耐火材料 ›› 2022, Vol. 56 ›› Issue (4): 299-303.DOI: 10.3969/j.issn.1001-1935.2022.04.005

• 研究开发 • 上一篇    下一篇

硅石原料特性及相变行为研究

毛胜孝1), 贾正刚2), 李兵2), 员文杰1,3)   

  1. 1)武汉科技大学 省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
    2)湖北安耐捷炉衬材料有限公司 湖北襄阳 441100
    3)武汉科技大学 高温材料与炉衬技术国家地方联合工程研究中心 湖北武汉 430081
  • 收稿日期:2021-09-18 出版日期:2022-08-15 发布日期:2022-11-09
  • 作者简介:毛胜孝:男,1995年生,硕士研究生。E-mail:1150428932@qq.com

Characteristics and phase transformation behavior of quartzites

Mao Shengxiao, Jia Zhenggang, Li Bing, Yuan Wenjie   

  1. The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2021-09-18 Online:2022-08-15 Published:2022-11-09

摘要: 将3种不同产地的硅石原料破碎、研磨、成型后制备了硅石试样,经烘干后,再分别在1 350、1 450和1 550 ℃保温2 h,对硅石粉体的红外光谱、粒度分布和显微结构,以及烧后试样的物相组成、真密度和线变化进行了研究。结果表明:1)不同产地的硅石晶粒大小分布不均,既有十几微米的细小晶粒,也存在上百微米的粗大晶粒;2)在相同的破碎和磨粉工艺下,平均晶粒小的硅石研磨后粒度较小,呈双峰分布,平均晶粒大的硅石粒度较大,呈多峰分布;3)硅石的相变速度受杂质含量和晶粒度的共同影响。结晶硅石的相变转化速度相对较快。

关键词: 硅石, 粒度, 相变, 红外光谱, 真密度

Abstract: Three kinds of quartzites from different regions were crushed,ground,shaped,dried and fired at different temperatures (1 350,1 450 and 1 550 ℃) for 2 h.The quartzites powders were investigated in terms of the infrared spectrum,the particle size distribution,and the microstructure.The fired specimens were tested in terms of the phase composition,the true density and the linear change rate.The results show that:(1)the grain size distribution of quartzite from different regions is different;there both exist fine grains of more than ten microns and coarse grains of hundreds of microns;(2)under the same crushing and grinding conditions,the quartzite with smaller average size has small particle size and presents a bimodal distribution,while the quartzite with larger average size has large particle size and presents a multi-modal distribution;(3)the phase transformation rate of the quartzites is affected by both the impurity content and the crystal grain size;and the transformation rate of crystalline quartzite is relatively fast.

Key words: quartzite, grain size, phase transformation, infrared spectrum, true density

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