综合利用锰矿资源冶炼锰系铁合金的探讨

根据我国锰矿资源条件 ,结合现行的熔剂法工艺在电炉中冶炼高碳锰铁和锰硅合金 ,通过对多项主要技术经济指标的对比和可行性分析表明 ,高硅酸性锰矿采用无熔剂法或少熔剂法工艺生产锰硅合金 ,既可提高锰和硅的回收率 ,增加铁合金产量 ,使锰矿资源得到更充分的利用 ;又可降低能耗和原料的消耗 ,使产品的生产成本降低 ,经济效益提高     

浅谈原料对高碳锰铁生产的影响

通过对高碳锰铁矿热炉塌料原因、原料熔点及原料粒度三个主要方面进行分析,给出了选择合适的原料粒度,将粉状炉料的使用量控制在合理范围内,确保炉料具有良好透气性,同时保证电极插入深度等措施;避免炉料出现悬料层;通过锰矿热处理降低原料熔点及保证锰矿入炉时"Mn/可分O_2";选择熔点相对较低的锰矿,可保证高碳锰铁大型矿热炉安全运行的前提下获得良好的经济指标。     

锰矿中SiO2含量对高碳锰铁生产指标的影响

本文通过数学计算和生产结果分析,阐述了矿热炉熔剂法生产高碳锰铁时,锰矿中SiO_2对产品矿耗、质量及电耗的影响,并指出,必须把SiO_2％也作为考核锰矿的重要指标,才能使生产指标及经济效益获得改善。     

中国锰矿资源开发利用现状

通过实地调研和翔实的数据系统深度的阐述了我国锰矿资源开发利用现状,结合我国锰矿资源的特点,分析了锰矿下游主要产品的基本情况,指出了我国锰矿资源的开发利用前景。     

微波加热含碳锰矿球团冶炼高碳锰铁的研究

对微波加热含碳锰矿球团冶炼高碳锰铁进行了试验研究,探明配碳系数、炉渣碱度对锰回收率的影响。结果表明,采用微波加热含碳锰矿料球,可以冶炼出符合要求的高碳锰铁合金。配碳系数及炉渣二元碱度对锰元素回收率影响显著,当配碳系数为1.4、炉渣二元碱度为2.0时,锰元素回收率最高可达90%以上。当配碳过量时,锰元素回收率下降明显。     

需求和成本因素导致高碳锰铁价格不断攀升

据市场人士透露，由于最近进口锰矿高涨，48度以上的澳洲锰矿价格达到了75元／度以上，而且供应紧张。价格不断攀升，同时，部分地区的焦炭价格也升到了1500元／t以上，给高碳锰铁生产商。特别是高炉锰铁生产商增加了不少成本。进入四季度以后，钢厂考虑到枯水期到来，铁路运输紧张等因素，必然增加采购量冬储，使得高碳锰铁的需求大增。     

以富锰渣配料冶炼优质锰铁的探讨

总结瓦房子锰矿两年来用富锰渣做配料生产较高品位锰铁的经验教训，探讨贫锰矿的综合利用及锰矿贫化后高炉锰铁原料的发展方向。     

近期国际及国内铁合金市场分析与展望

11月份欧洲和亚洲市场硅铁价格保持平稳,美国市场有所回升。受减产支撑,2006年首季度欧洲硅铁价格有望上涨。2005年世界锰矿产量增长而锰系铁合金生产对锰矿的需求前景仍不太乐观,市场人士预计明年锰矿年度合同价格高于3美元/吨度的可能性不大。另外,在过去的一个月中,国际市场高碳铬铁现货价格继续走低。考虑到不锈钢减产可能延续至下季度及今年4季度高碳铬铁现货价比合同价低得多等因素,铬铁生产商对2006年首季度铬铁合同谈判前景并不乐观,合同价可能继续下滑。从国内市场来看,硅铁及锰系铁合金市场总体保持平稳,高碳铬铁价格继续下跌。由…     

配用部分进口锰矿提高高炉锰铁经济效益

我国高炉锰铁的产量虽占高碳锰铁总量的80％以上,但由于我国贫锰矿多,富锰矿少,加上锰的选矿技术目前在经济上还存在一定的问题,致使未经处理的原矿在高炉料     

锌在高碳锰铁熔炼炉爆炸中的作用

锌在高碳锰铁熔炼炉爆炸中的作用Ｙ．Ｅ．Ｌｅｅ（埃肯开发中心）埃肯公司埋弧炉中的一台高碳锰铁炉发生一次严重的爆炸事故。为了查明原因，通过对炉子里的炉子周围物料的检测进行了全面的研究。结果发现炉子不断地产生锌的聚集作用，锌来源于所用的含锌锰矿。经断定，炉...     

Improved manganese extraction in the production of manganese ferroalloys

In the production of manganese ferroalloys from ore, about 50% of the manganese in the ore is lost. The manganese lost with the enrichment-slag tailings may be returned to the production of manganese ferroalloys by dithionate method of enrichment of the slurries. A technology is developed for the production of high-carbon ferromanganese from concentrate obtained by the chemical enrichment of tailings slurries. Low-phosphorus Mn slag is used in the production of ferrosilicomanganese and refined manganese ferroalloys. A method is described for alloying hot metal with manganese from slag during the production of lowand medium-carbon ferromanganese. Processes are developed for the production of medium-carbon ferromanganese by mixing ore–limestone melt with high-carbon ferromanganese and removing the phosphorus from Mn-bearing melts by bubbling with CO. The degree of phosphorus removal (70–90%) depends on the bubbling time. By means of improved production of manganese ferroalloys and extraction of manganese from slag and slurries, the manganese extraction may be significantly increased.     

Ore Melting and Reduction in Silicomanganese Production

The charge for silicomangansese production consists of manganese ore (often mixed with ferromanganese slag) dolomite or calcite, quartz, and in some cases, other additions. These materials have different melting properties, which have a strong effect on reduction and smelting reactions in the production of a silicomanganese alloy. This article discusses properties of Assman, Gabonese, and Companhia Vale do Rio Doce (CVRD) ores, CVRD sinter and high-carbon ferromanganese (HC FeMn) slag, and their change during silicomanganese production. The melting and reduction temperatures of these manganese sources were measured in a carbon monoxide atmosphere, using the sessile drop method and a differential thermal analysis/thermogravimetric analysis. Equilibrium phases were analyzed using FACTSage (CRCT, Montreal, Canada and GTT, Aachen, Germany) software. Experimental investigations and an analysis of equilibrium phases revealed significant differences in the melting behavior and reduction of different manganese sources. The difference in smelting of CVRD ore and CVRD sinter was attributed to a faster reduction of sinter by the graphite substrate and carbon monoxide. The calculation of equilibrium phases in the reduction process of manganese ores using FACTSage correctly reflects the trends in the production of manganese alloys. The temperature at which the manganese oxide concentration in the slag was reduced below 10 wt pct can be assigned to the top of the coke bed in the silicomanganese furnace. This temperature was in the range 1823 K to 1883 K (1550 °C to 1610 °C).     

微波加热含碳氧化锰矿粉体还原过程中锰铁金属化物的渗碳行为

纯净锰铁对纯净钢质量的影响至关重要,尤其是碳含量。微波可以快速加热含碳氧化锰矿粉进行体还原,为获得低碳锰铁奠定了基础。在碳氧原子摩尔比为1．06,rCaO：rSiO2分子摩尔比为1．28的条件下,采用微波加热法,对含碳氧化锰矿粉加热到一定温度并保温一定时间。结果表明：还原物料中锰铁金属化物的碳含量在0．11％～0．23％之间。随着物料温度的提高和保温时间的增加,锰铁金属化物中的碳含量随铁含量增加而提高,而随锰含量的增加而降低,但锰含量与铁含量呈负相关关系。由于铁比锰易于渗碳,因此物料温度、保温时间和物料的锰铁比是影响锰铁金属化物渗碳的主要因素。     

