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底吹     
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  bottom blowing
     Metallurgical Character of Bottom Blowing CO_2-N_2 Gas in Combined-Blown Converter
     顶底复吹转炉底吹CO_2-N_2的冶金特性
短句来源
     The top-bottom blown parameters for the 85 t converter at Chongqing Steel has been established that in primary phase of melting the top lance level is(1()600)~(1()760) mm and the bottom blowing flowrate is 240~350(m~3/h);
     建立了重钢85 t转炉复吹工艺参数:冶炼前期顶枪枪位为1 600~1 760 mm,底吹流量240~350 m3/h;
短句来源
     Results show that the best results for molten bath stirring are achieved when six-nozzle oxygen lances are selected with included angle being ~17.5° , top blow rate ~30 000 m3/h, bottom blow rate 540 m3/h and the bottom blowing tuyeres being arranged at ~0.52 D and lance position ~1.7 m .
     结果表明,选用6 孔,倾角17.5°氧枪,底枪布置在0.52 D圆上,枪位1.7 m,顶吹流量为υ氧气,n=30 000 m3/h,底吹流量为υ氧气,n=540 m3/h时,熔池搅拌效果最好。
短句来源
     Test of laboratory and production was done Results show that starting pressure of bottom blowing Argon was 0 30~1 00 MPa,working pressure was 0 20~0 60 MPa,time of blowing Argon was 3 minutes up 20 mm diameter rod of 20MnSi steel was produced by this process Its tensile strength was 3 72 MPa up,other mechanical performance was analogous to top blowing Argon steel
     进行了实验室模拟试验及现场生产试验,结果表明:钢包底吹氩时,吹氩启动压力一般为0.30~1.00MPa,工作压力一般为0.20~0.60MPa,吹氩时间>3min。 按此吹氩工艺参数生产的20MnSi20mm螺纹钢材,其抗拉强度提高了3.72MPa,其它力学性能指标与顶吹氩钢相近
短句来源
     With increasing ladle bottom blowing argon pressure from 0.3 MPa to 0.6~1.0 MPa,modified original blowing argon procedure-soft blowing argon after Ar stirring for 1 min and total blowing argon for 3 min to improved blowing argon procedure-soft blowing argon after Ar stirring for 3 min and total blowing argon for more than 6 min,and improving baking process for tundish to decrease inclusion MgO,the cold upsetting crack of steel for rivet was effectively avoided.
     通过将钢包底吹氩压力由0.3 MPa提高到0.6~1.0 MPa,并由原工艺吹氩1 min后软吹氩、总吹氩时间为3 min改为吹氩3 min后软吹氩、保证总吹氩时间≥6 min,同时改进中间包烘烤工艺减少MgO夹杂,从而有效地避免了铆螺钢冷镦时的开裂现象。
短句来源
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  bottom stirring
     A simulation test for combined blowung with bottom stirring gases of CO_2、N_2 and CO_2+N_2 in induction furnace shows that N_2 behavior in the bath, will be influenced by kinds of bottom stirring gas、decarburizing rate and oxidizing property of molten steel;
     在感应炉上进行的底吹CO_2、N_2、CO_2+N_2的复吹模拟实验研究表明,熔池中氮的行为受底吹气体性质、脱碳速度和钢液氧化性的影响;
短句来源
     Control Principle of a Imported Bottom Stirring in 120 t Ladle Furnace
     120tLF精炼炉进口底吹搅拌系统的控制原理
短句来源
     the characteristics of homogenuous mixture and refining reac-tion after bottom stirring theoretically analysed;
     从理论上分析了底吹搅拌后均匀混合特性和精炼反应特性,简述了实际电炉底吹后的搅拌效果。
短句来源
     The slag in snorkel is eliminated in 2 min at 20 mm of sinking depth of snorkel and over 0.27 m 3/h of flow rate of bottom stirring.
     当模拟浸罩深度为20mm,底吹气体流量大于0.27m3/h时,可在2min内将浸罩内熔渣排除干净。
短句来源
     Experimental Study on Slag Elimination by Bottom Stirring in CAS-OB Ladle
     CAS-OB钢包底吹排渣效果的实验研究
短句来源
更多       
  bottom-blowing
     MODELLING, ANALYSIS OF ARGON BOTTOM-BLOWING SYSTEM AND INTELLIGENT CONTROL
     底吹氩气系统的建模、分析与智能控制
短句来源
     The bottom-blowing experiment with CO2, N2, CO2+N2 and CO2+Ar in 60kg combined blown converter has been conducted. By comparing each experimental results, the metallurgical character of bottom blowing different gas is studied.
     在60kg顶底复吹转炉上进行了底吹CO_2、N_2、CO_2+N_2、CO_2+Ar_4种气体的实验,通过比较不同底吹气体的实验结果,对复吹转炉底吹不同性质气体的冶金特性进行了研究。
短句来源
     BLOWING PRE-TREATED HOT METAL CONTAINING 3% P IN OXYGEN BOTTOM-BLOWING CONVERTER WITH LIME POWDER INJECTION
     底吹氧气转炉喷粉冶炼含3%P高磷半钢
短句来源
     Practice of Ladle Bottom-blowing Argon Process
     钢包底吹氩工艺的实践
短句来源
     The nitrogen content of steel w(N) before and after LF refining furnace treatment were measured under different bottom-blowing conditions.
     通过试验测量了不同底吹工艺条件下转炉钢水及经过LF炉处理后钢水的w(N)。
短句来源
更多       
  bottom-blown
     Slags of high Nb_2O_5, low P_2O_5, high Nb/p ratio and low FeO content have been obtained from hotmetal containing Nb and P in 300kg, 3 and 5 ton experimental oxygen bottom-blown converters.
     含铌和磷铁水在300kg和3t及5t氧气底吹转炉中进行提铌试验,获得了Nb_2O_5高,P_2O_5低,(Nb)/(P)高以及FeO低的铌渣。
短句来源
     METALLURGICAL REACTION IN Q-BOP, BOTTOM-BLOWN LD, ARGON-STIRRED LD AND LD
     在Q-BOP法,底吹LD法,氩气搅拌LD法和LD法中的冶金反应
短句来源
     Experimental Study on Characteristics of Uniform Mixing in Bottom-Blown Electric Arc Furnace
     底吹电弧炉均匀混合特性的实验研究
短句来源
     DEVELOPMENT OF BOTTOM-BLOWN OXYGEN CONVERTERS
     氧气底吹转炉的发展
短句来源
     The new technology of intensifying liquid steel agitation by bottom-blown gas in steelma-king process of the electric arc furnace is an effective method of decreasing its energy consumption.
     在电弧炉炼钢过程中采用底吹气体搅拌钢液的新工艺,是降低能耗的有效方法。
短句来源
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  bottom blowing
Bottom Blowing Tuyeres for 175-Ton Steel Ladles in Service at an Open-Hearth Furnace Shop (MISW JSC)
      
