中长粉路碾磨系统设置及磨辊技术参数的探讨

本文分析了我国自行设计和由国外设计的面粉厂的一些粉路,在对其生产情况进行对比的基础上,对一些有争议的问题如:各系统如何设置,各研磨系统磨辊技术特性如何配备等提出了自己的看法,以供同行参考。     

宝钢150t超高功率直流电弧炉用耐火材料

介绍、讨论了宝钢１５０ｔ超高功率直流电弧炉耐火材料的设计特点,以及投产一年多来的使用情况,并根据操作经验认为：（１）造成泡沫渣埋弧操作非常关键;（２）镁铝尖不石底电极套筒砖性能优越;（３）冷态下底电极套砖接长修补是可行的;（４）采用高钙、低硅,适量的铁的烧结镁砂制成的炕底捣打料性能良好;（５）采用热态修补出钢口技术能大大延长出钢口砖寿命;（６）小炉顶的材质建议采用镁碳砖环状砌筑。     

Untersuchungen zur Bestimmung der Biegebruchfestigkeit gebundener Schleifmittel

Investigations to determine the bending strength of bonded grinding materials Apart from the process characteristics, the safeness of grinding wheels against the breakage caused by centrifugal forces is of special interest. The calculation of the bursting speed of grinding wheels based on experimentally determined bending strengths deviates significantly from measured bursting speeds. This is because of the incorrect determination of the bending strength based on BGG 931. By taking into account the plane stress conditions in the area of applied load, an improved approach to determine the bending strength of bonded grinding materials was developed.     

火电厂磨煤用低铬铸铁磨球的优化生产及应用

选用低铬铸铁生产磨球，经热处理后，磨球硬度HRC 45－51，冲击韧性≥6 J/cm^2，在电厂磨煤机中运行后，1t煤磨耗为128－140g，耐磨程度是锻钢球的3倍。     

边磨边浸－炭吸附提金新工艺研究

以塔式磨浸机为核心，对金矿石进行边磨边浸，然后进入炭吸附，使金矿石的全泥氰化浸出率达到９６．６％，金的总回收率达到９３．４％。一台塔式磨浸机取代传统磨矿流程中的一磨、二磨、螺旋分级、水力旋流器及部分浸出槽，大大缩短工艺流程，节省能耗５０％。     

Nitrogen losses by denitrification and leaching in grassland

In this study nitrogen losses by denitrification and leaching have been quantified in a natural grassland, comparing the losses produced by a mineral fertilization (calcium ammonium nitrate) and an organic fertilization (cow slurry). It has been stated that in the edafoclimatic conditions of the Basque Country denitrification losses are more important than those produced by leaching, spring and autumn being the seasons with a greater risk of losses. These losses are great and immediately occurring after mineral fertilization and small but distributed along the time when organic fertilization is applied.     

磨矿分级自动控制系统技术应用研究及推广

介绍了磨矿分级自动控制技术原理,主要技术特点、功能以及投入生产应用后产生的良好效果。与同期人工操作比较,选钼回收率提高了0．85个百分点;磨机效率提高2．41t/h;溢流细度(-200目含量)提高了1．78个百分点;工艺控制水平和工艺稳定性大大提高,经济效益显著。     

五龙金矿破碎工艺技术改造实践

五龙金矿选矿厂破碎工艺及设备已使用了近50a,虽几经改造,但因设备陈旧,配置不合理,严重地制约了生产,通过设备更新与技术改造,不仅使碎磨工艺实现了“多碎少磨”。降低了能耗,提高了生产指标,而且改善了工作环境。     

探索有效的培训方式,促进企业发展

通过培训达到提高职工队伍整体素质的目的,采用的培训形式有两种,一是因地制宜,立足企业内部力量进行培训;二是突出重点,"走出去,请进来",拓宽培训渠道.     

双层堤基黏性土盖层渗透稳定判据

双层堤基的渗透破坏首先是从黏性土盖层开始的。现有的渗透稳定判据,一方面可能因低估承压水头而偏于危险,另一方面又忽视了黏性土的渗透特性,大大低估了黏性土的抗渗稳定性,导致评价过于保守。基于对“渗而不流”特征及黏性土渗透特性的认识,揭示洪水期黏性土盖层的“不透水”本质,把黏性土盖层的临界稳定问题归结为点抗裂稳定问题,对双层堤基黏性土盖层渗透稳定判据进行初步探讨。