二次冷轧机组乳化液流量与浓度综合优化设定

针对以往现场对于二次冷轧机组直喷系统润滑与油耗研究较少、乳化液流量与浓度分开设定、不能同时兼顾润滑性与油耗的问题,在充分结合二次冷轧机组直喷系统的设备与工艺特点的基础上,从油耗固定模式以及润滑保证模式入手,考虑到钢种与规格的影响,建立了相应的适合于二次冷轧直喷系统的乳化液流量与浓度综合优化设定技术,编制出了相应的乳化液流量与浓度综合优化设定软件,并将其应用到某钢厂1 220二次冷轧机组的生产实践,取得了良好的使用效果,具有进一步推广应用的价值。     

弥散型阳离子乳化液在新钢冷轧厂的应用实践

针对新钢冷轧板表面残油残铁含量高、油耗高、表面反射率不高的现状,对乳化液的品种选择及乳化液系统进行了相应改进,取得了较好的使用效果。     

单机架冷轧机工艺润滑系统改进及优化

针对单机架冷轧机乳化液系统运行中存在的乳化液浓度异常波动、带钢表面残留量大等问题,对系统供液管道、乳化液箱体及辅助设施进行了改造。改造后乳化液浓度变化趋于稳定,同时钢板表面残油量从最高673.5 mg/m2降低到223mg/m2,带钢表面质量得到改善的同时轧制油耗大幅降低。     

二次冷轧机组乳化液管路直接混合润滑系统开发

 针对传统直喷润滑系统不能实现乳化液流量与浓度的同时在线调整,造成二次冷轧机组升降速与钢种切换过程中轧制不稳定、板厚与板形质量不佳、轧制能耗与油耗总成本较高等问题,结合二次冷轧机组的设备及工艺特点,在搭建的试验平台上完成了乳化液管路直接混合润滑系统关键设备选型,提出了一套适合于二次冷轧机组的乳化液管路直接混合润滑系统设计方案、对管路直接混合与混合箱搅拌混合乳化液特性进行了对比,并将该润滑系统应用到某钢铁企业1 220二次冷轧机组的生产实践,有效提升了轧制稳定性、带钢厚度与板形质量、降低了轧制能耗与油耗总成本。     

轧机油耗高的原因分析与改善措施

冷轧酸轧机组轧机为自主集成设备,其设计和制造过程中存在一些缺陷,液压系统及润滑系统油耗占全厂油耗的80%,从而导致漏油点较多,漏油量居高不下,同时对乳化液的污染严重,影响了轧机的生产速度和产品质量,且油耗过高还增加了吨钢成本。就轧机漏油问题进行了分析,并提出了降低油耗的具体管理措施。     

酸轧线乳化液系统的改造

新钢冷轧厂酸轧线投入使用后,乳化液的使用达不到预期的效果,对酸轧线轧机乳化液使用中存在的问题进行了相应改进,加强温度控制、减少基础油耗及杂质含量,使得乳化液使用效果达到了轧制工艺要求.     

单机架冷轧机组乳化液系统震动的处理

结合现场生产实践,针对单机架冷轧机组出现的管路系统振动大的问题,提出降低管道压力、加固部分管道、更改管道连接方式等一系列工艺技术措施。经过改造后,彻底解决了乳化液系统震动问题,大幅降低了相应的故障处理时间和轧制油耗。     

单机架冷轧机组乳化液系统震动问题解决实践

结合现场生产实践,针对单机架冷轧机组出现的管路系统振动大的问题,提出降低管道压力、加固部分管道、更改管道连接方式等一系列工艺技术措施。经过改造后,彻底解决了乳化液系统震动问题,相应的故障处理时间和轧制油耗都大幅降低。     

六辊单机架冷轧机组乳化液系统的故障分析及优化改造

结合实际项目,就解决六辊单机架冷轧机组出现的带钢表面清洁度差、吨钢轧制油耗高、乳化液系统电机过载、管路系统振动大、板换及阀门备件更换频繁、乳化液泄漏等等问题,提出了降低带钢表面乳液残留,改善工艺润滑环境,降低设备备件、轧辊、轧制油消耗等一系列工艺设备改造措施,经过改造后,各项技术经济指标均达到了国内先进水平。同时为后续新建和改造类似项目的优化设计提供了可行的技术方案。     

轧制乳化液的工业试验及应用

工艺润滑可以有效地降低轧制力能消耗,减少金属损失,改善表面质量.根据工厂的特定条件,对乳化液I、II做了对比试验,结果表明:在相同的条件下,使用乳化液I比使用乳化液II,轧制力平均降低40 7%、轧制能耗平均降低33 3%、每班节水约0 6m3;辊耗减少0 11kg/t、中间废品率降低0 2%;油耗降低0 27kg/t,可以在体积浓度1 4%使用.乳化液腐败会直接导致其防锈性能下降,最终使乳化液II报废;所以延长乳化液使用周期必须加强使用维护,乳化液槽内温度应控制在50～55℃.     

