What are the differences in the structure of the blast furnaces used in sintering with a sintering machine, in reduction processes using an oxidizing blast furnace, and in lead smelting using an oxidizing blast furnace with oxygen bottom-blowing?
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What are the differences in the structure of the blast furnaces between sintering in a sintering machine, reduction in an oxygen-bottom-blown oxidation blast furnace, and lead smelting using reduction in an oxygen-bottom-blown oxidation blast furnace?
Initially, the blast furnaces used for processing high-lead slag at Yu Guang adopted a double-row tuyere structure, but the results were not satisfactory: the focus in the tuyere area shifted upward, fuel consumption was high, and operation was difficult. The blast furnaces designed later all adopted the same structure as those for sintered briquettes, achieving good results. Generally, the blast pressure in a blast furnace used for processing high-lead slag should be higher than that in a blast furnace used for sintered pellets; the air volume should be lower, and the air-coke ratio should be lower. But the structure of the blast furnace is exactly the same.
Thanks for the advice, bro. Is the higher wind pressure based on the fact that its air permeability is worse than that of sintered blocks? And is the lower air volume due to considerations related to the reducing atmosphere, or are there other reasons? ； I don’t understand it; please, guy, help me explain it. I would like to express my thanks in advance.
Basically, it’s for the reasons you mentioned: the high wind pressure is due to the poor air permeability of the high-lead slag; the low air volume is because the high-lead slag is clinker, which requires less oxygen; and the low air-coke ratio is because the high-lead slag reacts rapidly and thus needs a stronger reducing atmosphere.
Actually, there’s no difference; it’s just that the raw materials used are different – one is sintered pellets, and the other is high-lead slag! Sintered blocks have good air permeability, while high-lead slag has poor air permeability! Therefore, the control parameters during the melting process—such as air volume, air pressure, height of the material column, agitation level, and the amount of supplementary materials added—are all different! But the internal metallurgical reactions are the same!
What was said on floors 2/4 is absolutely correct. We used to be like this.