为了在综合利用固体废弃物的同时减少煅烧石灰所带来的CO2排放,采用铜尾矿-矿渣-水泥熟料-风积砂原料体系制备压加气混凝土,以富钙、镁的铜尾矿和矿渣代替传统加气混凝土所需的石灰.具体研究了各原料组份对加气混凝土物理力学性能的影响,得到B06级铜尾矿加气混凝土的优化配合比为：铜尾矿、矿渣、风积砂、水泥熟料、石膏的质量分数分别为30%、35%、20%、10%、5%.所制备的B06级蒸压加气混凝土的绝干密度为610.2 kg.m-3,抗压强度为4.0 MPa,达到了《蒸压加气混凝土砌块》（GB 11968—2006）规定的A3.5、B06级加气混凝土合格品的要求.物相分析显示,所制备的加气混凝土中主要结晶相是板状的托贝莫来石、硬石膏、残留的石英以及来自原始铜尾矿中的残留矿物.
Copper tailings,blast furnace slag,eolian sand,a small amount of clinker and gypsum were used as raw materials to prepare autoclaved aerated concrete（AAC）.Lime was substituted by Ca and Mg rich copper tailings and blast furnace slag to reduce the CO2 emission brought by limestone calcinations.This study focused on the effect of different component of raw materials on the physical and mechanical properties of AAC.The optimal proportion of major raw materials for a B06 grade AAC is as follows：copper tailings 30%,blast furnace slag 35%,eolian sand 20%,clinker 10% and gypsum 5%.The prepared AAC sample has bulk density of 610.2 kg·m-3 and compressive strength of 4.0 MPa,which can reach the requirements of A3.5,B06 level of AAC product regulated by ＂autoclaved aerated concrete block＂ GB 11968—2006.Microstructure analyses show that the main crystalline phases in the AAC sample are tobermorite,anhydrite,residual quartz and residual minerals from copper tailings.
参考文献
| [1] | 余良晖,贾文龙,薛亚洲.我国铜尾矿资源调查分析[J].金属矿山,2009(08):179-181. |
| [2] | 陈宇峰,陆晓燕.铜尾矿资源化的现状和展望[J].南通工学院学报（自然科学版）,2004(04):60-62. |
| [3] | 张德兴,于传兵.选铜尾矿综合回收硫资源研究及实践[J].矿冶,2009(03):24-26. |
| [4] | 刘维平.利用铜尾矿制备彩色石英砂的研究[J].有色金属(选矿部分),2004(01):44-46. |
| [5] | 周连碧,代宏文,吴亚君.铜矿尾矿库无土植被与有土覆盖农作物种植研究[J].有色金属,2003(z1):58-62. |
| [6] | 赵风清,倪文,王会君.利用铜尾矿制蒸养标准砖[J].矿业快报,2006(04):34-36. |
| [7] | 方永浩,庞二波,王锐,宣文,陈宇峰.用低硅铜尾矿制备蒸压灰砂砖[J].硅酸盐学报,2010(04):559-563. |
| [8] | 陶红森 .武汉市洪山乡葛化电厂高钙粉煤灰研制加气混凝土砌块的研究[D].武汉理工大学,2004. |
| [9] | 王舫 .低硅尾矿加气混凝土蒸养条件下反应机理的研究[D].武汉理工大学,2003. |
| [10] | 卢都友,吕忆农,梅来宝,许仲梓,邓敏,唐明述.两类典型碱活性岩石在碱溶液中压蒸的反应产物[J].建筑材料学报,2006(01):10-18. |
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