综合利用进口锰矿,生产锰系列产品

青花钢铁厂利用高品位进口锰矿和城口高磷锰矿,按一定比例搭配,采用无熔剂法生产碳素锰铁和富锰渣,然后由富锰渣再生产硅锰合金。此工艺能获低硅、低磷的锰铁和生产硅锰合金所需的低磷、低铁的富锰渣;无熔剂法可降低综合冶炼电耗,提高锰回收率,降低生产成本,为生产硅锰合金取得好的指标提供了优质原料。     

花垣型高磷锰矿富锰降磷的研究

花垣型高磷锰矿为我国一大类型锰矿。该类型锰矿含锰品位低,含磷高。本文根据“七五”富锰降磷攻关课题,阐述了采用强磁选富集锰—黑锰矿法除磷工艺的连续扩大试验研究结果;当原矿中Mn19.83％、PO.30％时,采用该流程可获得Mn40.15％、PO.147％(P/Mn0.0037),锰回收率达82.71％的合格锰精矿。     

遵义锰矿28 m3高炉优化配矿探讨

通过对遵义锰矿 2 8m3富锰渣高炉生产的总结 ,借鉴湖南、广西和重庆城口富锰渣高炉的冶炼特点 ,在充分利用遵义锰矿高铁低磷碳酸盐锰矿的基础上 ,适量配入广西铁锰矿或本地贫锰高铁矿。提出适合遵义锰矿 2 8m3高炉生产的优化配矿方案     

扩建罗定锰矿加工基地的建议

扩建罗定锰矿加工基地的建议罗定市湘粤联营冶炼厂李元强罗定市新榕矿区的铁锰矿，以其低磷低硫的良好冶炼性能而在华南地区有很高的知名度，是全国十几家富锰渣冶炼行业不可缺少的主要原料。矿山自１９８７年建成投产以来，生产稳定，至１９９４年止共采原矿１９６万ｔ。...     

高铁锰矿粉熔融还原生产富锰渣新技术

富锰渣是电炉冶炼硅锰合金的原料,而高炉法是冶炼富锰渣的主要方法,但该方法存在工艺流程长,焦炭消耗量大,铅、锌等易挥发金属影响冶炼等问题。提出了高铁锰矿熔融还原冶炼富锰渣新技术,该技术具有工艺流程短,不需要消耗焦炭,铅、锌等金属可以综合回收等优点。试验研究结果表明,高铁锰矿熔融还原生产富锰渣工艺是可行的,在还原温度为1 400 ℃、还原时间为20 min的条件下,渣铁可以完全分离,铁、锰回收率高。     

合理搭配原生锰矿石冶炼富锰渣

玛瑙山锰矿13m~3高炉搭配原生锰矿冶炼富锰渣,按氧化矿、烧结矿、原生矿、古炉渣为63、7、20、10的比值,原生矿批重400kg,焦批重140kg,装料制度为正装,在现行操作制度下,炉况稳定,可生产出含锰37.46％,铁2.50％,磷0.007％的富锰渣。     

铁锰矿冶炼富锰渣的实践

铁锰矿冶炼富锰渣的实践昆明市金马冶炼厂于我省锰矿资源比较丰富，已探明的储量达４０００万ｔ，占全国已探明储量的７．４％，居全国第五位。，而且矿床规模大，储量相对集中；矿体埋藏浅，易于开采；矿石质量好，品位高，有害杂质含量低，选矿性能也比较好。但是，也有...     

湖南省道县锰矿冶炼厂炼出优质生铁和合格富锰渣

道县锰矿冶炼厂综合利用本县后江桥铁锰矿资源,采用单一的铁锰矿冶炼,摸索出火法富集同步两种合格产品——富锰渣和炼钢生铁的新工艺,同时还回收铅银。1988年     

高铁高磷难选锰矿高炉生产富锰渣的影响因素

以不同品位的高铁高磷难选锰矿为研究对象,通过分析碱度、烧结矿掺入量、炉温等关键因素对高炉富锰渣生产的影响,获得高铁高磷难选锰矿石生产富锰渣的新工艺方法和工艺条件,为难处理锰矿石的开发利用提供了新思路。     

湘潭锰矿富锰渣获省优质产品称号

湘潭锰矿富锰渣于1986年元月被评为省优质产品。该矿富锰渣具有锰铁比高、磷锰比低的特点,是冶炼硅锰合金、锰铁合金的上好原料。由于该矿富锰渣的优质产品产值率高,故远销北京、辽宁、安徽、贵州     

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).     

A review of the beneficiation of low-grade manganese ores by magnetic separation

ABSTRACT

Magnetic separation is an effective strategy for the upgrading of a variety of lean ores, including the beneficiation of low-grade manganese ores. This work reviews 24 studies on the magnetic separation of manganese ores; 6 of these studies report both a sufficiently high Mn grade (>44% Mn) and Mn/Fe ratio (>7.5) in the concentrate as to be suitable for use as high-grade feed materials in the production of ferromanganese. Of these 24 studies, the most efficient separation and enrichment was generally achieved by the reduction roasting of the ore prior to magnetic separation, rather than the direct separation of the ore. In both cases there was sufficient evidence for correlation, depending on the mineralogy, between the Mn and Fe grades of the ore and the final concentrate grade and Mn/Fe ratio. To yield a concentrate suitable for use in ferromanganese production, it is recommended that the ore contain a minimum initial concentration of ～25% Mn and ～10% Fe.     

