Up to now, the iron and steel making process in the iron and steel industry is a relatively stable user of oxygen. Application of oxygen in iron and steel industry:
1. Oxygen top blown converter steelmaking: oxygen top blown converter steelmaking is characterized by short smelting cycle, large output and low energy consumption, and the oxygen consumption per ton of steel for top blown converter steelmaking is 50~60Nm ³。
2. Blast furnace oxygen enriched blast ironmaking: blast furnace oxygen enriched blast ironmaking can improve furnace temperature, reduce coke ratio and increase output. When the oxygen content in blast furnace increases by 1%, the iron output will increase by 4-6% and the coke ratio will decrease by 5-6%. The oxygen consumption per ton of iron is 45Nm when oxygen enrichment is 3-4% ³。
3. Electric furnace steelmaking: electric furnace oxygen blowing steelmaking can shorten melting time, reduce heat loss and reduce unit power consumption. 1 m oxygen blowing per ton of steel ³ It can save electricity by 5kWh, and the oxygen consumption per ton of steel for electric furnace steelmaking is 55~65Nm ³。
4. Smelting reduction iron making: this is a new iron making process, which replaces the three-stage production process of sintering, coking and blast furnace, and can reduce production costs and pollution, but the oxygen consumption per ton of iron is up to 530~550Nm ³， It is 10 times of that of oxygen top blown converter.
5. Steel processing: during steel processing, continuous casting flame cutting, cleaning, etc., the oxygen consumption per ton of steel is 10~12Nm ³。
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