This paper presents the results of theoretical and experimental studies to determine the optimal thickness of thermal insulation from basalt fiber and aerogel products for pipelines at temperatures of 300 and 600 °C. We carried out a comparison of the key thermophysical characteristics of the claimed heat-insulating materials. We performed a thermal imaging survey of the furnace chimney, insulated with basalt fiber and aerogel, while controlling the temperature of the flue gases by establishing the required ratio of the flow rate of natural gas and oxidizer. The temperature gradient along the thickness of the thermal insulation was obtained using a numerical tool developed in ANSYS. The results show that aerogel surpasses basalt fiber in all key thermophysical characteristics. At the same time, the only barrier to widespread industrial production and use of aerogel in the high-temperature thermal insulation segment is its market cost, which is still several times higher than that of basalt fiber in terms of an equivalent performance.
In the construction of modern bathrooms of flaming glass furnaces, glass resistant refractory materials of high quality and a variety of thermal insulation materials are used, which are compounded into multi-layer thermal insulation panels, reducing heat losses. However, increasing the temperature of wall bars when applying thermal insulation sharply reduces their service life due to high-temperature physical and chemical corrosion. Such a contradiction and a wide range of insulation products, as well as various modes of glass melting and intensity of forced cooling of the outer lateral surface of the furnace requires the choice of an optimal set of thermal insulation materials under the chosen conditions of furnace operation to ensure maximum operating life of the unit with maximum efficiency.
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