Types and Selection Precautions of High Temperature Glass for Observation Hole

        The material will release a lot of heat and light when burning, and the color of light is directly related to the temperature. The high-temperature glass of the fire observation hole is used to observe the color of the material when burning, so as to judge the temperature and production process, and understand the type and selection precautions of the high-temperature glass of the fire observation hole, which is of great significance to the production.


 

        Depending on the combustion temperature of the material and the distance between the observation hole and the flame, the observation hole glass can be divided into several types: 1200 ℃, 860 ℃, 500 ℃ and 300 ℃. Among them, 1200 ℃ observation hole glass and 860 ℃ observation hole glass are the most commonly used. Especially in the production of metal smelting, the temperature of the smelting furnace is as high as 1700 ℃, so it is necessary to use 1200 ℃ observation hole glass to observe the smelting situation, It should be noted that the 1200 ℃ fire observation hole glass is long, and its temperature resistance is 1200 ℃ and the maximum temperature resistance is 1500 ℃. Because its thermal expansion coefficient is very small, it can withstand the temperature difference of 1100 ℃, even if the molten metal splashes on the glass during smelting, it will not break the glass.

        When selecting the high-temperature glass of fire observation hole, the following matters need to be paid attention to:

        1. Temperature value at fire observation hole

        The temperature value at the observation hole is not equal to the temperature value at the time of material combustion or the central temperature value of the furnace body. This is because the distance between the place where the observation hole glass is installed and the central hot spot is different. The furnace temperature of some heating furnaces is very high, but the observation hole is far away from the central hot spot, and the temperature value at the observation hole is not so high. Therefore, when selecting the observation hole glass, first determine the temperature value at the observation hole.

        2. Mechanical strength

        At this time, the glass can burn under certain pressure, but some substances can burn under certain pressure under certain pressure.

In addition, when selecting high-temperature fire observation hole glass, we should also pay attention to its light transmittance, size, shape, etc.

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