烧结混合料涪配加澳粉的工业试验

莱钢第二炼铁厂烧结车间，在混匀料成份、配比不变的情况下将澳粉在烧结配料室按不同配比加入混合料，研究了澳粉加入量对生产技术指标的影响。结果表明在澳粉配比为６％时，降低工序能耗７．８×１０＾５ｋＪ／ｔ，烧结要利用系数由１．２１ｔ／ｍ＾３．ｈ提高到１．２６ｔ／ｍ＾３．ｈ，但烧结矿转鼓强度有待提高。     

90m^2烧结机机冷工艺及生产实践

本文介绍了包钢二烧车间９０ｍ＾２机上冷却烧结机技术指标、工艺流程特点以及小球烧结技术应用情况,同时扼要地讲述了改造内容、主体设备,并对改造前后技术指标进行了对比,通过一年的生产证明采用机冷工艺后,利用系数提高０．０４１／ｍ＾２．ｈ,最高达到０．１０ｔ／ｍ＾２．ｈ。固体能耗降低７．２７ｋｇ／ｔ。     

新型纳米晶合金Fe72Cu1Nb2V2Si13B10和Fe72Cu1Nb1Mo1V2SI13B10的磁性能

本文报道新型Ｆｅ７２Ｃｕ１Ｎｂ２Ｖ２Ｓｉ１３Ｂ１０和Ｆｅ７２Ｃｕ１Ｎｂ１Ｍｏ１Ｖ２Ｓｉ３Ｂ１０纳米晶合金的磁性能。直流起始磁导率μｉ的水平分别为１３８．１６ｍＨ／ｍ和１１３．０４ｍＨ／ｍ；矫顽力Ｈｃ水平分别为０．６和０．６４Ａ／ｍ；对应Ｈｍ＝０．０８Ａ／ｍ和ｆ＝０．１和１ＭＨＺ的相对有效磁导率μｅ水平分别为２．７×１０＾４，２．５×１０＾４和０．４×１０＾４，０．３２×１０＾４；高频铁损水平分别为     

用于微波器件的大面积YBCO超导薄膜

高质量大面积ＹＢＣＯ薄膜是用原位中空柱状阴极直流磁控溅射装置制备的，化学计量比的超导靶的内为１００ｍｍ，加热器有效面积５０×４０ｍｍ＾２。在３０×３０ｍｍ＾２的Ｚｒ（Ｙ）Ｏ２ＬａＡｌＯ３基片上沉积的ＹＢＣＯ薄膜的厚度均匀度为±６％，临界温度Ｔｃ＞８９Ｋ，Ｔｃ不均匀性在１％以上，△Ｔｃ在０．８～０．９之间，临界电流密度Ｊｃ为２．０～３．５×１０＾６Ａ／ｃｍ＾２，△Ｊｃ为１．０～１．５Ａ／ｃｍ＾２，微     

宝钢3号高炉出铁场袋式除尘器的技术设计特点

介绍为宝钢３号高炉出铁场设计的大型负压袋式除尘器的主要性能及特点。该除尘器过滤面积为１０８００ｍ＾２，滤袋长度为１０ｍ，除尘器出口含尘浓度为５０ｍｇ／ｍ＾３，滤袋使用寿命为２年；整体漏风率小于２％。     

24m^2烧结机高炉煤气点火系统的设计与应用

张店钢铁厂２台２４ｍ＾２烧结机高炉煤气点火系统投入运行后，充分利用了高炉富余煤气，每年可节煤６８８５ｔ；与煤粉点火相比，烧结矿品位提高０．０２５５；含硫量降低０．０１％￣０．０３７％，含粉率由１４％下降到１２．５％；点火工作区含尘量由１９０ｍｇ／ｍ＾３降到１４０ｍｇ／ｍ＾３。     

普通硅酸铝耐火纤维毡导热系数的研究

根据实验数据，通过回归分析得到了普通硅酸铝耐火纤维毡导热系数的经验公式。公式反映了平均温度，体积密度和渣球含量对导热系数的影响，并可表示如下。λ＝０．０５５３８＋０．３４５４×１０＾－＾５（Ｓ×ｔ）＋０．２０９４＾１０＾－＾４（ｔ＾２／ρ）＋０．６８５４×１０＾－＾１＾０ｔ＾３公式适用范围为：３５０≤ｔ≤７５０℃，１１６≤２２０ｋｇ／ｍ＾３，Ｓ≤９．８％。在此范围内，公式与实验数据吻合良好。     

