用硅石尾矿粉和石屑制备蒸压灰砂砖.pdf

第36卷第3期
非金属矿
Vol 3
2013年5月
Non-metallic Mines
May
2013
ーーニーーに…?,:-ニニニ
ー?ーー“,,-,ーー…ーー?ーーー
用硅石尾矿粉和石屑制备蒸压灰砂砖
刘辉敏
(洛阳理工学院材料科学与工程系,河南洛阳471023)
摘要研究了配合料组成、成型压力和蒸压温度对硅石尾矿粉(硅尾粉)一石脣蒸压灰砂砖抗压强度的影响,并用X射线衍射(XRD)和担
描电镜(SEM)对部分试样进行了分析。结果表明,以硅尾粉、石屑和石灰为主要组分,在适当条件下可制备强度较高的蒸压灰砂砖。当石灰粉与
硅尾粉质量比小于045时,随着石灰粉掺量的増加,试样抗压强度逐渐提高;当质量比进一步增加时,试样强度降低。提高硅尾粉和石灰混合物含
量、成型压力和蒸压温度,可提高灰砂砖强度。石屑基本上不参与水热反应
关键词难石尾矿粉石屑灰砂砖蒸压
中图分类号:TU5221'9文献标识码:A文章编号:100098098(2013)03-00603
Autoclaved Sand-lime Bricks from Silica Tailings Powder and Stone Chips
Liu it
(Department of Material Science and Engineering, Luoyang Institute of Science and Technology, Luoyang, Henan 471023)
Abstract The influences of ingredients, molding pressures and autoclave temperatures on properties of autoclaved sand-lime bricks from silica
tailings powder and stone chips were studied, and some samples were analyzed by XRD and SEM. The results show that high strength autoclaved
sand-lime bricks can be prepared under appropriate conditions y silica tailings powder, stone chips and lime as the main components. When the mass
ratio of lime powder o the silica tailings power is less than 0. 45, with the lime powder content increasin te compressive strength of the samples
gradually increases; but when the ratio further increases, the strength of the samples reduces. To improve the content of suica tailings powder and lime,
molding pressure and the autoclave temperature can increase the strength of the sand-lime bricks. The stone chips are basically not involved in the
hydrothermal reaction
Key words silica tailings powder stone chip sand-lime brick autoclave
蒸压砖生产过程中不消耗黏土资源,是一种环保
表2硅尾粉的粒径分布%
型建筑材料,采用工业废弃物生产蒸压砖对于减少>30um30-150wm15010m1007um7443ums43um
天然矿物原料消耗具有重要意义2?。硅石尾矿粉硅
3.8
15.5
373
24.1
11.7
尾粉)是玻璃原料加工过程中产生的固体废料,呈土
表3石屑的粒径分布/%6
黄色细粉状。石屑是石料厂加工石灰石骨料过程
>4.75mmn
4.75~2.36mm2.36~1.18mm1.18-0.6mm
中产生的粒度在5mm以下的固体废料。本实验对
3.5
31,5
15.6
以硅尾粉和石屑为原料制备蒸压灰砂砖进行了研究
0.60.3mm
0.3-0.15tmn0.15-0.075mm<0.075mm
1实验部分
11.2
9.4
7.2
3.8
1.1原料实验用硅尾粉和石屑的化学成分见表1.2实验方法将硅尾粉、石屑和石灰粉按一定
1,其粒径分布分别见表2和表3。硅尾粉主要矿物比例配合,用搅拌机干混3min,加入适量水再搅拌
组成为石英,石屑主要矿物组成为碳酸钙。实验用3min,然后放置5h使石灰消解。调整混合料水分并
石灰粉有效CaO含量为68.2%(质量分数),80um搅拌至适合压制成型(手握能成团,放手后不松散,不
方孔筛筛余为7,2%,消化时间为4min,消化温度为湿手)。取适量混合料,压制成直径3.6cm、高约3.6cm
86℃。
的试样。将试样在蒸压笠中按设定制度(蒸压温度和
表1硅尾粉和石屑的化学成分%
时间)进行蒸压处理。遡定菾压后试样抗压强度,并
原料娆失璗SiO2Al2O3Fe2O3
o Mgo R20
对部分试样取样,用X射线行射(XRD)和扫描电镜
硅尾粉0.6696.440.811.020.420.120.16
(SEM)进行物像分析和显微结构分析。
石盾42,63520880614891340-402结果与讨论
2.1石灰粉与硅尾粉质量比对强度的影响试样强
收稿日期:2013-03-22
度主要依靠石灰中活性CaO与硅尾粉中SiO2在水