EFFECT OF FEED RATE ON REFINING

Experimental results obtained in pilot plant and commercial trials are reviewed. The experiments were carried out with single- and double-di sc refiners operating in different modes; single-stage RMP conventiona l two-stage TMP, and two-stage pressurized TMP The results showed that , at constant rotational speed, changes in feed rate do not under norm al conditions affect the energy-quality relationship. It is only when the plate clearance becomes excessively small that energy consumption to a given freeness decreases and pulp quality becomes inferior The re sults also showed that the effect of rotational speed on the specific energy-pulp quality relationship is independent of feed rate.