共查询到19条相似文献,搜索用时 328 毫秒
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提出采用炼钢污泥、石英砂、锰矿按一定比例混合制成半钢炼钢用造渣剂的方法,并通过工业试验验证了新型造渣剂用于转炉炼钢造渣的可行性,实现了炼钢污泥的循环利用。工业试验表明,与原复合造渣剂相比,新型造渣剂具有更好的冶金效果。新型造渣剂初期渣形成时间缩短0.5min,脱磷率平均提高1.2%,终点钢水残锰质量分数平均提高0.01%,终点炉渣T.Fe质量分数平均降低0.55%,炉渣物相组成满足溅渣护炉的要求,循环利用具有良好的溅渣护炉效果。 相似文献
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根据攀钢转炉除尘灰特性,研制了用于半钢转炉炼钢的新型复合造渣剂和终渣调渣剂以及用于转炉提钒的冷却剂。分析新型复合造渣剂和终渣调渣剂对转炉冶炼终点氧化性、溅渣护炉、钢铁料消耗以及转炉脱磷效果等影响,拓展了转炉尘资源的使用途径,使攀钢转炉尘资源得到较好的循环经济利用,减轻环保压力。 相似文献
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转炉渣中铁氧化物的回收一直是冶金领域的一个难题。通过对转炉渣进行适当地改质,将铁氧化物转变成强磁性矿物MgFe2O4再进行磁选,从而达到回收转炉渣中铁氧化物的目的。首先研究了碱度和煅烧温度对转炉合成渣中MgFe2O4形成的影响,然后对工业转炉渣进行了改质。试验方法包括XRD、SEM-EDS、Factsage热力学模拟以及化学元素分析。结果表明,试验中理想的碱度为2,理想的煅烧温度为1 250和1 300 ℃。通过向工业转炉渣加入6%的SiO2,并从1 400 ℃以1 ℃/min的速度缓慢冷却到1 270 ℃,可使改质渣中形成MgFe2O4。磁选后磁性渣中的全铁质量分数为37.00%,比工业转炉渣中的全铁质量分数提高了15.80%,同时也比未经改质直接磁选的效果要好。 相似文献
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介绍了迁钢转炉复吹的发展历程,并对迁钢新开发的转炉全炉役底吹稳定控制技术(SEBC)进行了介绍。采用该技术后,解决了低底吹搅拌强度下的转炉底吹效果难以稳定控制的难题,实现了转炉全炉役碳氧积稳定控制,平均碳氧积不高于0.002 0,即使在炉龄6 000炉次以后,碳氧积依旧能够保持稳定控制。以1号转炉为例,转炉复吹效果的提高和稳定带来转炉溅渣成本降低31.83%,转炉补炉料成本降低38.28%,转炉脱磷率由85%提高到87%,终渣TFe质量分数由17.29%降低到15.60%,溅渣时间缩短45 s,氧活度降低1.64×10-4。 相似文献
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为了有效地循环利用转炉钢渣,攀钢结合热泼法和热闷法工艺的特点,开发了"闷泼法"转炉钢渣预处理工艺。结果表明,渣水比控制在0.035~0.045时,可使转炉渣的粉化率提高到90%,游离氧化钙含量下降2.58%,为后序生产创造条件。 相似文献
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通过枪位、渣料、氧压控制有效解决了转炉冶炼前期喷溅渣循环利用造成的喷溅,为转炉清洁生产探索出新途径. 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
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Converter off gas, an important energy resource for steel enterprises is one of the weak points in the recovery and utilization of secondary energy resources. To improve the level of recycling converter off gas in steel plants, a novel approach to recycle CO2 separated from converter off gas or other off gas for the green slag splashing technique was developed, and the CO2 equilibrium conversion ratio of the green CO2 slag splashing in different technological conditions was calculated by HSC software. Furthermore, the experiments of CO2 injected into melting converter slag were carried out, and the influence factors of the green CO2 slag splashing technique were analyzed. The results showed that the carbon amount for smoothly CO2 slag splashing was about 4.0%. 相似文献
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新余钢铁公司25 t转炉溅渣护炉工艺的研究 总被引:1,自引:1,他引:0
采用缩小的冷态模型,对新余钢铁集团有限公司25t顶吹转炉的溅渣护炉工艺进行了研究。结果表明,顶吹气体流量的提高有利于增加炉衬的溅渣密度;当气体流量为7000m^3/h时,最佳枪位为1.4m;从整个炉衬的溅渣密度来看,最佳渣量为8%-10%,综合考虑炉衬和炉帽的溅渣量,最佳渣量为10%。将以上溅渣工艺参数应用到实际生产中,并采用改渣剂对高氧化铁终渣成分进行调整,新余钢铁集团有限公司转炉平均炉龄由2238炉增加到8721炉,最高炉龄达到11675炉。 相似文献