Al2O3／TiC陶瓷复合材料补强增韧机理研究

向Ａｌ２Ｏ３／ＴｉＣ陶瓷材料中分别添加１５％ＺｒＯ２、１５％ＺｒＯ２＋２２％ＳｉＣｗ，得到的ＡＴＺ和ＡＴＺＳ复合材料的弯曲强度σｆ、断裂韧性ＫＩＣ均比基体Ａｌ２Ｏ３／ＴｉＣ增加一倍，分别提高到９８９ＭＰａ、１０．９６ＭＰａ·ｍ＾１／２和１０９４ＭＰａ、１１．２６ＭＰａ·ｍ＾１／２。用ＳＥＭ和ＴＥＭ对材料显微结构、断口形貌及界面结合情况进行观察分析表明，ＡＴＺ和ＡＴＺＳ复合材料的强韧化机制主要为Ｚｒ     

从含钼废液中萃取回收铼

介绍了从含钼废液中萃取回,收铼的工艺条件。第１步钼铼共同被萃取;第２步只有铼进入伯胺－中性磷酸盐有机相,分离系数βＲｅ／Ｍｏ〉１０＾４,高铼酸钾产品纯度大于９９％。     

钼酸盐－丁基罗丹明B光度法测定痕量钌

研究了用钼酸盐和丁基罗丹明Ｂ（ＢＲＢ）比色测定实际样品中的钌。离子缔合物的最大吸收位于５７０ｎｍ，摩尔吸光度ε值为１．０１×１０６Ｌ·ｍｏｌ－１·。ｃｍ－１．桑德尔灵敏度０．１１ｎｇｃｍ－２．遵守比耳定律范围０～１．４μｇ／２５ｍｌ，测定极限３．３ｎｇ／ｍｌ（ｍ＝８），标准偏差８．３×１０－４～８．７×１０－３，相对标准偏差０．８％～３．３％。考察了４３种共存离子的容许量。本法已用于某些岩矿和冶金产品中钌的测定。     

大型多级混合澄清萃取槽的设计探讨

归纳列出了现有混合澄清萃取槽的不足之处 ,以设计 2m3混合室的多级萃取槽为例 ,论述如何克服所述的不足 ,并用图示说明本设计导流管的连接方式和液面控制装置的结构及控制效果。整个萃取槽构造和配置经济合理 ,简单易行。     

Thickening and rheological properties of slurries as functions of the oxidized nickel ore composition

The thickening and rheological properties of ore slurries and pulps after autoclave sulfuric acid leaching are analyzed as a function of the phase composition of oxidized nickel ore. Experiments have been carried out with samples of ferrous, silicate and combined ores. The initial concentration of the ore slurries is ～28%. Higher values of thickening properties (thickening rate of 1.3 m/day, thickened layer concentration of 54%) are exhibited by the ferrous ore slurry and the pulp after its leaching (thickening rate of 0.9 m/day, thickened layer concentration of 42%). The thickening rate of silicate ore slurry is 0.15–0.2 m/day, the thickened layer concentration is 40–45%. The thickening properties of the pulp after autoclave sulfuric acid leaching of silicate ore strongly depend on the consumption of sulfuric acid. The thickening properties of combined ore and pulps after its leaching deteriorate with increase in the content of silicon dioxide in the ore. In terms of the rheological properties, all slurries are pseudoplastic systems. Poorly thickening slurries are characterized by a high dynamic yield stress (up to 7 Pa) and apparent plastic and effective viscosities. The effective viscosity at the equivalent shear rate corresponding to the mixer rotation rate in laboratory autoclave reaches 34 × 10^–3 Pa s. Boundary values are determined in rheological constants with regard to the thickening properties. For instance, if the dynamic yield point is <1.0 Pa, the thickening rate increases from 0.2 to 1.3 m/day; if the yield point is >1.0 Pa, the thickening rate decreases from 0.075 m/day to zero. The thickening and rheological properties are found to depend on the particle size of solid phase and its surface properties.     

端口驻波比对混频器变频损耗影响

设计24．1GHz集成环形混频器电路，用Aglient ADS软件进行了仿真优化，对研制混频器电路进行了性能测试和分析。测试结果表明，通过调节端1：3驻波比可以较大改善混频器的变频损耗，使混频器的变频损耗最大减少10dB左右。     

混合机筒体危险截面的确定和强度校核

筒体装置是圆筒混合机的主体。由筒体、滚圈、大齿圈、筒体内附件等组成。本文分析了5B150 3.6 m×13 m圆筒混合机筒体上载荷的分布情况,确定了滚圈危险截面并根据建立的数学模型进行强度校核。     

