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宣钢9号高炉2005年10月投产,高炉有效容积为1800m3,喷煤系统采用了ZGM123N中速辊式磨煤机,大布袋一次收粉、两罐交叉并联倒罐喷吹、罐中央氮气流化板和罐底氮气流化装置等设备和工艺技术,设计制粉能力60t/h。在生产过程中,由于原煤煤质硬、煤质差、煤种杂以及设备存在的缺陷、设备关键部位磨损严重等原因,中速磨的台时产量没有达到60t/h的设计要求。通过对原煤配比比例、制粉各工艺参数的及时、有效的调整,原煤输送、中速磨磨机本体、制粉、喷吹等设备一系列改造后,提高了台时产量,截止2007年3月,9号高炉中速磨台时产量均达到了35t/h以上,故障发生率明显降低、提高了高炉喷吹煤粉量,提高喷煤比节焦降耗,确保了高炉顺行,达到了预期的效果。
The No.9 blast furnace of Xuanhua Iron and Steel Company was put into operation in October 2005 and the effective volume of the blast furnace is 1800m3. The coal injection system adopts the ZGM123N medium speed roller mill. The large bag once collects powder, the two cans cross parallel cans, the central nitrogen flow Plate and tank bottom nitrogen fluidized equipment and process equipment, design milling capacity of 60t / h. In the production process, the output of medium-speed mill does not reach the design requirement of 60t / h because of the hard coal, poor coal quality, coal variety and equipment defects, serious wear of key parts of the equipment. Through the ratio of raw coal, milling process parameters of the timely and effective adjustment of raw coal transportation, medium-speed mill body, milling, blowing and other equipment after a series of transformation to improve the Taiwan production, as of 2007 March, No. 9 blast furnace in the mill output reached 35t / h or more, the failure rate was significantly reduced, increased the amount of pulverized coal injection blast furnace to improve the coal injection than the coke consumption, to ensure the smooth blast furnace, Achieved the desired effect.