WH-800型硫铵离心机的扩能改造

针对生产中出现的问题,用提高WH-800型活塞离心机转速,加大分离因数和活塞推料频率的方法进行扩能改造,在硫铵料层和含水量不变的情况下,使硫铵生产能力由5．5t／h提高到8．5t／h以上,满足了生产的需要。     

提高焦化厂硫铵离心机效率的若干措施

WH-800B离心机具有分离因数高、耗电省等优点，但在杭钢焦化厂用于硫铵生产时，故障较多。对其结构和关键零部件进行改进，解决一些问题，保证硫铵正常生产，也提高了设备使用效率。     

球团厂铁精矿烘干系统的改造

大冶铁矿球团厂针对铁精矿烘干系统原燃气供热回转烘干机运行成本高、抢修任务重、质量波动大等弊端，通过采用燃烧焦炭粉的高温烟气沸腾炉作供热设备、增加引风收尘系统、提高烘干机转速、采用组合扬料技术等措施进行改造，使烘干机产量由改造前的不足110t／h增加到140t／h，烘干每吨铁精矿的燃料成本由改造前的5．94元降到2．56元，实现了节能增产，很好地满足了大型工业回转干燥系统长期连续运行的需要。     

济钢25t转炉复吹技术的实践

介绍了顶底复吹技术在济钢25t转炉上的应用。在合理设计底吹流量控制方式的条件下，底吹强化了转炉内钢水的搅。拌，减少了钢水和渣的氧化，与顶吹工艺相比，钢水和锰的收得率分别提高了0．24％和2．5％，钢铁料和石灰消耗分别降低了2．4kg／t和2．0kg／t，年综合经济效益达313万元。     

DQL800．32型斗轮取料机提升取料能力改造

对原取料机斗轮机构、行走机构、悬臂皮带机等进行改造。使其取料能力由800t／h提高到1200t／h。     

改善高料层烧结过程透气性的新技术研究

针对料层厚度在650mm以上的高料层烧结所出现的烧结过程料层透气性恶化的问题，进行了一系列改善高料层烧结过程透气性的新技术研究，开发出透气板和料面松料器两种新装置，并在烧结杯试验中验证了明显改善烧结过程透气性的作用，强化了高料层烧结。采用透气板或料面松料器装置，烧结矿产品质量指标明显改善，利用系数提高了14．5％-23．6％，转鼓强度提高1．17％-1．33％，固体燃耗降低0．5kg／t烧结矿。     

莱钢3#750m3高炉开炉操作及快速达产分析

莱钢3^#750m^3高炉由于开炉准备工作充分，选择合适的开炉料和送风参数，送风后尽快降硅，高炉开炉5天时间即达产，其间无悬料、坐料，当月利用系数达到2．14t／m^3．d。     

加强技术创新 加快技术进步 为公司可持续发展而努力

1．1 技术经济指标完成情况①烧结机利用系数1．53t／m^2．h,同比提高0．016t／m^2．h。②冶金焦灰份14．31％。③全年入炉焦比446kg／t,同比降低76kg／t。④喷煤比达到102kg／t,同比提高36kg／t。     

粉矿湿式预选在金岭铁矿选矿厂的应用

为提前抛弃部分最终尾矿，提高入选矿石品位，降低磨矿能耗，通过实验室试验和半工业试验，证明了粉矿湿式预选技术预选尾矿铁品位仅为4．38％，铜品位0．038％，钴品位0．0103％，均低于或接近湿选尾矿品位，完全可以作为合格尾矿抛去．应用表明，球磨机处理量达到40t／h，比设湿式预选作业前提高5t／h，废石品位符合抛废要求，抛废产率为8.04％，每年可创经济效益70万元以上．     

