韶钢2号高炉高风温大喷煤实践

１９９６年，韶钢２号高炉通过强化内部管理，充分挖掘设备潜力，利用１１００℃的高风温，在不富氧的情况下，使煤比由２－６月份的平均７３ｋｇ／ｔ增加到７－１２月份的平均１１２ｋｇ／ｔ。喷煤量增加后，高炉焦比下降（由２－６月份的５４５ｋｇ／ｔ降到７０１２月份的４７９ｋｇ／ｔ）、炉况顺行稳定。     

1998年世界炼铁技术十大要闻

１我国宝钢高炉喷煤技术达世界先进水平截止到１９９８年１１月,宝钢２号高炉（４０６３ｍ３）月均喷煤达２０５ｋｇ／ｔ铁,焦比３０５６ｋｇ／ｔ铁,利用系数２１６ｔ铁／ｍ３·ｄ,富氧率２１３％,该炉１９９８年前１０个月月平均喷煤１７４ｋｇ／ｔ铁,燃料...     

300m^3高炉喷煤实践

安钢１高炉１９９５年９月开始喷煤，经过实践探索，取得冶炼效果，１９９５年１２月份喷煤量达到９４．０１ｋｇ／ｔ，日喷煤量高达１１０ｋｇ／ｔ。     

格里13号高炉9个月内喷煤量达到182kg／t铁

格里１３号高炉９个月内喷煤量达到１８２ｋｇ／ｔ铁［美］Ｇ．Ｊ．Ｓｈｅｒｍａｎ等１概况格里１３号高炉从１９９３年３月开始喷煤。喷煤量在随后的９个月内一直不断增加，到１９９３年１２月喷煤量已达到１８５ｋｇ／ｔ铁（见图１）。喷煤量达到这样高的水平最重要的有...     

福山厂4号高炉218kg／t的高喷煤比

１９９４年４月末，福山厂４号高炉安装了一套能力为７２ｔ／ｈ的喷吹煤粉系统，６个月之后，在１０月份，实现了最高的喷煤比，最终成功地实现了最大喷煤比２３０ｋｇ／ｔ，月平均２１８ｋｇ／ｔ。之所以能达到如此高的喷煤比，其主要技术特点如下：（１）采用新设计的不同圆心双喷枪，确保高燃烧效率；（２）使用还原与熔化性能良好的球团烧结矿（ＨＰＳ）；（３）优化控制煤气流分布，保持炉内透气性，此外，用固定探针分析下部的     

霍戈文钢铁公司艾莫伊登厂高喷煤比技术的发展

霍戈文钢铁公司６号高炉在１９９２年６～１１月进行了喷煤比１９０ｋｇ／ｔ铁的试验，１１～１２月进行了２１０ｋｇ／ｔ铁的试验，试验中发现要控制炉料水分和稳定煤气流，并要采取适当的休风措施，以稳定炉况。喷煤比从１３０ｋｇ／ｔ铁提高到２１０ｋｇ／ｔ铁，要求适当提高鼓风含量，由２２．５％提高到２６．５％。     

宝钢2号高炉操作技术的进步

宝钢２号高炉（４０６３ｍ＾３）采用串罐无料钟炉顶和喷吹煤粉工艺，自１９９１年６月投产以来，采用小块焦混入矿层入炉法、无料钟布料方式优化、低硅冶炼、较高喷煤比操作等技术，１９９３年底生铁含硅降至０．３５％，１９９４年１１月份喷煤量达到１２５ｋｇ／ｔ铁，高炉操作稳定顺行。     

于齐诺尔萨西诺尔高炉喷煤的发展

于齐诺尔萨西诺尔高炉喷煤的发展［法］Ｊ．Ｍ．Ｓｔｅｉｌｅｒ等１引言最近的１５年中，高炉喷煤已成为标准操作。今天，在许多高炉的常规操作中喷煤率已达到１９０～２１０ｋｇ／ｔ铁，主要动机是降低炼铁的焦比：（１）在短期内，使高炉能耗得到显著下降；（２）在中长...     

