Graphitization Furnace Accident Case Analysis: Learning from Lessons Le"&"arned

Real accident cases provide the most profound safety education. The following three cases are from real events within the industry (anonymized), hoping to serve as a wake-up call.

Case 1: Rapid Cooling Leads"&" to Entire Furnace's Failure

Process: During the night shift handover, an operator at a factory, eager to finish get off work and cool down the furnace, manually increased the cooling rate from the set 3℃/min to 15℃/min. As a res"&"ult, an entire furnace of semiconductor-grade graphite crucibles, worth 300,000 yuan, cracked and became unusable.

Reason:Violation of operating procedures, unauthorized increase in cooling rate.

Lesson:The cooling rate must never be accelerated without process verification. Saving an hour in haste resulted in a loss of 300,000.

Case Two: Seal Failure Leads to Oxidation of High-Purity Products

Process:"&"The O-ring seals of a graphitization furnace in a certain factory aged and were not replaced in time, allowing trace amounts of air to seep in during the graphitization process. The surface of one batch of high-purity graphite products was comple"&"tely oxidized and turned white, with the purity dropping from 99.99% to 99.9%, leading to customer rejection.

Reason:The seals were beyond their service life and were not replaced as scheduled.

Lesson:Seal"&"s are consumables and must be replaced regularly according to the maintenance plan. Saving the money for one set of seals resulted in the loss of an entire batch of products.

Case 3: Water Outage Causes Coil Burnout

Process: A factory's cooling water pump motor failed and stopped. The standby pump did not start automatically (due to incorrect electrical wiring). The induction coil overheated and burned out within 30 minutes, resulting in a di"&"rect loss of 500,000 yuan and a two-week shutdown for repairs.

Cause: The standby pump's automatic start function failed, turning double protection into single-layer protection.

Lesson: Safety protection s"&"ystems must be tested regularly; they cannot be ignored simply because they are assumed to work.

Summary: The common thread in these three cases is that they "&"were all caused by human error or inadequate maintenance; the equipment itself was not faulty. No matter how reliable the equipment, and although technology is constantly evolving, proper operation and maintenance by humans are still essential.

Lesson"&"s from the past serve as guidance for the future.")