摘要
为了利用造孔剂制备轻质镁橄榄石-尖晶石耐火材料,以镍渣为主要原料,稻壳等为造孔剂,混合磨细后在1 350℃、1 400℃、1450℃和1500℃下煅烧制备成轻质镁橄榄石-尖晶石耐火材料,探讨造孔剂对其性能(气孔率、抗弯强度、体积密度、耐火度)的影响。结果表明,1350~1500℃可制备轻质镁橄榄石-尖晶石耐火材料,随着造孔剂含量的增加,耐火材料的气孔率增加,体积密度和抗弯强度减小。其中,以稻壳和碳粉为复合造孔剂,1 450℃烧成耐火材料的气孔率为35.43%,体积密度为1.29 g/cm^3,抗弯强度为15.95 MPa,耐火度为1 480℃。由XRD分析可知,试样中含镁橄榄石和尖晶石;由SEM分析可知,镁橄榄石晶体呈三角棱状,尖晶石晶体呈短柱状。
In order to prepare light forsterite-spinel refractories utilizing pore formers, using nickel slag as principal raw material and rice hull as pore former, after mixing and grinding, were calcined at 1 350 ℃, 1 400 ℃, 1 450 ℃ and 1 500 ℃ to prepare light forsterite-spinel refractories. The effects of pore-forming agents on its properties(porosity,flexure strength,volume concentration)was investigated.The results showed that the lightweight forsterite-spinel refractories were manufactured at 1 350-1 500 ℃. The porosity of the refractory material increases because of the increase of the pore-forming agents, the flexure strength and the volume concentration decrease accordingly. With rice hull and carbon powder as the composite pore-forming agents, the porosity of refractories sintered at 1 450 ℃ was 35.43%, the volume concentration was 1.29 g/cm^3 , the flexure strength was 15.95 MPa and the refractoriness was 1 480 ℃. XRD showed that the refractories consisted of forsterite and spinel phases. SEM analysis showed that forsterite were triangular prism and spinel were columnar.
作者
李琦
钱烽烽
付启新
王枭
郭伟
Li Qi;Qian Fengfeng;Fu Qixin;Wang Xiao;Guo Wei(School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051)
出处
《非金属矿》
CAS
CSCD
北大核心
2019年第4期41-43,共3页
Non-Metallic Mines
基金
国家自然科学基金(51872252)
江苏高校品牌专业建设工程资助项目(PPZY2015A025)
