共查询到20条相似文献,搜索用时 140 毫秒
1.
对碳套辊结瘤原因进行了原因分析,分析结果表明:碳套辊表面凹坑为结瘤提供了附着位置;粉尘、残油残铁、氧化铁皮等为碳套辊结瘤的主要原料;通过调整炉内气氛、监控清洗段电导率、刷辊电流等措施有效降低了碳套辊结瘤发生,通过差速法可快速锁定结瘤范围. 相似文献
2.
介绍新钢冷轧连续退火炉炉辊结瘤的形貌特点,对炉辊的粘附型结瘤、反应型结瘤的形成机理及产生原因进行分析,采取相应的控制措施后炉辊结瘤现象得到了有效控制. 相似文献
3.
4.
文章根据包钢改良森吉米尔热镀锌机组的特点及炉辊结瘤现象,分析了炉辊结瘤产生的原因,对有可能造成炉辊结瘤的所有工艺参数和相关设备进行了调整和优化,有效的控制了退火炉炉辊结瘤现象,并对炉辊结瘤产生的原因、处理及预防措施进行了相关的梳理。 相似文献
5.
6.
7.
8.
9.
10.
11.
12.
Carbon footprint is the mass of carbon formed in the full cycle of manufacturing one kind or another product. This carbon is included in greenhouse gases. During production of iron and steel are generated carbon monoxide and greenhouse gases: methane, and carbon dioxide. Methane and carbon monoxide burn to carbon dioxide by secondary energy resources. By this means, the carbon footprint by the production of iron and steel has determined by the weight of carbon dioxide formed in this production. As results of analysis of the processes of manufacture of iron and steel, it has revealed that the tandem of blast furnace with electric arc furnace is characterized by a lower value of integrated emissions of CO2 than the tandem of blast furnace with an oxygen converter. It was proposed to process of the cast iron made by one blast furnace, then in the oxygen converter, and, at last, in one or more electric arc furnaces. Moreover, the electric arc furnace is loaded by 30% of iron produced in blast furnace, and the remaining 70% are complemented by metal scrap. In the oxygen converter is loaded, the part of cast iron (75–85%), that remained after processing in the arc furnace. The converter is applied the metal scrap for full loading. Calculations of total emission of carbon dioxide for different triads of these units are made. Simultaneous use of oxygen converter with electric arc furnaces for cast iron smelting (obtained from one blast furnace) helps to reduce reliably the emission of carbon dioxide to 20% as it is follows from these calculations. This suggests that such a triad of used units conforms to green technology. Example of the use of mentioned triad is for a full load of the converter applied to metal scrap. The calculations total emissions of carbon dioxide for different triads of these units were performed. From these calculations it follows that the simultaneous use of oxygen converters after electric arc furnaces for smelting iron (obtained from one blast furnace), it helps to reduce the emission of carbon dioxide to 20%. This suggests that this triad of used units conforms to green technology. An example of using this triad is in the Magnitogorsk Iron and Steel Works, where along with the oxygen converter, electric arc furnaces with the use of locally produced electricity at burning fuel of secondary energy resources from units, in which the fuel is burnt. This practice can be recommended for a number of other metallurgical enterprises. 相似文献
13.
14.
15.
冷轧钢板退火碳黑缺陷的研究 总被引:4,自引:0,他引:4
探讨了冷轧钢板碳黑形成机理,制定出避免碳黑产生的具体方案和合理的吹氢工艺,采取的改进罩式退火炉生产设备,特别是保护罩内壁积碳的清除工艺,为国内冷轧厂首次试验成功,并在鞍钢冷轧厂退火过程中首次实施。 相似文献
16.
17.
中国钢铁生产主要以高能耗和高排放的高炉-转炉长流程为主,节能减排压力较大。因此,积极研发高炉低碳炼铁技术,促进高炉工序CO2减排尤为重要。铁焦是将含铁原料加入适宜的煤中,经焦化或炭化后成型的新型碳铁复合炉料,其高反应性可以显著降低热储备区温度、降低碳消耗,高炉使用适量的铁焦可实现一定程度的节能降碳。基于现场生产数据,采用㶲分析理论,建立高炉使用铁焦的㶲平衡模型,探索铁焦添加量对高炉物料消耗及能量利用效率的影响。结果表明,高炉使用铁焦后,炉内间接还原得到发展,碳利用率提高,炉内灰分量降低,冶炼单位生铁的碳素消耗和炉渣量均会降低,与未使用铁焦相比,高炉使用114 kg铁焦后,吨铁碳素消耗降低25.95 kg,渣量降低11.28 kg。此外,铁焦内部的金属铁仅需熔化,节省还原所需的㶲量,焦炭和鼓风带入㶲会显著降低,因此高炉冶炼吨铁消耗的总㶲量降低,同时,炉内传热也得到改善,内部㶲损失有效降低,与未使用铁焦相比,高炉使用114 kg/t铁焦后,目的㶲效率由46.14%提高至48.87%,热力学完善度由87.46%提高到88.02%。在此条件下,高炉吨铁的内部㶲损失降低192.63 MJ,实现节能6.57 kg(标煤)。 相似文献
18.
高炉使用含碳复合炉料的原理 总被引:2,自引:1,他引:1
高炉炼铁正朝着高产、低污染、低能耗的方向发展,为了实现这一目标,包括高炉使用含碳复合炉料等一些革新的炼铁技术已经被提出或实际应用。铁焦、热压含碳球团是将铁矿粉和煤粉按一定比例混合后制成的新型含碳复合炉料。研究结果指出,含碳复合炉料相比于传统的高炉炉料(烧结矿和球团矿)具有高温强度高、还原性能好以及原料适应性强等优势。阐明了高炉使用含碳复合炉料的基本原理,介绍了铁焦制备的工艺流程及应用情况,重点进行了热压含碳球团制备工艺流程、冷态冶金性能、高温冶金性能、高炉使用热压含碳球团等试验研究,最后利用多流体高炉数学模型对高炉使用热压含碳球团操作进行了模拟研究。研究表明,高炉使用一定量的含碳复合炉料可以降低热空区温度,增加产量,降低焦比,高炉热利用效率明显提高,操作性能得到有效改善。 相似文献
19.
Summary A special experimental investigation established the possibility of the use of continuous annealing in heat treating sulfonated cermet sleeves in a 6-h cycle. A special three-section furnace with a protective atmosphere and pusher operation was developed for this purpose. 相似文献
20.
中国钢铁行业重点工序烟气超低排放技术进展 总被引:6,自引:1,他引:5
钢铁行业已成为中国大气污染防治重点行业,目前中国已提出钢铁行业烧结、球团等工序超低排放限值。总结了烧结(球团)、焦炉、高炉、转炉等多个工序高效净化技术路线,集成了源头减排、过程控制和末端治理的多污染物超低排放技术体系,包括“烟气循环技术”、“半干法脱硫耦合中低温SCR脱硝技术”、“活性炭法一体化技术”、“臭氧氧化硫硝协同吸收技术”、“高炉炉料结构优化的硫硝源头减排技术”、“转炉二次烟气预荷电袋滤器除尘技术”等关键技术,上述技术在中国部分钢铁企业均有应用实践。最后提出了生产技术绿色化、污染计量合理化、加强非常规污染物管控、重视钢铁行业碳排放的发展建议。 相似文献