100t 电弧炉 Cojet集束氧枪的应用

安阳钢铁公司100 t电弧炉在复产改造中采用炉壁Cojet集束氧枪替代原有的炉壁氧燃烧嘴。100 t电弧炉改造复产后,炉料为80 t废钢+30 t生铁时,EAF冶炼周期55 min,电耗360 kWh/t,电极消耗1.6 kg/t;当炉料为60%废钢+40%铁水时,EAF冶炼周期50 min,电耗225 kWh/t,电极消耗1.2 kg/t,实现电弧炉低成本高效化运行。     

70 t电弧炉应用热压块HBI冶炼的工艺实践

70 t电弧炉的炉料装入量为80～81 t,其中热直接还原铁热压块HBI为14.6～15.2 t,铁水23～27 t,其出钢量77～78 t,电耗316～324 kWh/t,氧耗29.7～33.0 m~3/t,冶炼周期48～54 min。生产实践表明,热压块是优质废钢的替代品,可促进电弧炉脱磷和脱碳反应,降低氧耗1.3～3.2 m³/t,但每增加1%热压块则增加电耗3.5kWh/t,所以炉料为全废钢时不宜配加热压块,当加入30%铁水和加入10%热压块时可以达到冶炼过程最优化。     

20t电弧炉冶炼工艺优化

针对莱钢特钢厂20t电弧炉冶炼过程中存在的挂料现象、冶炼周期长、电耗高、氧气利用率低、炉衬渣线侵蚀严重、炉衬寿命低等问题,采取了优化入炉废钢结构、铁水热装、优化供电制度、泡沫渣埋弧操作、炉门氧枪供氧技术、油氧助熔技术和炉衬喷补等技术,使20t电弧炉冶炼周期缩短26min,变压器利用系数提高41.51%,炉体寿命提高286炉次,保证了连铸的顺行。     

120 t转炉高效化冶炼工艺研究

针对中天钢铁第三炼钢厂120 t转炉冶炼过程中存在吹氧时间长、后处理工序多且时间长的问题实施了一系列的改进措施。通过提高转炉废钢比并增大供氧强度,转炉吹氧时间由15.0 min降低到13.5 min以内,缩短吹氧时间1.5 min以上;转炉终点采用不倒炉出钢并优化溅渣工艺缩短溅渣时间,缩短冶炼周期2～3 min;此外,通过补炉料的更新、大出钢口的应用等,缩短转炉冶炼周期1 min以上。工艺改进后,转炉总冶炼周期由39.0 min降低到34.3 min。     

70 t 高阻抗超高功率电弧炉的工艺实践

攀成钢70 t高阻抗超高功率偏心底电弧炉的炉料为20%铁水+80%生铁-废钢。在电弧炉的炉壁上安有3支RCB集束喷枪装置和炉门两侧墙上安有两处喷碳粉枪。冶炼实践表明,吹氧脱碳速度达0.08%～0.012%C/min,冶炼电耗为310.86 kWh/t钢,电极消耗1.67 kg/t钢,氧气消耗46.7 m³/t钢,冶炼周期56 min。     

兴澄钢铁公司100 t直流EBT电弧炉高效生产实践

兴澄特钢100t直流。EBT电弧炉于1997年11月投产，变压器额定容量90MVA，年设计生产能力68万t，主要生产轴承钢，齿轮钢，高压锅炉管用钢，油井管用钢。2001年10月于电弧炉炉壁安装3套ACI PyreJet集束氧枪和2套PyrOx氧燃烧嘴，使冶炼通电时间由51min降至42min，冶炼周期由59min降至49min，电耗由327kWh／t降至281kWh／t，氧耗为52m^3／t。2002年10月采用40％～50％铁水热装工艺，通电时间进一步降至36min，冶炼周期44min，电耗177kWh／t，氧耗增至56m^3／t，年产量达110万t。     

淮钢70 t电弧炉PTI JetBOx系统的应用

淮钢70t电弧炉安装3套阿JetBOx集束射流氧枪系统后，冶炼周期降低3—5min，电耗降低25—40kWh／t，电极消耗降低0．4kg/t。     

安钢100 t交流竖式电弧炉控制冶炼周期的工艺实践

安阳钢铁公司100 t交流竖式电弧炉于1999年11月投产,其变压器容量为60~72 MVA。冶炼时兑33%左右的铁水,竖炉预热废钢的温度达400~600℃,并采用氧油烧嘴和水冷碳氧枪操作和圆心炉底出钢(出钢量110 t)等操作技术使电弧炉电耗降至220 kWh/t,电弧炉作业率达92%,冶炼周期平均为41 min,年产钢量超过100万t,显著降低了生产成本。     

电弧炉炼钢中碳氧二次燃烧的影响因素和应用

电弧炉炼钢时，废气与熔池和渣子接触，CO气体的温度接近钢水温度，整个过程基本由反应动力学条件控制，凭借吹氧可以在熔池上方进行二次燃烧。1台60t电弧炉2000多炉的二次燃烧的应用结果表明，当吹入氧气操作得当，二次燃烧对水冷炉壁、炉顶、电极寿命、3角区耐火材料寿命、金属烧损率均无影响，氧耗增加7．93m^3/t，电耗降低38kWh/t，冶炼周期可稳定缩短4min。     

100 t交流竖式电弧炉冶炼电耗技术分析

对影响电弧炉冶炼电耗的主要因素进行了理论分析,降低电弧炉冶炼电耗的基本途径是缩短冶炼周期.开发了改性生铁在电弧炉中的应用技术;优化了供电曲线,使有功功率超过变压器额定功率的80%;在100t交流竖式电弧炉应用冶炼周期综合控制理论,使得电弧炉冶炼周期平均为41 min,生产率超过每吨炉容量每年1万t,冶炼电耗平均为222 kW·h/t.     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

Journal of Rare Earths Contents List of Vol.32(2014)

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Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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