Gas-electric kiln for producing basalt continuous fiber

Abstract

The invention provides a gas-electric kiln for producing basalt continuous fiber. A cavity in a kiln body comprises a melting region, a clarification homogenizing region and a work region; two long high side walls of the melting region, two long high side walls of the clarification homogenizing region and two long high side walls of the work region are each provided with at least one electrode; all electrodes on the two long high side walls of the kiln body are distributed in a staggered mode in the length direction of the kiln body; combustors are arranged on the two long high side walls of the melting region, the two long high side walls of the clarification homogenizing region and the two long high side walls of the work region; the electrified electrodes are immersed in basalt molten liquid, and a heating mode belongs to internal heating; the combustors conduct heating above the basalt molten liquid, and a heating mode belongs to external radiation heating; the two heating modes are combined to form internal and external integrated heating, so that a thermal field in the kiln is more uniform, the melting rate of basalt stone is increased, the temperature and components of the basalt molten liquid are more uniform, the yield and quality of the basalt continuous fiber produced by the single kiln are improved, and the kiln is more beneficial to achieving large-scale industrialproduction of the basalt continuous fiber.

Description

technical field [0001] The invention relates to the technical field of basalt continuous fiber production equipment, in particular to a gas-electric kiln for producing basalt continuous fiber. Background technique [0002] Continuous basalt fiber (CBF for short) is an emerging environment-friendly inorganic fiber material, which has excellent properties such as light weight, high strength, high temperature resistance, acid and alkali corrosion resistance, heat insulation and sound insulation, etc. Wide application, broad market prospect. [0003] Today, the production process of continuous basalt fiber is roughly as follows: natural basalt rock is used as a raw material for the production of continuous basalt fiber, and is put into the kiln by a feeder, and is melted into a melt by the high temperature environment in the kiln. After further clarification and homogenization, Convection flows to several work areas, and one or more platinum-rhodium alloy porous drain plates ar...

AI Technical Summary

Problems solved by technology

[0005] Since the combustion heating is heated on the surface of the molten pool, and the basalt rock contains a large amount of iron oxide, the heat permeability is extremely poor, resulting in a very shallow effective melting depth in the kiln, which restricts the thermal efficiency of combustion heating and the melting efficiency of the furnace

Although electric heating is internal heating of raw materials, pure electric heating belongs to cold top furnace or semi-cool top furnace, which has low surface temperature of molten pool, high viscosity, and even serious skinning phenomenon, which is not conducive to the discharge of bubbles in the melt, so it has to be extended The long residence time of the melt in the furnace restricts the thermal efficiency of electric heating, making it impossible to realize the large-scale industrial production of continuous basalt fiber, and unable to meet the demand for continuous basalt fiber in various fields of society.

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