转炉炼钢终点控制技术研究及应用

炼钢终点控制是转炉吹炼末期的重要操作,一一概述了转炉炼钢终点控制技术的发展以及人工经验控制、静态控制、动态控制以及自动控制等不同类型的终点控制方法,并对各个类型终点控制技术的特点进行了对比。     

基于卡方分箱法和逻辑回归算法的 转炉操作工艺评价模型

终点碳含量和温度的窄窗口控制是衡量转炉冶炼水平和实现智能制造的主要目标.本文基于某钢厂Q235钢种转炉实际生产数据,采用卡方分箱法并结合所划定的理想终点目标区间对转炉操作工艺参数进行了分箱,借助WOE编码判别确定了影响转炉理想终点目标的关键工艺参数,采用逻辑回归算法对编码后数据进行了评分.所构建的转炉操作工艺评价模型能够对操作工艺参数进行合理评分,所判别不符合转炉理想终点目标区间的数据召回率为84%、精准率为88%.此外,评价结果表明铁水碳含量及硅含量是影响该炼钢厂转炉终点目标的主要因素,因此,优化铁水条件有利于实现对转炉终点目标窄窗口控制之目的.     

试论提高转炉炼钢终点命中率的控制措施

简要介绍了转炉炼钢终点命中率的控制技术,从碳氧含量、出钢温度和脱磷条件三个方面详细分析了转炉炼钢终点命中率的影响因素,提出通过完善留渣操作、降低出钢温度、控制吹炼强度和进行补热升温等针对性的控制策略,提高转炉炼钢终点命中率,以期为转炉炼钢终点命中率提高及控制提供参考,确保转炉炼钢稳定作业,提高转炉炼钢生产质量和效率。     

重轨钢转炉炼钢工艺的研究

攀钢生产重轨钢采用增碳法炼钢工艺,增碳法工艺简化了转炉操作,终点控制精确。通过优化吹炼和终点参数控制,以提高重轨钢的质量和缩短转炉冶炼周期。     

转炉终点控制技术

终点控制是转炉吹炼末期的重要操作，通常总是尽可能提前让磷、硫去除到终点所要求的范围，故终点控制便简要为终碳控制和钢水温度控制。转炉吹炼终点控制，可分为自动控制和经验控制两大类。自20世纪60年代开始，国外逐步采用计算机对转炉吹炼进行控制，70年代从静态控制向动态控制发展。国内除宝钢、首钢等少数转炉采用动态控制外，     

转炉炼钢终点控制模型的方法研究

转炉炼钢终点控制一直是转炉控制问题的难点之一。分析了转炉炼钢终点控制技术的主要发展阶段,比较了典型的转炉炼钢终点静态控制模型,探讨了目前广泛使用的动态控制技术,并指出我国转炉终点控制水平还有待加强提高。     

烟气分析智能系统在转炉冶炼中的应用

为提升企业智能化水平,莱钢炼钢厂在4~#60 t转炉投用烟气分析智能系统,系统主要由发射单元、接收单元和吹扫单元构成。生产实践中通过入炉原料精准化控制,建立转炉操作静态模型,优化转炉终点控制,转炉终点碳温控制精度大幅提高,铸坯质量得到本质化稳定,取得了显著经济效益。     

低磷钢半钢炼钢过程中控磷工艺研究

介绍了转炉炼钢脱磷反应的条件、半钢炼钢深脱磷工艺的要求。通过分析转炉脱磷反应的冶金条件,优化炉渣碱度、熔池搅拌强度、出钢温度等工艺参数,研究了半钢炼钢过程中三种低磷钢的控磷生产工艺,为转炉脱磷操作创造有利条件。采用单渣法操作,石灰加入量控制在26~50 kg/t,终点[P]控制在0.025%以内,终点[P]一次合格比例达到99.6%;采用双渣法操作,石灰加入量控制在50~70 kg/t,终点[P]控制在0.015%以内,终点[P]一次合格比例达到98.4%;采用脱磷-脱碳双联工艺,终点[P]控制在0.010%以内,终点[P]一次合格比例达到97.6%,为冶炼不同钢种的控磷操作提供了参考。     

两种转炉炼钢终点控制模型的比较

分析了转炉炼钢静态控制与动态控制模型的方法、作用及功能关系。针对中小型炼钢转炉检测设备受限制的现状,从建模原理、方法特点和应用效果方面对建立的基于遗传算法-神经网络混合算法(CA-BP)的转炉炼钢终点优化控制静态模型和转炉炼钢终点预测的准动态控制模型进行了比较,认为混合算法可以提高静态模型的预测效果,而准动态模型可以反映转炉冶炼的动态操作和加料过程对一次倒炉时间和终点的影响。     

120 t转炉降低钢铁料消耗实践

通过对影响转炉钢铁料消耗的主要原因进行分析,发现入炉原料T[Fe]含量低、转炉工艺控制以及冶炼操作不当引发溢渣喷溅、冶炼终点过吹且终渣量大是导致转炉钢铁料消耗高的主要原因。针对以上原因从入炉原料优化、改进工艺控制和冶炼操作、稳定冶炼终点温度成分等方面制定控制措施,有效改善了转炉冶炼钢铁料消耗经济技术指标。自2021年下半年以来,阳春新钢铁2座120 t转炉平均钢铁料消耗均控制在1 060 kg/t以下。     

China's Major Non-ferrous Metals Imports & Exports

正~~     

Zinc Production by Province in 2014

正~~     

80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.