A kind of forsterite fiber and preparation method thereof

Abstract

The invention discloses forsterite fiber and a preparation method of the forsterite fiber. The technical scheme is characterized in that the preparation method comprises the steps of taking 28.0 to 43.0 weight percent of dehydroxylation serpentine, 52.0 to 67.0 weight percent of waste forsterite, 0.5 to 4.5 weight percent of aluminum oxide and 0.3 to 1.8 weight percent of chromium oxide as raw materials, and uniformly mixing the raw materials to obtain a mixture; then putting the mixture in a resistance furnace or an electric arc furnace, rising the temperature to be 1600 to 1800 DEG C, and directly carrying out thread throwing after fusion to obtain the forsterite fiber, wherein the dehydroxylation serpentine contains the main chemical components of MgO of which the content is greater than or equal to 44.0 weight percent, SiO2 of which the content is greater than or equal to 47.0 weight percent and CaO of which the content is greater than or equal to 6.0 weight percent; the grain size of the waste forsterite is less than 0.1mm; the waste forsterite contains the main chemical components of MgO of which the content is greater than or equal to 50.0 weight percent, SiO2 of which the content is greater than or equal to 42.0 weight percent, CaO of which the content is greater than or equal to 5.0 weight percent and IL (Interleukin) of which the content is less than or equal to 2.0 weight percent. The forsterite fiber disclosed by the invention has the characteristics of resource recovery, environment friendliness, simple technology and low production cost; a prepared product is smaller in line contraction rate, larger in tensile strength and higher in using temperature.

Description

Technical field [0001] The invention belongs to the field of fiber technology. Specifically, it relates to a forsterite fiber and a preparation method thereof. Background technique [0002] Serpentine (Mg 6 [Si 4 O 10 ][OH] 8 ) Belongs to the silicate minerals. Its crystal structure unit layer is composed of a layer of silicon-oxygen tetrahedron and magnesium hydroxide octahedron. Due to the asymmetry of the unit layer, the structural layer is bent to form an octahedron outside and a tetrahedron inside. The tubular structure has excellent fire resistance, alkali resistance and abrasion resistance, and has low thermal conductivity. It is an ideal raw material for manufacturing heat insulation materials. However, serpentine may pose a fatal threat to the human body, and there are disputes on the safety of its use, restricting its application. Therefore, many scientific researchers in my country have conducted in-depth research on serpentine, aiming to reduce or eliminate its toxi...

AI Technical Summary

Problems solved by technology

The main problems currently faced by the ceramic industry are: poor biosolubility of ceramic fibers and low long-term use temperature

[0004] At present, there are technologies for preparing forsterite refractory fibers, such as the "800-degree forsterite refractory fiber" (CN103058637A) patent technology, which discloses a technology for preparing glass fibers with forsterite and quartz sand as the main raw materials. The main phase composition of the obtained fiber products is calcium silicate, and the content of forsterite is relatively low; there are literatures (Li Shiqing et al. Study on Calcination Modification of Serpentine Asbestos. Comprehensive Utilization of Mineral Resources. 2008, 6 (3), 25- 27) reported that forsterite fiber was prepared by calcining and modifying serpentine asbestos. The content of forsterite phase in the fiber products produced by this technology is not high, which affects its performance. Another document (Xu Jianfeng et al. Using olivine Preparation of lightweight refractory materials from waste powder ore. Non-metallic minerals, 2014, 34(2), 65-67) introduced the use of olivine waste powder ore to prepare lightweight refractory materials. The refractory products produced by this technology have low strength