Factors Affecting Silicomanganese Production using Manganese Rich Slag in the Charge

Silicomanganese is widely used as a complex reducer and an alloying addition in the production of various grades of steel due to its economic and metallurgical advantages. It is also used as a semi‐product in the manufacture of medium‐ and low‐carbon ferromanganese and metallic manganese. Manganese‐rich slag, resulting from high carbon ferromanganese production, has the advantages of high manganese content, high Mn/Fe ratio, low excess oxygen, low phosphorus content, low fine content and low cost. Such slag seems to be very attractive to use as raw materials for the production of silicomanganese alloys. In the present study, experimental heats were designed and carried out to optimise the factors affecting the production process of silicomanganese using manganese rich slag in the charge. The results of pilot plant experimental heats showed that the optimum metallic yield and recoveries of manganese and silicon are obtained with an initial slag basicity, (CaO + MgO) / (Al₂O₃), of 1.8 by using dolomite as fluxing material and charging quartzite and fluorspar in percentage of 25% and 4% of the blend, respectively. The results also showed that an amount of 30% of coke in excess of the stoichiometric amount should be added. These results are relative for the specific high Al₂O₃ ores used.     

Upgrading of Low-Grade Manganese Ore by Selective Reduction of Iron Oxide and Magnetic Separation

The utilization of low-grade manganese ores has become necessary due to the intensive mining of high-grade ores for a long time. In this study, calcined ferruginous low-grade manganese ore was selectively reduced by CO, which converted hematite to magnetite, while manganese oxide was reduced to MnO. The iron-rich component was then separated by magnetic separation. The effects of the various reduction parameters such as particle size, reduction time, temperature, and CO content on the efficiency of magnetic separation were studied by single-factor experiments and by a comprehensive full factorial experiment. Under the best experimental conditions tested, the manganese content in the ore increased from around 36?wt?pct to more than 44?wt?pct, and almost 50?wt?pct of iron was removed at a Mn loss of around 5?pct. The results of the full factorial experiments allowed the identification of the significant effects and yielded regression equations for pct Fe removed, Mn/Fe, and pct Mn loss that characterize the efficiency of the upgrading process.     

沙沟锰矿烧结性能探讨

贵州六盘水沙沟锰矿中的锰平均含量高达33.44%,铁含量为5.99%,属于典型的软锰矿。其锰铁比为5.58,有较低的硫和磷含量使该矿成为国内为数不多的锰系合金原料。但由于其极细的粒度（〈200目的矿粉占70%以上）和极粘的物理特性又使该矿不可能直接入炉冶炼,必须进行造块处理。本文通过不同碱度和配碳量的烧结杯试验探讨沙沟锰矿的烧结性能。     

天台山碳酸锰矿石的焙烧特性

天台山碳酸锰矿石,从组分分析,为CaMg[CO_3]_2—CaMn[CO_3]_2类质同象矿石,矿石中碳酸盐矿物的含量较高,二元碱度大于1.3,系中磷低铁碳酸锰贫矿。文章在全面分析矿石组成特征的基础上,介绍了它的焙烧特性。经自燃式竖窑焙烧工业试验,焙烧矿石平均锰品位比入炉矿提高15.09％,Mn/Fe值上升6,P/Mn值降低0.022。工业试验成果通过鉴定,已被生产采用。     

Silicomanganese production from manganese rich slag

Abstract

Manganese rich slag produced by the appropriate treatment of high manganese pig iron has a high manganese content and results in low fines, is low cost and gives low excess oxygen. Manganese recovery from this slag in the form of manganese ferroalloys compensates for the excess cost of the treatment process. Manganese rich slags produced from the injection of high manganese pig iron under at optimum conditions have levels of (Mn)>35 wt-%, (Mn)/(Fe)>7.65, (Mn)/(Si)>2 and (Mn)/(P)>285, which satisfy requirements for use as raw material in silicomanganese alloy production. Various experiments were carried out to smelt high manganese slag resulting from the treatment of high manganese pig iron to produce silicomanganese in a bench scale submerged electric arc furnace. Use of such manganese rich slag in the proportion of 40% of the blend has been found to be optimum to obtain a silicomanganese alloy with the highest metallic yield and highest manganese recovery. The silicomanganese alloy produced satisfies the standard chemical specifications, with manganese and silicon contents 68 and 18%, respectively.     

高铝低硅块矿工艺矿物学及冶金性能研究

研究了一种产自非洲的高铝低硅块矿工艺矿物学和冶金性能,并与几种国内外典型块矿的冶金性能进行对比.结果表明:非洲块矿是一种由赤铁矿、针铁矿和三水铝石等矿物组成的高铝低硅高铁矿石,微孔发达,Al2O3含量较高.而就其含铁品位及脉石含量而言,要明显高于国内天然块矿,但低于其它进口块矿.非洲块矿具有良好的还原性(RI80!)和低温还原粉化性能(RDI+3.15 mm达86.69!)、较强的抗热爆裂性能(DI-6.3mm1!)及与其它进口块矿相近的高温软熔特性,可与国内低铝块矿、烧结矿、球团矿搭配使用来满足高炉渣型的要求,进而控制炼铁成本、扩大原料来源.     

Calculations of manganese ferroalloys production efficiency from different ores

The cost of producing manganese alloys by reduction from manganese ore using carbothermic process is estimated. Alternatives of FeMn78 and SiMn17 production from rich Australian manganese ore with low-phosphorus concentration or low-phosphorus manganese slag in charge mixture with poor domestic Russian ore with comparatively high phosphorus content are calculated and presented in the article. Direct production costs for alternative variants in a wide range of cherge composition are estimated.