A cable mill located in the province of Quebec uses a belt filter with a polyester spunbond media for its coolant emulsion filtration. When changing the emulsion for a fresh one, the laden emulsion is sent to an ultrafiltration system to filter out as much particles as possible before being sent out to the effluent sector.
The ultrafiltration membranes lasted only a few months, which was a lot shorter lifespan than expected. STS Canada was assigned the task to reduced the particle load in the emulsion as much as possible and consequently increase the membrane's lifetime.
This ultrafiltration is sensitive to fouling from solid particles because the membrane's pores are extremely small and easy to clog. Also, the recommended system should handle at least the same flow as the system in place.
STS Canada performed laboratory testing on belt filter adapted membranes in order to sort out which was best suited for its client. Optimization of the parameters was achieved to reduce the quantity of solid particles in the emulsion all the while maintaining an appropriate flow to the belt filter.
Aluminum Cable rolling mill
Analytical assessment, interpretation of results and recommendations