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secondary cooling water     
相关语句
  二冷水
     While a flux containing high fluorine was used, the increased F- concentration in the secondary cooling water reached at 24.3~57.9mg/L, and the water behaved in acidity.
     使用高氟保护渣,二冷水中F-浓度增幅为24.3~57.9 mg/L,水样呈酸性。
短句来源
     The results showed that, when a flux with low fluorine content was used in Plant A, the increase of F~- concentration in the secondary cooling water was 1.2~24.3 mg·L~ -1 , and the water behaved in neutrality.
     研究结果表明,A厂使用低氟保护渣,二冷水中F-质量浓度增幅为1·2~24·3mg·L-1,水样呈中性;
短句来源
     When the fluxes with low fluorine contents used in plant, the increased F- concentration in secondary cooling water was 1.2mg/L, the water behaved in neutrality.
     使用低氟保护渣,二冷水中F-浓度增幅为1.2 mg/L,水样呈中性;
短句来源
     While in Plant B, a flux containing high fluorine was used, the increase of F~- concentration in the secondary cooling water reached at 57.9mg·L~ -1 , and the water behaved in acidity.
     B厂使用高氟保护渣,二冷水中F-质量浓度增幅为57·9mg·L-1,水样呈酸性.
短句来源
     DISCUSSION ABOUT DYNAMIC CONTROL OF SECONDARY COOLING WATER IN BILLET CASTER
     小方坯连铸机实现二冷水动态控制之探讨
短句来源
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  二冷配水
     Process Optimization of the Secondary Cooling Water for No.1 CCM at Meishan
     梅山1号连铸机二冷配水工艺优化
短句来源
     Effect of Secondary Cooling Water Rate on Concasting Slab Quality of 304 Stainless Steel
     二冷配水对304不锈钢连铸板坯质量的影响
短句来源
     Application of secondary cooling water model in rectangular bloom caster
     二冷配水模型在矩形坯连铸机上的应用
短句来源
     Optimization of control model for adjusting secondary cooling water rate on continuous casting machine
     连铸二冷配水比例调节控制模型优化
短句来源
     A two - dimension unsteady heat transfer model has been used to analyse the influence of superheat and secondary cooling water distribution on the internal quality of billet.
     以小方坯二维非稳态传热模型为工具,分析过热度和二冷配水制度对连铸坯内部质量的影响。
短句来源
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  二次冷却水
     Control of Water Rate for Secondary Cooling Water of Concaster
     连铸机二次冷却水的比水量控制
短句来源
     Advantage Analysis of Mathematical Model Control over CC Secondary Cooling Water
     连铸二次冷却水数模控制的优势分析
短句来源
     Design of Secondary Cooling Water System for China Advanced Research Reactor
     CARR堆二次冷却水系统设计
短句来源
     The function of the secondary cooling water system of China Advanced Research Reactor is to transmit the heat of systems,such as coolant system,to the final heat sink.
     中国先进研究堆二次冷却水系统的功能是将反应堆冷却剂等系统中的热量传输给最终热阱。
短句来源
     2. If the closed-loop soft water cooling system is of water-water cooling mode, then secondary cooling water must be made up, which will cause running cost higher.
     (2) 采用水/水冷却的软水密闭冷却循环方式,必须增加二次冷却水,运行费用较高。
短句来源
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  配水
     Secondary cooling water auto-control of 220×1600mm slab con-caster of JISCO
     酒钢220mm×1600mm板坯连铸机二次冷却自动配水控制
     Last, inducting the network, we use the integrated system SCAN3000/S9100e of Honeywell Company to achieve the remote control of the secondary cooling water.
     最后,引入网络概念,选用美国Honeywell公司的SCAN3000/S9100e集控系统,实现连铸二次冷却配水的远程控制。
短句来源
     Process Optimization of the Secondary Cooling Water for No.1 CCM at Meishan
     梅山1号连铸机二冷配水工艺优化
短句来源
     Effect of Secondary Cooling Water Rate on Concasting Slab Quality of 304 Stainless Steel
     二冷配水对304不锈钢连铸板坯质量的影响
短句来源
     Application of secondary cooling water model in rectangular bloom caster
     二冷配水模型在矩形坯连铸机上的应用
短句来源
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      secondary cooling water
    The obtained values are in good agreement with literature and clearly reflect the widely different boundary conditions associated with primary cooling (contact with the mold) and secondary cooling (water jet).
          
    The design of such a process is presented for a large cooling reservoir receiving a discharge of 1091-1 d-1 of secondary cooling water containing 100 μg 1-1 of available P and 400 μg 1-1 of available N.
          
