Industrial Test of Titanium Powder and Pulverized Coal Co-injection
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摘要: 钛煤混喷是将富钛粉加入原煤中制成钛煤粉,从风口喷入高炉的工艺过程。为验证钛煤混喷的实际效果,在国内某2 500 m3级高炉进行了钛煤混喷工业试验。试验结果显示,钛煤混喷可利用原有喷煤设施进行。在喷吹入炉钛负荷为3.7 kg/t时,铁水[Ti]含量达到0.13%,同样铁水[Ti]含量则需炉顶钛矿带入TiO2负荷为7.7 kg/t,钛煤混喷时钛的还原率明显高于炉顶加入钛矿。炉缸二段冷却水温差数据基本保持稳定。炉缸下部和炉底的维护需要更为综合性的措施。Abstract: Titanium powder and pulverized coal co-injection is the process in which rich titanium powder is mixed with raw coal and injected into blast furnace through tuyeres.The industrial test of titanium powder and pulverized coal co-injection was carried out in a 2 500 m3 blast furnace to verify the practical effect.The experimental result showed that the process can be carried out by the existing PCI system.The [Ti] in hot metal reached 0.13% when the injection TiO2 was 3.7 kg/t,while the same percent of [Ti]in hot metal needed 7.7 kg/t TiO2 being added from the top of the furnace as titanium ore.The reduction utilization rate of TiO2 from titanium-coal mixture was obviously higher than that of the titanium ore.The temperature difference of the cooling water in the second section of the hearth remained stable during the test.The maintenance of the lower part and the bottom of the hearth needs more integrated measures.
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Key words:
- BF /
- titanium powder and pulverized coal co-injection /
- hearth protection /
- hot metal /
- reduction ratio
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