共查询到17条相似文献,搜索用时 296 毫秒
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为改善焦炭质量,在实验室试验的基础上,进行了向焦炭表面喷洒一定温度和浓度焦炭钝化剂溶液的焦炭钝化技术应用试验,喷洒点设在焦炭进入矿焦槽之前的外围转运站,蒸汽作为加热与搅拌手段。结果表明,焦炭热态指标明显改善,CRI降低2%以上,CSR提高2%以上,喷洒工艺简单易行,高炉稳定顺行,综合焦比降低20.39kg/t。 相似文献
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针对阳春新钢铁炼铁高炉所采购焦炭品种多、质量波动大,造成高炉炉况波动、成本偏高的问题,进行了焦炭提质增效的工业性试验研究。通过向焦炭立体喷洒ZBS焦炭改质剂,研究了ZBS改质剂与焦炭的相互作用行为,阐述了ZBS改性机理。研究发现,经过ZBS改性后的焦炭形成了碳的络合物和化合物,改变了碳的结构,提高了焦炭的石墨化度。经ZBS改质剂处理后,焦炭反应性(CRI)平均降低5.2%,反应后强度(CSR)平均提高7.83%。相较于基准期,高炉炉温波动小,硫含量合格, 生铁合格率达到100%。试验的1号高炉日产提高75 t,入炉焦比降低33.8 kg/t,综合燃料比降低11.63 kg/t。通过项目实施,达到了高炉稳产、增产、降低焦炭用量的目的,为高炉炼铁增产降耗提供了一种新方法。 相似文献
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喷洒焦炭钝化剂的生产实践 总被引:1,自引:0,他引:1
针对高炉焦比不断降低,煤比不断提高,高炉透气性和透液性变差的实际情况,本钢炼铁厂在6号高炉进行了喷洒焦炭钝化剂的试验,同时介绍了7号高炉采用喷洒钝化剂焦炭的实际应用效果。实践表明,将钝化剂按一定比例均匀地喷洒在焦炭表面后,焦炭反应性得到了提高,高炉实现了顺行。 相似文献
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ZHU Zi-zong ZHANG Zhu-ming TANG Qi-yong YANG Xue-feng ZHANG Kun-hua ZHAO Xian-sheng 《钢铁研究学报(英文版)》2006,13(3):14-17
In order to improve the thermal properties of coke, an industrial experiment on the coke spraying with ZBS additive solution was carried out at coking plant and No. 6 blast furnace (2 000 m^3 ) of Kunming Iron and Steel Co Ltd. The coke reaction index (CRI) of the coke spraying with ZBS additive solution decreases by 10. 56 %, and the coke strength after reaction (CSR) increases by 7.80% in comparison with those of the un-sprayed coke. During the experiment, the average iron output increases by 66. 69 t/d, and the coke rate is reduced by 5. 21 kg per ton iron, while the fluctuation of furnace temperture is small, and sulphur content in hot metal and 100% of hot metal are acceptable. 相似文献
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钢铁工业是支撑国民经济发展的基础产业,同时也属于资源和能源密集型行业,随着国家严格的环保政策的逐渐实施,其面临的资源和环保要求日益增加。传统高炉炼铁生产工艺由于存在能耗高、污染物排放多的弊端,发展受到了限制,因此非高炉炼铁工艺的研究和应用日益受到钢铁行业的重视。系统研究了COREX熔融还原非高炉炼铁工艺使用的顶装焦、捣固焦和气煤焦在铁水中渗碳特性,并分析了3种不同样品在铁水中的渗碳动力学行为。研究结果表明,高温铁水与碳原子接触时发生渗碳反应的吉布斯自由能远小于Fe3C生成反应的吉布斯自由能,焦炭与高温铁水接触被消耗的过程以渗碳反应为主。顶装焦、捣固焦和气煤焦3种焦炭样品与高温液态铁水接触后迅速发生渗碳反应,铁水中碳含量快速增加,但铁水中碳含量增加的幅度随着铁水中碳含量的升高而快速降低,在渗碳反应时间超过120 min后铁水中的碳含量基本保持恒定。3种焦炭在铁水中的渗碳速率由高到低分别为气煤焦、顶装焦和捣固焦,铁水温度对渗碳过程具有明显的影响,随着温度的升高,渗碳速率和最终铁水中的碳含量增加。动力学分析表明,捣固焦在铁水中的渗碳活化能最高,顶装焦次之,气煤焦最小。 相似文献
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Blast furnace operation with hot burden charging was numerically simulated to preliminarily analyze its advantages and disadvantages.Multi-fluid blast furnace model was utilized to simulate hot burden charging operations under the conditions that the charging temperatures of pellet and coke were supposed separately or simultaneously as800℃.The results showed that,with hot burden charging,the furnace top temperature significantly increased in comparison to the conventional operation with cold burden charging.However,in-furnace temperature decreased,which decelerated the reduction rate of ferrous burdens.The concentrations of reducing gases were decreased in the furnace.The height of cohesive zone shifted downwards.When the charging temperatures of pellet and coke were simultaneously 800℃(PC800),coke rate,fuel rate and carbon emission rate were decreased by 13.4,22.1and19.25kg·t-1,respectively.The ratio of ore to coke,solid burden charging rate and hot metal productivity were increased by 4.79%,7.55kg·s-1 and 6.38%,respectively.Heat taken away by top gas and energy consumption per ton hot metal were increased by 68.97%and 6.40%,respectively.Generally speaking,hot burden charging was adverse to energy utilization of blast furnace. 相似文献
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吨焦耗煤指标的主要影响因素有配煤挥发分、焦炭挥发分、焦炭烧损率、焦灰产量、进厂煤水分化验、焦炭称量等,分析表明,因计算基础不同,各企业间的吨焦耗煤指标缺少比较的统一性。济钢焦化厂在焦炭全干熄和干熄焦灰不计入焦炭产量的前提条件下,经推算,吨焦耗煤指标值在1.375t左右。 相似文献
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