冷轧罩式炉退火双相钢SX55的研制

鞍钢开发并试生产的冷轧罩式退火双相钢（ＳＸ５５），具有高强度、低屈强比、无屈服点延伸、均匀伸长率大、加工硬化性和烤漆硬化性强等特点．该钢还具有优良的疲劳性能、焊接性能以及优越的冷成型性和形状稳定性等强塑性的良好匹配。其力学性能达到了日本新日铁标准ＳＡＦＣ５５Ｄ水平，是我国目前强度级别最高的冷冲压用钢．     

模拟100tANS—OB控制[Al]s或（Al2O3）的水力模型试验

采用水力学模型试验，模拟ＡＮＳ－ＯＢ铝热法ＯＢ后处理精炼钢水中的［Ｓｌ］ｓ或（Ａｌ２Ｏ３）进入浸渍罩内数量变化，以及测定钢水罐中的浸渍罩内、外均匀混合时间长短、确定该精炼工艺钢水罐底部供气量和浸渍罩插入深度的最佳参数。结果是钢水罐底部供气量在０．１２￣０．１４ｍ＾３／ｈ，浸渍罩插入深度３３ｍｍ时，浸渍罩内外均匀混合时间最短，模拟［Ａｌ］ｓ或（Ａｌ２Ｏ３）的小球进入浸渍罩内的数量最多。     

冷轧Ti-IF钢再结晶温度测定及罩退工艺研究

为了摸索Ti-IF钢的罩退工艺,提高其性能,在Gleeble-3500热模拟试验机上测定了Ti-IF钢的再结晶温度,研究了退火温度、时间等主要因素对Ti-IF钢的再结晶金相组织及力学性能的影响。根据试验结果及罩式退火应用设备的特点,制订了退火工艺,随后进行了工业化生产,冷轧Ti-IF钢的力学性能完全可以满足用户的要求。     

冷轧退火含磷高强IF钢的组织和性能

在工业生产中,对罩式退火和连续退火方式生产的含磷高强无间隙原子钢的组织和性能进行研究,并与罩式退火生产的商用级铝镇静钢DC01和超深冲级无间隙原子钢DC04的成形性能进行对比,结果表明,含磷高强IF钢的成品组织均以等轴的铁素体为基体,力学性能满足标准要求,但罩式退火生产的含磷高强钢成形性能要显著地弱于连续退火产品,织构和位向分布函数测定表明,γ织构的密度按照罩式退火含磷钢、商用级DC01、连续退火加磷高强钢和DC04的顺序依次增加。     

罩式退火工艺对无间隙原子钢织构和性能的影响

在试验室对典型成分的Ｔｉ－ＩＦ钢和Ｔｉ＋Ｎｂ－ＩＦ钢的罩式退火工艺进行了模拟试验，找到了罩式退火工艺（主要是退火温度和保温时间）对ＩＦ钢性能的影响规律，为优化ＩＦ钢罩式退火工艺提供了依据。     

钢包浸渍罩钢液喷粉脱硫试验研究

采用２５０ｋｇ感应炉研究了钢包浸渍罩钢液喷粉脱硫工艺，热态模拟试验表明：该工艺可以将钢液硫含量脱除到０．００３０％以下。同时还可降低钢中氮含量。     

汽车用冷轧低合金高强钢HC340LA的开发生产

从炼钢、热轧、冷轧、罩式退火、精整等生产工序进行控制与优化,分析了工艺参数对HC340LA钢力学性能和金相组织的影响,成功研发了罩式退火工艺下的汽车用冷轧低合金高强钢HC340LA,并实现了订单生产,产品各项力学性能指标均达到标准要求且有较大富余量。     

降低CrMo钢硬度的研究及改进措施

为降低CrMo钢热轧硬度,进行了CrMo钢连续冷却相变试验,研究了高温相变时间、优化了轧制工艺、控制CrMo钢加热温度,采用了冷床加保温罩等措施,将CrMo钢的热轧硬度控制在了220~260 HB。     

不同罩式退火工艺对Ti-IF钢组织和性能的影响

采用不同的罩式退火工艺进行了Ti-IF钢工业试制,对不同工艺的产品组织和性能进行了对比分析。根据试制结果,选取了方案1为Ti-IF钢罩式退火工艺。     

CAS-OB精炼工艺技术设计与应用

CAS-OB氧枪供氧强度及枪位控制,浸渍罩外形尺寸、插入钢液深度及浸渍罩位置,钢包底吹氩气压力、流量,钢包底吹氩孔的位置等设计参数的正确选择,影响着CAS-OB钢液成分和温度混匀速度、升温速度,以及合金收得率.结合实际工程,介绍了CAS-OB的设计和应用情况.     

