碱法化学制浆—氧化铝联产处理黑液新工艺

A new technology of black liquor treatment by combination of alkaline pulping and aluminum oxide

介绍碱法化学制浆造纸与氧化铝联产,在传统碱回收系统取消黑液燃烧工段,将适当浓度的黑液直接泵入氧化铝厂作为炼铝配料,经煅烧苛化等工序回收烧碱和热能的新工艺,对其技术原理及联产工艺进行了探讨和论述。从小试结果看出,该联产工艺技术基本可行,环境与经济效益显著,不仅为制浆造纸黑液的治理提供了一条新途径,而且降低了造纸与氧化铝两者的生产成本,构建了一种化学制浆与氧化铝联产的具有区域化循环经济特点的清洁生产工艺方案。

The combination of alkali chemical pulping and aluminum oxide was introduced in this paper. In the process of alkli recovery system, the burning stage was cancelled, the black liquor with proper concentration was directly pumped into a aluminum dioxide plant as a material for smelting of aluminum to recover alkali and heat through calcining and causticization process. The technological principle and the process of combining production were explored and elaborated in experiment. The results showed that the technique of combining production was feasible and the environmental and economic benefits were remarkable. The new technique not only provides an alternate way for the blach liquor treatment, but also reduces the production cost of both paper and aluminum oxide. A clean technical project was constructed with regional recycling economic characteristics of combining chemical pulping with aluminum oxide.