连铸机结晶器液位控制系统数学模型及其仿真

连铸机结晶器液位控制系统的数学模型对于液位控制起着重要的作用.本文基于滑动水口的伯努利方程得到系统传递函数,建立整个系统的数学模型,并经仿真证明该数学模型对于保证连铸机结晶器液位高度控制是很有效的.     

结晶器液位检测及控制的现状和发展方向

对连铸机结晶器液位控制系统进行了详细的论述和分析，主要对现有结晶器液位系统的不同建模、参数辨识、液位检测以及控制策略进行了比较研究，指出了存在的问题和今后的研究方向。     

结晶器钢水液位—拉速自动控制装置

采用热电偶方法检测结晶器钢水液面位置并实现其自动控制而研制的“结晶器钢水液位——拉速自动控制装置”,是对连续铸钢自动化工作的一种新尝试。本文对该装置各部件单机仪表及系统的工作原理、结构特点、技术性能、安装调试和使用操作等方面都作了较为全面介绍,可供探索结晶器铜水液位检测和控制的借鉴与参考。     

方坯连铸机计算机控制系统

结合计算机控制系统在唐钢二钢轧厂3^#小方坯连铸机改造工程中的应用,对方坯连铸机计算机控制系统的构成、特点及应用进行了分析和研究。同时对方坯连铸机结晶器振动控制、结晶器钢水液位控制、电磁塞棒线性位移控制进行了原理分析和探讨。     

宝钢电炉连铸机结晶器液位控制影响因素分析

结晶器液位控制精度对于连铸机生产与铸坯质量的稳定具有十分重要的影响。概述了宝钢电炉连铸机两种结晶器液位自动控制方式。在对浇铸全过程数据采集的基础上 ,建立了衡量液位波动程度的四个统计指标 ,就一些设备与工艺操作因素对于液位控制的影响进行了定量分析     

一种鲁棒预测控制方法及其在连铸中的应用

针对连铸机结晶器液位控制系统中一些常用控制方法无法克服由拉速剧烈变化或其它扰动构成的有色噪声的影响这一实际问题，在已有模型的基础上建立了一种包含有色噪声的更为简单实用的模型，同时将基于此模型的一种能克服有色噪声扰动的广义预测控制方法用于结晶器液位控制。实验结果表明，采用该方法后结晶器液位偏差较小，系统鲁棒性大大改善。     

薄板坯连铸低碳铝镇静钢结晶器液位波动的控制

针对薄板坯连铸低碳铝镇静钢结晶器液位波动的问题,从现场操作、工艺优化、设备维护等方面对造成液位波动的原因及影响因素进行了分析。在此基础上采取了相应的措施,使浇铸过程中结晶器液位波动到了很好的控制,满足了生产需求。     

小方坯连铸中液位控制系统的应用

液位自动控制系统对于连铸提高钢坯质量,减少漏钢、溢钢等事故,稳定生产以及节能降耗都具有重要意义.本文系统介绍了小方坯连铸中结晶器液位自动控制系统的构成、功能、工作原理以及自动开浇的工艺流程以及控制过程.     

连铸结晶器钢水液位控制系统分析

为了获得高品质钢，连铸生产中应精确控制结晶器钢水液位。一种先进的组合式结晶器钢水液位控制系统(包括一个PID基本控制器和若干功能模块)用以有效控制生产过程中的变化和干扰，与过去传统的结晶器钢水液位控制系统相比，其能更有效地控制结晶器钢水液位。     

唐钢薄板坯连铸结晶器液位波动原因

结合唐山钢铁股份有限公司FTSC薄板坯连铸机生产实际情况,对导致薄板坯连铸结晶器液位波动的原因进行了分析.结果表明,液位检测系统的零点漂移、二次冷却效果和扇形段对中精度等因素均对结晶器液位稳定性有显著的影响.     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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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.