RM57/28;TRM53.41;立磨

我公司现有两条5　000t/d生产线。1号线生料磨采用的是Polysius公司生产的RM57/28立磨,于2005年5月投料生产。2号线生料磨采用的是天津水泥工业设计研究院有限公司生产的TRM53.41立磨,于2011年2月投料生产。现就两种立磨生产运行情况做一对比分析。     

CRM4622立磨在矿渣粉磨中的应用

山西省潞城市卓越水泥有限公司于2011年底建成一条60万t/a的矿渣微粉生产线,该生产线通过DCS实现集散控制,其中粉磨设备选用成都建筑材料工业设计研究院有限公司的CRM4622立式磨。     

辊压机辊面现场再生性自动堆焊修复方法

1前言天津振兴水泥有限公司于2004年建成并投产了一条熟料2500t/d水泥生产线。为了提高粉磨效率,降低粉磨能耗,配置为一台TRP1400×     

水泥磨系统磨尾风机改造

内蒙古亿利冀东水泥有限公司综合利用工业废渣2 500t/d生产线于2006年6月开工建设,2007年8月水泥粉磨生产线投产运行,2008年1月水泥熟料煅烧系统投产运行:该水泥生产线为100%电石渣替代石灰石生产水泥熟料,年产熟料75万t,水泥120万t.该公司配套2条水泥粉磨系统,φ4.2m×13m水泥磨带1.4m×1m辊压机的挤压联合粉磨开流系统生产线,其中辊压机为带有O-SeDa选粉机的半终粉磨系统.     

CRM4622矿渣立磨的特点及粉磨系统调试

为响应水泥行业节能减排、发展循环经济的号召,成都建材工业设计研究院开发了CRM系列矿渣/熟料立磨。鲁碧建材有限公司公司为合理利用莱钢集团排出的矿渣,充分利用高炉煤气,保护环境,发展循环经济,于2010年11月建成了年生产能力为60万吨国产化矿渣粉磨生产线。该生产线通过计算机集中控制系统监测     

开流磨联合粉磨系统的设计选型及其实践

<正>1前言河南邓州花洲建材有限公司一条3200t/d生产线配套的两套水泥粉磨系统采用的是辊压机循环辊压,后接开流磨的联合粉磨工艺,分别于2008年6月、2008年9月正式投产。工程设计由天津水泥工业设计研究院有限公司完成,关键设备辊压机和水泥磨等均由中天仕名科技集团供货。本文将以此项目为主要对象,介绍开流磨形式的联合粉磨系统的设计及工程应用。     

TRM型辊磨在赞比亚2500t/d水泥熟料生产线的应用

介绍了国产大型辊磨设备在中国建材赞比亚建材工业园2500t/d水泥熟料生产线的应用情况,该生产线使用的生料辊磨、煤辊磨和水泥辊磨均由中材(天津)粉体技术装备有限公司提供。TRMR38.4型生料辊磨出磨生料细度80μm筛筛余<12%,水分≤0.5%。TRMC23.2型煤辊磨出磨煤粉80μm筛筛余≤8%,水分≤1.5%。TRMK50.4型四辊水泥辊磨生产的CEMII/A-L42.5R水泥比表面积≥400m^2/kg时,45μm筛筛余≤4%;生产的CEMII/B-L32.5R水泥比表面积≥420m^2/kg时,45μm筛筛余≤7%。各辊磨运行稳定,技术指标均满足设计要求。     

HRM22/28生料立磨技术改造浅谈

浙江衢州巨泰建材有限公司原有1条新型干法水泥熟料生产线,是由合肥水泥研究设计院设计的整条生产线,于2009年投料生产.现因原立磨规格产能较小委托我院总承包此次改造项目. 1原生料磨系统概括1．1改造前期方案确定该线原生料原料中参杂了约30％～50％电石渣代替石灰石,电石渣的特点是水分较大但易磨性很好,因此基本不需过多粉磨,通入热风烘干粉磨即可。原生料磨选用了合肥中亚建材装备的HRM22／28立磨,此立磨粉磨能力设计为100t／h,分离选粉能力设计为150t／h。     

ATOX52.5生料磨外排系统的改造

山东申丰水泥有限公司5000t/d熟料生产线,采用Φ4.8m×74m回转窑,NST-1型分解炉带双系列五级旋风预热器,生料磨采用ATOX52.5立磨,设计台时产量420t/h.该生产线于2006年9月份投产,现已达到设计产量.     

优化史密斯ATO X50立磨各项性能

<正>山东东华水泥有限公司公司有2条5 000t/d熟料生产线,原料粉磨系统采用的磨机都为丹麦史密斯同一配置ATOX50型磨机,配置功率为3 800k W,设计生产能力400t/h,负责供给熟料煅烧使用的生料。公司第一条熟料生产线建成投产于2004年底,为合理解决好原料磨运行状况,2007年我们生产部组织部分技术骨干成立了"原料磨稳定运行QC小组",有效的解决了原料磨生产中出现的磨振大、台时产量较低等问题。2008年,随着公司2号生产线投产运行,原料磨在实际生产运行控制中又暴露出其他的问题亟待解决。     

Preparation and properties of poly(Nε,Nε-dicarboxymethyl-l-lysine)

