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Water filtration in steel works

Water filtration in continuous casting process

Continuous casting is the process whereby molten metal is solidified into a "semifinished" slab for subsequent rolling in the finishing mills. Using a continuous casting process, the stainless steel is produced for a huge variety of applications from car exhausts to aerospace components.

Low casting temperatures combined with the chill mold and directional solidification inherent in this process promote a homogeneous, fine-grained, high-density product with high yield.

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.

Your Benefits:

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

Water filtration for the cooling water at the roll mill

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 to make the thickness uniform. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products.

The fundamentals for efficient and economical roll cooling are an optimized nozzle and header arrangement. In the process of rolling the most significant aspect is the generation of heat through friction and deformation in the roll bite.

The most important aspect is maintaining uniform, stable roll temperatures.

Establishing a uniform homogenous cooling across the rolling width with a uniform and acceptable thermal distribution (no gradients) is the ultimate goal as regards cooling and assures that the universal problem of post cooled shape after recoil is minimized.

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

Preview Image: North American Cold Mills
North American Cold Mills »

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

Preview Image: Outokumpu
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.


Preview Image: Tata Steel Slab
Tata Steel Slab »

Tata Steel Slab trusts BOLLFILTER for the filtration of raw water and cooling water of the continuous slab caster.


Preview Image: Thamesteel
Thamesteel »

Elimination of contaminants and mill scale with BOLLFILTER solutions for roll coolant.

Individual platform concept ✓ Minimal operating costs ✓ Adaptive filtration configurations ✓ Multi-part housing construction ✓ Various housing materials ▶ Find out more!
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