钙硅渣湿法处理工艺  

Hydro-treatment Technology of Hydrategarnet

作　　者：张亚莉[1] 于先进[1] 张邦胜[2] 张丽鹏[1] 李德刚[1] 李小斌[3] 

机构地区：[1]山东理工大学化学工程学院,山东淄博255081 [2]北京矿冶研究总院,北京100070 [3]中南大学冶金科学与工程学院,长沙410083

出　　处：《有色金属（冶炼部分）》2011年第6期6-9,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：山东省自然科学基金资助项目(ZR2010EL006);淄博市科技项目(2006kjm39)

摘　　要：研究钙硅渣湿法处理最佳工艺条件,确定CO2浓度、CO2气体的添加方式、分解次数、时间、温度、液固比、碱液和铝酸钠浓度等因素对钙硅渣湿法分解的影响。有利于硅渣湿法分解的条件是延长反应时间,增加分解次数,采用合适的添加方式,确定适宜的温度范围。CO2浓度、液固比对钙硅渣湿法分解的影响不明显。在钙硅渣湿法分解过程中,含硅化合物转化成在碱液中相对稳定的水合硅酸钙,而含铝化合物转化成在碱液中反应活性较好的氢氧化铝等。适宜的转型工艺条件是CO2浓度8%~100%,分解时间2h左右,L/S 5~10,温度50℃左右,分解次数为三次。The optimal condition of hydrategarnet hydro-treatment is investigated and the influencing factors are described,such as CO2 concentration,measures of CO2 addition,times of decomposition,retention time,temperature,ratio of liquid/solid and alkali liquor to aluminate etc.Prolonging of reaction time,increasing hydro-treatment times,adequate measures of CO2 addition and the optimal temperature range are favorable to the transformation of the hydrategarnet.Variation of CO2 concentration and L/S ratio are of little influence on the hydro-treatment.It is indicated that in the process of decomposition of hydrategarnet,the compound containing silica is transformed into calcium hydrate silicate which exists in stability in caustic solution,and compound containing alumina into aluminum hydroxide which appears in a good reactivity in caustic solution.The optimal parameters for the transformation include 8%~10% CO2 concentration,2h reaction time,5~10 L/S ratio,50℃ temperature and three times treatment.

关 键 词：冶金技术 水化石榴石 湿法处理 铝硅分离 

分 类 号：TF802[冶金工程—有色金属冶金] TF821