Claims
- 1. An electric arc furnace shell of the vertical axial type for use with molten metal,
- comprising a generally dish-shaped bottom section having a metal bottom casing and a refractory lining,
- said bottom section having a generally vertical axis and being generally circular in horizontal cross section,
- a first generally ring-shaped wall section removably mounted on top of said bottom section and having a first ring-shaped metal casing and a refractory lining,
- said first wall section being removable as a separate unit from said bottom section and being replaceable thereon,
- said first ring-shaped metal casing of said first wall section being separate from said bottom metal casing with a disengageable joint therebetween,
- said first ring-shaped wall section having a generally vertical axis and being generally circular in horizontal cross section,
- and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a second ring-shaped metal casing and a refractory lining,
- said second wall section being removable as a separate unit from said first wall section and being replaceable thereon,
- said second ring-shaped metal casing being separate from said first ring-shaped metal casing with a disengageable joint therebetween,
- said second ring-shaped wall section having a generally vertical axis and being generally circular in horizontal cross section,
- each of said ring-shaped metal casings of said wall sections having its own means for supporting the refractory lining thereof when said wall section is dismounted from the furnace shell,
- whereby the refractory lining may be installed in each wall section prior to the mounting of the wall section on the furnace shell,
- said first and second wall sections constituting a generally ring-shaped side wall portion of said furnace shell,
- said side wall portion being generally barrel-shaped in that said first wall section flares upwardly in its internal horizontal diameter toward a maximum internal diameter,
- while said second wall section flares downwardly toward said maximum internal diameter,
- the barrel-shape of said side wall portion increasing the ability of said side wall portion to withstand electric arc action.
- 2. An electric arc furnace shell according to claim 1,
- in which said first wall section is formed with a slag discharge opening,
- said maximum internal diameter occurring above said slag discharge opening to enhance the volume in said furnace shell above said slag discharge opening whereby the ability of said furnace shell to withstand electric arc action is enhanced.
- 3. An electric arc furnace shell of the vertical axial type for use with molten metal,
- comprising a generally dish-shaped bottom section having a metal bottom casing and a refractory lining,
- said bottom section having a generally vertical axis and being generally circular in horizontal cross section,
- a first generally ring-shaped wall section removably mounted on top of said bottom section and having a first ring-shaped metal casing and a refractory lining,
- said first wall section having a generally vertical axis and being generally circular in horizontal cross section,
- and a second generally ring-shaped wall section removably mounted on top of said first wall section and having a second ring-shaped metal casing and a refractory lining,
- said second wall section having a generally vertical axis and being generally circular in horizontal cross section,
- said first and second wall sections constituting a generally ring-shaped side wall portion of said furnace shell,
- said side wall portion being generally barrel-shaped in vertical cross section in that said first wall section flares upwardly in its internal horizontal diameter toward a maximum horizontal internal diameter,
- while said second wall section flares downwardly in its internal horizontal diameter toward said maximum internal horizontal diameter,
- the barrel-shape of said side wall portion being effective to enhance the ability of said side wall portion to withstand electric arc action.
- 4. An electric arc furnace shell according to claim 3,
- in which said first wall section is formed with a slag discharge opening,
- said maximum internal horizontal diameter occurring above said slag discharge opening to enhance the volume in said furnace shell above said slag discharge opening whereby the ability of said furnace shell to withstand electric arc action above said slag discharge opening is enhanced.
- 5. An electric arc furnace shell of the vertical axial type for use with molten metal,
- comprising a generally dish-shaped bottom portion having a metal casing with a refractory lining,
- said bottom portion having a generally vertical axis and being generally circular in horizontal cross section,
- and a generally ring-shaped wall portion extending upwardly from said bottom portion and having a metal casing with a refractory lining,
- said wall portion having a generally vertical axis and being generally circular in horizontal cross section,
- said wall portion having a slag discharge opening therein,
- said wall portion being generally barrel-shaped in vertical cross section in that said wall portion has a lower portion flaring upwardly in its internal horizontal diameter toward a maximum internal horizontal diameter disposed above said slag discharge opening,
- said wall portion having an upper portion flaring downwardly in its internal horizontal diameter toward said maximum internal horizontal diameter,
- whereby the volume in said furnace shell above said slag discharge opening is enhanced and the ability of said wall portion to withstand electric arc action above said slag discharge opening is increased.
Parent Case Info
This application is a continuation of my copending application, Ser. No. 277,142, filed Aug. 2, 1972.
US Referenced Citations (4)
Continuations (1)
|
Number |
Date |
Country |
Parent |
277142 |
Aug 1972 |
|