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。与上年度相比,焦比降低了３２．６ｋｇ／ｔ,煤比提高了２８．９ｋｇ／ｔ。其原因是采取了做对精料工作,改造喷煤系统,探索矮胖高炉合理的操作制度,加强技术管理等措施。     

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。     

负钢炼厂铁1999年降低入炉焦比攻关实践

包钢炼铁厂１９９９年降低入炉焦比攻关成果显著,焦比由９８年的４８４．６ｋｇ／ｔ,降至９９年的４５０．３ｋｇ／ｔ。烧结矿理化性能的改善,是入炉焦比降低的根本原因,加强基础管理,提高高炉技术操作水平是降低焦比的根本保证,提高富氧率、提高热风温度、提高煤比是降低焦比的直接原因,进一步改善原料质量、提高煤比是今后降低焦比的主攻方向。     

包钢炼铁厂1999年降低入炉焦比攻关实践

包钢炼铁厂１９９９年降低入炉焦比攻关成果显著,焦比由９８年的４８４．６ｋｇ／ｔ,降至９９年的４５０．３ｋｇ／ｔ。烧结矿理化性能的改善,是入炉焦比降低的根本原因,加强基础管理,提高高炉技术操作水平是降低焦比的根本保证,提高富氧率、提高热风湿度、提高煤比是降低焦比的直接原因。进一步改善原料质量、提高煤比是今后降低焦比的主攻方向。     

苏钢5号高炉大渣量条件下的强化炼

苏钢从１９９７年６月开始在５号高炉（１４０ｍ＾３）开展了在现有含铁炉料和大渣量（６００ｋｇ／ｔ），条件下获得高产高效和稳产、长效的攻关试验。通过不断改善原燃料质量，采取强化冶炼综合措施，实现经济运行，打破传统观念，贯彻多风口、高风速、高动能方针与大喷吹、富氧、高风湿相结合，获得了利用系数２．６￣２．７、混合烘气ＣＯ２１６．５％￣１７．２％、焦比５２０￣５３０ｋｇ／ｔ、煤比大于１００ｋｇ／ｔ、成本９     

安钢高炉喷煤技术的应用

介绍了安钢炼钢厂高炉喷煤的主要设备及工艺流程，分析了高炉喷煤后取喷煤土７６．８４ｋｇ／ｔ，焦比降低６６ｋｇ／ｔ的冶炼效果及原因，指出了目前喷烩煤系统存在一些问题及今后改造措施。     

安钢2#高炉富氧喷煤实践

安钢２＃高炉１９９６年煤比为５０ｋｇ／ｔ,近几年来,通过采取一系列措施,如改进喷煤设备和工艺,改善原燃料条件,改进高炉操作等,煤比逐年提高,１９９９年利用系数达到２．７３ｔ／ｍ３ｄ;焦比达到４５５ｋｇ／ｔ煤经达到１２４ｋｇ／ｔ。     

包钢炼铁厂降低入炉焦比实践

炼铁厂１９９７年欠将入炉焦比降到５００ｋｇ／ｔ以下达 到４９２．９ｋｇ／ｔ，本文介绍了降低焦比的技术措施和管理经验。     

柳钢高炉高产低耗生产实践

近年来，柳钢通过改造风机，改善原燃料的质量，加强高炉操作，努力增加喷煤量，使高炉生产取得了较大的进展，１９９７年３￣６月高炉平均利用系数为２．３７４，平均焦比为５１４ｋｇ／ｔ。     

天铁高炉喷煤技术的发展及前景

天津铁厂自１９８８年开始高炉采用喷吹煤粉技术，发展较快，煤比由１６ｋｇ／ｔ增加到１００ｋｇ／ｔ，焦比由５７４ｋｇ／ｔ，高炉冶炼强度和昨用系数都显著提高，取得较好的经济效益和社会效益。     

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.     

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。     

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。     

宝钢2号高炉喷煤生产实践

宝钢２号高炉喷煤系统于１９９２年５月份投入运行，１９９４年３月份喷煤量达到了１１７．６ｋｇ／ｔ铁（１００％高挥发分烟煤），接近设计最大能力（１２０ｋｇ／ｔ铁）。     

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。     

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。     

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.     

荷兰霍戈文高炉高煤比操作实践

荷兰霍戈文高炉在相当长的一段时间内煤比保持在１８０￣２００ｋｇ／ｔ，今年以来煤比又进一步提高到２１０ｋｇ／ｔ，霍戈文高炉能保持这么高的煤比生产，除了喷煤工艺及设备先进合理外，关键还在于先进的生产操作技术，诸如：合理的煤气流分布；加强炉顶布料，降低渣比，高富氧（富氧率为６％￣８％），低风速（鼓风速度控制在１９０￣２００ｍ／ｓ）；开发实用的数学模型，指导高炉操作。     

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.     

天铁高炉经济喷煤量的试验研究

通过天铁2号高炉(550m~3)为期1个月喷煤量与煤焦置换比关系的试验,重点研究了高炉的经济喷煤量问题。试验结果表明,不富氧条件下,目前天铁高炉的经济喷煤量M_j为100kg/t,其计算公式为M_j=179.1296—185.1852P_m/P_k,具有经济意义的极限煤焦置换比R为0.52,其计算公式为R≤P_m/P_k。