湿法炼锌泥的微波干燥实验  

Experimental study on the microwave drying of hydrometallurgy mud

作　　者：林国[1,2,3,4] 胡途[1,2,3,4] 彭金辉[1,2,3,4] 尹少华[1,2,3,4] 张利波[1,2,3,4] 李志强[1,2,3,4] 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]云南省特种冶金重点实验室,云南昆明650093 [3]微波能工程应用及装备技术国家地方联合工程实验室,云南昆明650093 [4]非常规冶金教育部重点实验室,云南昆明650093

出　　处：《化工进展》2015年第9期3472-3475,共4页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(U1302271);云南省中青年学术技术带头人后备人才资助项目(2012HB008)

摘　　要：目前回转窑干燥物料的方法主要存在干燥时间长、环境污染严重、效率低等缺点,为了解决这一问题,开展了微波干燥湿法炼锌泥的实验研究,采用实验室自制的微波干燥设备,考察微波功率、干燥时间以及物料质量对样品脱水率的影响。研究结果表明:在一定条件下,脱水率随干燥时间延长而增加,随着微波功率的增加而提高,随物料质量增加而降低。实验在微波功率600W、物料质量40g、微波加热时间3min时,湿法炼锌泥的脱水率达到99.57%;FT-IR分析可知,干燥后波数1625cm-1和3300cm-1附近水分子的伸缩振动峰基本消失,说明微波干燥后物料基本不含水分;与常规干燥进行比较,微波干燥湿法炼锌泥具有干燥时间短、脱水效率高、清洁无污染的优点,是一种高效节能的新型干燥方法。Conventional drying process uses rotary kiln to dry hydrometallurgy mud. This process has disadvantages like longer heating time,environmental pollution,and low efficiency. This research developed a technology of microwave drying hydrometallurgy mud in order to improve the drying efficiency. Effects of microwave power,drying time and materials weight on the dehydration rate of hydrometallurgy mud were investigated using a laboratory-made microwave reactor furnace. The results showed that dehydration rate decreased with the increase of the material weight,and improved with the increase of the microwave power and drying time. The experimental conditions were as the following,600W microwave power,40g mass of sample,and 3min heating time. Under the conditions, the dehydration rate was 99.57%. FT-IR analysis demonstrated that the stretching vibration peak of water molecules at 1625cm-1 and 3300cm-1 disappeared,indicating that the hydrometallurgy mud was completely dried after the microwave drying treatment. A comparative study was also performed on microwave drying and conventional electrical drying process. The experimental results showed that the microwave heating had some advantages with respect to shorter drying time,higher dehydration efficiency and less pollutions.

关 键 词：湿法炼锌泥 微波 辐射 干燥 脱水 

分 类 号：TF813[冶金工程—有色金属冶金]