强化技术改良,提升漆包机生产质量

为进一步提高漆包机的生产效率及生产质量,需要从漆包机功能特点出发,并将一些老化、功能丧失的漆包机及时淘汰,同时充分运用漆包机烘炉能量,从而促进漆包机加热系统和冷却系统优化。     

转炉干法除尘系统泄爆分析及应对措施

系统分析了电除尘器产生泄爆的原因,并结合生产归纳出避免泄爆的有效措施,降低了系统检修率,从而提高了生产效率。     

转炉干法除尘系统泄爆分析及应对措施

以太钢北区炼钢180 t转炉干法除尘系统的生产数据为基础,系统分析了产生泄爆的原因,并结合生产归纳出避免泄爆的有效措施,降低了系统检修率,从而提高了生产效率。     

转炉干法除尘泄爆问题分析及系统设计

电除尘器泄爆是干法除尘设备在使用过程中经常遇到的问题,影响人员和设备安全,干扰生产顺行。介绍了转炉干法除尘技术的工艺流程、主要设备组成和在国内的使用情况,重点阐述了电除尘器泄爆类型、泄爆原理、导致泄爆的因素、控制泄爆的措施以及控制效果,同时提出在蒸发冷却器出口增设烟气成分在线分析仪,并参与控制。针对泄爆开发基于模型的控制系统,实现了智能化控制,减少了人为操作因素对干法除尘系统的影响,达到减少泄爆并最终消除泄爆的目的。     

某小型针刺雷管半爆原因分析及解决措施

某小型针刺雷管在生产定型后的头两年生产中产品质量一直较稳定,但以后的批量生产中频繁出现了半爆问题。根据生产定型后连续几年的生产特点,针对该问题,进行了原因分析和验证试验,找到了生产工艺中产生半爆问题的主要因素,并采取了相应的解决措施,保证了产品的生产质量。     

半钢炼钢转炉干法除尘系统泄爆分析及应对措施

对承钢120 t半钢炼钢转炉干法除尘泄爆进行调查、统计和分析。分析了泄爆发生的主要原因,并提出了相应的改进措施。通过优化开吹供氧曲线和规范冶炼操作,泄爆次数逐月减少,稳定了转炉的生产节奏,提高转炉的产能,减少除尘设备的损害。     

Φ12mm热轧带肋钢筋K1架次爆槽的原因

针对全水平机列四切分轧制工艺生产Φ12 mm热轧带肋钢筋时出现的K1架次成品孔型频繁爆槽的问题,对产生爆槽的原因进行了分析,对孔型冷却系统、孔型布置做了相应改进,严格控制了"黑头钢"和轧件头尾尺寸,最终解决了K1架次频繁爆槽的问题。     

QBL—96／2立式扁线漆包机的设计制造

针对旧立工扁线漆包机存在的缺陷和不足，适应当代世界先进水平电机的使用要求，武钢集团公司电气公司为了促进生产发展，重新设计、制造了一套QBL—96／2立式扁线漆包机。     

巴润矿山特殊形状爆区爆破设计优化

由于矿山实际生产过程中各种因素的干扰,经常会出现形状极其不规整的待穿孔爆破场地,不同的爆区规划方式和爆破设计方案会对最终的爆破经济技术指标和设备的作业效率造成严重的影响。以"镰刀形"异形爆区为例,通过系统性的爆区场地规划和爆破设计,将异形爆区网路设计以及分区爆破设计进行合理的优化,通过设计双起爆网路的掏槽列掘沟爆破,很好的缓解了由于爆区场地空间限制导致的爆破夹制作用,改善了爆破后采装货源的质量,降低了爆破成本,降低了爆破对生产的影响,提高了设备的作业效率。     

氢爆工艺及其对钕铁硼磁体性能的影响

文章介绍了钕铁硼合金薄带的氢爆反应原理、生产工艺、较传统工艺的优点及能够对其产生影响的因素。对比了氢爆工艺与传统工艺对磁体性能及结构的影响。阐述和分析了氢爆工艺和气流磨制粉工艺在目前钕铁硼磁体生产过程中的重要性。     

PVDF氟碳彩涂板的生产开发

介绍了PVDF氟碳涂料及其彩板产品的性能特征，分析了八钢彩涂机组试生产PVDF氟碳彩涂板的开发应用过程。     

Life-Cycle Cost Based Maintenance Plan for Steel Bridge Protection Systems

Life-cycle cost analysis was used to compare different alternative strategies for steel bridge paint systems. It was also used as a tool for steel bridge paint rehabilitation planning. The existing paint systems are lead-based and zinc-vinyl, while the new system is an inorganic/organic zinc, epoxy, and urethane paint system (three-coat). Economic analysis using present value (PV) and equivalent uniform annual cost (EUAC) was applied to compare several steel bridge paint system alternatives. The PV and EUAC were also used to compare different rehabilitation scenarios within the same alternative. Life-cycle cost analysis computations indicate that the three-coat paint system was better than others. Researchers concluded that the best scenario for three-cost system rehabilitation was doing spot repairs every 15 years of paint life. A maintenance plan based on life-cycle cost analysis also favored the “spot repairs every 15 years” scenario. A sensitivity analysis was also conducted to account for uncertainty in the cost, conditions, and subjective data.     

