共查询到20条相似文献,搜索用时 109 毫秒
1.
步进式加热炉钢坯输送新法为了大幅度减少步进式加热炉中钢坯的黑印,以及提高轧制材的宽、厚精度,日本住友金属工业公司野哲夫发明了步进式加热炉钢坯输送新法。作业者可通过活动梁移动步进式加热炉固定梁,这样置于固定梁上的钢坯便能得到有效地均匀加热。应指出:活动... 相似文献
2.
加热炉内钢坯氧化烧损影响因素分析 总被引:1,自引:0,他引:1
钢坯加热过程中的氧化烧损一直是钢铁企业十分关注的问题。氧化烧损的出现不仅降低了钢坯的导热系数进而降低了加热炉效率而且影响了出炉钢坯的质量,带来了巨大的经济损失。以某钢厂步进式加热炉加热普碳钢为例,从加热温度、加热时间、炉内气氛、闷炉、热装这5个方面来分析钢坯氧化烧损影响因素并给出建设性意见,为后续的技术改进提供参考依据。 相似文献
3.
4.
5.
采用CFD数值模拟的方法以加热炉内炉气与钢坯的热量交换为研究对象,建立不同燃料配比情况下炉气在炉内传热过程以及钢坯加热过程的数学模型;并探讨步进式加热炉内钢坯运动轨迹同炉膛温度分布的合理匹配方案,从而合理地组织燃料燃烧,达到节能降耗的目的.研究表明,随着高炉煤气中焦炉煤气比例的增加,钢坯的平均温度增加;钢坯的换热效率略... 相似文献
6.
加热炉内钢坯氧化烧损影响因素分析 总被引:1,自引:0,他引:1
以某钢厂步进式加热炉加热普碳钢为例,从加热温度、加热时间、炉内气氛、闷炉、热装这5个方面来分析钢坯氧化烧损影响因素并给出建设性意见,为后续的技术改进提供参考依据。 相似文献
7.
随着高速线材厂高附加值、高技术含量产品的不断增加,对钢坯的加热质量提出了更高的要求。针对高速线材步进式加热炉加热制度的要求.进行了既能提高钢坯加热质量.又能降低燃料消耗的最佳加热工艺的研究与实践。 相似文献
8.
9.
10.
11.
《Baosteel Technical Research》2012,6(1):53-56
The temperature distribution of steel plates is affected by heating rates and heating curves in the process of induction heating.The magnetic flux density inside the induction furnace was measured,the distribution of magnetic flux density was analyzed and the uniform area of the induction heating temperature distribution was ascertained.The locations for measuring temperature were set and the temperature in different processes was measured.The influence of heating rates and heating curves on the temperature difference of steel plates was studied.The experimental results showed that the steel plates’ temperature difference increased with the increase of the heating rate.The temperature difference was obviously affected by different heating curves when the heating rate was the same.A suitable heating curve would be beneficial to reduction of steel plates’ temperature difference. 相似文献
12.
微波加热技术是一种新型的加热技术。在白云石煅烧过程中引入微波加热技术对硅热法炼镁进行改进。对微波加热白云石生产煅烧白云石进行实验研究,测定最佳加热温度和时间。结果表明:微波加热方式比传统加热方式所需的加热温度低50~60℃,所用的加热时间少40~50min,具有未来工业化的开发价值。 相似文献
13.
通道式感应加热是实现中间包低过热度浇铸有效方法之一,针对国内某钢厂单流通道式感应加热中间包,建立三维非稳态数学模型,研究通道加热功率对中间包内流场、温度场及夹杂物去除的影响规律。结果表明, 当中间包未受感应加热或加热功率超过800 kW时,钢水流动特性均较差;当通道加热功率为300、600或700 kW时,钢液流动特性良好。当中间包无感应加热时,浇铸区出现明显的温度分层现象;当加热功率为500~700 kW时,浇铸区温度分布均匀且基本消除了其右上方及右下方区域的温度分层。当加热功率在400~700 kW时,夹杂物去除率呈上升趋势;但当加热功率超过700 kW后,夹杂物去除效果变差,700 kW为最佳去夹杂加热功率。 相似文献
14.
Zhiwei Peng Jiann-Yang Hwang Chong-Lyuck Park Byoung-Gon Kim Gerald Onyedika 《Metallurgical and Materials Transactions A》2012,43(3):1070-1078
A numerical simulation of heat transfer during the microwave heating process of magnetite, which is a two-dimensional (2-D)
magnetic dielectric, subjected to heat conduction, convection, and radiation was performed. The heat transfer process was
modeled using an explicit finite-difference approach, and the temperature profiles for different heating parameters were generated
through developing a code in Mathematica 7.0 (Wolfram Research, Inc., Champaign, IL). The temperature in the sample increases
rapidly in 1 minute and nonuniform temperature distribution inside the object is observed. An obvious temperature hot spot
is formed in the corner of the predicted temperature profile initially, which shifts to the center of the object as heating
power increases. Microwave heating at 915 MHz exhibits better heating uniformity than 2450 MHz mainly because of the larger
microwave penetration depth. It is also observed that the heating homogeneity in the object can be improved by reducing the
dimension of object. The effects of heating time, microwave power, microwave frequency, and object dimension need to be considered
to obtain high heating performance and avoid/minimize thermal runaway resulting from temperature nonuniformity in large-scale
microwave heating. 相似文献
15.
16.
17.
18.
利用热模拟试验机Gleeble - 3800,热模拟试验研究了V、Mo、V+Mo等元素、加热温度、保温时间对微合金化贝氏体钢中第二相析出的影响.结果表明,Nb、V、Ti、Mo的复合加入有利于第二相的析出,加热温度和保温时间对析出量的影响较小. 相似文献
19.
20.
采用微波加热技术,研究了脱硫石膏中含水量对其升温特性的影响。结果表明,在微波加热的条件下,含水量25%的脱硫石膏比含水量20%和0%的脱硫石膏最终加热温度更高,升温过程分为快速升温阶段和温度平衡阶段。在配加无烟煤和磁铁矿的脱硫石膏混合物料中,含水量过多或过少都会阻碍高温区内温度的继续升高。脱硫石膏中含水会影响混合料中无烟煤的微波选择性加热和热点的产生,脱硫石膏中的含水量越少,无烟煤越早燃烧。当脱硫石膏含水量为20%时,无烟煤和热点不同时的升温会降低升温速率突然变化的可能性,防止热失控的产生,产生更好的升温效果。 相似文献