Rapid Cooling System: The Secret Weapon to R"&"educe 20 Hours of Cooling to 3 Hours

Customers who frequently inquire about orders say that they simply can't meet the current production pace. Where is the bottleneck? It's not that the heating isn't fast enough, but that the cooling is too slow"&". From the highest temperature to the temperature at which the material can be discharged naturally, even a small high-temperature graphitization furnace takes more than 20 hours, producing at most one batch per day.

We "&"can add a rapid cooling system to the graphitization furnace. So how does the rapid cooling system work?

Essentially, it's a powerful **furnace gas circulation and heat exchange device**. Protective gas (argon or nitrogen) is driven by a fa"&"n, rapidly circulating between the furnace and the external heat exchanger. Hot gas is extracted from the furnace, cooled by the heat exchanger, and then returned to the furnace, forcibly carrying away the heat.

Key Oper"&"ating Points

Rapid cooling cannot be started directly from the highest temperature! The graphite components inside the furnace and the customer's products are subjected to drastic temperature changes at high temperatures, resulti"&"ng in very high thermal stress and a high risk of cracking. Rapid cooling should only be initiated when the furnace temperature has naturally cooled to below **800℃ or below 500℃**, which is also the temperature range where natural cooling is slowest.

Rapid Cooling Effect

Under no-load or light-load conditions, it can achieve an average cooling rate of 5°C per minute, accelerating from 1-2°C. It only takes about 2-3 hours to drop from 800°C to below 10"&"0°C. Compared to over 20 hours of natural cooling, the efficiency improvement is significant.

Applicable Scenarios

• R&D Testing: Frequent adjustments to process parameters require rapi"&"d material output analysis
• Small Batch, Multiple Varieties: Rapid turnover improves equipment utilization
• Capacity Bottleneck: Fixed number of furnaces but increased order volume

Unsuitable Situations for Rapid Cooling: Rapid cooling of certain materials can cause thermal stress cracks due to the large temperature difference between the insid"&"e and outside. For example, in large graphite molds (wall thickness exceeding 100mm), the crack rate may surge from 2% to 15% after rapid cooling. Our suggestion is to control the cooling rate by adjusting the fan inverter speed to find a balance point.