天铁圆坯连铸机工艺改进实践

针对天铁圆坯连铸机在生产过程中出现的水口结瘤、开浇失败、漏钢、塞棒失控及水口穿钢等影响圆坯作业率的问题,对其原因进行了分析。通过净化钢水减少Al2O3夹杂,加强水口、中包烘烤的检查,规范塞棒起步操作及稳定结晶器钢水液面,选用合适保护渣,保证结晶器内稳定传热等措施,使铸机的生产率大幅提升,实现了全月无非正常停浇,单流断流由6.27%降低到1.96%,全月平均连浇炉数达到22.4炉,实现了稳定生产。     

结晶器漏钢预报系统

对连铸机结晶器漏钢预报系统的控制原理、功能、结构进行了说明,该计提高连铸机作业率具有重要意义 。     

结晶器漏钢预报系统

对连铸机结晶器漏钢预报系统的控制原理,功能,结构进行了说明,该系统对提高连铸机作业率具有重要意义。     

大板坯连铸机粘结漏钢的原因分析及预防

漏钢是对连铸机损害最大的恶性生产事故，漏钢不仅造成生产中断，铸机作业率下降，更为严重的是损坏设备。对济钢大板坯连铸机出现的粘结漏钢进行了分析，并提出相应的改进和预防措施，取得了良好效果。     

衡阳钢管厂水平连铸机调查分析

对衡阳钢管厂水平连铸机单机实际作业率、水平连铸机事故次数及损失、以及直接影响连铸机正常拉坯的事故分类进行了统计计算，并据此进行了研究分析，最后根据分析结果提出了应对措施。     

济钢大板坯连铸机漏钢的控制

为了减少大板坯连铸机漏钢、提高铸机的作业率,济钢第三炼钢厂连铸车间通过采用结晶器专家系统、提高钢水质量、提高设备精度、改进操作工艺等措施,使漏钢率大大降低。     

衡阳钢管厂水平连铸机调整分析

对衡阳钢管厂水平连铸机单机实际作业率、水平连铸机事故次数及损失、以及直接影响连铸机正常拉坯的事故分类进行了统计计算，并据此进行了研究分析，最后根据分析结果提出了应对措施。     

韶钢连铸机迅速达产的启示

1.概况 1.1 设计特征 全国产化的二机二流R6m新型小方坯连铸机,是根据韶关钢铁厂提出的工艺要求,结合了国外近年有关小方坯连铸机的先进技术和我国自己的连铸技术,开发研制的具有我国特色的第一台R6m新型小方坯连铸机,为我国连铸机增加了一个新品种。图为连铸机正在工作。 这套连铸机保持了目前国内外小方坯连铸机的若干优点,如:各流单独控制,操作灵活,流间距较小,布置合理;部件可快速整体更换,离线检修,可提高铸机作业率;采用钢水罐回转台,可快速更换钢罐,有利连浇,漏钢时也易于处理;摆式飞剪动作快,金属损耗少;有较完整的检测控制系统,联锁、监视信号、越限报警控制等较齐     

莱钢3#连铸机引锭棒及相关拉钢工艺的研究与改造

对莱钢 3 #方坯连铸机的引锭棒及相关拉钢工艺进行了理论研究 ,计算出引锭棒的直径及冷料加入量 ,并对引锭棒及相关拉钢工艺进行了改造 ,年创经济效益 3 2 .5万元     

技术信息

·国内·安钢引进的德马克型连铸机在国内帅先达产 IMPORTED DEMAG TYPE BILLET CASTER REALIZED RATED CAPACITY AT ANSHAN IRON AND STEEL CO. 安阳钢铁公司对引进的R5.25 m三机三流120×120 mm德马克型连铸机原设计中存在的问题进行技术改造,使漏钢事故尤其是角裂漏钢事故大大降低,提高了连铸机作业率,实现了连铸机达产,创全国同机型的前列。改造前,R5.25 m三机三流德马克连铸机设计     

冷筛结构优化改造

安钢1号烧结机4号冷筛存在结构设计不合理、筛板磨损快、振动器润滑不足等问题,作业率较低.通过优化改造,设备作业率达到96％以上.     

艾萨熔炼技术在云铜的实践

叙述了艾萨熔炼技术在云铜的应用实践及成功运行的经验。详细介绍了云铜艾萨炉在处理能力、作业率、耐火材料寿命、烟尘率、喷枪使用寿命等方面取得的进步。     

艾萨熔炼技术在云铜的实践

叙述了艾萨熔炼技术在云铜的应用实践及成功运行的经验。详细介绍了云铜艾萨炉在处理能力、作业率、耐火材料寿命、烟尘率、喷枪使用寿命等方面取得的进步。     

Approach for Minimizing Operating Blast Furnace Carbon Rate Using Carbon-Direct Reduction (C-DRR) Diagram

An approach for reducing input carbon rate of a blast furnace using carbon-direct reduction (C-DRR) diagram has been developed. The role of shaft efficiency, blast input conditions, and heat loss rate in reducing the carbon rate has been brought out. A two-zone thermochemical model has been used to develop C-DRR diagrams for analyzing operating data of a furnace as well as predicting conditions for reducing its carbon rate. The model can be integrated with the control system of a blast furnace for driving an operating furnace to reduce carbon rates.     

