云南松—兰桉混合蒸煮制浆的研究

Pulp-making through steaming and boiling of Pinus yunnanensis and Eucalyplus globulus labill

根据云南松、兰桉的化学成分、组织结构,选择出蒸煮的工艺路线,并进行了云南松、兰桉按不同比例混合蒸煮的实验研究,发现云南松—兰桉混合制浆是可行的。按常规硫酸盐蒸煮以兰桉占60%为好,最佳工艺为170—150—23—20(最高温度—保温时间—硫化度—用碱量),而按改良的硫酸盐蒸煮(利用深度脱木素技术的蒸煮),在显著降低成浆的K值(高酸钾值)的同时,浆的得率比常规硫酸盐蒸煮提高(平均提高2%-3%),合适的兰桉比例为50%、60%、70%,较好的工艺为165—150—23—25。

In the first place, the feasibility was analyzed according to the chemical components and structures of Pinus yunnanensis and Eucalyplus globulus labill, and then a technical process was designed for an experiment of steaming and boiling Pinus yunnanensis and Eucalyplus globulus labiU at different proportions. It was found that it was feasible to combine them to make pulp. With the normal sulfate, Eucalyplus globulus labill is better to be 60%, and the optimal technology proportion is 170, 150, 23 and 20（maximum temperature, time of heat preservation, degree of sulfaration and amount of alkali）. With the modified sulfate cooking, the acquisition of pulp increases significantly with kappa number pulp decreasing （increased 2-3% on average）, and the proper proportion is 50%, 60% and 70%, the better technology being 165-150-23-25.