假白榴正长岩烧结反应过程的热力学分析与评价  

Sintering reaction of pseudoleucite syenite:Thermodynamic analysis and process evaluation

作　　者：谭丹君[1] 马鸿文[1] 李歌[1] 刘浩[1] 邹丹[1] 

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083

出　　处：《地学前缘》2009年第4期269-276,共8页Earth Science Frontiers

基　　金："十一五"国家科技支撑计划项目(2006BAD10B04)

摘　　要：在综合分析假白榴正长岩物相组成的基础上,以碳酸钠为助剂,分解假白榴正长岩中主要矿物相,对其进行热力学分析,并与石灰石烧结法进行比较。烧结反应实验结果表明,采用碳酸钠为助剂,假白榴正长岩粉体在760～880℃条件下反应1.0～1.5h,矿石中主要矿物的分解率可达97.1%。热力学计算结果表明,纯碱烧结法处理1t假白榴正长岩矿石,消耗Na2CO30.65t,且约95%的Na2CO3可以回收循环利用,消耗标准煤190.97～206.82kg,排放CO20.77～0.81t,一次性资源消耗量、标准煤耗、温室气体CO2排放量分别比石灰石烧结法分别减少了65%、63%、65%。纯碱烧结法具有一次性资源消耗低、能耗低和温室气体CO2排放量少等优点,工业化应用前景十分广阔。Based on comprehensive analysis of the modal composition of a pseudoleucite syenite ore collected from the Zijin Hill of Lin County, Shanxi Province, we carried out a thermodynamic analysis of pseudoleucite syenite sintering process with sodium carbonate as the additive. It indicates that when the pseudoleucite syenite was sintered at 760-880℃ for 1.0-1.5 h, with the sodium carbonate as the additive, the decomposition rate of minerals in the pseudoleucite syenite could reach 97.1%. The thermodynamic calculation shows that it needs to consume 0. 65 t of Na2CO3 in treating pseudoleucite syenite ore per ton, and about 95% Na2CO3 could be recycled. This process consumed （2. 29-2. 48） ）〈 10^-6 kJ of heat energy, corresponding to 190. 97-206. 82 kg of standard coal and the thermal efficiency was 40% ; the CO2 emission is 0.77-0.81 t. Compared with the Russian limestone-sintering technique, the consumption of natural mineral resources and energy, and greenhouse gas emissions in soda-sintering technique could be reduced by 65%, 63% and 65%, respectively. Therefore, the procedure suggested in this paper has broad prospects in industrial applications for its economic benefits and environmental-friendliness.

关 键 词：非水溶性钾矿 烧结反应 热力学 纯碱烧结法 石灰石烧结法 

分 类 号：TQ170.1[化学工程—硅酸盐工业]