四辊铜带冷轧机乳化液系统改造解决带面乳液斑

介绍了我公司4辊冷轧机乳化液循环过滤系统,及其在铜带生产实践中存在的问题。通过对乳化液系统过滤器、加热器、撇油器、搅拌器等综合改造,解决了带材表面乳液斑残留,取得了较好的使用效果。     

2000mm铝热粗轧机乳化液工艺润滑系统常见故障及技改措施

针对我公司2000 mm铝热粗轧机乳化液系统过滤能力低、流量不匹配、系统不稳定、乳化液清洁度差、乳化液泄漏等问题,提出了降低铝板带表面乳液残留,改善工艺润滑环境,降低轧辊和乳化液消耗等一系列工艺技术措施。技术改造后的各项技术经济指标均达到国内先进水平。     

Effect of superoxide and superoxide-generating systems on the prooxidant effect of iron in oil emulsion and raw turkey homogenates

Mechanisms of superoxide.O2--generating systems on the pro-oxidant effect of iron from various sources were studied. Reaction mixtures were prepared with distilled water, oil emulsion, or meat homogenates. Free ionic iron (ferrous and ferric), ferritin and hemoglobin (Hb) were used as iron sources, and KO2 and xanthine oxidase (XOD) systems were used to produce .O2-. Thiobarbituric acid reactive substances (TBARS) values and iron contents of the reaction mixtures were determined. Ferric iron and ferritin, in the presence or absence of superoxide-generating systems, had no catalytic effect on the oxidation of oil emulsion but became pro-oxidants when reducing agent (ascorbate) was present. Ferrous iron and Hb had strong catalytic effects on the oxidation of oil emulsion as shown by TBARS values. Superoxide and H2O2, generated from superoxide-generating systems, oxidized ferrous iron and ascorbate, and lowered the pro-oxidant effect of ferrous iron in oil emulsion. Addition of ferric or ferrous iron increased but Hb did not have any effect on the TBARS values of raw meat homogenates. The reaction mechanisms of superoxide and the superoxide-generating systems on the prooxidant effect of various iron sources indicated that .O2- was a strong oxidizer rather than a reducing agent, and the antioxidant effect of XOD system in oil was caused by the oxidation of ferrous iron to the ferric form by .O2- and/or H2O2.     

铜带材表面乳液斑改善实践

介绍了安徽铜陵金冠铜业分公司针对铜板带表面存在乳液斑等质量问题,对轧机的乳化液除油系统、轧机的乳化液过滤循环系统和轧辊的油气润滑系统进行综合改造的生产实践。改造后不但铜板带的表面质量得到明显的改善,而且能耗减少,取得了较好的经济效益。     

3+1型乳化液系统工艺润滑制度优化设定技术

为了研究配置3+1型乳化液系统的冷连轧机组生产不锈钢产品因轧制变形区欠润滑、过润滑以及冷却不足等导致冷轧带钢上表面和下表面质量差异的问题,以某钢厂新建六机架冷连轧机组为研究对象,从乳化液工艺润滑的角度出发,介绍了该机组3+1型乳化液工艺润滑系统布置,分析了工艺润滑制度参数对轧制稳定性的影响因素.通过揭示乳化液浓度、温度...     

Prooxidant effects of ferrous iron, hemoglobin, and ferritin in oil emulsion and cooked-meat homogenates are different from those in raw-meat homogenates

Oil emulsion and raw and cooked tissue homogenates were used to determine the mechanisms of various iron forms on the catalysis of lipid peroxidation. Flax oil (0.25 g) was blended with 160 mL maleate buffer (0.1 M, pH 6.5) to prepare an oil emulsion. Raw or cooked turkey leg meat was used to prepare meat homogenates. Samples were prepared by adding iron from each of the various sources, reactive oxygen species, or enzyme (xanthine oxidase and superoxide dismutase) systems into the oil emulsion or meat homogenates. In oil emulsion and cooked-meat homogenates, ferrous iron and hemoglobin had strong prooxidant effects, but ferritin became prooxidant only when ascorbate was present. Hemoglobin and ferritin had no prooxidant effect in raw-meat homogenates. The status of heme iron and the released iron from hemoglobin had little effect on the prooxidant effect of hemoglobin in oil emulsion and cooked meat homogenate systems. The prooxidant effect of ferrous iron in oil emulsion and cooked-meat homogenates disappeared in the presence of superoxide (.O2-), H2O2, or xanthine oxidase systems. In raw-meat homogenates, however, ferrous had strong prooxidant effects even in the presence of .O2-, or H2O2. The status of free iron was the most important factor in the oxidation of oil emulsion and cooked-meat homogenates but the impact in raw-meat homogenates was small.     

二次冷轧机组乳化液体积分数在线控制技术

 针对二次冷轧机组轧制升降速过程中轧制压力波动的问题,充分考虑乳化液直喷系统的设备与工艺特点,在分析了轧制速度、乳化液体积分数等对带钢表面析出油膜厚度、轧制变形区油膜厚度、摩擦因数、前滑值、轧制压力影响的基础上,建立了乳化液体积分数与轧制速度之间的对应关系,通过在线实时调节乳化液体积分数弥补升降速过程轧制压力的波动,形成一套二次冷轧机组乳化液体积分数在线控制技术。本技术在某钢厂1 220二次冷轧机组应用后,有效地减少了升降速过程轧制压力与带钢厚度波动,提升了轧制稳定性与产品质量,具有进一步推广应用的价值。     

A new cold rolling lubrication method combining emulsion and neat oil lubrication

The cooling and lubrication process is one of the key processes in cold rolling,as it not only determines surface quality and strip shape,but also reduces the rolling power consumption and extends the life of the roll even during high-speed operation.In this study,an innovative method combining emulsion lubrication and neat oil lubrication was used to solve some problems associated with individual passes.Laboratory tests on stainless steel strips showed that this new lubrication method could improve the surface quality of the strip,control the rolling friction in the deformation zone,and has the potential of making lubrication systems simpler and easier to operate, all while reducing the negative environmental impact from emulsion processing.     

刮油辊轴承失效分析及密封结构改进

武钢某厂森吉米尔轧机刮油辊系统因设计缺陷,在运行过程中乳化液容易浸入到刮油辊两端轴承的内部,污染润滑油,造成刮油辊轴承的严重磨损。通过改进刮油辊轴承密封结构,提高刮油辊的使用寿命,保证带钢表面质量。