共查询到17条相似文献,搜索用时 203 毫秒
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为延长转炉底吹寿命,提高供气强度,维护好炉型,保证经济炉龄,采用“中心管+环管”强底吹供气模式,以满足转炉大流量底吹要求。通过分析使用透气砖供气元件时炉衬侵蚀机理,探索了“中心管+环管”底吹供气模式炉衬维护机理;还开发了强底吹模式下的供气制度,实施单独供气模式,设置冶炼各阶段供气强度,并根据炉役不同阶段调整;在稳定控制炉底厚度的同时,采取优化转炉溅渣工艺、溅渣后保持较大的留渣量、装料前调整铺底石灰加入量及加入工艺等措施,比较180 t转炉炉龄2 600次时使用不同底吹供气元件炉型发现:使用透气砖时炉型较差,炉底高低不平,造成耳轴部位侵蚀大;转炉使用“中心管+环管”时,炉底高度均匀,整体炉型良好,炉衬侵蚀很小。 相似文献
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介绍了传统转炉炉衬综合砌筑主要存在的问题,重点对熔池圆弧过渡、炉帽、底吹透气砖、炉底砖厚度设计进行了分析。通过对新型转炉炉衬综合砌筑的优化研究,对熔池圆弧过渡、炉帽、底吹透气砖、炉底砖厚度进行进一步优化,保证了转炉炉帽、圆弧过渡、透气砖、炉底等区域均衡侵蚀,实现转炉炉型的良好控制,提高了转炉各部位耐侵蚀的能力,降低了吨钢耐材消耗,保证了复吹冶金效果。 相似文献
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《钢铁冶炼》2013,40(6):521-528
AbstractConverter lining life is an important technical and economic concern of the steelmaking process. An increase in lining life decreases refractory consumption and reduces steelmaking costs. Increased availability of furnaces increases production rates and steel yield. Extended lining life was achieved by utilising the slag as a consumable refractory by splashing it over the lining. Slag splashing is a simple and effective technique followed worldwide to increase the converter life. This paper highlights the online study on various operating parameters and slag characteristics for consistent slag splashing in a 130 t converter. Parameters such as lance height, blow pattern, gas flowrate, bottom purging flowrates, tapping temperature, combination of gunniting with splashing, slag height and slag chemistry, were investigated. An optimised slag has been developed which served effectively to balance the lining erosion during blowing and maintain a uniform thickness throughout the campaign. Some innovative practices and design changes are also discussed. The developed slag regime and optimised parameters have helped in increasing the converter life to an international benchmark. JSW Steel has achieved the converter lining life of 13 771 heats, which is the highest ever recorded in India. 相似文献
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Slag splashing is the most effective technology to improve the furnace campaign of converter; however, due to the great difference of composition between the vanadium slag and the steel slag, the technology has not been applied in the vanadium extraction converter. To solve the serious problem of lining erosion in the vanadium extraction converter, in this paper, slag splashing with modified vanadium slag was studied. The results showed that the purpose of adjusting the state of vanadium slag can be achieved through the modification. The modified slag had good slag splashing performance. After slag splashing, the thickness of the furnace was increased by more than 10?mm. The content of CaO in the modified vanadium slag can be controlled less than 3%, and the quality of vanadium slag and semi-steel was not obviously affected. The metallic iron content in the slag was greatly reduced, which was beneficial to reduce the iron loss in the vanadium extraction process. 相似文献