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《武钢技术》2009,(3):59-59
新型轧辊磨削在线消磁装置涉及有伤轧辊修复装置。其解决目前磨削与消磁不同步等不足。技术措施:其主要由磨床体(1)、计算机(2)、磨床体(1)上的测量臂(3)及冷却器(4)、头架皮带轮(5)、头架箱体(6)、拖板(7)、探头(8)、清洁器(9)、砂轮(10)、伺服器(11)上的测距传感器(12)、凸块(13)、识别传感器(14)及头架面板(15)、标示牌(16)、孔条(17)组成,其在由测辊形仪(18)及探伤探头(19)组成的探头(上)设线圈式消磁装置(20),在线圈式消磁装置(20)与电源(21)之问的导线(22)上连接变频器(23),测磁装置(24)与探伤探头(19)邻接,线圈式消磁装置(20)通过导线(22)与计算机(2)连接。本装置为轧辊磨削与消磁同步进行,能缩短轧辊磨削时间、提高轧辊磨床的工作效率和自动化程度。 相似文献
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利用差热与热重分析、变温红外光谱、X射线粉末衍射以及溶解性实验等手段详细地研究了未见报道的K_7H_6[Ln(W_(10)V_2O_(39))_2]·mH_2O(简记为Ln(W_(10)V_2),Ln=La ̄(3+)、Ce ̄(3+)、Pr ̄(3+)、Nd ̄(3+)、Sm ̄(3-)、Eu ̄(3-)、Gd ̄(3-)、Dy ̄(3-)、Yb ̄(3-),以下同)、K_(10)H_5[Ln(W_(10)VO_(37))_2]·mH_2O[简记Ln(W_(10)V)_(22)、K_(10)H_7[Ln(W_9V_2O_(39))_2]·mH_2O[Ln(W_9V_2)_2]、K_9LnMo_6V_6O_(39)·mH_2O[LnMo_6V_6]、K_(10)LnMo_5V_7O_(39)·mH_2O[LnMo_5V_7]和k_(13)H_2[Ln(SiW_(10)VO_(39))_2]·mH_2O[Ln(SiW_(10)V)_2]_6个系列50多种含钒镧系元素杂多配合物的热解性质,确定它们的分解温度分别为:Ln(SiW_(10)V)_2,450~500℃;Ln(W_(10)V_2)_2、Ln(W_(10)V)_2、Ln( 相似文献
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合成了9个二安替比林苯基甲烷含氧衍生物:二安替比林-(2-羟基)苯基甲烷(DAOHM)、二安替比林-(3-羟基)苯基甲烷(DAmHM)、二安替比林-(4-羟基)苯基甲烷(DApHM)、二安替比林-(2,4-二羟基)苯基甲烷(DADHM)、二安替比林-(2-甲氧基)苯基甲烷(DAoMM)、二安替比林-(4-甲氧基)苯基甲烷(DApMM)、二安替比林-(3,4-二甲氧基)苯基甲烷(DADMM)、二安替比林-(2-羟基-3-甲氧基)苯基甲烷(DAHMM)、二安替比林-(3-甲氧基4-羟基)苯基甲烷(DAMHM) 相似文献
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一、什么是大营销理念
1.大营销理念的内涵1986年科特勒存4P(产品(Product)、价格(Price)、渠道(Place)、促销(Proinotion))古典营销理论的基础上增加政治权力(Policy Power)、公共关系(Public Relation)两个维度,初步形成6Ps组合的“大营销”概念。后来又增加战略4P,即探查(Probing)、划分(Partitioning)、 相似文献
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The extraction of RE(Ⅲ) (RE=La, Nd, Sm, Gd) in sulfuric acid medium using the mixture of HDEHP(H2B2) and HEH/EHP(H2L2) was investigated. The synergistic enhancement coefficient(R) was calculated for La (1.96), Nd(3.52), Sm(5.96), and Gd(5.71), respectively, at pH=2.0, and it was seen that the R increased with the increase of aqueous quilibrium pH. The configuration of the extracted complexes was considered to be RE(SOa)xH2x(HB2)3 with HDEHP, RE(SOa)xH2x(HL2)3 with HEH/EHP, and RE(HB2)2(HL2) with their mixture as the extractant with the slope method. The equilibrium constants and stability constants were calculated. A cation exchange mechanism was proposed as well. 相似文献
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The pH dependent sorption of rare earth ions (La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ), Nd(Ⅲ), Y(Ⅲ), Sm(Ⅲ), Eu(Ⅲ), Gd(Ⅲ), Tb(Ⅲ), Dy(Ⅲ), Ho(Ⅲ), Er(Ⅲ), Lu(Ⅲ), and Yb(Ⅲ)) from HAC-NaAC buffer solution at 298 K by D152 resin containing -COOH function groups were presented. The sorption behaviors of D152 resin for Sm(Ⅲ) were discussed as an example. The effects of operational conditions such as pH, temperature, and contact time were studied. The statically saturated sorption capacity was 510 mg/g resin at pH 6.70 in HAc-NaAc medium at 298 K. The sorption behaviors obeyed the Freundlich isotherm. The capacity value for column study was obtained by graphical integration as 495 mg/g resin. Thomas model was applied to experimental data to predict the breakthrough curve and to determine the characteristic parameters of the column useful for process design. 相似文献
