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湘钢两座750米~3常压高炉是在1982年6月开始喷煤的。今年以来喷煤已转入正常生产,并收到了显著效益。两年多来共喷吹煤粉4.98万吨左右,节约焦炭3.49万吨,节约资金101万元,而整个喷煤工程总投资为324万元,若以喷煤100公斤/吨铁、置换比0.7、年产生铁46万吨计,再有2年多的时间全部投资即可收回。若以最近几个月喷吹量80公斤/吨铁计,可降低生铁成本1.62元/吨铁。此外,喷煤后,高炉顺行,炉温稳定,炉缸活跃,炉渣脱硫能力增加,可以控制在较低的炉温下生产,允许降低生铁含硅量,炼出
Xiangtan Iron and Steel two 750 m ~ 3 atmospheric blast furnace in 1982 June began coal injection. This year, coal injection has been transferred to normal production and received significant benefits. Over the past two years, a total of 49,800 tons of pulverized coal were injected, saving 34,900 tons of coke and saving 1.01 million yuan. The total investment for the coal injection project was 3.24 million yuan. If the coal is 100 kg / 0.7, with an annual output of 460,000 tons of iron, then there are more than two years all the investment can be recovered. If the injection rate in recent months, 80 kg / ton iron meter, pig iron can reduce the cost of 1.62 yuan / tonne iron. In addition, coal injection, the blast furnace along the line, the furnace temperature is stable, active hearth, slag desulfurization capacity increases, you can control the production at lower furnace temperatures, allowing the reduction of silicon content of pig iron, refining