我国是个硫磺用量大国，硫磺生产小国。硫磺是一种重要的化工产品和基本工业原料，为了节约资源以及提高资源的利用率，重新回收各种湿法冶金渣中的单质硫是有必要的。硫的回收方法有很多，主要为物理法和化学法。物理法回收硫对设备和物料有较高要求，具有一定的局限性；而化学法能处理各种物料，在一定程度上弥补了物理法的不足。化学法除了常用的硫化铵法、二甲苯法、煤油法、四氯乙烯法外，还有硫化钠-二氧化硫法和新型脱硫剂法，比如四氢萘、苯乙烯、十氢萘和甲苯等；对于不溶性硫磺回收方法的研究也取得一定新的进展。文中介绍了各种化学法回收硫的原理及其优缺点。%The sulfur consumption in China is rather high in spite of a small sulfur output. It is highly imperative to recycle sulfur out of hydrometallurgical slag to improve resources’ utilization rate. Physical methods of recycling sulfur have some disadvantages for their high requirements of equipments and raw materials. However, chemical methods can process different raw materials which compensate for the limitations of physical methods to a certain extent. In addition to the common chemical methods, including ammonium sulfide, xylene, kerosene, PCE, there are sodium sulfide-sulfur dioxid, new desulfurizer, like tetrahydronaphthalene, styrene, decahydronaphthalene and toluene. Insoluble sulfur recovery methods also have some research progress. The advantages and disadvantages of the chemical methods are introduced based on discussing their principles.
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