电解锰渣对粉煤灰火山灰活性的硫酸盐激发.pdf

第34卷第4期
非金属矿
Vol34 No4
2011年7月
Non-metallic Mines
July, 2011
电解锰渣对粉煤灰火山灰活性的硫酸盐激发
王智"郭清春蒋小花2侯鸥坤钱觉时2
(1重庆大学化学化工学院,重庆40004;2重庆大学材料科学与工程学院,重庆400045)
摘要电解锰渣(EMR)是一种富含硫酸盐的惰性硅铝质材料,SO2含量高达15%~20%。粉煤灰-石灰一硫酸盐被作为粉煤灰活性激发
的基本系统,而电解锰渣中的硫酸盐能否作为粉煤灰等火山灰质材料的硫酸盐激发剂是值得研究的课题。研究了电解锰渣中硫酸盐对粉煤灰火山
灰活性激发的效果,结果显示:30%的电解锰渣对粉牒灰石灰体系有较好的硫酸盐激发作用,能够加快粉煤灰活性的激发速度和提高粉煤灰活性
的激发程度;电解锰渣中的硫酸盐转化为CaSO42H1O对粉牒灰-石灰体系的激发效果最好;电解锰渣中存在的易溶性碗酸盐使30%电解锰渣对
粉煤灰火山灰活性激发的效果比等当量SO3舍量的CaSO42H1O好,其作用效果接近于3%NaSO4对粉煤灰激发的效果。
关键词电解锰渣硫酸盐粉牒灰火山灰活性激发
中图分类号:TQ172.44文献标识码:A文章编号:1000809802011)14-000504
Sulphate Activating of Electrolytic Manganese Residue to Fly Ash
Wang Zhi " Guo Qingchun Jiang Xiaohua Hou Pengkun Qian Jueshi?
(1 College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044; 2 College of Material Science and Engineering,
Chongging University, Chongqing 400045
Abstract Electrolytic manganese residue(EMR )was an inert silicon aluminum material, which had a high O; content varying from 15%to
20%. Fly ash-lime-sulfae system was considered as a basic system to activate fly ash However, it was still worthy of research to investigate whether
the sul aes in electrolytic man anese residue could atia fly ash T fly ash aian fet of eletrolytic man anese residue was studied. Th
result showed that the ulfates in elecol ic man anese residue pla ed an acta in e n e s s em of fly ash-lime-sul ate and it could improve both
the speed and level of activating fly ash. The appropriate dosage of electrolytic manganese residue was 30%when pretreated with 7 ime in which
the sulfates had almost convered in o aso 2H Meanwhile the early an old messe engths of e system were higher Compared with
Cao H it could be found that 30%electrolytic manganese residue which had the same content of $O; as aso 2H2O was better to activate fl
ash, the activating effect on fly ash is close to that with 3%Na SO
Key words electrolytic manganese residue sulphate fly ash activation of pozzolanic reactivity
电解锰渣(EMR)是由锰矿通常为碳酸锰矿)采径是用于土木建筑材料。目前,电解锰渣在建筑材料
用电解方法生产金属锰过程中产生的废渣,每生产1t中的应用只是简单掺入到水泥混凝土中,未能充分发
电解金属锰所排放的酸浸废渣量约为6~7t。电解锰挥其富含硫酸盐的优勢。粉煤灰具有潜在的火山灰
渣的堆放消耗大量土地资源,增加企业处置费用2;活性,需要激发オ能得以发挥。粉煤灰-石灰-硫酸
同时渣场的渗滤液含有一定量的有害元素,任其排放盐被认为是粉煤灰类火山灰活性物质活性激发的基
将严重污染环境。因此,对电解锰渣加以有效利用,本系统?,其中硫酸盐主要通过有效激发粉煤灰中
不仅能彻底解决电解锰渣的污染问题,而且还能在
的活性SiO2和Al2O3,改善粉媟灰颗粒包裹层的结构
定程度上给电解锰生产企业带来一定的经济效益。
和增加粉煤灰活性成分的溶解度等途径来加怏粉媟煤
电解锰渣虽属于惰性硅酸盐材料,但与其它工灰活性的激发速度和提高粉煤灰活性激发的程度。
业废渣显著不同在于其中富含硫酸盐,SO3含量高达电解锰渣能否有效激发粉煤灰类火山灰质材料,及电
15%~20%,其硫酸盐除了大部分以石膏形态存在,解锰渣在其可溶性硫酸盐与石膏的协同作用下对粉
还有部分易溶性硫酸盐。从技术来看,电解锰渣煤灰-石灰体系的激发效果等,都是值得研究与探讨
的利用目前仍停留在研究上,有些成果虽然理论上可的课题。本试验通过研究电解锰渣中硫酸盐对粉煤
行,但经济指标和关键技术上还存在诸多问题;从利灰、石灰体系的激发效果,旨在为电解锰渣用于激发
用方式看,由于排放量巨大,锰渣最为可能的利用途粉煤灰类火山灰材料提供参考。
1试验部分
收稿日期:2011-05-0
基金项目:国家863项目(2008AA031206)资助。
1.1原材料电解锰渣,取自露天堆放的电解锰渣,
通讯联系人:E-mail: cquwangzhi@126,com
呈浆体状;粉煤灰,重庆珞璜电厂千排Ⅲ级灰,电解锰