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“一步法”冶炼(镧基)稀土硅铁合金的试验研究与应用效果分析 总被引:2,自引:0,他引:2
稀土硅铁合金是目前国内外应用较广的钢铁处理剂。我国现行的稀土硅铁合金生产方法是先将硅石、钢屑、焦炭在矿热炉内冶炼出75硅铁,再以75硅铁和稀土矿渣或稀土精矿为原料,以石灰作熔剂,在电弧炉内进行第二次熔炼得到稀土硅铁合金。该方法称为电弧炉法,也叫做“二步法”。该工艺存在着产品生产周期长、电耗高、稀土金属回收率低及生产成本高等问题。为了克服上述问题,我厂首次采用稀土 相似文献
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本文简单介绍了稀土硅铁合金的生产现状和三种典型生产工艺;概述了优化生产工艺、提高稀土硅铁合金(孕育剂)和稀土镁硅铁合金(球化剂)品质的方法、措施。 相似文献
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一种以“一步法”工艺生产的“镧基稀土硅铁合金”新产品,最近由江西省乌石山铁矿研制成功,并通过省级鉴定。经检索查新,国内外未见有关报导,系首创。“镧基稀土硅铁合金”是国内一种首创新产品,化学性能稳定、性能可靠、用途广泛,是目 相似文献
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本文浅探在电弧炉硅热法生产高品位稀土硅铁合金时,采用选择性还原工艺,降低产品放射性,以扩大产品出口量。 相似文献
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分析了我国稀土硅铁合金的现状,比较了国内的三种生产工艺,展望了我国稀土硅铁合金的发展前景,提出了我国稀土硅铁合金的发展方向。 相似文献
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研究了从真空钙热还原炉渣中回收稀土的工艺条件;采用本工艺得到的合格稀土溶液,其回收率达65.41%;副产品氟化钙用作炼硅铁合金的助熔剂,使钙热还原炉渣得到综合利用。 相似文献
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《Baosteel Technical Research》2010,(Z1):100
There are lots of physical changes and chemical reactions in the processes of iron and steel making, these processes are quite complex in the aspect of heat transfer.The processes of iron and steel making can be approximately divided into three kinds.The first kinds are the processes of fusion metallurgy which involve enormous chemical reactions,such as blast furnace,converter,electric furnace and coke oven.The second kinds are the processes of heating and cooling which are mainly the physical changes,such as walking-beam reheating furnace,annular heating furnace and car-type furnace.The third kinds are the processes of heat treatment which mainly adjust metallurgical structure of metal,such as roller hearth heat treatment furnace, strip continuous heat treatment vertical/horizontal furnace and HPH bell-type annealing furnace.Every process can only be finished in particular thermal equipment.And all the physical and chemical processes mentioned above must obey first principles of engineering thermodynamics,heat & mass transfer,hydromechanics, combustion,metallurgy physical chemistry etc,and which can be summarized as principle of heat transfer,mass transfer,momentum transfer and chemistry reaction.In this paper,based on first principle of heat and mass transfer in iron and steel making processes,a series of mathematical models of thermal equipments and processes are presented.Such as the model of hot-blast stoves,coke oven,CDQ-boiler system,sintering, reheating furnace,soaking furnace,annular heating furnace,roller hearth heat treatment furnace,strip continuous heat treatment vertical/horizontal furnace,HPH bell-type annealing furnace,control cooling of medium plate,burner,heat exchanger and regenerative burner etc.The on-line application of the model is based on experimental certification of the mathematical model.And finally the computer optimization system of metallurgical thermal process is obtained. 相似文献
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红土镍矿处理工艺的现状及发展方向 总被引:5,自引:0,他引:5
介绍了电炉法、鼓风炉法、烧结-高炉还原等火法和氨浸、加压酸浸、常压酸浸等湿法处理红土镍矿的主要工艺特点及其现状,结合红土镍矿的性质及其分布特点分析了几种常用处理方法的优势与不足,探讨了未来处理红土镍矿的工艺发展方向. 相似文献
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介绍了国内外钛护炉的理论研究和实际应用及效果。提出了高炉全炉钛护炉、用含炭冷固钛球团护炉,用钛精粉和炭粉混合料喷补护炉等方案,建立了进行开拓性试验。 相似文献
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根据LF炉生产、工艺、设备的特点,建立了适合柳钢实际的LF炉生产模式;对LF炉的生产设备进行了整改,使得其更好的服务于生产;为了能够更好的实现LF炉的升温、脱氧、去夹杂的功能,对LF炉的生产工艺进行了优化。 相似文献
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攀西钒钛磁铁矿直接还原两种工艺的技术分析与选择 总被引:3,自引:0,他引:3
根据攀西钒钛矿资源综合利用的现状,分析了钒钛矿直接还原的特性。针对目前较为流行的回转窑与转底炉直接还原工艺,对比分析了两种工艺直接还原钒钛磁铁矿的优缺点,得出了转底炉直接还原工艺更有利于攀西钒钛磁铁矿资源综合利用的结论。 相似文献
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A multizone mathematical model developed at Nekrasov Institute of Ferrous Metallurgy reveals the internal relations between
the processes in a blast furnace. Using this model, the smelting processes and parameters in two different blast furnaces
are investigated with wide variation in the flow rates of natural gas and coke-oven gas and in the distribution of the materials
over the furnace radius. New scientific and practical findings are reported. 相似文献