硅锰合金电炉的节电途径

介绍了硅锰合金电为了电的途径，降低渣比，减少渣量，提高锰回收率，选择适宜的工作电压，控制好炉温，减少锰的挥发，降低渣中ＭｎＯ含量，减少锰的金属损失等。     

从钴土矿中提取有价金属的试验研究

研究了常温常压下,采用SO2浸出-离子浮选-溶剂萃取工艺从钴土矿中综合提取钴、锰、铜、镍等有价金属.结果表明,锰回收率大于97%,钴总回收率大于95%,镍总回收率大于90%.     

大洋多金属结核盐酸浸出工艺中分离镍锰及回收锰

研究了用碳酸铵沉淀法从大洋多金属结核盐酸浸出工艺的锰镍溶液中分离锰，镍并回收制备ｒ－ＭｎＯ２的工艺，考究了碳酸铵的用量，沉淀ＰＨ值，沉淀时间，温度对沉锰率和镍回收率的影响以及淀碳酸锰的净化，灼烧条件等，制备出了合格的ｒ－ＭｎＯ２产品。     

提高锰硅合金中锰的回收率浅析

分析了影响锰硅矿热炉锰回收率的原因，结合实际生产情况，指出了提高锰回收率所采取的措施，取得了较好的经济效益。     

铜锰渣深度处理回收金属工艺研究及应用

对铜锰渣中金属含量进行分析，经热力学和试验条件下研究提出铜锰渣金属逐一分步沉淀的步骤，比选确定铜锰渣金属分离工序的选择性试剂和最优条件，并进行中试试验。结果表明，最优工艺路线和工艺控制条件为：1)铜锰渣浆化工序温度30 ℃、液固比3.0~3.5、搅拌时间30 min；2)碳酸锰浸出工序温度60~70 ℃、铁粉用量为理论量的0.7±0.05倍、反应时间3.5 h；3)富集铜工序温度30 ℃、液固比1、反应时间3 h；4)回收钴工序温度70~80 ℃、pH=3.0~3.5、搅拌时间30 min；5)回收锰工序温度70~80 ℃、pH=8.0~8.5、搅拌时间60 min。工艺条件稳定性和金属回收率达到预期，产品质量和工艺成熟度达到要求。     

从锌电解阳极泥中回收锌锰并富集铅银的试验研究

试验研究了一种从锌电解阳极泥中回收锰并富集铅银的新工艺,该工艺处理成本低,可脱除50%的钙镁;锰锌有价金属可高效回收,回收率大于95%,且锰以符合标准的碳酸锰产品回收;铅银可富集4倍以上,利于后续工序的处理。     

某含金银锰矿石选矿试验研究

某低磷高硫多金属原生碳酸锰矿石可供选矿回收的主要组分为锰,金、银可综合回收利用.针对矿石性质,试验采用浮选—磁选联合工艺流程回收锰、金和银.结果表明:在最佳试验条件下,获得了较高品级的锰精矿,且有价金属金和银有效富集在硫精矿中;硫精矿中银、金品位分别为945 g/t和10.30 g/t,银、金回收率分别为72.43％和...     

少熔剂法冶炼高碳锰铁中锰回收率的控制及其对锰硅合金冶炼的影响

阐述了锰回收率对少熔剂法冶炼高碳锰铁各项指标的影响及基本要求，分析了少熔剂法富锰渣对锰硅冶炼工艺的影响，提出了少熔剂法锰回收率的合理控制方法。     

广西大新锰矿选矿厂洗矿溢流的回收利用

广西大新锰矿选矿厂,由于其洗矿作业的溢流跑粗且含锰品位偏高,影响选矿厂锰金属回收率。通过对洗矿作业的查定及产品粒度组成和回收试验结果的分析,论证从溢流中回收流失的锰矿物的必要性和可能性。     

苏联奇阿图拉选矿厂锰矿泥回收的研究的途径

奇阿图拉矿区锰矿石可选性研究结果证明,采用各种主要选矿方法所获商品锰产品的锰回收率都不大于70%。用重选法时,大部份(20～25%)的有价锰金属损失于尾矿的细级别中。矿泥的产率约为50%,其锰品位为15～17%。为了从矿泥中最大限度地回收锰,而必须解决矿泥的选矿问题。“奇阿图拉锰业托拉     

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).     

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.     

