# Delavan Spray Technologies
# Continually meeting the challenges of new industries and markets
The continuous casting of metals is a relatively new process in the steel industry, but tremendous strides in development have been made in recent years. In the constant pursuit of technological advancements, Delavan’s engineering staff have worked with steel mills world-wide to implement many improvements in the casting process.
# Better Cooling With Less Water
The result of much research and development is the Delavan Cool-Cast nozzle, which with its tightly uniform droplet size can significantly improve slab quality and reduce energy costs in your continuous casting operation. The table below provides an illustration of the typical droplet sizes.
Producing steel in today’s market from slabs to bar mills including secondary cooling during the casting process requires efficient spray nozzles. Delavan2s newest ’91Block Style’92 Cool-Cast nozzle offers flexibility in alignment for tight space in-between the framed segments. The ability to use quick connect couplings with the parallel piping gives operators access to quick release nozzles during rebuilds. With interchangeable components, liquid and air can be easily adjusted to meet product changes for various grades of products. The all stainless steel construction extends the durability and life of the nozzle in harsh environments. Typically Cool-Cast nozzles produce results using less air than other types, further reducing cost of ownership. The ’91Block Style’92 Cool-Cast nozzle has different thread sizes and liquid connections to avoid misalignment.
Our specialist design teams can also provide customised designs for your own applications, contact our sales team on +44 (0)151 424 6821 or inside USA Toll Free: 1-800 Delavan for more information.
# Cool-Cast Spray Characteristics
The patented nozzle design (US Patent 6036116) produces a spray pattern with highly uniform droplets. This makes the cooling process more controllable, with reduced tendency for water puddling and localized uneven cooling or thermally induced roller deflection. The flat spray pattern is thick, even over angles from 60’b0 to 120’b0, offering good coverage with few nozzles.
The Cool-Cast design consumes less air than conventional nozzles, which saves energy usage through reduced air compressor load.
Block Version (CCB)
USA Patent Application 11/736810
European Patent Application EP07251261.9
Patent Application in Japan 2007-108565
# Block Design Features
– Inlet connections are parallel ’96 there are no elbows required for product installation
– Easier maintenance ’96 nozzles always go back into original installation, no re-alignment is necessary
– Fluid orifice can be removed and cleaned/replaced without removing nozzle assembly
– More robust ’96 less joints
– Easier installation
– Patented fluid inlet can permit larger orifice sizes for equivalent flow rates
The original round design of the Cool-Cast nozzle has a lower initial capital cost than the block design, yet still provides the same outstanding spray cooling performance and operational characteristics of the Block version.
A full range of nozzles in different sizes are available for both assembly types and figures are available further in this brochure showing the relevant air consumption and liquid flow rates at a range of air and liquid pressures.
Data contained in this brochure is for guidance only. Normal manufacturing tolerances are +/- 5%.
# Cool-Cast Advantages
– Patented nozzle design which produces highly uniform droplets with constant surface area per given spray volume
– More controllable and even cooling characteristics
– Reduced air consumption, saving energy through reduced air compressor load
– Wide passages prevent plugging
– Maximum heat transfer
– Large turn-down ratio
– Constant spray angle over wide pressure range
# How To Select A Nozzle
Below is a table showing the various options available to help when deciding which nozzle is right for your application. On the following pages are capacity charts showing the relevant air consumption and liquid flow rates at a range of air and liquid pressures corresponding to the flow rates shown below. Please be aware that the data in the charts shown on pages 7-9 was generated on Delavan test equipment. Actual figures may differ due to the effects of the local installation.
# Other Delavan nozzles used in Continuous Casting:
Flat Spray ’96 AC, LF, LD, AD, LE
Solid Cone Spray ’96 BI, BN, BQ, BT, BC
The Delavan RLD Flat Spray Nozzle has been designed for use in Hydraulic Continuous Casting Machines. The internal design of the nozzle provides a thicker spray footprint, thus resulting in an increased cooling efficiency over a standard flat spray nozzle.
The nozzle also includes a built in location fitting to eliminate incorrect alignment. Flow rates are available from 4-18 LPM (1-4.8 USGPM) at 2.8 BAR (40 PSI) with a spray angle of 80’ba.
For more information contact the Delavan Sales Team.
Details of all our products are available on our website at www.delavan.com}