公开(公告)号：US06192065B1

公开(公告)日：2001-02-20

申请号：US09428919

申请日：1999-10-28

申请人： Jan Abraham Ferreira ,  Anthony Wayne Wewege

发明人： Jan Abraham Ferreira ,  Anthony Wayne Wewege

IPC分类号： H05B7144

CPC分类号： H05B7/00

摘要： In the operation of a dc arc furnace components of the furnace are monitored to detect unwanted arcs. A first low impedance path is continuously established between the components. When an arc is detected a second conductive path of a predetermined impedance is established between the components, in parallel to the first low impedance path, to extinguish the arc. After the arc has been extinguished the second path is open circuited to restore the furnace to normal operation.

摘要翻译： 在直流电弧炉的操作中，监测炉子的部件以检测不需要的电弧。 在组件之间连续建立第一个低阻抗路径。 当检测到电弧时，在与第一低阻抗路径平行的部件之间建立预定阻抗的第二导电路径以熄灭电弧。 电弧熄灭后，第二路径开路，将炉恢复正常运行。

公开(公告)号：US06246712B1

公开(公告)日：2001-06-12

申请号：US08987046

申请日：1997-12-10

申请人： Rodney Murison Whyte ,  Edwin Harm Roos ,  Andrew Bryan Johnston ,  Jan Abraham Ferreira ,  Dirk Renaat Gabriel Faveere ,  Anthony Wayne Wewege

发明人： Rodney Murison Whyte ,  Edwin Harm Roos ,  Andrew Bryan Johnston ,  Jan Abraham Ferreira ,  Dirk Renaat Gabriel Faveere ,  Anthony Wayne Wewege

IPC分类号： F27D100

CPC分类号： H05B7/005 ,  F27B3/14 ,  F27B3/24 ,  F27D1/1816 ,  F27D11/10

摘要： An arc furnace which includes a shell with a hearth, a roof for the shell, the roof including a plurality of segments which are substantially electrically isolated from each other and from the shell, an electrode and a refractory section on the roof, and wherein the refractory section is at least partly electrically conductive.

摘要翻译： 一种电弧炉，其包括具有炉床的壳体，用于壳体的屋顶，所述屋顶包括彼此基本上电隔离并且与所述壳体基本上电隔离的多个段，所述屋顶上的电极和耐火部分， 耐火部分至少部分导电。