Basalt fiber and preparation method thereof

Abstract

The invention relates to basalt fiber and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: uniformly mixing the following raw materials: 52.0 to 67.0 percent by weight of basalt, 28.0 to 43.0 percent by weight of waste talc, 1.5 to 4.5 percent by weight of genthite and 0.3 to 3.3 percent by weight of aluminum oxide to obtain a mixed material; and placing the mixed material into a resistance furnace or an electric-arc furnace, heating into a molten state and performing thread throwing to obtain the basalt fiber. The basalt comprises the following chemical components: more than or equal to 45.5 percent by weight of SiO2, more than or equal to 13.7 percent by weight of Al2O3, more than or equal to 10.9 percent by weight ofMgO, more than or equal to 9.6 percent by weight of CaO, less than or equal to 11.2 percent by weight of Fe2O3 and FeO and less than or equal to 3.5 percent by weight of Na2O and K2O); and the waste talc comprises the following chemical components: more than equal to 57.9 percent by weight of SiO2, more than or equal to 28.5 percent by weight of MgO, less than or equal to 2.3 percent by weight ofNa2O and K2O) and less than or equal to 4.7 percent by weight of IL. The basalt fiber and the preparation method thereof have the characteristics of resource recoverability, environmental friendliness, simple process and low production cost; and the prepared basalt fiber has small thread shrinkage rate, low heat conductivity and high use temperature.

Description

technical field [0001] The invention belongs to the field of fiber technology. It specifically relates to a basalt fiber and a preparation method thereof. Background technique [0002] Basalt is a rock with dense or foamy structure formed after the cooling of magma erupted from a volcano. Its main minerals are calcium-rich clinopyroxene and basic plagioclase; the secondary minerals are olivine and orthopyroxene . The crystallization degree and grain size of basalt mainly depend on the cooling rate of magma. Slow cooling (such as cooling a few degrees per day) can produce crystals of several millimeters in size and equal size; rapid cooling (such as cooling 100°C per minute) can produce fine needle-shaped, plate-shaped crystals or amorphous glass. Therefore, under surface conditions, basalt is usually fine-grained to aphanitic or glassy, ​​and a few are medium-grained. It often contains olivine, pyroxene and plagioclase phenocrysts, forming a porphyritic structure. Pheno...

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 existing technologies for preparing basalt fibers, such as the patented technology of "a basalt fiber with high temperature resistance" (CN108101376A), which discloses a technology for preparing modified ceramic fibers with basalt as the main raw material. The technology is complicated. The use of organic modifiers is expensive and releases CO during use 2 , SO 2 and SO 3 Gas pollutes the environment; "a high fracture strength basalt fiber" (CN108793759A) patent technology discloses a technology for preparing basalt fiber with basalt as the main raw material. High energy consumption; it is reported in literature (Qi Fengjie et al. A review of continuous basalt fiber research. 2006, 31(2), 42-46) that the basalt particles are ultra-finely ground, remelted and drawn through the crucible nozzle to obtain Basalt fiber, the energy consumption of this technology is extremely high, and the diameter of the obtained fiber product is relatively thick and the refractoriness is low, which affects its performance