Industrial Test of Titanium Powder and Pulverized Coal Co-injection

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.