不同富矿配比下钒钛磁铁精矿烧结制度的探讨

本文针对现场生产的实际需要，对钒钛磁铁精矿配加富矿粉烧结工艺进行了深入的试验探讨，寻求了不同富矿配比条件下的最佳烧结因素组合，以及其它主要中间操作指标对烧结过程的影响及程度，在攀钢现有的生产条件下，配加富矿不超过１６％时，采用优化后的操作参数能取得理想的生产效果。     

Estimation of Energy Consumption in COREX Process Using a Modified Rist Operating Diagram

Fuel consumption in the COREX-3000 process run in Baosteel is currently higher than the design index.Therefore,mass and heat balance equations for the COREX process were established using the basic principles included in the Rist operating diagram for blast furnace(BF)as a reference.Thermodynamic calculations were then used to modify the Rist operating diagram so that it was suitable for the COREX process.The modified Rist operating diagram was then applied for the evaluation of metallization rate(MR)and fuel structure to reduce the energy consumption in the COREX process.The modified Rist operating diagram for the shaft furnace(SF)provided a nearly ideal value for the restriction point W when the metallization rate was increased,while the point Pon the operating line for the melter gasifier(MG)moved upward due to reduction in the heat required in hearth.The feasibility of reducing the energy consumption during the COREX process by changing the fuel structure was also demonstrated.     

6t氧气顶吹转炉的扩容改造

济钢第二炼钢厂针对原转炉系统存在的系统不匹配、作业率低等问题，对６ｔ氧气顶吹转炉进行了扩容改造，改进了倾动系统、冷却系统、上料系统，使炉前作业率提高了５％，具备了年产５０万ｔ钢的生产能力。     

提高攀钢钒360 m 2 烧结机产质量的实践

介绍了攀钢钒炼铁厂360 m2烧结机自投产以来,通过采取一系列的攻关措施,如解决设备问题,提高烧结 机作业率;工艺改进、烧结强化,提高烧结机利用系数;强化生产操作,提高烧结矿质量;实现了烧结矿产质量的提 高。2010年利用系数为1.415 t/（m 2 ·h）、作业率为96.52%、转鼓强度为73.27%,固体燃耗为45.27 kg/t,2011 年1-6月平均利用系数为1.425 t/（m 2 ·h）、作业率为97.39%、转鼓强度为73.61%,固体燃耗为47.96 kg/t。     

蜂窝体结构参数与操作参数优化研究的数值模拟

通过数值模拟的方式,建立了蜂窝体蓄热室内流动与换热的三维非稳态数学模型,根据蓄热室内速度、温度、压力的不同,研究其温度效率、热回收率和压力损失的变化规律,在保证蓄热量的前提下,找到不同结构蓄热室的最佳操作参数的方法,并且根据温度效率曲线找到了结构参数和操作参数相匹配的最佳值区间。     

Results of peripheral endovascular procedures in the operating room

PURPOSE: This study presents the results of closed (percutaneous) and open endovascular procedures performed exclusively by vascular surgeons in the operating room and compares them with results from combined series from the literature, including primarily closed procedures in radiology or cardiology facilities. METHODS: Retrospective review of 607 consecutive peripheral arterial and venous angioplasties, stents, thrombolytic cases, and inferior vena caval filters in 446 patients was analyzed for immediate success rate, complication rate, and 1-year life table patency rate. RESULTS: The incidence of initial technical success was: aorta, 89%; iliac artery, 91%; superficial femoral artery, 90%; popliteal artery, 91%; tibial arteries, 79%; arm arteries and veins, 86%; renal arteries, 100%; IVC filters, 98%; and iliofemoral veins, 100%. The 1-year primary patency rates, including technical failures, were 70.3% in 113 femoropopliteal procedures and 83.7% in 194 iliac arteries. Advantages to the use of the operating room included: (1) simultaneous angioplasty during a bypass operation for abnormalities proximal or distal to the graft, (2) correction of lesions first discovered during thrombectomy, and (3) optimum patient monitoring and sedation in the operating room. CONCLUSIONS: Endovascular procedures performed by vascular surgeons in the operating room lead to results comparable with procedures performed in nonsurgical interventional suites, and the use of the operating room has advantages.