煤和塑料混熔喷吹技术研究

概述了国外高炉喷吹废塑料技术现状和国内研究进展,提出了煤与废塑料混熔高炉喷吹新工艺.对不同比例的废塑料与煤粉混合,在200 ℃的混熔温度下制成样品进行燃烧特性试验.结果表明:混熔样品具有良好的燃烧性能,开始燃烧温度和激烈燃烧温度都比煤粉低,塑料的存在对煤有提前燃烧作用,废塑料混熔比例在25%时燃烧时间较煤粉短,燃烧速度快;废塑料与煤混熔对高炉喷吹技术,理论上是可行的.     

高炉喷吹废塑料与喷吹煤粉比较分析

从工艺流程、原料化处理工艺及在高炉中能量利用三方面对高炉喷吹煤粉和废塑料进行比较分析可以看出,高炉喷吹废塑料和高炉喷吹煤粉一样可以作为高炉辅助喷吹燃料技术,高炉喷吹废塑料不仅为高炉炼铁提供了燃料,更能解决废塑料造成的环境污染问题,是兼顾社会效益、环境效益和生产效益的综合利用技术。     

废塑料入炉喷吹的数值模拟研究

基于高炉喷吹混合燃料的方法,探究废塑料作为燃料在高炉内的作用。以某2536m3高炉为研究对象,将喷入的煤粉及塑料作为粉相,分析混合燃料的水分、灰分、挥发分和固定碳等化学指标,采用高炉高温区热平衡分析法,计算高炉单一喷吹和混合喷吹条件下的焦比,对高炉内喷吹过程进行模拟研究。计算机模拟结果表明,将煤粉与废塑料混合喷吹降低了高炉焦比,提高了煤的利用率。     

高炉喷吹煤和废塑料混合燃料的可行性研究

分析了高炉喷吹混合燃料的可磨性、黏结指数和胶质层厚度等对高炉冶炼的影响,并对高炉喷吹煤粉、喷吹煤粉与废塑料混合燃料进行了燃烧模拟。结果表明,高炉喷吹煤与废塑料混合燃料在理论上是可行的。     

高炉喷吹技术进展

介绍了高炉喷吹煤粉、高炉喷吹喷焦粉、高炉喷吹焦炉煤气以及高炉喷吹废塑料四种较为常见的高炉喷吹技术。     

高炉喷吹煤和废塑料混合燃料燃烧过程的数值模拟

采用数学模型预测高炉喷吹煤与废塑料混合燃料在直吹管的燃烧过程,数学模型包括气相流动、混合燃料的燃烧、辐射传热等子模型.模拟结果表明,燃料总的燃烧效率能达到90%以上,高炉喷吹煤与废塑料混合燃料在高炉的燃烧行为介于高炉单独喷吹煤粉和废塑料两者之间,高炉喷吹煤与废塑料混合燃料在理论上是切实可行的.     

高炉中喷吹废塑料的可行性研究（Ⅰ）：——废塑料与煤粉的燃烧特性对比研究

为了研究向高炉中喷吹废塑料的可行性,对几种常见废塑料与高炉喷吹用煤粉的燃烧特性进行了对比研究。结果表明：废塑料具有良好的燃烧性能;废塑料的开始燃烧温度和激烈燃烧温度都比煤粉低,燃烧时间较煤粉短,燃烧速度快,燃烧灰尽少,因此更有利于高炉喷吹。     

高炉中喷吹废塑料的可行性研究（Ⅱ）——废塑料与煤粉的热特性对比研究

为了研究向高炉中喷吹废塑料的可行性,对几种常见废塑料与高炉喷吹用煤粉在升温过程的热行为进行了对比研究。结果表明：与煤相比,废塑料热值高,从着火到燃烧结束所需时间短,且占整个升温过程耗时比例低。从而表明从热特性角度分析,废塑料适用于高炉喷吹。     

高炉新技术（一）——钢铁冶炼新技术讲座之二

高炉喷吹废塑料做为处理废弃塑料是一种新型的处理方法，其热利用效率高达80％，其中有50％作为还原剂被利用。而在焚烧炉中作为传热和发电时的利用率也只有30％-40％。因此，高炉喷吹废塑料既可以代替部分煤粉，又可以作为解决“白色污染”的投资少、效果好的新方法。     

日本炼铁中废塑料作为高炉原料的技术

JFE钢公司于1996年10月开始在京浜厂1号高炉对产业废塑料进行处理，是日本最早开始进行高炉喷吹废塑料的钢铁公司。从2000年4月开始，与《包装容器再生利用法》实施同时，日本高炉开始喷吹普通废塑料。高炉喷吹废塑料的工艺是，先把收集的废塑料进行破碎分解，分成薄膜类塑料和固形类塑料。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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