    The secondary cooling water from the Savannah River was returned to the river through the Site streams.
          
    The basin purge water was discharged to the Site streams along with the secondary cooling water.
          


    The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface...

    The present work shows that the nonuniform thickness of solidified skin of slab created by the nonuniform cooling rate of the skin in the crystallizer is main cause for slab surface cracking.The nonuniform distribution of the melted protective slag layer between the slab and the crystallizer generated heat conduction difference at the slab surface, then cooling rate in the slab surface became different. When a part of skin surface separates first from the mold, the difference of cooling rate in slab surface was enlarged. If this separated part of skin can keep close back to the mold as soon as possible, the difference of cooling rate in slab surface may be reduced, then no crack appears. Control of the primary cooling water can make the slow cooling zone small and also the tensile strain small, hence the cracking may be avoided.The stress required for producing internal crack decreases since there are loci of cracks in the slab caused by the surface crack, so the longitudinal cracks from inner to surface form easily. The extremely large temperature difference between the skin surface and inner layer caused by direct secondary cooling water generates very severe thermal stress, in tnis case the internal cracks form more ceasily. This thermal stress in the thinner part of skin appears more severe, therefore increasing the atomization covering area of the nozzle is an effective measure for avoiding internal cracks.

    试验结果得知,坯壳在结晶器内冷却不均,使坯壳凝固层厚薄不同,是铸坯产生表面裂纹的主要原因。结晶器内,熔融的保护渣层分布不均,使铸坯表面热传导有所差异,而引起铸坯表面冷却不均,使局部坯壳首先脱离结晶器壁。结果更扩大了铸坯表面冷却速度差异的程度。坯壳局部区域脱离结晶器壁后,若能及时复贴结晶器壁,可改善铸坯表面冷却不均的现象,从而避免裂纹的出现。控制—冷区用水量以达到缓冷,使凝固缓慢区变小,拉伸应变也随之而小,亦可避免裂纹产生。由于铸坯表面裂纹形成的裂纹灶,降低了产生内裂所需要的应力值,易于形成内、外相连的纵裂。同时二次冷却水对刚出结晶器的铸坯进行直接冷却,坯壳表面温度急速下降,致使坯壳内层遭受到很大的热应力,易于引起坯壳产生内裂。这种热应力在坯壳较薄处更为明显。因而增加喷嘴雾化复盖面;对减少内裂是有效的措施。

    A thermal transfer mathematical model on the solidification of stain- less steel slabs has been developed; effects of process parameters on the solidification of slabs in the mould and in the secondary cooling zone analysed; and the optimum cooling pattern established based on the chara cteristics of concasters through tests. The calculation formula on the volume of secondary cooling water has been derived, and profile of process para- meters drawn from the enormous calculated datum. Tests indicate that...

    A thermal transfer mathematical model on the solidification of stain- less steel slabs has been developed; effects of process parameters on the solidification of slabs in the mould and in the secondary cooling zone analysed; and the optimum cooling pattern established based on the chara cteristics of concasters through tests. The calculation formula on the volume of secondary cooling water has been derived, and profile of process para- meters drawn from the enormous calculated datum. Tests indicate that vol- ume of water supply in each cooling zone is basically in agreement with that shown on the water meter provided by VOEST.

    根据板坯连铸机的特点,建立了不锈钢板坯凝固传热数学模型;分析了工艺参数对结晶器和二冷区铸坯凝固的影响;确立了不锈钢二冷区最佳冷却冶金准则。经过大量计算,总结出二冷水量的计算公式和操作工艺参数图。由本模型计算的二冷各段水量与奥钢联提供的水表值基本接近。

    n the basis of the mathematical model for the non steady state two dimensional heat transfer a control model for calculating the secondary cooling water distribution was established with the control over the surface temperature of the objective as the guide.A comparison made to three different real time control patterns at the secondary cooling zone shows that backfeed control on the surface tem-perature of the casting temperature forward is more benefitial to the stabilization of the surface...

    n the basis of the mathematical model for the non steady state two dimensional heat transfer a control model for calculating the secondary cooling water distribution was established with the control over the surface temperature of the objective as the guide.A comparison made to three different real time control patterns at the secondary cooling zone shows that backfeed control on the surface tem-perature of the casting temperature forward is more benefitial to the stabilization of the surface tem-perature and improvement in the slab quality.

    应用二维非稳态传热数学模型,以目标表面温度控制为指导,建立板坯连铸机二冷配水计算模型,比较了二冷区三种实时控制度式,指出浇注温度前馈的表面温度反馈控制更有利于稳定铸坯表面温度分布和改善铸坯质量。

     
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