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本文简要论述了冶金发射光谱分析的最新进展。全文主要包括:(1)光导纤维的应用;(2)软件的发展;(3)光谱仪的自动化;(4)液钢分析;(5)痕量分析;(6)状态分析;(7)展望。 相似文献
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本文采用固相反应法合成了一系列掺Ce ̄(3+)、Tb ̄(3+)的四硼酸铝钇(Y_(1-x-y)Ce_xTb_yAl(BO_3)_4)磷光体。测定了它们的结构、属于三方晶系、空间群R_(32)、Ln ̄(3+)离子处于六个氧形成的三棱柱中。测定了磷光体中Ce ̄(3+)、Tb ̄(3+)和Ce ̄(3+)-Tb ̄(3+)共掺时的光谱,观察到Ce ̄(3+)、的Stokes位移相当小(~1700cm ̄(-1))、Tb ̄(3+)的能级劈裂较明显和Ce ̄(3+)能将能量传递给Tb ̄(3+),测定了磷光体中Ce ̄(3+)、的荧光寿命,探讨了Ce ̄(3+)-Ce ̄(3+)之间的能量传递。 相似文献
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施毅敏 《金属材料与冶金工程》2009,37(6):10-13
利用基于密度泛函理论(DFT)的广义梯度近似(GGA)研究了320GPa高压下钠的电子结构和光学性质.给出了其沿布里渊区高对称轴的能带结构、态密度(DOS)和分态密度(PDOS)。并计算了介电函数ε(ω),反射率R(ω),能量损失函数L(ω),光吸收系数I(ω),光导率σ(ω),折射率n(ω),以及消光系数k(ω),用以讨论高压下钠的光学性质。 相似文献
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发明专利《一种高清洁高碳铬轴承钢的生产方法(专利号:ZL200410025102.5)》用于冶金行业高碳铬轴承钢的生产,其特征是采用五步法流程:(1)精选配料(2)≥30吨电炉初炼钢液(a)熔化炉料(b)流出泡沫渣,添加石灰(c)出钢量92%;出钢时合金化,程度〉90%(3)钢包炉精炼钢液(a)清洁钢包,炉洗(b)全程底吹氩搅拌,时间60min,前期吹氩强度0.4MPa,后期0.3MPa;物料加入量≤8Kg/吨钢(c)两步喂铝法沉淀脱氧;向渣面加结晶硅粉、萤石(含氟化钙≥98%)的扩散脱氧(4)真空炉处理(a)真空度≤140Pa, 相似文献
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杨天林 《有色金属(冶炼部分)》1994,(6)
以正辛烷为稀释剂,采用上升液滴法研究了在硝酸盐体系中P_(307)萃取锌(Ⅱ)的动力学。条件试验表明,该萃取过程受反应Zn(Ⅱ)A·HA ̄(+)+2H_2A_2(。)Zn(Ⅱ)A_2·2HA_(。)+2HA(1)+H ̄+控制,萃取速率可表示为:R=k'(Zn(Ⅱ)[H2A_2) ̄2(。)/k_2[H ̄+]+k_8[H_2A_2] ̄2(o),在298K时测得表观速率常数K值为10 ̄(-6.67)dm ̄(-2)s ̄(-1)mol ̄(-1)。萃取速率随温度上升而加快,试验条件下此反应的表观活化能为7.08KJ·mol ̄(-1)。 相似文献
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偶氮溴膦-PSN直接测定钢铁中稀土总量 总被引:2,自引:0,他引:2
,V(Ⅴ)(2.5),W(Ⅵ)(2),Zr(Ⅳ)(0.07),Zn2+(3),Fe3+(15),EDTA(200),酒石酸(750),SO(90),草酸(25)。(*Nb含量高时加1ml20%酒石酸掩蔽;加0.5ml5%苯羟乙酸和2滴30%过氧化氢掩蔽)。2.5工作曲线于50ml容量瓶中,加10ml盐酸(1+3),用水稀至刻度,摇匀。分取5ml数份各置于25ml容量瓶中,并分别加入0~20μg铈,加2ml偶氮溴膦-PSN,以下按实验方法测量吸光度。3样品分析称取0.1g试样置于100ml锥形瓶中,加5ml 相似文献
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The polymerization of dimethylaminoethyl methacrylate (DMAEMA) catalyzed by the 1-cyclopentylindenyl lanthanide (Ⅱ) complex (1-C5H9C9H6)2Yb (THF)2 was investigated. The results indicated that the complex (1- C5H9C9H6)2Yb (THF)2 as a single component catalyst showed high activity. The conversion of the polymerization and the molecular weight of the polymer were affected by temperature, time, amount of catalyst and solvent in the polymerization process. The catalytic activity of (1-C5H9C9H6)2Yb (THF)2 enhanced significantly when a small amount of polar solvent THF was added into the polymerization system in which toluene was selected as the solvent. The optimal temperature of polymerization was about 0 ℃. Other modified substituted indenyl lanthanide (Ⅱ) complexes also showed good catalytic activity. The order of catalytic activity of the complexes was as follows: (1-C5H9C9H6)2Sm(THF)≈ (1- C2 H5 C9H6 )2 Sm(THF)2 〉 (1 -C5 H9 C9 H6 )2 Yb(THF)2 〉 (1 -PhCH2 C9 H6 )2 Sm(THF)2. The steric regularity of p oly (dimeth- ylaminoethyl methacrylate) (PDM AEM A) was characterized by 1H NM R spectra. The polymerization provided syndio- tacticity-rich PDM AEM A. The molecular weight and the molecular weight distribution of PDM AEM A were measured by gel permeation chromatography. 相似文献