隧道窑生产海绵铁

由于废钢短缺和海绵铁的优点．近两年转炉及电炉炼钢用海绵铁量大增．而且大部分依靠进口。利用隧道窑可以生产出符合炼钢要求的海绵铁，以替代进口。     

发展电炉钢要重视废钢铁产业和海绵铁产业建设

电炉的发展使世界废钢铁供应日趋短缺,并使海绵铁以年10％的速度增长。本文探讨了我国发展海绵铁的可行性,建议我国因地制宜地发展海绵铁生产,满足电炉炼钢的需要。     

电炉利用部份海绵铁炼钢工艺分析

本文从电炉炼钢利用海绵铁替代部份废钢的冶炼工艺角度出发，简要地分析了海绵铁的基本特性及在炼钢过程中应注意的问题。     

抚钢50t UHP电炉应用海绵铁生产实践

近年来,对电炉钢水质量要求越来越高。同时,循环使用的废钢有害金属残余元素高,优质废钢资源日趋短缺,电炉生产优质钢、合金钢、特殊钢的质量难以保证。本文为抚钢四炼钢５０ｔＵＨＰ电炉使用本厂生产的海绵铁的应用介绍。１抚钢海绵铁生产工艺及产品质量抚钢海绵铁生...     

台车底连续炉海绵铁生产技术探讨

分析了海绵铁生产技术在钢铁行业中发展趋势及其重要性,介绍了台车底连续炉海绵铁生产技术的特点及小型工业试验和在电炉炼钢试用情况。提出了进行大型工业化生产的可行性和必要性。     

台车底连续炉海绵铁生产技术控计

分析了海绵铁生产技术在钢铁行业中发展趋势及其重要性,介绍了台车底连续炉海绵铁生产技术的特点及小型工业试验和电炉炼钢试用情况,提出了进行大型工业化生产的可行性和必要性。     

电炉利用部分海绵铁炼钢工艺的分析

本文从电炉炼钢利用海绵铁替代部分废钢的冶炼工艺角度出发，简要地分析了铁的基本特性及在炼钢过程中应注意的问题。     

江苏冶金矿山发展海绵铁生产前景的探讨

文章指出了我省冶金矿山开发海绵铁生产的优越性和必要性。既缓解电炉炼钢废钢紧缺的矛盾,又解决矿山产品单一,价格偏低,经济效益差的被动局面。     

利用硫酸渣铁精粉制取海绵铁的研究

本文是以硫酸渣铁精粉为原料,低硫无烟煤作还原剂,添加定量石灰石,用实验室小转鼓模拟回转窑直接还原法制取海绵铁的研究,分析了各种因素对海绵铁质量的影响,试验结果表明,用硫酸渣铁精粉可以生产出低杂质含量高金属化球团供给电炉直接炼钢。为缺焦少矿的煤、电丰富地区,建设以直接还原铁生产的小钢厂开辟了一条新途径。     

炼钢的发展,工艺状况及今后的展望

纵观炼钢史,我们可以清楚地看到一九五○年以来氧气炼钢已迅速发展起来。今天这种炼钢已占世界钢产量的三分之二,冶炼工艺,工艺控制及生产率等都已很成熟,产品质量也很优良。与电炉炼钢相比,高炉+氧气顶吹转炉炼钢的不足是投资成本大,灵活性差。很难预料氧气炼钢与用废钢、海绵铁作原     

海绵铁在电炉上的应用试验

在３ｔ电弧炉上应用海绵铁试验生产４０Ｃｒ和２０ＣｒＭｎＴｉ钢锭，两次试验测得的海绵铁回收率分别为８０．１４％和７８．３４％，低于一般废钢回收率，试验证明，海绵铁能够稀释钢中Ｓ，Ｐ等有害残余元素，适合于生产优质钢，其用量以不超过２０％为宜。     

Some metallurgical aspects of steelmaking with sponge iron in electric arc furnaces

