China has not formulated a unified detection standard for “temperature”, one of the key properties of aluminum silicate fiber cotton, resulting in confusion in the identification of temperature parameters. Different marks such as service temperature, maximum service temperature, limit temperature, classification temperature and long-term working temperature appear on fiber products, or two of them appear at the same time, which makes it difficult to adopt correctly. Some refractory fiber factories irresponsible marks and sales lead users to choose the wrong materials, In fact, the service temperature of aluminum silicate fiber material is not only related to the chemical composition of the material, but also closely related to the service atmosphere, fuel and environmental conditions. For example, the maximum temperature at which the basic performance of the same material remains unchanged in the standard atmosphere of the experimental resistance furnace is 1260 ℃, while the maximum service temperature in the oxidizing atmosphere and clean fuel will decrease by about 10 ℃; the maximum service temperature in the medium and strong reducing atmosphere will decrease by about 20 ℃; In the environment of burning heavy oil, the service temperature will be lower due to the erosion of sulfur, phosphorus and other elements on aluminum silicate fiber. Therefore, I think aluminum silicate fiber material standards and refractory fiber manufacturers should not mark the service temperature, but the maximum temperature at which the basic performance of the material remains unchanged in the standard atmosphere, that is, the classification temperature. The service temperature shall be determined by designers, users and technicians of fiber manufacturers according to the fuel, environment and heating system. China should formulate a unified classification temperature detection standard and connect with international standards.
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