Water filtration in steel works

Water filtration in continuous casting process

Continuous casting is the process through which molten metal is solidified into a "semifinished" slab which can then be rolled in the finishing mills. Using a continuous casting process, the stainless steel is produced for a wide variety of applications.

The low casting temperatures as well as the chill mold and directional solidification result in a homogeneous, fine-grained, high-density product with high yield.

Your Benefits:

Downtime reduction
Less maintenance cost
BOLLFILTER protects nozzles and contributes to the efficiency of the process

Spraying nozzle protection with pre-filter

BOLLFILTERs like the aquaBoll^® are used to protect the spray water nozzles of the cooling zones. By prefiltering the water used, they prevent particles from entering the system and clogging the nozzles.

BOLLFILTER Automatic features a unique backflush process that enables to operate without regular cleaning or maintenance – making them ideal for continuous manufacturing processes such as steel-making.

By using BOLLFILTER automatic filters for the protection of spraying nozzles, there is no need to stop casting production for the clearance of the blocked nozzles.

In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and create an overall uniform thickness. Steel mills have a rolling mill division which converts the semi-finished casting products into finished products. The rolling process can be classified into two different processes, hot rolling, or cold rolling, depending on the temperature of the metal rolled. The fundamentals for efficient and economical roll cooling are an optimized nozzle and header arrangement.

BOLLFILTERs like the aquaBoll^® help to reduce the high maintenance and downtime cost by preventing the spray nozzle blockages of cooling water systems.

24. - 27. September 2025 METAL EXPO

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References

North American Cold Mills »

Elimination of pockmarks and surface imperfections with BOLLFILTER solutions for roll coolant emulsion.

Outokumpu »

Outokumpu trusts BOLLFILTER for the filtration of the cooling water in its continuous casting line. With automatic filtration, manpower for maintenance was saved and continuous operation guaranteed.