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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2020, Vol. 39 ›› Issue (12): 3858-3865.

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Analysis of Basalt Fiber Raw Material Characteristics

LIU Changjiang1,2, TONG Xiaocong1, LIU Zhong1, YANG Chuncheng1,2, LI Hongchao1,2, JIANG Letao1,2   

  1. 1. Institute of Basalt Fiber Materials, School of Gemology and Materials Science, Hebei GEO University, Shijiazhuang 050031, China;
    2. Hebei GEO University Baogu Incubator Co., Ltd., Shijiazhuang 050031, China
  • Published:2021-02-01

Abstract: Basalt fiber is a kind of continuous fiber material prepared by melting and followed fast drawing process from raw basalt ore, whose properties depend strongly on its raw materials, and not all of basalt is suitable for fiber production.The present work aims to provide useful information for the optimization and standardization of the raw materials for basalt fiber production. Based on the chemical composition of 14 fibers and 20 rocks, the characteristics of chemical components, mineralogy, lithology, melt properties and structure were analyzed comprehensively in this work. A series of limited conditions, including classes and molar fraction of the oxide components, acidity coefficient, mineral composition, types of alkaline rocks, saturation of alumina, relations between depolymerization degrees and viscosity of the melts were generalized. The result shows that the amorphous or cryptocrystalline, calc-alkaline, and metaluminous rock composed of plagioclase and clinopyroxene without quartz, olivine, corundum is suitable for fiber production. Moreover, oxides molar fraction and acidity coefficient of the raw rock are RO2=0.58 to 0.75, R2O3=0.15 to 0.20, RO=0.18 to 0.30 (R stands for cations), and 3.5 to 5.8, respectively. For the silicate melts, NBO/T is 0.2 to 0.4, and lgη is 0.5 Pa·s to 1.4 Pa·s, respectively.

Key words: basalt fiber, raw material characteristic, silicate melt

CLC Number: