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研究氧化还原两段漂白中还原漂剂FAS对混合废纸脱墨浆的漂白效果。在H2O2预漂白处理浆料的基础上,加入FAS进行还原漂白,探讨漂白温度、漂白时间以及FAS用量对浆料白度的影响。结果表明:在碱比0.4、FAS用量0.6%、浆浓8%、时间40min,温度75℃的条件下,漂白效果、生产成本达到最佳条件。
The bleaching effect of mixed waste paper deinked pulp with redox bleaching agent FAS was studied in two stages of redox bleaching. On the basis of H2O2 pre-bleaching slurry, adding FAS for reducing bleaching, and discussing bleaching temperature, bleaching time and the amount of FAS on pulp whiteness. The results showed that under the conditions of alkali ratio 0.4, FAS 0.6%, pulp concentration 8%, time 40min and temperature 75 ℃, the bleaching effect and the production cost reached the optimum conditions.