Test charges containing sponge iron proportions varying from 38.7–95.4 wt% of the metallic input were melted in a UHP electric arc furnace with a design capacity of 70 tons per heat. After melting started, samples of molten metal and the corresponding slag were taken simultaneously at different time intervals and analysed. The time dependence of the chemical composition of the metal and slag as well as the variation of the temperature of the melt with time are given. Thermodynamic calculations using different methods for finding the activity of ferrous oxide show that there is a linear relationship between a_(FeO) and the total ferrous oxide content in the slag. It is also found that the total ferrous oxide content in the slag and the oxygen concentration in the metal vary linearly with the iron proportion from sponge iron in the metallic input. The activity of ferrous oxide decreases with increasing slag basicity due to the formation of calcium ferrites. The relationship between the oxygen concentration and the reciprocal of the carbon content in liquid steel is almost linear. A formula showing the influence of some important factors on the oxygen content in molten steel is given. The effect of sponge iron on the sulphur concentration in the steel is also investigated. The present results indicate that the sulphur content in the steel can be reduced from 0.02 to 0.004 wt% by increasing the iron proportion from sponge iron in the metallic input from 35 to 95 wt %. Using the boundary layer diffusion model, it is found that the rate of decarburization of a steel bath is enhanced by increasing the sponge iron proportion in the metallic input. The activation energy of the decarburization reaction is found to be 56.9 kJ/mol and the mass transfer coefficient of carbon has a value of 0.0161 cm/s at 1 600°C. In a way similar to that used for decarburization, it is also found that the rate of oxidation of manganese dissolved in the bath is enhanced by increasing the sponge iron proportion in the metallic input.     

150t Fuchs竖式电弧炉的炉料配比对生产效率和产品质量的影响

研究了珠钢150 t Fuchs竖式电弧炉的各种钢铁料及布料方式对电耗、冶炼周期和冶金质量的影响。结果表明,配料时必须参照生铁、海绵铁最大加入量、上下工序产能匹配、产品中残余元素的控制、冶炼指标等要求,在质量、成本、效率等方面寻求一合理的平衡点。为加速熔化,在第一篮料的下部适当多装一些生铁和/或较优质的废钢;在最后一篮料的上部装一些质量较好的废钢,下压轻薄废钢避免结团挂料,上部不可装入过多生铁,避免化清后碳太高而导致冶炼时间延长。     

海绵铁的电炉冶炼

对鹿泉钢铁公司３ｔ电炉使用海失冶炼进行总结。通过１９９６年２月进行的４炉对比冶炼实验得出以下结论：小电炉使用３０－５０％海绵铁；总的冶炼周期缩短约２０％；电炉单位电耗减少１７－２７％，单位耗氧量降低４－２７％。电炉使用海绵铁做原料补充废钢的不足是必然的趋势。     

海绵铁生产与钢铁工业短流程

在实施能大幅度节约能源的钢铁工业短流程中，海绵铁的生产是薄弱环节。介绍了目前海绵铁生产的现状和存在问题，结合美国Ｆａｓｔｍｅｔ和Ｉｎｍｅｔｃｏ法的特点探讨了海绵铁生产的应走的道路，认为用敞焰加热快速原含碳团矿生产海绵铁是一种简单，经济，实用的方法。     

Removal of Phosphorous from Steel Produced by Melting Sponge Iron in Induction Furnace

In secondary route of steelmaking, production through induction melting furnace contributes about 31 % of India’s total steel production. The main raw materials used are steel scrap, cast iron and sponge iron. In India, majority of the induction furnaces are operated using acidic lining of silica based ramming mass to produce structural steel where basicity cannot be maintained to remove phosphorous and sulphur. In the present work, efforts are being made to generate the experimental data for refining of steel in 750 kg induction furnace. The basicity is maintained by addition of CaO and MgO in the form of flux. The slag is made oxidizing in nature by addition of sponge iron in the bath. Oxidation potential of the slag is fulfilled by presence of FeO in sponge iron. In every single heat, samples of slag and metal are collected. The degree of dephosphorization obtained is as high as 82 %.     

钢铁制造流程技术进步与钢铁企业可持续发展

通过钢铁生产工艺流程技术的演进并结合国情,阐述如何看待和参与电炉流程发展及钢铁企业可持续发展。叙述了钢铁生产工艺流程技术的发展简史,对长、短流程技术做了比较,同时列出了电炉炼钢技术进步要点,分析了我国电炉流程存在的问题,特别提出了对我国电炉流程的认识。预计到本世纪中叶,长、短两种流程会互相渗透、并存发展直至两者在一个最佳点上达到平衡,不远的将来,新的钢铁制造流程一定会出现。     

电弧炉用替代废钢的金属炉料的进展

直接还原铁、铁水、冷生铁、脱碳粒铁、碳化铁、复合金属料等替代部分废钢作为电弧炉金属炉料，不仅可解决目前废钢供应短缺，也有利于稀释废钢中有害残余元素，提高钢的质量，是电弧炉冶炼优质钢的必要条件。文中介绍了电弧炉用各种金属炉料的特点和使用效果。     

0.5t中频感应炉用海绵铁作原料冶炼纯铁的研究

在0.5t中频感应炉中,用海绵铁作原料,采用适当的冶炼工艺制度,可以冶炼符合GB9971-88标准的纯铁,产品可以满足冶炼高级合金钢、高温合金和非晶母合金的需要。