锰矿预热和热装工艺及其应用实践

为降低电耗，提高电炉生产能力，采用回转窑预热锰矿和热装工艺生产富锰渣用于冶炼金属锰和高碳锰铁。此工艺可使产品电耗降低约20％，电炉生产能力提高20％以上。实践证明，回转窑在电炉富锰渣的生产中的应用非常成功，经济效益显著。     

利用锰硅合金粉生产低磷中碳锰铁的理论研究与实验

利用锰硅合金破碎产生的残粉作为生产低磷中碳锰铁的主要原材料,通过分析电硅热法(冷装法)生产中碳锰铁存在的问题和产品碳高、磷高的质量状况,提出了“二步法”脱磷、“二步法”脱硅生产中低碳锰铁的新工艺。根据拟定的工艺实验方案,完成了台架实验和现场模拟实验。实验表明：采用脱磷合金和No．3造渣剂,可以实现MnSi合金同时脱磷、脱碳,合金中磷含量降至0．15％、碳含量降至1．40％以下;脱磷合金用量6％～14％,脱磷率约为18．5％～43．1％;低磷富锰渣预脱硅和锰矿终脱硅的“二步法”熔炼工艺能满足生产低磷中碳锰铁的技术要求。     

利用云南锰矿资源生产中碳锰铁的工业化实践

叙述了利用摇炉法应用云南锰矿生产中碳锰铁的工业化实践，它的成功有利于有效利用我省的高硅锰矿资源。     

新钢锰铁高炉使用进口锰矿的生产实践

新钢锰铁高炉使用进口锰矿始于1984年。目前，进口锰矿用量已占新钢锰铁高炉入炉锰矿总量的40％以上，为改善锰铁高炉技术经济指标、降低高炉锰铁成本、提高产品质量和企业经济效益发挥了重要作用。     

Production of high carbon ferromanganese using manganese rich slag in the charge

The possibility of replacement of the high cost sinter manganese ore by manganese rich slag for the production of high carbon ferromanganese was experimentally demonstrated. The experimental heats were designed and carried out to optimize this replacement through the adjustment of different production parameters. The results of pilot plant experimental heats showed that replacement of 50% of the sinter in the blend (or 25% of the blend) by slag containing 32% Mn and operation under slag basicity 0.9 and low (MgO)/(CaO) ratio of about 0.2-0.3 are the optimum conditions to attain the highest manganese content in the produced ferromanganese, the highest manganese recovery and the highest metallic yield. The industrial application of reusing manganese slag clarified the economic efficiency of charging manganese slag up to 20-25% of the blend in reducing the production cost due to reducing the cost of manganese ores. Charging of 20-25% manganese slag reduces the cost of manganese ores and the total production cost by about 13 and 6% respectively, comparing with the conventional technology (without using manganese slag in the blend).     

微波加热含碳氧化锰矿粉固态还原过程中硫的分配

在rC∶rO原子摩尔比为1.06、rCaO∶rSi O2分子摩尔比为1.27的条件下,通过电子探针面扫描成分分析,对微波加热含碳氧化锰矿粉固态还原过程中硫的分配进行了研究。结果表明:加热温度为1 000~1 300℃时,88%~96%的硫分配于气相中,锰铁金属化物中的平均硫含量为0.002%~0.017%;随着微波加热温度的提高和保温时间的延长,锰铁金属化物中的含硫量与含铁量呈负消长的关系,而与含锰量呈正消长的关系;提高微波加热温度和延长保温时间,有利于进一步改善含碳锰矿粉的气化脱硫效果。与传统冶炼方法相比,微波加热含碳锰矿粉以气化脱硫为主,并可以获得良好的脱硫效果。