铁水罐吹气辅助扒渣工艺开发及改进

针对武钢第一炼钢厂采用纯镁脱硫存在渣量少而稀，渣中硫含量高，扒渣困难，扒渣时间长达11分钟／次、扒渣铁损高达5kg／t、炼钢回硫达0．0051％的情况，提出了在铁水罐上安装透气砖吹气辅助扒渣工艺，选择了合理的透气砖材质及安装位置，并在实践过程中不断改进．改善了扒渣效果：平均扒渣时间≤7min，平均扒渣铁损降至3．5kg／t以内，平均出钢回硫降至0．002％以内．透气砖平均寿命达到110次以上。     

某碱性碳酸盐型含铜金矿氨氰工艺研究

采用氨氰浸出法处理某碳酸盐型难选冶含铜金矿。结果表明,控制给矿粒度-0.074mm占95%、石灰用量4.0kg/t、硫酸铵用量8.0~9.0kg/t、氰化钠总用量0.5~0.7kg/t、滚瓶氰化浸出52~72h,然后在活性炭密度10g/L吸附20~24h,进行12次循环试验,平均金浸出率86.0%,最终载金炭铜金比约2.0,金吸附率近100%,不存在铜、TDS逐渐累计问题。     

生物脱砷脱硫后金精矿的硫氰酸铵浸出试验

含砷难处理金精矿生物氧化预处理后,金精矿的金品位为87.23 g/t,经氧化脱砷脱硫后金精矿的矿物成分简单,对该金精矿样品进行硫氰酸铵浸出试验研究,通过不同氧化剂（次氯酸钙、高锰酸钾、硫酸铁）、氧化剂用量、浸出剂用量、浸出体系pH、浸出时间等条件进行试验,研究不同试验因素对硫氰酸铵浸出金的影响。在浸出体系pH小于2,浸出剂硫氰酸铵用量40 g/L,氧化剂硫酸铁的用量20 g/L,浸出时间5 h时,可获得金的浸出率为93.99%的良好指标。该氧化金精矿在常温常压下,采用硫氰酸铵浸出工艺是可行的。     

粗苯精制废酸再生利用的生产实践

以平煤集团天宏焦化公司3万t/年酸洗法粗苯精制废酸再生处理在硫铵工艺中使用的技术研发过程为基础,研究探索焦化苯精制废酸处理的新工艺,在工业试验中,采用泡沫分离、聚合、乳化物破乳化以及气浮主要工艺技术,将废酸处理到酸焦油、COD脱除率达到85％,满足化产回收硫铵工艺的使用,取得了较好的效果。     

空气氧化—氨浸出废旧电路板中的铜

提出了在氨水—硫酸铵体系下鼓入空气浸出废旧电路板中铜的新工艺。考察了氨水浓度、硫酸铵浓度、固液比、反应温度、通入空气流量和浸出时间对铜浸出率的影响。结果表明,在下述最佳浸出条件下,渣计铜浸出率达到96.67%:氨水浓度2mol/L,硫酸铵浓度2mol/L,固液比1∶20,反应温度25℃、通入空气量8m3/h、浸出时间4h。     

Leaching ion adsorption rare earth by aluminum sulfate for increasing efficiency and lowering the environmental impact

The leaching efficiency(LE) of ion adsorption rare earth(IARE) by the sulfate and chloride of ammonium,magnesium and aluminum were comparatively determined using column leaching method. It is found that at equal equivalent concentration of cation, the LE of IARE by aluminum sulfate is the highest, and the zeta potential of clay mineral particles in the tailing is near to zero, which means a lower risk of landslide and pollutant emission. Furthermore, the optimum concentration of aluminum sulfate is determined to be0.02 mol/L, which is much lower than that of ammonium sulfate and magnesium sulfate. To reduce the production cost and environmental impact, we proposed a multi-stage leaching process, which was firstly leaching with ammonium sulfate and then with aluminum sulfate, following by water washing and lime neutralizing. With the ratio of ammonium sulfate to aluminum sulfate varying from 1:0 to 0.5:0.5, the residual ammonium in tailing decreases from 11.2% to 0.6%, however, the LE of RE shows an optimum value at 0.8:0.2. By neutralizing the pH of tailing with lime water to over 6, the ion concentration in water rinsing solution can meet the requirement for water discharge. At the same time, the zeta potential of clay particles is found to be around-5 mV, means a relatively lower risk of landslide. These facts indicate that the LE of IARE can be increased and the danger caused by tailings landslides and pollutant emissions can be reduced by replacing ammonium sulfate with aluminum sulfate as leaching reagent.     