Measures have been developed OAO ZSMK for bottom blowing of metal in steel casting ladles of acid converter workshop No.
      
The agreement between measurements and predictions was quite good for a variety of blowing arrangements which included top blowing with pure oxygen or air and bottom blowing with air.
      
Mass transfer coefficient KBa for bottom blowing was found to be almost double that for top blowing.
      
Dimensional analysis was used to express the volume of lower liquid carried up into the emulsionper bubble, thereby allowing better estimates of the droplet birth rate in a practical emulsification process induced by bottom blowing.
      
更多          
  bottom-blowing
Using the DVS system for the bottom-blowing of steel in the electric steelmaking shop at the Moldavian Metallurgical Plant
      
The kinetics of the gasification process have been investigated by analyzing and assessing the basic reactions for a bottom-blowing MIP reactor.
      
Turbulence structure of bottom-blowing bubbling jet in a molten Wood's metal bath
      
  bottom-blown
Assessment of steelmaking techniques, both new and old, indicates that the basic oxygen process, whether it be top-, side-or bottom-blown, or even continuous, will dominate the steelmaking scene until the end of this century.
      
A water model study of bottom-blown oxygen steelmaking processes
      
Investigations were carried out in a water model of bottom-blown oxygen steelmaking processes like OBM/Q-BOP to understand certain aspects of the dynamics of these processes.
      
Air was used to simulate the gases blown into the bottom-blown converters.
      
Split air injection, with 30 pct air injected into the annulus from the top and 70 pct air injected into the draft tube from the bottom, lowers the critical air velocity for particle suspension by 37 pct, with respect to bottom-blown Pachuca tanks.
      
更多          
  其他


Experimental work on oxygen steelmaking in a 5 ton bottom blown converter is described, both with and without lime powder injection. With lime powder injection, decarburization and dephosphorization take place simultaneously. The metal has a higher residual manganese. Desulphurization efficiency is higher and FeO content in the slag lower than in the BOF process, under similar conditions of temperature and slag composition. In addition, a higher oxygen flow rate is allowable in the bottom-blown process.

