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    • 64. 发明专利
    • Method for controlling plate temperature
    • 控制板温度的方法
    • JPS5760025A
    • 1982-04-10
    • JP13617880
    • 1980-09-30
    • Nippon Steel Corp
    • YUI KATSUHIKOSUEHIRO KATSUMIIKEUE HIROSHI
    • C21D9/56C21D9/52C21D11/00
    • C21D9/52
    • PURPOSE:To expedite the response of strip temp. by performing forcing in order to correct the calculated value of the rate of transfer of heat between hearth rolls and the strip at the changing of the target temp. and the like of the heating or cooling furnace of a continuous annealing furnace. CONSTITUTION:While a strip 1 is transferred by the revolution of hearth rolls 5 of a continuous annealing furnace 2, it is heated or cooled continuously. At the changing of the target temp., thickness, and speed of the strip 1 of the furnace outlet, the quantity of heat corresponding to the rate of heat transfer between the rolls 5 and the strip 1 is calculated, and in order to correct this, forcing is carried out by using the quantity of heating or cooling. For example, at the changing of the target temp. of the strip 1, C1 is the strip temp. at the zone inlet C2, C2' are the temps. of the rolls 5, C3, C3' are the strip temps. at the zone outlet, C4 is the flow rate of fuel when the effect of the rolls 5 is not considered, and C5 is then forcing rate of the flow rate of fuel when said effect is considered. The C2, C3 and the C2', C3' are respectively the case when the forcing is carried out and when it is not and the time for setting at the target temp. of the strip is improved from about 11min to about 1min.
    • 目的:加快钢带温度的响应 通过执行强制以在改变目标温度时校正炉床和条带之间的热传递速率的计算值。 以及连续退火炉的加热或冷却炉等。 构成:通过连续退火炉2的炉底辊5的转动将钢带1转移,连续加热或冷却。 在炉出口的条1的目标温度,厚度和速度的变化中,计算与辊5和带1之间的热传递速率相对应的热量,并且为了校正该 ,通过使用加热或冷却的量进行强制。 例如,在改变目标温度时。 的条带1,C1是条带温度。 在区域入口C2处,C2'是温度。 的辊5,C3,C3'是带材。 在区域出口处,当不考虑辊5的影响时,C4是燃料的流量,当考虑到所述效果时,C5是燃料流量的强制速率。 C2,C3和C2',C3'分别是当强制被执行的时候,而不是目标温度时设定的时间。 的条带从约11分钟改善至约1分钟。
    • 65. 发明专利
    • Operating method for base fan of box type coil annealing furnace
    • 箱式线圈退火炉底座风机的运行方法
    • JPS5741328A
    • 1982-03-08
    • JP11469780
    • 1980-08-22
    • Nippon Steel Corp
    • OOKOUCHI TOSHIHIROKOBAYASHI KAZUO
    • C21D9/663C21D9/52
    • C21D9/52
    • PURPOSE:To save electric power considerably by fully operating a base fan in a heating period and a natural cooling period and decreasing the number of revolutions of the base fan within the range of not lowering the overall heat transfer coefft. in a furnace in a soaking period and a force cooling period. CONSTITUTION:The quantity of heat transfer from a furnace to the center of a coil in a heating period and a soaking period is as per the equation I, wherein (t) is the temp. of an inner cover, t4 is the temp. at the center of the coil, Fc is the heat transfer area of the coil, beta Fi/Fc, Fi are the heat transfer areas of the inner cover, and KT is the overall heat transfer coefft. In spite of decreasing the unmber of revolutions of the base fan, the decrease in the KT is small if the gaseous temp. exceeds about 700 deg.C (corresponds roughly to a soaking period), and at above 0.6 ratio of the number of revolutions, it is negligible. The force cooling period is expressed by the equation II, and in the case of force cooling cooler cooling, if the gaseous temp. lowers to a certain degree, the decrease in the KT, is small and is virtually negligible in spite of decreasing the number of revolutions of the base fan. Thereby, the annealing capacity is maintained with a certain decrease in the number of revolutions of the base fan.
    • 目的:通过在加热期间和自然冷却期间完全操作基础风扇,在不降低整体传热系数的范围内,减小基座风扇的转数,大大节省电力。 在均热期间和强制冷却期间的炉中。 构成:在加热期间和均热期间从炉到线圈中心的热传递量如式I所示,其中(t)为温度。 的内盖,t4是温度。 在线圈的中心,Fc是线圈的传热面积,βFi / Fc,Fi是内盖的传热面积,KT是整个热传递系数。 尽管基础风机的转速不降低,但如果气体温度下降,则KT的降低很小。 超过约700摄氏度(大致对应于均热时间),并且在高于0.6的转数比下,其可以忽略不计。 强制冷却时间由方程式II表示,而在强制冷却冷却器的情况下,如果气体温度为 虽然减少了基本风扇的转速,但在一定程度上降低了KT的降低,并且几乎可以忽略不计。 由此,退火能力保持在基本风扇的转数一定程度上降低。