CoorsTek and Deltapore Showcase Benefits of Hollow Ceramic Core Membrane Filtration
According to CoorsTek, the technology removes very small particles, inferior to 2 microns, compared to traditional centrifuge technology.
CoorsTek and Deltapore, an industrial water treatment company, recently conducted a series of on-site field tests to compare the quality of coolant fluids using traditional centrifuge filtration vs. ceramic hollow fiber membrane technology. The results reportedly showed more than 80% removal of swarf when using hollow ceramic coolant filtration. According to CoorsTek, the technology removes very small particles, inferior to 2 microns, compared to traditional centrifuge technology.
The use of poor-quality coolant filters can reportedly lead to a range of major problems, such as the accumulation of fines and abrasive particles in the coolant fluid. This buildup reduces the quality of machined parts and leads to accelerated wear throughout the machinery, causing damage to the pump, nozzles, and even potentially to the machine tool. In addition, the quality of the machine coolants and cutting oils can deteriorate rapidly due to the constant contact with bacteria, metal fines, and other waste. The presence of swarf in the coolant fluid can also be a source of bacterial growth. As a result, the coolant fluids get contaminated and lose their lubricating capabilities over time.
“Hollow fiber ceramic membranes combine the benefits of ceramic material with a unique geometry, ensuring high capacity and easy cleaning due to the very thin coating layer of few millimeters on the surface of each tube,” said Andreas Schneider, CoorsTek executive vice president, Europe. “As a result, the coolant fluid passes by less ceramic material compared to other geometries, such as multichannel membranes.”
The high permeability of the membranes reportedly allows for a compact unit to treat high volumes of coolant fluids. Due to the low pressure needed and the low cross-flow velocity, very little heat is transferred from the membrane unit to the coolant. This is important, as an increase in temperature can have a negative impact on tooling and precision machines. The smooth internal surface of the hollow fibers prevents the particles, bacteria and other material from adhering to the membrane surfaces.