转炉二次除尘新技术在改造项目中的应用

介绍了转炉二次除尘新技术的研发背景,结合宝钢二炼钢转炉除尘系统改造项目介绍了转炉二次除尘新技术在改造项目中的应用情况。从除尘风量的确定、集尘罩的形式、管路系统的布置以及转炉三次除尘等方面进行了具体分析,对比传统转炉二次除尘系统的不足,提出了转炉二次除尘新技术的优势,为大中型转炉二次除尘系统在线改造提供参考。     

顶吸罩在邢钢转炉二次除尘中的应用

正确选定顶吸罩类型是邢钢转炉二次除尘改造治理的关键。分析传统的二次收集罩的缺陷 ,论证了采用顶吸罩的合理性。邢钢现场试验数据证明 ,这一除尘方案是成功的。     

本钢6号高炉出铁场除尘系统的改进

介绍了本钢6号高炉出铁场的除尘参数、除尘系统及设备的特点.结合6号高炉除尘系统在实际运行中存在的问题,根据现场实际需要对铁场主铁沟上方移动罩的结构形式、除尘系统各吸尘点阀门的控制方式、除尘卸灰和输灰循环PLC控制系统进行试验改进,改善了出铁场除尘系统除尘效果.     

高压变频调速技术在转炉除尘风机上的研究与应用

莱钢炼钢厂将高压变频调速技术应用于1^#转炉除尘风机,经合理设计方案,实现了除尘风机随转炉冶炼周期自动合理调速,减少了设备故障。该系统安全可靠,操作简单,节电率达60%,年节电效益达83.16万元。     

石灰窑窑顶除尘系统改造设计

文章介绍了某厂气烧石灰窑窑顶除尘系统成功改造实例,从理论上分析了窑顶除尘罩设计计算方法,并指出了低压脉冲布袋除尘器在该系统应用中应该注意的问题。     

贾庵子8m2球团竖炉除尘系统的设计

介绍了贾奄子8m^2竖炉除尘系统的设计，一年多的运行表明，该系统的粉尘排放符合国家标准，除尘效率达到97.64%。     

本钢6号高炉出铁场除尘系统的应用与改进

针对本钢2600 m3高炉炼铁生产过程中产生大量的一次、二次烟尘超标,主沟移动罩使用寿命低的问题,在出铁场设置较为完善的通风除尘设施,通过出铁场屋顶自然排放的净化后气体含尘浓度小于100 mg/m3,实现了达标排放。通过对铁场主铁沟上方移动罩的结构形式,耐火材料的优化,使得新移动罩的使用寿命提高了4倍,集尘效率显著提高。     

Microwave Technology for Treatment of Fume Hood Exhaust

CHA Corporation installed a fume hood adsorber (scrubber) unit onto an operating fume hood and microwave regeneration system in the Safety and Risk Management Building at the Advanced Technology Park in Bozeman, Montana. The microwave-based fume hood exhaust purification process is designed to capture hazardous air pollutants in the fume hood exhaust using granular activated carbon (GAC) and natural zeolite, and subsequently either recover or destroy desorbed pollutants by microwave energy during regeneration of the saturated adsorbents. Onsite testing of this prototype microwave system was conducted using a variety of air borne pollutants including toluene, ethyl acetate, methylene chloride and hydrochloric acid. Test results showed that microwave energy, at a frequency of 2,450 MHz, restored the original adsorption capacity of saturated GAC and saturated natural zeolite. The results also demonstrated that microwave-induced catalytic oxidation was capable of providing oxidation efficiencies greater than 99% with oxidation temperatures below 100°C.     

Latest developments for dry and wet dedusting systems for converter steel making

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.     

对高炉铁口区除尘的思考

铁口区是高炉→转炉流程钢铁厂的除尘难点之一，铁口区烟尘近一半属于可吸入颗粒物。我国多数钢铁厂位于大、中城市附近，随着环保要求日趋严格，高炉铁口区除尘将从难点问题变为热点问题。现有铁口区除尘方式（主要是二次除尘）不同程序地存在着投资及运行费用高、除尘效果差、妨碍炉前操作等缺点。铁口区除尘的关键在于二次烟尘捕集，出路在于开发出系统风量小、对炉前操作无影响、除尘效果好、投资及运行费用低的烟尘捕集系统。三段式吹吸结合二次烟尘捕集方案具有上述特点，有望实现经济的铁口区除尘。