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Regarding the scarring at the discharge ports and suggestions for dealing with it: Since the furnace was put into operation in October, accumulation has occurred at discharge ports 2# and 3# of the large furnace; accumulation also appeared at discharge port 2# during night shifts. Through proactive measures, the scarring did not spread, and it gradually disappeared after being washed away by the furnace charge, with the temperature returning to normal. After discussing and analyzing the scorching issues at these two feed port temperature points, the following operational recommendations are proposed: First, in the case of scorching due to high temperatures, take the following actions: 1. Stop feeding material and monitor the rise in temperature; 2. Use a stick to inspect the condition of the area around the feed port; 3. Prepare water pipes to deal with possible high temperatures; 4. If there are minor scorch marks, use a stick to clear them away and push the mineral powder accumulated around the thermocouple to make it loose. 5. Reduce the amount of ore fed in, and use water spraying to control the temperature at the feed port. 6. Observe the mineral feeding situation at this discharge port, and use a stick to inspect the ore inside the furnace. 7. Once the temperature at this discharge port returns to normal, the ore feeding rate is gradually adjusted to normal levels. 8. If the scab is large and difficult to pierce, the amount of ore fed should be reduced, and the machine should be stopped for treatment to prevent the situation from worsening further. Once cleaning is complete, resume driving normally. II. Low-temperature scarring: In the event of low-temperature scarring, the following actions should be taken: 1. Stop feeding material, and use a stick to inspect the area around the feed port; 2. If there are minor scabs, use a stick to clear them away, and push the mineral powder accumulated around the thermocouple to make it loose. Observe the temperature changes. 3. Observe the temperature at this discharge port, and use a stick to inspect the material inside the furnace. 4. Once the temperature at this discharge port returns to normal, resume ore feeding, and gradually adjust the amount of ore fed to normal levels. 5. Prepare water pipes to deal with possible high temperatures. 6. If the scarred area is large and probing or throwing methods are not effective, stop the machine for treatment to prevent the situation from worsening. Once cleaning is complete, resume driving normally. By analyzing the scarring occurrences in both instances and drawing lessons from them, efforts are made to prevent similar situations from happening. All team operators are required to abide by labor discipline during working hours, pay close attention to the temperatures at the three feeding points, ensure that the amount of ore fed and the ratio of air to ore are appropriate, regularly monitor the feeding process, and frequently check the condition of the furnace. In the event of any problems, prompt and decisive judgments must be made to address them. The 300,000-ton roasting system consists of three pre-chambers and a furnace chamber. The pre-chambers serve as the areas for feeding the ore; if scaling accumulates there and cannot be removed in time, it becomes impossible to feed ore, which severely affects the proper operation of the system, eventually leading to its shutdown for maintenance. All teams are specifically required to operate in a strict, careful, and meticulous manner. A Leaf of Green Tea, October 15, 2015