加古川厂1号高炉高喷煤比操作

加古川厂１号高炉于１９９２年１０月完成喷煤系统扩建后，其喷煤比提高到１００ｇ／ｔ铁以上。为了实现高喷煤比稳定操作，根据炉内状态测量仪器收集的资料对炉料分布和回旋区条件做了一些改善，结果，于１９９３年１０月喷煤比已超过１８０ｋｇ／ｔ铁以上，目前正在继续稳定操作。     

吴厂高炉大量喷吹煤粉操作

在吴厂，高炉连续以高利用系数运行，同时，也获得了较高的喷煤比。在提高喷煤比的过程中，对于因煤焦转换比降低而引起的透气性恶化和燃烧比升高，采取了控制布料、富氧等一些对应措施。因此，１号高炉的喷煤比达到１２０ｋｇ／ｔ铁，２号高炉达到１５０ｋｇ／ｔ铁。     

天铁进一步提高喷煤量的措施探讨

各高炉喷煤量现已达到ｋｇ／ｔ左右，４号高炉１９９５年３月拳情况下喷煤量达１２６ｋｇ／ｔ。探讨了进一步提高喷本的技术措施，诸如：选择合适的鼓风动能；确保同行；实现均匀吹；适当提高煤粉细度；改造喷煤系统等。     

太钢4号高炉喷煤系统改造

太钢4号高炉喷吹系统原设计为双系列多支管喷吹方式,喷吹系统改造时改为总管加分配器喷吹方式,操作上由原来的两个系列同时喷煤改为两个系列交替喷煤。改造取得了较好的效果,喷煤量由70～80kg/t提高到100kg/t以上,压缩空气消耗量降低了90％,喷吹浓度由原来的6～10kg粉/kg气提高到40kg粉/kg气以上。     

首钢矮胖高炉喷煤生产实践

１９９６年，首钢炼铁厂的平均焦比为４６６．６ｋｇ／ｔ，平均煤比为７９．６ｋｇ／ｔ，与上年相比，焦比降低了３２．６ｋｇ／ｔ，煤比提高了２８．９ｌｋｇ／ｔ。能取得了这个成绩，是由于采取了以下主要措施：做好精料工作，改造喷煤系统，探索矮胖高炉合理的操作制度、加强技术管理。     

Industrial Practice of BiPCI Process of Pulverized Coal Injection for Blast Furnace Ironmaking at SSAB

BiPCI technology of pulverized coal injection for blast furnace ironmaking was applied to No.2 Blast Furnace of SSAB Oxelösund in Sweden, and notable effectiveness of this BiPCI practice at SSAB has been achieved. The results show that if the tuyere injection rate of pulverized coal is kept nearly unchanged, (1) BiPCI can increase the overall coal rate and decrease the coke rate. When the second injection rate of pulverized coal attains 5 kg/tHM, the coke rate could be reduced by 5 kg/tHM; (2) BiPCI can increase the burden permeability, decrease the pressure drop of the furnace, and produce proper gas flow distribution, which is favourable to keep smooth running of the blast furnace and decrease the total reducing agent rate (RAR). During the test, the RAR showed a decrease by 2.8 kg/tHM (corrected RAR by 1.45 kg/tHM); (3) The pulverized coal through the second injection can be effectively used to protect the coke from fast degradation and improve the coke strength in the blast furnace, which is favourable to lower the high requirement on the coke quality under high coal rate operation.     

