Is the furnace shell temperature high? The furnace shell temperature is"&" ≤45℃, mainly due to the three major technical means behind the distinct hot and cold conditions
The furnace chamber is 3000 degrees Celsius, where the furnace fire is at its peak; the outside of the furnace shell is no more than 45 degrees Celsi"&"us, keeping it cool and comfortable. This contrast between ""ice and fire"" is one of the most interesting aspects of graphitization furnace design. Many customers who visit for the first time can't help but reach out and touch the furnace shell—after tou"&"ching it, they usually nod and say, ""It's definitely not hot.""
This effect is achieved through the combined effect of three major technical means.
Standard: Stricter than National Standard
We implem"&"ent the GB/T 18110-2017 ""Safety of Industrial Furnaces and Related Process Equipment"" standard, with a general limit of 60-70℃ for burn prevention. Our target is below 45℃, significantly lower than the national standard"&". In summer, workshop temperatures are already high; if the furnace shell is also scalding hot, it will be unbearable for operators. New operators lack safety awareness, and the consequences of 45℃ and 70℃ are vastly different.
Method 1: Double-Layer Water-Cooled Furnace Shell
Circulating cooling water continuously flows between the double-layer furnace shell, carrying away all the heat dissipated through the insulation layer from the furnace chamber. The insulati"&"on layer itself has a very low thermal conductivity, so the amount of heat transmitted is minimal, and the cooling water is more than sufficient to remove this heat.
The furnace shell temperature is consistently maintained below 45℃, even when the fur"&"nace reaches its maximum operating temperature. **Method Two: High-Efficiency Insulation Layer** The furnace interior employs a multi-layer graphite felt insulation structure. Graphite felt has extremely low thermal conductivity, resulting in better ins"&"ulation performance at high temperatures. Heat is conducted from the center of the furnace outwards, passing through layer after layer of graphite felt, with each layer retaining the majority of the heat. By the time the heat reaches the edge of the outer"&"most insulation layer, it is almost depleted. Preventing heat loss allows the furnace temperature to rise, achieving two goals at once. **Method Three: Localized Reinforcement** While overall temperature control is good, localized areas such as near the"&" observation window, flange connections, and electrode leads may experience higher temperatures. Adding **extra heat shields or auxiliary air-cooling measures** to these hotspot areas helps to suppress localized hotspots. Warning labels are also affixed t"&"o our graphitization furnaces at these hotspots. **Significance:** A low furnace shell temperature is not just a safety indicator—it means less heat is lost to the workshop environment, resulting in energy savings; it also means better insulation and hig"&"her heating efficiency, which is economically beneficial. While the extra cost may appear to be for insulation and cooling, the savings over the years are ultimately recouped.")