查询词典 hot metal

Finally, according to the various properties of the optimization algorithms, the optimization algorithms have been applied to predicting the silicon content of hot metal and to optimizing the operation parameters of the blast furnace to meet the need of the higher hot metal output and the lower coke rate. Major research work in this paper includes:(1) Based on the study of the statistic property of the Logistic chaos map, the author has proposed the nested intervals chaos search method which improves the ergodicity of the chaos search by searching the area once more where the probability distribution is small.

高炉炼铁生产是一个复杂的非线性过程，高炉生产操作参数的优化涉及优化模型的建立、多目标优化、约束条件的检验等多个问题，对于这么一个复杂的优化问题，传统、单一的优化方法已存在局限性，因此本文研究了两种新型的具有不同特点的优化方法：基于混沌理论的优化方法和基于人工免疫理论的优化方法，并设计了几种混合优化方法。

In this article, by comparative research of the basic principles, agents, methods and effects of the hot metal pretreatments of desiliconization, dephosphorization and desulphurization, the writer defines that the converter-shaped pretreatment of desiliconization, dephosphorization and desulphurization has become the key pretreatment technique of the hot metal for its fine effect, low cost, and outstanding economic and environmentally friendly advantages.

本文通过对铁水预脱硅、脱磷、脱硫基本原理、预处理剂、预处理方法和处理效果的比较研究，明确了转炉型&三脱&工艺因其效果好，成本低和突出的经济、环保优势成为铁水&三脱&预处理的主流工艺。

Some factors to influence the silicon content of hot metal were proposed on the basis of the experiment in the lab: increasing the binary basicity is favorable to desiliconization; the oxide in slag debases the silicon activity and is of great advantage to desiliconization; Al2O3 and SiO2 are disadvantageous to desiliconization, the volatilization content of SiO2 in coke increases with increasing smelting temperature, leading to increase the silicon content of hot metal; the silicon content of hot metal increases with increasing the drip zone's altitude.

在实验室进行了降低铁水中硅含量的实验，得到了铁水中硅含量的影响因素：提高二元碱度有利于降硅；增加渣中氧化物可降低SiO2的活度有利于降硅；Al2O3和SiO2不利于降硅；冶炼时焦炭中SiO2的挥发量随温度的升高而增多，使铁水中硅含量增加；随着滴落带高度的增加，铁水中硅含量不断增加。

The optimal order of hot metal pretreatment is obtained by comparing different powder and order with thermodynamic computation, that is hot metal desulphurization→desiliconization and dephosphorization.

北京科技大学冶金与生态工程学院，北京100083）摘要：通过对不同三脱剂、不同处理顺序的热力学计算比较得出最佳铁水预处理顺序为：预处理脱硫－预处理脱硅、脱磷。

The hot metal pretreatment mode is confirmed as: hot metal － desulphurization by KR in ladle—desiliconization and dephosphorization in converter.

铁水预处理工艺模式确定为：高炉铁水－铁水包 KR 法脱硫－专用转炉脱硅、脱磷。

A piece of hot metal sufficient to slightly overfill the die shape is placed in the bottom die, and the top die is forced against it, so that the metal takes the internal shape of the die.

将一块大小足以充填模腔并能稍有溢出的加热金属放入底模，并将顶模加压合拢，这块金属便获得该模腔的形状。

The feature of the shaft furnace-iron bath smelter charging carbon-bearing pellets is that partial off-gas of shaft furnace is mixed with gas from smelter and then put into shaft for preheating and pre-reduction. The optimum operational parameter is at the point of prereduction degree of 52% and post-combustion degree of 32% where the coal consumption is 750kg/tone-hot metal and oxygen consumption is 420Nm〓/tone-hot metal.(5) The systematic simulation of rotary hearth furnace-iron bath smeter is firstly formulated.

4本文建立的含碳球团竖炉—铁浴工艺流程模型的特点之一是竖炉炉顶出口煤气的一部分与铁浴煤气混合后，重新进入竖炉，本文报道的对系统部分出口物流返回反应器的非序贯式流程进行的系统模拟，为今后类似问题的模拟提供了参考，本工艺的最低消耗点的操作条件是：预还原度52％，二次燃烧率32％，这时的最低煤耗为750kg／tFe（中挥发份煤VM=19％），氧耗约420Nm〓／tFe，对应于预还原度30～70％的优化组合的二次燃烧率为32～13％。

Through adopt the measure such as controling status of hot metal (for example content of carbon, content of oxygen, amount of converter slag, weight of hot metal etc.), depressing degree of vacuum promptly by driving vacuum pump ahead or increasing flow of nitrogen, controling correctly inserted deepness of duck, controling the time of decarburizing, process parameters of decarbonization for managing IF steel using RH—MFB equipment are optimized.

通过严格控制来钢条件，如碳、氧含量，转炉下渣量，钢水量；迅速降低真空室内真空度，采用预真空的压降模式，提高提升气体流量；保证浸渍管插入深度及脱碳时间等措施，优化了攀钢RH—MFB处理超低碳IF钢的脱碳工艺参数，取得了较明显的工艺效果。

So ,the temperature is quite essential for an engine to produce power .No engines can work well without suitable operating temperatures .If the engine runs too hot ,it may suffer form pre-ignition,while the air-fuel change is ignited prematurely from excessive combustion chamber temperature.Viscosity of the oil circulating in an over heating engine is reduced.Hot oil also forms varnish and carbon deposits may be drawn into the combustion chamber where it increases HC emission.This also causes poor performance and premature wear ,and may even result in engine damage.What is more,the behavior of the metals at excessively high temperature also differs from that at normal temperatures and can produce a condition in which the metal deforms slowly and continuously at a constant stress,If the engine runs too cold, the fuel will not vaporize properly.If liquid fuel reachees the cylinders,it will reduce lubrication by washing the oil from the cylinder walls and diluting the engin oil.This causes a loss ofperformance, an inrease in HC emissions, and premature engine wear.

所以，温度是很有必要的引擎来产生电力，没有引擎，可以工作，如果没有合适的操作温度，如果发动机运行太热，它可能遭受的形式预点火，而空气燃料的改变是点火过早过量燃烧室temperature.viscosity的石油流通的过度加热发动机是reduced.hot油价也构成了清漆和碳存款可能会被拖入燃烧室而增加hc的emission.this也造成业绩不佳和过早磨损，甚至可能导致发动机damage.what更重要的是，行为的研究金属在过高的温度也有不同，在正常温度下，可以达到的一个条件，其中金属变形速度缓慢，不断在恒应力，如果发动机运行太冷了，燃料价格将不会汽化properly.if液体燃料reachees气瓶，将减少润滑洗油从气缸壁和稀释器oil.this造成损失ofperformance ， inrease在hc排放，发动机过早磨损。

Check temperature settinga round dial mounted on the outside face of a square metal box(gas valve unitnear the bottom of the hot water tank is set at "WARM" or "VACATION"; adjust to higher temperature-"HOT".

检查温度调节器（一个安装在热水储存器底部附近的位于一个四方形的金属盒子的外表面的圆形的刻度盘）是否设在&WARM暖&或者&VACATION度假&上，如果是，把它调整到更高的温度设定&HOT热&上。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。