鞍钢高炉喷吹煤粉合理配煤的试验研究

实验室研究及工业试验结果表明，高炉喷吹烟煤和无烟煤的混合煤的综合效果优于喷吹单一烟煤或无烟煤，研究结果还表明，在鞍钢生产条件下，对于１０００ｍ＾３级高炉，当煤比为１００ｋｇ／ｔ左右、不富氧或低富氧率时，混合煤的挥发分含量宜控制在１８％左右，当煤比进一步提高后，混合煤的挥发分含量应适当提高。     

太钢高炉最佳喷煤量的探讨

根据送风参数的喷煤实际数据，计算得出太钢４号高炉目前条件下的最佳煤比为１０８ｋｇ／ｔ。     

Circulation and accumulation of harmful elements in blast furnace and their impact on the fuel consumption

The circulation and accumulation of harmful elements in blast furnace were investigated. The results show that the maximum concentration of K and Na in the belly is about 50 times of that in the charge. The zinc increased by 80 times and the Pb is insignificant. The impact of the circulation and accumulation of K, Na, Pb and Zn on the fuel consumption was quantitatively analyzed using Rist diagram. The results show that the gas utilization decreased and the coke rate increased linearly with the increase of load and accumulation times of each harmful element. Given the accumulation times of each element, the loading of Na, K, Zn and Pb into BF leads to the increase of coke rate by 13.99 kg/tHM, 6.25 kg/tHM, 3.63 kg/tHM and 0.02 kg/tHM, respectively. The increased coke rate and the decreased gas utilization under various loads and accumulation times of each element was estimated.     

COREX喷煤燃烧利用的研究

喷吹的煤粉主要在回旋区内燃烧,COREX熔融气化炉的氧口回旋区较小,而回旋区空腔内氧气浓度高,燃烧带的理论燃烧温度高。采用数学模型计算了煤粉在氧口回旋区内的燃烧率。研究表明：当煤粉平均粒度为0．075mm,煤比不超过125kg／t时,煤粉在回旋区内的燃烧率可达65％以上。未燃煤粉将参与气化反应、直接还原和渗碳反应等过程。从这个角度分析,COREX熔融气化炉可接受的未燃煤粉量约为75kg／t;而在煤比为200kg／t时,COREX可接受的煤粉的燃烧率为60％左右。     

混煤及富氧措施提高喷煤量的试验研究

高炉喷煤是降低高炉炼铁生产成本的重要措施之一,根据某高炉现场原料在实验室条件下的煤粉燃烧性试验,以现场煤种、粉气比的煤粉燃烧率为基准,考察了烟煤配比、富氧对煤粉燃烧率的影响,试验结果表明：4种无烟煤中,S2煤是最佳混合喷吹的无烟煤;增加烟煤配比和采用富氧措施,可使煤粉的燃烧率提高 。当S1和S2混合煤中烟煤S1配比为67%,富氧3%时,喷煤比可比基准提高37 kg/t(HM)。     

Recycling of By‐Product Pellets as Burden in the Blast Furnace Process: A Lab and Pilot Scale Investigation

Cold bonded by‐product briquettes have been recycled in the blast furnace at SSAB Tunnplåt in Luleå since 1993. Recently, much effort has been made to increase the recycling of by‐products. One such project deals with the development of a cold bonded by‐product pellet (CBP) agglomerated from very fine dusts. The pellets used in these tests are produced from a blend containing BF flue dust, filter dust, briquette fines and BOF coarse dust as well as cement binder. The pellets were tested in the laboratory by reduction tests, softening and melting tests, thermo gravimetric analysis, differential thermo analysis, and mass spectrometry measurements. The test results indicate that the CBPs can disintegrate during reduction in the BF shaft, are self‐reducing to a high extent and, as a supplement to the normal ferrous burden, they show quite good softening and melting properties. A pilot scale test in LKAB's experimental blast furnace was performed. CBPs were charged with rates of 150 kg/tHM, 299 kg/tHM and 344 kg/tHM respectively during test periods 1, 2 and 3. The blast furnace operation was very stable during test period 1 with 150 kg CBP/tHM, but the burden descent and gas distribution were disturbed during the periods with greater CBP burden content. The rate of reducing agents was significantly decreased and slag amount was increased when CBPs were charged.