We claim:
1. A furnace comprising:
a body of a furnace having a cylindrical shape;
a steel shell which is arranged at an inside surface of the fiimace; and
a lining refractory which is arranged at an inside of the steel shell and includes a plurality
of refractory blocks, wherein:
the refractory blocks includes a hot-face end surface which has a hexagonal shape and is
exposed to a middle of the fiimace, and a cold-face end surface which has a hexagonal shape
and is larger than the hot-face end surface, the cold-face end surface being arranged at an outer
periphery of the fiimace;
the refractory blocks are trapezoid shapes in which two surfaces among the six surfaces
present at the barrel portion thereof expand from the hot-face end surface toward the cold-face
end surface and facing surfaces are formed parallel;
the plurality refractory blocks is arranged such that the position of the hot-face end
surface along the radial direction of the fumace is aligned with a predetermined reference
position;
the plurality of refractory blocks is arrayed along the circumferential direction of an
inside surface of the steel shell such that trapezoid shaped surfaces of the barrel position surface
are perpendicular to the axial direction of the cylindrical body of a fumace, thereby being
stacked in a honeycomb manner; and
the refractory block fiarther includes a block arrangement jig having a metallic plate and a
metallic grip that extends from a surface of the metallic plate, the block arrangement jig being
fixed with an adhesive and a bolt.
2. The fumace according to claim 1, wherein in a base portion and a top portion of the steel
shell of the cylindrical fumace, half-blocks are arrayed in plurality at predetermined intervals
along the circumferential direction;
the half-blocks include a block shape that can be made by cutting the refractory block
such that the hot-face end surface and the cold-face end surface are each evenly divided into two
trapezoids at a surface parallel to the two trapezoid shaped surfaces of the barrel portion surface;
-If.-
^ the half-blocks at the bottom portion are arranged such that the end surface shape forms a
trapezoid in which lower base is longer than the upper base, and the half-blocks in the top
portion are arranged such that the end surface shape forms a trapezoid in which the upper base is
longer than the lower base; and
the plurality of refractory blocks are stacked in a honeycomb manner.
3. The furnace according to claim 1, wherein monolithic refractories or powder refractories
fill the space between the refractory blocks and the iron shell.
4. The fixmace according to claim 2, wherein monolithic refractories or powder refractories
fill the space between the refractory blocks and the iron shell.
5. The furnace according to claim 1, wherein the refractory blocks are disposed with a
thermal expansion absorbing member that absorbs thermal expansion interposed therebetween.
6. The furnace according to claim 2, wherein the refractory blocks are disposed with a
thermal expansion absorbing member that absorbs thermal expansion therebetween.
7. The furnace according to claim 3, wherein the refractory blocks are disposed with a
thermal expansion absorbing member that absorbs thermal expansion therebetween.
8. The fiimace according to claim 4, wherein the refractory blocks are disposed with a
thermal expansion absorbing member that absorbs thermal expansion therebetween.
9. A refractory installing method for lining refractories with an inside surface of a steel shell
of a cylindrical fiamace, where a refractory includes hexagonal cone
trapezoid refractory blocks and half-blocks that have a shape obtained by dividing the
refractory blocks, the method including
using a refractory block that includes a hexagonal hot-face end surface and a hexagonal
cold-face end surface that is larger than the hot-face end surface of the surface, and the refractory
blocks are formed such that two surfaces among the six surfaces present at the barrel portion
™ surface are trapezoid shapes that expand from the hot-face end surface toward the cold-face end
surface and the facing surfaces are parallel;
using half-blocks which include a block shape made by cutting the refractory blocks so
that the hot-face end surface and the cold-face end surface are each equally divided into two
trapezoids at surfaces that are parallel to the two frapezoid surfaces of the barrel portion surface;
including, in the refractory block, a block arrangement jig having a metallic plate and a
metallic grip that extends from a surface of the metallic plate, he block arrangement jig being
fixed with an adhesive and a bolt;
arraying a plurality of the refractory blocks such that each position of the hot-face end
surface along the radial direction of the flimace is aligned with a predetermined reference
position;
stacking the plurality of refractory blocks along the circumferential direction of the iron
shell inner surface and the trapezoid face of the barrel portion surface faces a direction
perpendicular to the axial direction of the cylindrical body of a furnace in a honeycomb manner:
arraying, at the bottom portion of the iron shell of the cylindrical ftimace when stacking,
a plurality of half-blocks at predetermined intervals along a circumferential direction such that
the end surface shape forms a trapezoid in which the lower base is longer than the upper base,
disposing the refractory blocks so as to fit between half-blocks, stacking the refractory blocks in
a honeycomb manner, and at the top of the iron shell of the cylindrical furnace, arraying in
plurality half-blocks so as to form a trapezoid in which the end surface shape is longer at the
upper base than the lower base; and
grasping, during arraying and stacking, the grip so as to lift and install the refractory
blocks.
Dated this 31/10/2011 / h
IJAYANTA PAL]
OF RRMFRW & SAGAR
ATTORNEY FOR THk APFLICANT[S]
i