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薄板坯连铸保护渣的研制及使用 总被引:9,自引:1,他引:8
通过对保护渣理化性能、熔化特性的基础研究,确定了适合高拉速薄板坯连铸用保护渣的组成及成分范围。利用数值仿真建立的传热数学模型确定的保护渣熔化温度,粘度被实践证明是合理的,这为保护渣的研究提供了理论依据。通过工业性试验的应用证明所研制的保护渣系能满足薄板坯连铸的需要,使用效果良好,为我国高速连铸用保护渣的配制提供了方向。 相似文献
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通过热丝法得出保护渣连续冷却转变(CCT)和时间-温度转变(TTT)曲线,并用偏光显微分析和X-射线衍射分析方法研究了萤石含量(8%~16%)对碱度1.0的薄板坯连铸结晶器保护渣结晶性能的影响。结果表明,萤石含量每增加2%,保护渣的临界冷却速度平均增加2.5℃;同一冷却速度下,随保护渣中萤石含量的增加,结晶温度升高,结晶率增大,有利于提高界面热阻,控制渣膜传热,减少铸坯表面裂纹产生;因萤石含量超过14%时,渣膜中大量生成结晶矿物枪晶石,对连铸润滑要求较高的钢种,应控制萤石含量≤14%。 相似文献
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摘要:传统CaO-SiO2系保护渣在浇铸高锰高铝钢时,渣中SiO2易被钢中Al还原,造成保护渣成分改变和性能恶化,危害铸坯表面质量和连铸过程顺行。为了抑制钢 渣反应,旨在减少渣中氧化性组分的低反应性,CaO-Al2O3基渣系是重要选择方向。在评估高锰高铝钢凝固特性和传统反应性保护渣基础上,提出了低反应性保护渣基本性能要求,并采用单纯形法设计了CaO-Al2O3基保护渣系的试样组成。通过测试实验渣样的熔化特性和流动特性,获得了5组低反应性连铸保护渣熔化流动特性的成分控制区域。典型区域基本性能为:熔化温度(半球点温度)900~1100℃,1300℃的黏度0.1~0.2Pa·s,转折温度900~1150℃。 相似文献
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《钢铁研究学报》2020,(9)
传统CaO-SiO_2系保护渣在浇铸高锰高铝钢时,渣中SiO_2易被钢中Al还原,造成保护渣成分改变和性能恶化,危害铸坯表面质量和连铸过程顺行。为了抑制钢-渣反应,旨在减少渣中氧化性组分的低反应性,CaO-Al_2O_3基渣系是重要选择方向。在评估高锰高铝钢凝固特性和传统反应性保护渣基础上,提出了低反应性保护渣基本性能要求,并采用单纯形法设计了CaO-Al_2O_3基保护渣系的试样组成。通过测试实验渣样的熔化特性和流动特性,获得了5组低反应性连铸保护渣熔化流动特性的成分控制区域。典型区域基本性能为:熔化温度(半球点温度)900~1 100℃,1 300℃的黏度0.1~0.2 Pa·s,转折温度900~1 150℃。 相似文献
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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 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
<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 相似文献
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《Baosteel Technical Research》2014,8(4)
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 相似文献
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《China Nonferrous Metals Monthly》2014,(1):9-10
【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu... 相似文献
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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. 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
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 相似文献
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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 相似文献
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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 相似文献