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大型顶吹平炉投产以来,由于降碳速度快,因而造渣困难,脱硫能力差,长期不能冶炼硅钢。针对上述问题,对造渣工艺进行改革,获得成功,不仅降低了消耗,提高了质量,缩短了熔炼时间,而且也满足了用户对硅钢的要求,同时,取得了较大的经济效益。 相似文献
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孙秀显 《冶金设备管理与维修》1998,(6):28-29
通过大量的调查研究,查清了电磁站内渗漏水的缺陷,提出了解决方案和具体操作方法,改变了原定的搬迁方案,不仅彻底地消除了缺陷,还节约了大修费,缩短了工期,为生产创了可观的效益。 相似文献
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热电厂煤气加压站经过系统优化改造后,设备运行可靠,操作方便,满足了生产工艺要求,实现了变频调速,消除了煤气的泄漏现象,达到了节电,节油,节约维修费用的目的,经济效益可观。 相似文献
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承钢“八五”期间坚持“科技是第一生产力”的思想,紧紧依靠技术进步,狠抓节能降耗,增产增收,投资7亿余元用于科技进步的项目,实现了高炉喷吹煤粉,连铸,连轧,热电联产等工艺技术并已取得了显著的经济效益,经济技术指标水平明显提高,有力地促进了企业的发展,提高了市场竞争的能力,保证了经济效益的提高,为“九五”的进一步发展奠定了基础。 相似文献
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本文叙述了国内先进的煤气净化工艺和氨、硫回收装置,净化了焦炉煤气,减少了环境污染,改善了硫铵质量,增加了硫磺新产品,提高了生产管理水平,确保了安全生产。 相似文献
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铝-钪(2%)合金的制备 总被引:4,自引:0,他引:4
传统的生产铝钪合金的方法,成本高,条件复杂,不利于工业生产,我们对金属热还原制取A1—Sc合金进行了研究,简化了生产条件,降低了对原料的要求,缩短了工艺流程,降低了生产铝钪合金的成本,开拓了铝钪合金的应用市场。 相似文献
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FeAl合金研究进展与发展方向 总被引:2,自引:0,他引:2
综述了FeAl合金的物理、力学性质,分析了造成合金延性低的主要原因——环境氢脆的产生原因和影响因素,概述了合金的加工方法和合金设计原则,最后指出了FeAl合金以后的研究重点和发展方向。 相似文献
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高冰镍浸出机理及工艺研究 总被引:3,自引:0,他引:3
研究了高冰镍和软锰矿在硫酸中的常压浸出过程 ,查明了影响浸出速率和浸出效率的因素 ,阐明了软锰矿、二氧化锰和高冰镍中镍硫化物的溶解机理 ,探讨了浸出过程中β -NiS的生成机理 ,提出了强化浸出的措施 ,进行了浸出正交试验 ,获得了浸出控制的最佳工艺条件 相似文献
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Xiu-Min Chen Bin Yang Dong-Ping Tao Yong-Nian Dai 《Metallurgical and Materials Transactions B》2010,41(1):137-145
The surface disproportionation reaction mechanism of aluminum subchloride on aluminum (110) surfaces has been investigated
using the plane-wave density functional theory (DFT). Three possible reaction mechanisms of AlCl disproportionation reaction
on aluminum (110) surfaces have been taken into account; the reactants and products structures have been optimized, transition
states have been confirmed, and activation energy has been calculated. The adsorption energy of reactants and the desorption
energy of products also have been calculated. All of these calculations have been employed to confirm the reaction mechanism
and the rate-determining step of AlCl disproportionation reaction on aluminum (110) surfaces. 相似文献
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Tantalate-columbate concentrate has been studied; namely, its chemical, phase, and granulometric compositions and radioactivity have been investigated. The thermodynamics of reactions of chlorination of the components of the concentrate have been calculated in the temperature range of 400–1273 K. A technique of laboratory chlorination has been developed and experiments have been performed at T = 750 and 800°C. The products obtained have been analyzed. The total degree of chlorination of the concentrate, as well as of tantalum and niobium, has been determined at various temperatures. 相似文献
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Prior research has shown that young refugees may be especially traumatised. The study includes 123 young Bosnian refugees, living at two Bosnian boarding-schools in Denmark who were given a revised version of the Harvard Trauma Questionnaire (HTQ). The subjects themselves have on average experienced seven traumatic events, and have either witnessed or had a family member experience an additional six events. Three-quarters have been shot at, have lost their homes and private possession and have been exposed to violence in the form of harassment or humiliation. Two-thirds have lost friends. Three-fifths have lived with uncertainty as to whether friends and family were alive or dead. More than half have seen dead and wounded people, have had their lives threatened and have thought that they would die. More than a third have lost close family members, have been wounded and have had their homes destroyed. Just under a third have been exposed to physical violence or have witnessed somebody being killed. A quarter have starved and been ill without being able to receive treatment. About a fifth have experienced captivity, torture and forced labour. 6% have been raped or exposed to other forms of sexual abuse. It is concluded that the young Bosnians examined are a multitraumatised group. Use of the HTQ increased the number of traumatic events quite considerably compared to the case notes. 相似文献
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建立了保温设备内钢锭热过程的数学模型,经实测验证,数学模型可用。举例计算并分析了保温设备对钢锭的保温和节能效果,探索了高温液芯钢锭装保温设备均热后直送初轧机轧制的可能性,讨论了保温设备的砌筑材料和壁厚对节能效果的影响。 相似文献