Optimum condition for smelting high carbon ferromanganese

Abstract

In the present study, pilot plant experimental heats were designed and carried out to determine the optimum condition for smelting high carbon ferromanganese through investigating some parameters affecting the smelting process including Mn/Fe ratio of the blend, coke ratio, slag basicity and dolomite/limestone ratio of the flux. The results of pilot plant experimental heats showed that using Mn blend with high Mn/Fe ratio decreases the consumption of charging materials: Mn ores, coke and fluxing materials (limestone and dolomite). This means that lower amounts of Mn ores, coke and flux materials can be used for attaining the same output alloy weight by increasing the Mn/Fe ratio of the blend. Furthermore, the produced slag decreases as Mn/Fe ratio of the blend increases. The higher Mn/Fe ratio of the blend does not only reduce the input materials and the produced slag, but also improves the produced alloy quality by increasing the Mn percent and Mn/Fe ratio of the produced high carbon ferromanganese. For obtaining standard HCFeMn alloy containing minimum 75%Mn, it is necessary to use Mn blend with the Mn/Fe ratio of higher than 6·2. The added coke must be adjusted according to the material balance and stoichiometric to prevent the over-coke and minimise the highly endothermic ‘Boudouard reaction’ to attain the highest Mn recovery and metallic yield. Furthermore, the slag basicity should be optimised with flux addition to attain the highest Mn recovery and metallic yield. The optimum slag basicity for attaining the highest manganese recovery and metallic yield depends on the used formula. The slag basicity can be determined from the chemical composition of raw material mixture with taking into consideration that about 2% of silicon in the raw material mixture will be reduced and goes into metal phase. Much higher slag basicity is not recommended as this practice produces viscous slag accompanied with lower Mn recovery and metallic yield. The results also revealed the negative effect of increasing MgO/CaO ratio of slag on manganese recovery and metallic yield. The MgO/CaO ratio in the slag decreases by decreasing the dolomite/limestone ratio in the flux.     

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.     

高纯Mn_3O_4和锰系列化合物的制备

由实验验证了用铵盐溶液溶解金属锰粉同时通入空气氧化直接制备Mn_3O_4的方法;并探索了用氨基甲酸铵溶液溶解片状金属锰,经加热沉淀为碳酸锰再高温焙烧为Mn_3O_4的方法:都取得了较好的结果。两种方法各有其特点:     

Sadie wouldn''t let go of her pain

Plasma concentration of metallic ions levels during menstrual cycle of twenty normally menstruating women were observed in four phases i.e. menses, follicular, ovulatory and luteal. The concentration of magnesium, zinc, selenium and manganese was highest during menses and lowest at ovulatory phase. There was rise in ionic levels of magnesium and selenium, while fall in zinc and manganese during luteal phase. Findings demonstrate changes in metallic ions (Magnesium, zinc, selenium and manganese) level in relation to hormonal status during menstrual cycle in women.     

Reuse of tailings slag from manganese production

The smelting of metallic manganese may be modified so as to produce slag tailings that are suitable for metallurgical reuse.     

乙酸铵介质中金属锰与水反应制备高纯氢氧化锰

研究了乙酸铵介质中金属锰与水的反应，考察了反应过程中有关参数对反应速度的影响。研究证明，在乙酸铵介质中，金属锰可与水反应制备高纯氢氧化锰。实验结果表明：随着乙酸铵浓度的增加，反应速度加快，随着反应温度的升高反应速度反而减慢；锰粉单位表面积上的反应速度随反应时间的延长基本不变。     

转炉终点钢水残锰质量分数及其影响因素分析

通过对转炉终点生产数据和铁水成分的统计分析,研究了影响转炉终点钢水残锰含量的因素及其变化规律。研究表明,转炉终点碳含量和铁水硅含量对转炉终点钢水残锰含量及其收得率影响最大;提高转炉终渣碱度和终渣FeO含量对转炉终点钢水残锰含量及锰收得率产生不利影响。铁水初始锰含量升高有利于提高转炉终点钢水残锰含量,但锰的收得率反而下降;在高拉碳条件下转炉终点钢水温度对锰收得率的影响不明显。     

中国海底锰结核处理技术研究概况

21世纪是海洋的世纪。海底锰结核中含有大量的锰、铁、铜、钴、镍等金属元素，被公认为是一种重要的陆地矿产替代资源。自其被发现以来就引起了各国相关人士的极大关注，而如何合理开发利用海底锰结核、早日实现商业化生产则一直是关注的焦点所在。半个世纪以来，国内外众多学者进行了大量研究工作，提出了许多处理海底锰结核的工艺和方法，新的探索也一直在继续。本文重点对中国开展的海底锰结核处理技术及其非冶金加工利用的研究情况进行了介绍。