US 4,290,751 A · Blast furnace stove

Abstract

A hot blast stove for preheating combustion air for an associated blast furnace, having a continuous, substantially cylindrical shaped peripheral wall extending from a base to a domed cover. The peripheral wall includes a first cylindrical portion defined by a refractory ring wall of a predetermined thickness, surrounded by insulation, and enclosed by a continuous metal shell; and, a second, diametrically larger, cylindrical portion disposed above the first cylindrical portion, defined by a continuation of the refractory ring wall of the first portion, surrounded by a predetermined thickness of insulating brick and insulation. The second portion is enclosed by a continuous metal shell which joins the domed cover. An annular interconnecting portion joins the cylindrical portions and includes a metal shell that diverges outwardly from the metal shell of the first portion to obliquely join the metal shell of the cylindrical portion. The interconnecting metal shell provides support for tapered insulating bricks which in turn support the insulating brick in the second portion. Alternately, the interconnecting portion includes nontapered insulating bricks and castable insulation between the shell and the ringwall.

Claims5

Dependent claims

A blast furnace stove having a continuous peripheral wall of substantially circular cross section extending from a base to a domed cover, comprising:

(a) a lower section including:
(i) a refractory ring wall of a predetermined thickness;
(ii) a lower metal shell having a substantially uniform diameter surrounding said ring wall;
(iii) a layer of insulation intermediate the ring wall and the metal shell;
(b) an upper, diametrically larger, section disposed above the lower section including:
(i) a continuation of the refractory ring wall of the lower section;
(ii) a layer of insulating brick surrounding said ring wall in the upper section;
(iii) an upper metal shell having a substantially uniform diameter surrounding said insulating brick;
(iv) a layer of insulation intermediate the insulating brick and the upper metal shell;
(c) an annular interconnecting section intermediate the lower and upper sections including:
(i) a continuation of the refractory ring wall of the lower section;
(ii) vertically tapered insulating bricks surrounding said refractory ring wall;
(iii) a layer of insulation surrounding said tapered insulating bricks;
(iv) an annular interconnecting metal shell portion which obliquely joins the lower metal shell and upper metal shell to provide a gradual increasing diameter from the lower section to the upper section of the peripheral wall, said shell providing some vertical support for the tapered insulating bricks.

11 more elements

Dependencies are inferred from the claim text.

Blast furnace stove

Life of this patent

Blast furnace stove

Life of this patent

Abstract

Claims5