本文叙述首钢5吨底吹氧气转炉喷石灰粉吹炼低磷铁的工艺,分析其冶金效果.底吹氧气转炉喷石灰粉炼钢,具有脱碳、脱磷同时进行和较顶吹氧气转炉有较高的余锰含量、更高的脱硫效率、更大的供氧强度和较低的渣中(FeO)含量等冶金优点.由顶吹氧气转炉炉身改造的5吨底吹氧气转炉,已取得与同车间同吨位顶吹氧气转炉相当的炉令.载粉吹氧的氧枪单位消耗为1.65毫米/炉.钢铁料消耗为1126公斤/吨钢,金属收得率为92.5%,比顶吹高2%.底吹氧气转炉喷石灰粉炼钢,因供氧方式影响了氧化机理、反应速度和反应接近平衡的程度,所以与不喷粉的底吹氧气转炉炼钢,以及顶吹氧气转炉炼钢有不同的冶金特性.

Bottom-blown converters have many tuyeres at bottom to blow in oxygen, and at the same time to inject lime powder through the tuyere with oxygen. Thus, they have advantages such as: quiet blowing, high metal yields, outstanding desulfurization and dephosphorization, intense mixing of the bath resulting in rapid carbon removal to very low levels. Since the installation of the first production unit to date, the new steelmaking process has reached an installed capacity of 35 million T/y, and new progress has been...

Bottom-blown converters have many tuyeres at bottom to blow in oxygen, and at the same time to inject lime powder through the tuyere with oxygen. Thus, they have advantages such as: quiet blowing, high metal yields, outstanding desulfurization and dephosphorization, intense mixing of the bath resulting in rapid carbon removal to very low levels. Since the installation of the first production unit to date, the new steelmaking process has reached an installed capacity of 35 million T/y, and new progress has been made in technology by Q-BOP/OBM. For example, at the Kawasaki Chiba works, gas recovery for Q-BOP is 125.5 Nm~3/T. The life of furnace lining for one campaign is 3150 heats and bottom life for one campaign 1646 heats. Turn-down performance of existing Q-BOP facilities is 96.1%. All these major advantages will certainly bring bottom-blown oxygen converter process a very bright future.

氧气底吹转炉的主要特点是在炉底多氧枪供氧,同时可以随氧流喷入石灰粉.因此它具有以下特点:吹炼平稳、金属收得率高;脱磷、脱硫好,熔池搅拌好,易于冶炼低碳钢.从氧气底吹转炉第一座设备投产到现在已有3500万吨的生产能力,而且在Q-BOP/OBM的技术上取得新的进展.例如日本川崎千叶厂,O-BOP的煤气回收率达125.5标米~3/吨,炉体寿命达到3150炉,炉底寿命1646炉,Q-BOP转炉终点命中率达到96.1%.这些将给氧气底吹转炉的发展指出光明的前景.

Rare-earth nodular iron uses the rich home sources of rare-earth elements as nodulizing agent instead of the mainly imported magnesium. Factories can use directly the rare-earth ferrosilicon No.1 of the Baotou Steel Plant to produce nodular iron without having to remelt the rare-earth-magnesium alloy. The spheroidization is reliable because of the application of a new nodulizing technique-blowing N_2 through the bottom of the ladle. (By this method desulfurization, nodulization and inoculation can be done continuously....

Rare-earth nodular iron uses the rich home sources of rare-earth elements as nodulizing agent instead of the mainly imported magnesium. Factories can use directly the rare-earth ferrosilicon No.1 of the Baotou Steel Plant to produce nodular iron without having to remelt the rare-earth-magnesium alloy. The spheroidization is reliable because of the application of a new nodulizing technique-blowing N_2 through the bottom of the ladle. (By this method desulfurization, nodulization and inoculation can be done continuously. The pick-up of rare-earth is good, and the working conditions for the workers improved). In addition, a method for controlling accurately the residual rare-earth amount is develped. In consequence th(?) nodulizing effect is reliable, the mechanical properties of the iron are excellent, the wear resistance is better than that of iron containing Mg, and the tendency to form under-skin holes is lower than in the case of iron containing Mg. The perfectness of sphericity and the homogeneity of eize of the nodules seem to be rather poor.

无镁稀土球墨铸铁采用国内资源丰富的稀土作球化剂,完全不用主要靠进口的镁,工厂可直接用包钢一号稀土硅铁合金生产球铁,不需自行熔制稀土镁合金.由于采用了新的球化处理工艺——包底吹氮气法(此法可连续完成脱硫、球化与孕育处理.稀土吸收率高,劳动条件好),同时还试成了炉前准确控制残留稀土量的方法,因而球化稳定,机械性能良好;耐磨性比含镁球铁更佳;皮下气孔倾向比含镁球铁小.但大断面中石墨球的圆整度和大小均匀性似乎稍差.

 
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