高炉富氧条件下喷煤极限研究

Research on Limit of PCI with Oxygen Enriched into Blast furnace

通过对攀钢４号高炉富氧条件下煤粉在风口回旋区内的燃烧率的数学模拟研究可知：在攀钢４号高炉入炉焦比５８０ｋｇ／ｔ，风温１０５０℃等生产条件下，当喷煤量超过１５５ｋｇ／ｔ，风中富氧率高于２％，才能使高炉顺行。如果风中富氧低于４％，吨铁最大喷煤量为１７５ｋｇ／ｔ．当喷煤量超过２１０ｋｇ／ｔ，风中富氧率即使达到１０％，也不能满足高炉最佳热状态，将造成未燃煤粉量过高，导致高炉不顺。

When a large amount of pulverized coal with oxygen enriched is injected into 4# blast furnace of Panzhihua I & S CO., the combustion of pulverized coal in raceway cavity has been studied theoretically and showed: if the coal ratio exceeds 155 kg/t, the blast oxygen enriched has to exceed 2%, The upper limit of coal injection is 175 kg/t if the blast oxygen enriched under 4% , the 4th blast furnace produce smoothly under the coke rate (580 kg/t), the blast temperature 1050℃.When the coal ratio exceeds 210 kg/t, although enriched oxygen reaches to 10% , it can not meet the optimum hot state of B.F, then it will cause the unburned pulverized coal to be too higher and meet troubles.