METHOD OF SELECTING WOOD FOR MECHANICAL PULPING

摘要

A method of selecting bulk wood units for mechanical pulping, which consists of establishing a reference scale by selecting a test sample, measuring the acoustic velocity through each sample unit, selecting acoustic velocity bands from the sample results, processing the sample units using known mechanical pulping processes, testing the resulting pulp to measure the freeness of the pulp, and then graphing the pulping energy measurements against the pulp freeness measurements for each of the velocity bands to produce a reference scale; measuring the acoustic velocity through each of the units, comparing the velocity measurement for each unit against the reference scale, and then dividing the tested units into subgroups according to the predicted mechanical pulping energy.