摘要
在原铝生产、铝材制备以及再生铝的回收利用过程中,均会产生大量的废渣。迄今为止,我国对铝工业废渣的处置方式仍以堆积填埋为主。为解决铝工业废渣的堆积填埋而导致的环境污染和资源浪费,开展了铝渣制备免烧砖的可行性研究。系统研究了不同掺量的石灰、石膏及水泥对铝渣免烧砖力学性能的影响规律,对铝渣免烧砖的微观形貌和矿物组成进行SEM和XRD分析。试验结果表明,在65%铝渣、10%石灰、15%石膏和10%水泥配合比条件下制得的免烧砖,7 d抗压强度为17.31 MPa,7 d抗折强度为2.61 MPa,符合MU15级免烧砖的性能要求;免烧砖内部发生了明显的水化反应,反应生成的CAH、CSH和Aft是铝渣免烧砖力学性能的主要来源。
In the process of raw aluminum production,aluminum preparation and recycling of recycled aluminum,alarge number of waste slag would be produced,which is called aluminum industrial slag.Up to now,the disposal method ofaluminum industry slag in China is mainly stacking and landfilling.In order to alleviate the environmental problems causedby the accumulation of landfill slag from the aluminum industry and determine the feasibility of preparing aluminum slag toprepare non-fired brick,the effects of different addition amounts of lime,plaster and cement on the mechanical properties ofaluminium slag non-fired brick were systematically studied.The micro-morphology and mineral composition of aluminiumslag non-fired brick were analyzed by SEM and XRD.The results showed that the compressive strength of non-fired brickmade from 65%aluminium slag,10%lime,15%plaster and 10%cement was up to 17.31 MPa in 7 days,and the flexuralstrength was up to 2.61 MPa in 7 days,which met the performance requirements of MU15 grade non-fired brick.Significanthydration reaction occurred inside the non-fired brick,CAH,CSH and Aft produced by hydration reaction were the mainsources of mechanical properties of aluminium slag non-fired brick.
作者
唐伟佳
倪红军
许茜
吕帅帅
汪兴兴
Tang Weijia;Ni Hongjun;Xu Qian;LüShuaishuai;Wang Xingxing(School of Mechanical Engineering,Nantong University,Nantong 226019,China)
出处
《金属矿山》
CAS
北大核心
2020年第7期211-215,共5页
Metal Mine
基金
江苏高校优势学科建设工程资助项目(编号:PAPD)
南通市应用研究计划项目(编号:JC2018115,JCZ18024)。
关键词
铝渣
免烧砖
力学性能
配合比
Aluminium slag
Non-fired brick
Mechanical property
Mix proportion