彩涂板脱漆缺陷对耐蚀性能影响分析

针对彩涂板压型后在使用过程中因表面漆膜脱落．造成耐蚀性能劣化的问题进行了分析,采用扫描电镜、能谱仪和盐雾腐蚀试验等方法,对缺陷板进行检验。结果表明,彩涂板前处理钝化层缺失是其产生脱漆缺陷、造成耐蚀性能下降的主要原因,而涂层厚度减薄也是其中原因之一。     

硅钢涂层中树脂成分对电泳漆附着性影响的试验研究

通过对涂覆涂层中无机成分、有机成分和含有不同树脂成分的无取向硅钢涂层样板进行电泳涂漆工业试验,研究电泳漆附着性的影响因素。结果表明：涂层中无机成分对电泳漆附着性无不良影响,涂层中树脂成分对电泳漆附着性有显著影响。     

Life-Cycle Cost Analysis using Deterministic and Stochastic Methods: Conflicting Results

Life-cycle cost analysis is an essential approach to differentiating alternative rehabilitation strategies for steel bridge paint systems. An economic analysis (EA), which is a deterministic method, and the Markov decision process (MDP), which is a stochastic method, were used to carry out the life-cycle cost analysis. These analyses were applied to data from two state Departments of Transportation. The deterioration curves for steel bridge paint condition rating against age were constructed. Different rehabilitation scenarios were proposed for steel bridge paint. The EA and the MDP were used to analyze and differentiate among the proposed rehabilitation scenarios. The results of the EA were different from those of MDP for the two data sets. MDP favored the “do nothing” scenario until the end of paint life and then a complete repainting. EA indicated that the scenario “do spot repairs at state 3 of the paint life” and repeat that until the end of the bridge life was superior. The results were analyzed to determine the reason for the conflict.     

连铸中间罐镁质涂料工作衬的实践与体会

本文介绍了连铸中间罐采用镁质涂料工作衬的实践情况。实践证明，采用涂料作工作衬具有施工简便、提高钢的质量、安全可靠及相对减轻劳动强度、延长中间罐使用寿命、降低耐材消耗等优点。对促进连铸生产的发展，具有重要意义。     

The bake hardening behaviour of electro‐galvanized cold rolled CMnSi and CMnAlSi TRIP steels

Cold rolled, intercritically annealed TRIP steels will very likely be used as electrogalvanized sheet steel for passenger safety‐related automotive body parts. This implies that their properties during and after manufacturing, i.e. in the deformed and paint‐baked state, must be known to evaluate their actual in‐service properties. The ageing behaviour of electrogalvanized TRIP steels and the effect of controlled ageing of the complex microstructure by paint baking on the mechanical properties was therefore investigated. Electroplating tests showed that the H uptake during pretreatment and electrogalvanization is limited and that the paintability of the electroplated sheet steel is unaffected even after deformation induced transformation of the austenite. In addition, a strong bake hardening effect was found in the case of the CMnAlSi TRIP steel. Internal friction measurements indicated that a damping peak for interstitial C could be obtained but that the free C content was less than 1 ppm prior to paint baking. A BH mechanism for TRIP steels is proposed.     

Optimising the corrosion performance of pre-painted steels

Pre-painted steel is one of the most important structural material of the 20th century well known for its excellent corrosion resistance and wide ranging applications.A typical pre-painted steel usually consists of a layer of metal coating system,preferably zinc or zinc alloy coating and a combination of layers of inorganic - organic coatings usually referred to as paint system.The corrosion resistance of the metal coating as well as the paint system may vary considerably based on their composition and t...     

干熄焦钢结构的防腐

对济钢干熄焦工程钢结构重新进行防腐处理 ,采用环氧树脂系列涂料作底层 ,丙烯酸聚氨酯涂料作面层 ,经合理设计方案 ,严格规范施工 ,达到了预期效果     

含镍、铬不锈钢尘泥资源化利用探讨

不锈钢生产会产生大量的不锈钢除尘灰和酸洗污泥等含镍、铬固体废弃物,如若处理不当,不仅会导致大量镍、铬等资源的浪费,而且会造成严重的环境污染。目前,含镍、铬不锈钢尘泥资源化利用途径虽然较多,但无论是回收其中有价金属元素,还是生产水泥、陶粒、化工颜料和肥料等资源化利用,都存在一定的局限性。因此,展望未来不锈钢尘泥的资源化利用应以直接返生产工序循环利用为重点研究和发展方向。