A kind of basalt fiber and preparation method thereof

Abstract

The invention relates to a basalt fiber and a preparation method thereof. The technical scheme is: firstly, 52.0-67.0wt% of basalt, 28.0-43.0wt% of waste talc, 1.5-4.5wt% of dark nickel serpentine and 0.3-3.3wt% of alumina are used as raw materials, and mixed evenly, that is To obtain the mixture; then put the mixture in a resistance furnace or an electric arc furnace, heat up to a molten state, and spin the filaments to obtain basalt fibers. The chemical composition of basalt is: SiO 2 Content ≥ 45.5wt%, Al 2 o 3 Content ≥ 13.7wt%, MgO content ≥ 10.9wt%, CaO content ≥ 9.6wt%, (Fe 2 o 3 +FeO)≤11.2wt%, (Na 2 O+K 2 O)≤3.5wt%; The chemical composition of waste talc is: SiO 2 Content ≥ 57.9wt%, MgO content ≥ 28.5wt%, (Na 2 O+K 2 O)≤2.3wt%, IL≤4.7wt%. The invention has the characteristics of resource recovery, environmental friendliness, simple process and low production cost; the prepared basalt fiber has small shrinkage rate, low thermal conductivity and high service 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