the steel and metal industry

Spray nozzles, atomizers, and accessories for cooling, pickling, scaling, rolling and heat treatment in the steel and metallurgical industry

PNR Italia products have been used for years in many companies producing steel or metal. These are specific products with the highest precision: nozzles for cooling, lamination, and pickling, nozzles for descaling, dust suppression, and heat treatments on ferrous and non-ferrous metals.

Applications

Dust suppression
Descaling of hot rolled products
Pickling of metal sheet
Cold Rolling and Pickling Process
Flue gas cleaning

Sheet metal washing
Lubrication of cold rolled products
Lubrication of sheet during shearing
Aluminium lamination and colouring
Mixing and stirring of liquids for heat treatment
Coke cooling
Gas cooling
Electrode cooling
Roll cooling
Cooling of the continuous casting
Spraying of release agent in die-casting of aluminium and alloys
Spraying of acid solutions on steel
Heat treatments for ferrous and non-ferrous metals

PNR Italia products for the steel and metallurgical industry are designed to use as little spraying liquid as possible and, consequently, energy while ensuring optimal results. This is how they contribute to reducing emissions from these large plants.
Thanks to our decades of experience and a dedicated sales team, we can support operators in the metallurgical and steel industries at all stages of processing.

Products

Descaling in the steel and metal industry

Descaling nozzles for the steel industry

Cooling in the steel and metal industry

The selection of the most suitable cooling nozzle/atomizer includes a thorough knowledge of the following parameters:

– The amount of heat to cool down;
– The required cooling rate;
– The geometry (shape) of the products that must be cooled down;
– The heat transfer capacity of the product to be cooled.

When the range of products to cool is limited, the choice is more straightforward, but when the range is wide, either because of shape or because of different raw material quality, it is necessary to subdivide the range according to a variety of criteria and resort to a broader choice of nozzles/atomizers. Therefore, the parameters mentioned above should be evaluated for each sub-range. A crucial factor in the choice is also the degree of purity of the coolant that can steer the choice towards a model of a more clog-resistant nozzle/atomizer.

Electrodes cooling

In the electrode cooling process, the geometries and raw material to cool are constant parameters. Yet, some variations could be due to the different electric field intensities between the electrodes. To check the electrode temperature during the melting process, the following hydraulic nozzles are used: J series and K series, flat fan spray, with male connection.

Cooling in continuous casting

In continuous casting, the required cooling parameters are highly variable based on:
– Geometry of the product that must be cooled down;
– Involved casting sector;
– Thermal and metallurgical features of the product that must be cooled down.

We must always bear in mind that an atomizer can operate with a turndown ratio (“Turndown ratio” refers to the width of the operational range of a device and is defined as the ratio of the maximum capacity to minimum capacity at which an atomizer generates a good droplet fragmentation) much broader than that of a hydraulic nozzle and, therefore, allows to cool down a more comprehensive range of products or to provide different cooling curves for the same product.

Rolls cooling

A different assessment must be made depending on whether the roll to cool down:
– is a simple element of the steel-plate conveyance system
– is an essential part of the plastic deformation process
– the tolerances of the operating temperatures are tight.

The flat fan nozzles of the GX, GY, J, and KYA series are the most suitable for this application. Air-blowing nozzles are used for less demanding applications.

Heat treatment in the steel and metal industry

Modern heat treatment technologies in metal working processes are becoming increasingly sophisticated and are mainly focused on optimizing the process by immersion in tanks with the use of educator nozzles that improve the mixing and circulation of the liquid coolant and replacing hydraulic nozzles with atomizing nozzles that provide finer droplets and can significantly increase the rate of heat exchange.

Heat treatment on ferrous metals

Modern technologies for heat treatment of metals involve the use of:
– Full cone nozzles and flat fan nozzles, with the appropriate spray angle and flow rate, for direct impact of the cooling liquid on the hot metal: D series, D..OB series, D..PB series;
– Full cone, circular or oval spray pattern atomizers for more demanding industrial applications: MN series, MO series;
– Mixing eductors that increase the flow rate of submerged nozzles when the heat treatment is made by immersion of the hot metal into a quenching tank.

Heat treatment on non-ferrous metals

The heat treatment of non-ferrous metals is usually made at lower temperatures, but the nozzles used in this process are more or less the same as those used for ferrous metals heat treatment. The flat fan nozzle of the J series is suitable for less demanding applications.

Dust suppression in the steel and metal industry

For an effective dust suppression, it is necessary to know precisely the particle size of the pollutants to remove. The need to reduce the dust generated during the production process or caused by the volatility of raw materials in stock is met with various ranges of nozzles, depending on the type of attack required, the kind of spray, and the flow rate.

Fog cannons for dust and odor suppression

Do you want to know more about PNR Italia fog cannons?
Our range of cannons for the abatement of dust and odors can meet every operational need in every application.

Cold rolling and pickling in the steel and metal industry

The surface treatment of steel sheets and cold rolling processes are done at room temperature and do not require particularly fine droplets. However, strict attention must be paid to the uniformity of the spray distribution pattern on the target surface.

Case studies related

Dust suppression nozzles in the steel industry

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