半焦沫煅烧制取硫化钠工艺的研究

Study on Preparation of Sodium Sulphide by Semi-Coke Powder

某厂原采用芒硝和煤炭煅烧制取硫化钠,单炉日产量较低,生产成本较高,现拟采用半焦沫代替煤炭煅烧制取硫化钠。在分析用半焦沫代替煤炭的可行性后,用半焦沫和芒硝进行了煅烧试验。首先分析了每台转炉的最佳芒硝投加量,然后用4台转炉进行了平行试验,与该厂之前用煤炭煅烧时的粗制产品黑灰中硫化钠的含量进行对比,以确定半焦沫煅烧试验的效果。结果表明,用半焦沫代替煤炭制取硫化钠工艺不仅可节省原料的投入量,降低原料成本,平均每吨水折碱约可节约成本60.91元,还可使单炉的平均产量提高2.579t/d。

A plant originally used mirabilite and coal to calcine sodium sulfide, but the single furnace at cer- tain low yield level, adding hugely to production costs. Now the factory to be used semi-coke powder in- stead of coal to calcine sodium sulfide. After analysis the feasibility of semi-coke powder instead of coal in the process, the calcination experiments with semi-coke powder and mirabilite. This paper first analyzes the optimal dosage of mirabilite in each converter, and then use four converters to do parallel test, com- pared the content of sodium sulfide in crude black ash with the before calcination products, then compared the two results to the best material. The results showed that this alternative process can save raw material inputs and reduce the cost of raw materials, the average per ton of water reduction alkali can save the cost of 60. 91 yuan. In addition, it can also make the average yield of single furnace was increased by 2. 579 t/ d.