A new ampholytic homopolypeptide, $\text{poly}\text{(N}{}^{\mathrm{\epsilon }}\text{,N}{}^{\mathrm{\epsilon }}\text{-}\text{dicarboxy-methyl-}\text{l}\text{-lysine}\text{)}$, which has one tertiary amino and two carboxyl groups in the side chain has been derived from a hydrochloride salt of poly(L-lysine). The polymer in aqueous solution seems to be in the coil form with locally extended structure (LES) at neutral pH. In both the acidic and alkaline regions, the molar ellipticity of the polymer changes as a result of change in net charge on the side chain. The conformational changes may be from the coil with LES to other coiled forms. 5–7 M NaClO₄ and 80% aqueous methanol induce the α-helix in the polymer at neutral pH. Divalent cations, Cu²⁺ and Ca²⁺, do not induce any remarkably ordered structures such as α-helix or β-structure in the polymer in aqueous solution at any pH. Ultraviolet absorption studies show an absorption peak of the polymer-Cu²⁺ complex near 240 nm. Dependence of the peak intensity on pH at various q values ($\text{q =}\text{[}\text{Cu}{}^{\mathrm{2+}}\text{]}\text{[}\text{residue}\text{]}$) indicates the two steps of the complex formation. At q less than 0.64, the formation is described only with the first step. An average coordination number for Cu²⁺ at the first step was calculated to be about 2 by the method of Mandel and Leyte. The association constant of Cu²⁺ with the residue at the step was determined from the absorption data to be far smaller than that for the Cu²⁺-EDTA complex. The second step of the formation occurs in the case of large q but the absorption data for the second step cannot be obtained exactly due to precipitation.     

Wet Milling of Fe/Al/Al2O3 and Fe2O3/Al/Al2O3 Powder Mixtures

Wet milling of Al₂O₃-aluminide alloy (3A) precursor powders in acetone has been investigated by milling Fe/Al/Al₂O₃ and Fe₂O₃/Al/Al₂O₃ powder mixtures. The influence of the milling process on the physical and chemical properties of the milled powders has been studied. Particle refinement and homogenization were found not to play a dominant role, whereas plastic deformation of the metal particles leads to the formation of dislocations and a highly disarranged polycrystalline structure. Although no chemical reactions among the powder components in Fe₂O₃/Al/Al₂O₃ powder mixtures were observed, the formation of a nanocrystalline, ordered intermetallic FeAl phase in Fe/Al/Al₂O₃ powder mixtures caused by mechanical alloying was detected. Chemical reactions of Fe and Al particle surfaces with the atmosphere and the milling media lead to the formation of highly porous hydroxides on the particle surfaces. Hence the specific surface area of the powders increases, while the powder density decreases during milling. The fraction of Fe oxidized during milling was determined to be 0.13. The fraction of Al oxidized during milling strongly depends on the metal content of the powder mixture. It ranges between 0.4 and 0.8.     

Sintering of Si3N4-Y2O3-Al2O3

Sintering kinetics of the system Si₃N4-Y2O₃-Al₂O3 were determined from measurements of the linear shrinkage of pressed disks sintered isothermally at 1500° to 1700°C. Amorphous and crystalline Si₃N₄ were studied with additions of 4 to 17 wt% Y₂O₃ and 4 wt% A1₂O₃. Sintering occurs by a liquid-phase mechanism in which the kinetics exhibit the three stages predicted by Kingery's model. However, the rates during the second stage of the process are higher for all compositions than predicted by the model. X-ray data show the presence of several transient phases which, with sufficient heating, disappear leaving mixtures of β ' -Si₃N₄ and glass or β '-Si₃N₄, α '-Si₃N₄, and glass. The compositions and amounts of the residual glassy phases are estimated.     

Participation of lewis base on vinyl chloride polymerization with Al(C2H5)3CCl4 catalyst system

The polymerization of vinyl chloride has been investigated using an $\text{Al}\text{(}\text{C}{}_2\text{H}{}_5\text{)}{}_3\text{CCl}{}_4$ catalyst system in the presence of various Lewis bases. Effective Lewis bases are γ-butyrolactone, diglyme and diethylenetriamine which are multidentate. The rate of polymerization is dependent not only on the basicity of the Lewis base used but also on a coordination number of one. The latter is the predominant factor. For the effect of polymeric amines, a tentative hypothesis is discussed.     

Synthesis and Characterization of Ti0.33Ta0.33Nb0.33C and Ti0.33Ta0.33Nb0.33CxN1-x Whiskers

Ta_0.33Ti_0.33Nb_0.33C and Ta_0.33Ti_0.33Nb_0.33C _x N_{1− x} whiskers were synthesized via a carbothermal vapor-liquid-solid growth mechanism in the temperature range 900°-1450°C in Ar or N₂. The optimum temperature was 1250°C. Whiskers were obtained in a yield of 70-90 vol%. The whiskers were 0.5–1 µm in diameter and 10–30 µm in length. The starting materials that produced the highest whisker yield were: TiO₂, Ta₂O₅, Nb₂O₅, C, Ni, and NaCl. C was added to reduce the oxides, and Ni to catalyze whisker growth. NaCl was used as a source of Cl for vapor-phase transportation of Ta and Nb oxochlorides and Ti chlorides to the catalyst. The catalyst metal was recycled several times during the synthesis and was transported as NiCl₂( g ) according to thermodynamic calculations. The rate of formation and the chemical composition of the whiskers depended on the synthesis temperature, the choice of catalyst, and the atmosphere. At low temperatures, the whiskers were enriched in Nb and Ta, whereas the Ti content increased with increased synthesis temperature.