脱墨浆生产的趋势是通过降低能耗和简化脱墨工艺以提高效益。然而,鉴于环境保护和经济效益的压力,以及对最终产品质量要求的提高,却使得脱墨浆生产工艺越来越复杂,产品成本不断增加。基于纤维分级的脱墨浆生产(将脱墨浆纤维筛分为长纤维级分和短纤维级分)或许可以成为改善成纸质量、提高脱墨浆生产工艺成本效率的一种方法。该研究通过测定长、短纤维级分的白度、油墨及灰分含量以发现回用纤维浆中纤维的光学性能变化;纤维级分的性能用通过率和可选择性表征。研究表明,废纸浆脱墨处理前,先用压力筛将纤维分级,而后只对短纤维级分进行浮选,对长纤维级分进行分离,与传统的脱墨浆生产工艺相比,可以降低能耗以及化学品的用量。 The trend in deinked pulp production is to increase efficiency by reducing energy consumption and simplifying the deinking process. However, in view of the pressure of environmental protection and economic benefits and the improvement of the quality requirements of final products, the manufacturing process of deinked pulp has become more complicated and the cost of products has been continuously increased. Deinking pulp production based on fiber fractionation (screening of deinked pulp fibers into long fiber fractions and staple fiber fractions) may be a way to improve paper quality and increase the cost efficiency of the deinking pulp production process. The study determined the optical properties of the fibers in the recycled fiber pulp by measuring the whiteness, ink and ash content of the long and short fiber fractions; the performance of the fiber fraction was characterized by throughput and selectivity. The research shows that before deinking waste paper, the fibers are first classified by pressure sieve, and then only the short fiber fraction is flotation, the long fiber fraction is separated, which can be reduced compared with the traditional deinking pulp production process Energy consumption and chemical consumption.