圆筒混合机倒料问题分析及对策

针对360 m2烧结机一次混合机倒料问题进行了分析,通过采用增设高压水、气装置等方法,解决了混合机倒料问题。     

Palladium stripping rates in PGM refining

This study investigates the stripping (back-extraction) of palladium from the perspective of mixer–settler hydrodynamics. A hydroxyoxime extractant and hydrochloric acid medium are used. Firstly, the palladium stripping rate (chemistry) is determined using a vigorously stirred laboratory unit cell. This increases with operating temperature and stripping acid concentration. At optimal chemical conditions (25 °C, 6 N HCl), the stripping rate is sufficiently fast for equilibrium to be reached within 5–10 minutes. Secondly, the palladium stripping rate (hydrodynamics) is determined using a pilot-scale mixer–settler. The mixer–settler is operated with a 4-bladed radial disc and a 6-bladed Rushton turbine impeller, over a range of impeller speeds corresponding to power intensities of 2 to 5 kW/m³. The palladium stripping rate increases with increasing impeller speed for both the radial disc and Rushton turbine impellers. The overall mass transfer coefficient also increases with increasing power intensity, up to power intensities 100% higher than those used in typical plant stripping mixer vessels. When benchmarked against the power intensity, not much difference between the two impellers is noted. The study concludes that the stripping of palladium by solvent extraction as used in the PGM industry can be improved by operating at higher power intensities.     

高磷鲕状赤铁矿铁磷分离试验研究

对高磷鲕状赤铁矿进行了显微结构研究,采用添加脱磷剂直接还原焙烧-磁选工艺进行了铁和磷分离试验,研究了焙烧温度、内配碳量、添加剂配比对铁、磷分离主要技术指标的影响。结果表明:磷主要以磷灰石的形态嵌布在鲕状结构中,部分与赤铁矿形成环状间层,层间的厚度变化范围在3~15μm之间;在焙烧温度1 000℃、内配碳量6%、添加剂配比10%的优化工艺条件下,通过球磨-磁选试验可得到含铁品位大于85%、含磷量在0.15%~0.20%之间的优质还原铁粉和含磷为3.5%~4%的富磷渣。     

复吹转炉渣金间传质物理模拟及应用

 将200 t复吹转炉按照1：12的比例缩小,用液体石蜡模拟炉渣、水模拟钢水、压缩空气模拟顶吹和底吹气体,在实验室建立模拟复吹转炉吹炼过程熔池渣金间传质的试验模型,在顶吹气体流量为88 m3/h条件下,通过相对集中非对称布置的4、6、8、10、12支底枪吹入不同底吹气体,用苯甲酸作为传输物质,试验测定了复吹转炉熔池渣金间的容量传质系数,考察不同底枪支数和布置以及底吹气体流量对渣金间传质速率的影响,优化复吹转炉底枪布置和底吹气体流量,以增强复吹转炉熔池的搅拌,改善熔池渣金反应动力学条件。研究结果表明,当底吹气体流量为1.14 m3/h时,在4～12支的底枪布置方案中,4、6支底枪布置方案的容量传质系数(分别为1.77×10-4、1.80×10-4 L/s)低于8、10、12支底枪布置方案的容量传质系数(分别为2.41×10-4、2.24×10-4、2.42×10-4 L/s);当底吹气体流量为0.57 m3/h时,在8～12支底枪布置方案中,10、12支底枪布置方案的容量传质系数(分别为1.68×10-4、1.69 ×10-4 L/s)明显大于8支底枪布置方案的容量传质系数(0.95 ×10-4 L/s);在底吹气体流量不小于1.14 m3/h后,8、10、12支底枪布置的容量传质系数相差不大,在2.24×10-4～2.87×10-4 L/s的范围;在气体流量小于1.14 m3/h时,随着底吹气体流量的增加,渣金间的容量传质系数增加显著,底吹气体流量大于1.14 m3/h后,容量传质系数增加变缓。将12支底枪布置方案应用到实际复吹转炉,整个炉役的平均碳氧积为0.001 96×10-4,在不同炉龄阶段,终点钢水平均碳氧积为0.001 88×10-4～0.002 04×10-4,终点钢水碳氧积小于0.002 5×10-4的炉次比例达到90.53%。     

新型混铁炉烟气除尘系统的研制和应用

介绍了安阳永兴钢铁公司600t混铁炉气幕式烟气除尘系统的工作原理、设备构造和工艺技术参数,以及应用的效果.该系统除尘效率＞99%,烟尘排放浓度＜100mg/m3,取得了满意的效果.     

Improving blast-furnace smelting at OAO NLMK

Smelting of hot metal with reduced silicon content is considered. The use of higher-basicity sinter with increased pellet content in the batch is of interest. Other options considered include the use of a gasoxygen mixer and optimization of product discharge at OAO NLMK.