共查询到19条相似文献,搜索用时 46 毫秒
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论述了转炉煤气干法除尘灰的产生及理化性质,并介绍了转炉干法除尘灰回收利用的工艺流程及应用实践情况。实践表明,采用炼钢干法除尘灰,配加少量锰矿和石英砂以及黏结剂制备的XG型复合造渣剂,作为转炉造渣剂用于炼钢;采用炼钢干法除尘灰,配加筛焦除尘灰以及黏结剂制备的铁碳复合球团用于炼钢,具有可观的经济效益、社会效益和环境效益。 相似文献
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为实现除尘灰的资源化利用和铁水的有效预脱磷,尝试利用转炉二次除尘灰制备铁水脱磷剂具有现实意义。通过两种转炉二次除尘灰以不同比例替换纯脱磷剂中的有效成分进行脱磷试验,从而找到最佳的除尘灰替换比。试验结果表明,在使用除尘灰基脱磷剂后,两种脱磷剂的最高脱磷率分别达到52%和30%,脱磷终渣中P2O5活度系数明显降低,终渣磷容量显著增加,但磷分配比相对下降。另外,除尘灰基脱磷剂还具有较高的脱硅和脱硫效果,且最大脱除率均超过95%,这说明该脱磷剂能够同时实现铁水的预处理“三脱”作业,从而为除尘灰的二次利用提供了一条新的途径。 相似文献
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针对西昌钢钒转炉干法除尘系统,在分析转炉干法除尘系统泄爆机理的基础上,通过转炉干法除尘系统装料制度控制、氧枪操作制度控制、造渣制度控制、联锁控制条件优化控制及干法除尘系统EC水量、温度控制等系列控制技术的开发应用,实现了转炉干法除尘零泄爆。系统放散烟气含尘量降到6.2mg/Nm3(4mg/Nm3~11mg/Nm3),煤气回收量提高到129Nm3/t钢,蒸汽回收量105kg/t钢,系统节约电耗为3.01kW/t钢,节约循环水消耗2.46t/t钢,净煤气含尘浓度<10mg/Nm3(0.1mg/Nm3~1.0mg/Nm3),炼钢除尘灰量16.4kg/t钢等技术经济指标,解决了除尘系统水污染问题,实现了烟气的无污染排放,具有显著的经济效益和社会效益。 相似文献
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转炉污泥是转炉炼钢的副产品,其铁量极高,用它制成复合球团造渣剂,用于炼钢生产,可明显改善化渣效果,减少物料消耗。介绍了复合球团研制的最佳工艺和制作过程,并对使用复合球团前后的效果作了对比。 相似文献
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转炉冶炼的高效化与生产过程的清洁化已成为现代炼钢技术发展的核心任务,中厚板卷厂通过比较几种化渣剂的化渣机理,研究无氟复合造渣剂的使用方法。实现了转炉生产全程化渣、降低了钢铁料消耗、消除了氟离子污染,取得了明显的经济效益。 相似文献
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为了提高冷固球团返回转炉中的利用效率和降低冶炼原料成本,分别对除尘灰原料和生产工艺、冷固球团的生产以及冷固球团在转炉的应用实践3部分内容进行分析。研究结果表明,干法除尘灰含铁量较高,其中粗灰的含铁量最高可以达到89.94%,可选用淀粉胶作为生产冷固球团的黏结剂;冷固球团成型的关键之一是加入适量的水进行消化,实际生产中应控制加水量为5%~7%、消化时间为8~12 h。通过实践证明,冷固球团加入转炉后具有明显的冷却和化渣效果。通过冷固球团的使用效果研究表明,冷固球团能减少副原料消耗和提高金属使用率,一年可以增效益4 903.64万元。 相似文献
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针对莱钢120t转炉煤气干法除尘系统,简要介绍了其控制系统的硬件配置,详细阐述了蒸发冷却器喷水预设定控制、出口温度自学习控制、静电除尘器电场自记忆控制、转炉烟罩微差压阻尼控制、输灰系统双摆阀逻辑控制、引风机吸气自选择控制、切换站压力无扰动切换控制等功能。 相似文献
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《Baosteel Technical Research》2010,(Z1):133
Environmental requirements world wide and in the P.R.of China in particular have increased and authorities are increasing the pressure on steelmakers to comply with always more stringent limits and standards. Modern converter steel making goes along with the innovation and new developments not only for the primary converter process itself but even more for the dedusting technologies.This paper describes the benefits and latest development of advanced off gas cleaning and recovery systems based on dry type cleaning with electrostatic precipitation and wet type gas cleaning based on wet scrubbers.Modern converter dedusting is based on suppressed combustion systems in order to reduce off gas amounts and to be able to use the gas for gas recovery.The dry type primary off gas treatment system based on electrostatic precipitator technology is the most advanced environmental solution available for converter steel making.Dry dedusting has been introduced in China successfully with a significant contribution by Siemens VAI being the market leader for converter dry dedusting systems.Siemens VAI has introduced several design improvements over the last years such as CFD modeling of flow conditions in evaporation cooler,design of chains for dust conveyors,design of ESP inlet,design and thickness of discharge electrodes and operation in energy saving mode.Additionally the DDS process has been successfully implemented in China for the De-P process.The gas recovery system for DDS has been optimized over the years with high quality equipment and integrated automation and control systems.Wet type dedusting for converter gas is a well proven technology for many years and is still widely used due to the simplicity of the process and the lower investment costs.SVAI has continuously improved it’s wet dedusting technologies to provide highly energy efficient systems which can achieve lowest levels of clean gas dust while still maintaining a moderate water and energy consumption with simplified process control and standardized process control packages.Main design and process improvements include expansion joints for connection of scrubber to cooling stack,new type of droplet separator,advanced hood pressure control package,ID fan washing system,ID fan speed control system etc.The focus for wet type gas recovery systems is still on maximum safety and reliability.SVAI has also successfully improved the technological packages for converter gas recovery for wet type dedusting systems.The comparison between the two system shows the advantages of dry dedusting mainly being the lowest clean gas dust content, lower operating costs,easier handling for recycling of residuals and no need for a water treatment plants.Wet type dedusting has it’s main advantages in the simple process and operation of the system,the flexible layout solutions inside the steel shop as well as generally lower investment costs.An overview on the numerous reference installations for dry- and wet type dedusting systems in China as well as world wide is given. 相似文献
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