Progress of BF Oxygen-enriched Blasting Technology
BF oxygen-enriched blasting technologies advances greatly,represented by promotion and application of advanced new type of oxygen-coal lance,SIP,and other high-rate oxygen enrichment technologies.However,some problems also ap-pear after applying high-rate oxygen enrichment.The main ones are the phenomenon of"cold at the upper part and hot at the lower part of the furnace"and development of edge gas flow,which affect the stability and smooth running of the furnace.In 2020,Xinjiang Bagang launches the test of oxygen enriched smelting,and achieves 35%oxygen enriched smelting at the first stage;In the second stage of test,it is designed to hit the goal of 50%oxygen-enriched smelting by using the OY fur-nace gas with CO2 removed,and tunneling the gas flow for smooth gas circulation.In the future,the BF technologies will de-velop along the way of higher and higher oxygen enrichment rate and pulverized coal injection amount until realizing 100%oxygen enriched smelting.