矿渣煤干系统技术改造

为了提高热效率,改善环境,鲁碧公司对矿渣烘干系统进行改造,采用高温烟气节能型沸腾炉替代回转炉箅层煤燃烧室,并改进烘干机内部扬料装置。运动结果表明,改造后的系统烘干机的热效率提高,台时产量由9．5t/h提高到14．6t/h,烟煤消耗由70kg/t降至50kg/t,经济效益显著,且改善了环境。     

磁场对离心铸造高碳高速钢组织和性能的影响

 用自制的电磁离心铸造机,在离心机转速为960r/min,磁场强度分别为005、010、015、020T的条件下,制备了高碳高速钢,试验研究了不同磁场强度下的高碳高速钢的铸态组织和热处理后的组织与性能。结果表明：随着磁场强度的增加,高碳高速钢的铸态组织中角状、点状碳化物的分布逐渐趋于均匀、弥散,共晶碳化物呈现出先减少、变短,后增加、变长的趋势;热处理后组织中的共晶碳化物变细、变短,且在磁场强度为015T的试样中硬度、冲击韧度和耐磨性能达到最佳。     

A survey on the intended purposes and perceived utility of preoperative cardiology consultations

N-methyl-D-aspartate (NMDA) antagonists, such as MK801, delay the development of morphine tolerance. Magnesium, a noncompetitive NMDA antagonist, reduces postoperative morphine requirements. The present study was designed to evaluate the effects of intrathecal co-administration of magnesium sulfate with morphine on antinociceptive potentiation, tolerance, and naloxone-induced withdrawal signs. Magnesium sulfate (40-60 microg/h) co-administration for 7 days, similar to MK801 (10 nmol/h), prevented the decline in antinociceptive response compared with morphine (20 nmol/h). Magnesium sulfate (60 microg/h) produced no antinociception, but co-infused with morphine (1 nmol/h), it resulted in potentiated antinociception compared with morphine throughout the 7-day period. Probe morphine doses after 7-day infusions demonstrated a significantly greater 50% effective dose value for morphine 1 nmol/h (109.7 nmol) compared with saline (10.9 nmol), magnesium sulfate 60 microg/h (10.9 nmol), and magnesium sulfate 60 microg/h plus morphine 1 nmol/h (11.2 nmol), which indicates that magnesium had delayed morphine tolerance. Morphine withdrawal signs after naloxone administration were not altered by the co-infusion of magnesium sulfate. Cerebrospinal fluid magnesium levels after intrathecal magnesium sulfate (60 microg/h) for 2 days increased from 17.0 +/- 1.0 microg/mL to 41.4 +/- 23.6 microg/mL, although serum levels were unchanged. This study demonstrates antinociceptive potentiation and delay in the development of morphine tolerance by the intrathecal coinfusion of magnesium sulfate and morphine in the rat. Implications: The addition of magnesium sulfate, an N-methyl-D-aspartate antagonist, to morphine in an intrathecal infusion provided better analgesia than morphine alone in normal rats. These results suggest that intrathecal administration of magnesium sulfate may be a useful adjunct to spinal morphine analgesia.     

针铁矿法喷淋除铁试验研究

巴彦淖尔紫金公司采用两段酸浸-黄钾铁矾法除铁工艺,一个锌系统每年浸出渣量为10万t/a,渣中含有大量的有价金属,其中铁30000t/a,锌4 000t/a,以及大量的铅和银金属,由于含硫较高,造成火法处理中尾气回收有很大的困难。通过研究发现,采用针铁矿法喷淋除铁后,大大降低了渣含硫,可以降低渣火法处理尾气回收的压力,同时由于不需要加入铵、钠等阳离子,也降低了生产成本。