US 4,406,619 AGranted

Sealing lid means for coke oven chamber

OwnerHans Oldengottinventor

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Abstract

In a coke oven of the type having a plurality of filling shafts with openings and caps therefor at the oven roof, in order to reduce the temperature gradient and heat losses at the roof of the coke oven, the caps of the filling shafts are each directly mounted on fire-resistant brickwork rather than a metallic frame; also, the associated caps are each made of ceramic material with optional reinforcement and include a metal insert which is heat insulated from the oven by a heat barrier. The metal insert facilitates magnetic hoisting of the cap during unloading and loading of the oven and is provided with an adjoining layer of fired clay and felt. The engaging surfaces of the cap body and the brickwork of the filling shaft opening are preferably conical and define an annular recess on the outside for pouring cement or the like to secure the cap in position and seal off the shaft.

Claims14

Dependent claims

A coke oven of the type comprising brickwork and a plurality of filling shafts terminating at the oven roof through the brickwork, said filling shafts being used for loading and unloading purposes as desired, each said filling shaft having a refractory terminal structure and being provided with a closing means in the form of a removable lid, each said lid being adapted for being hoisted away from the oven roof during loading and unloading, each lid having a construction comprising:

a lid body substantially in the form of a ceramic plate adapted to rest on an opening of the filling shaft terminal structure, said lid body having a recess formed by a circumferential ridge;
a plate-like metal insert provided in said recess in the lid body for facilitating hoisting of the lid during loading and unloading, said plate-like insert having a diameter substantially smaller than a diameter of a said filling shaft;
support means provided on the metal insert in the form of a plurality of radial extensions from a periphery of said plate-like insert, said radial extensions being embedded in the ceramic lid body, to prevent the plate-like metal insert from falling through the filling shaft;
heat-insulating means disposed between the lid body and the metal insert, so as to prevent heat transfer from the lid body to said metal insert;
fastening means provided to fasten said metal insert and said lid body with said heat-insulating means substantially sandwiched there between.

2 more elements

In combination, a filling hole closure arrangement in the form of coke oven lid closing a filling shaft opening formed by terminal fire-resistant brickwork structure of a filling shaft of a coke oven, comprising:

a lid body substantially in the form of a ceramic plate adpated to rest on an opening of said terminal structure, said body including randomly distributed internal means to reinforce the lid body, said lid body having a plate-shaped surface-recess formed by a circumferential ridge around and at the periphery of said lid body;
a ferromagnetic metal plate insert disposed in said recess and fastened to said lid body for facilitating magnetic hoisting of the lid, said ferromagnetic plate insert having a diameter substantially less than said filling shaft opening;
support means provided on the metal insert in the form of a plurality for radial extensions from the periphery of said ferromagnetic plate insert, said extensions being embedded in the lid body;
heat-insulation means disposed in said recess between the lid body and the ferromagnetic plate insert so as to minimize heat escape to the plate insert from the coke oven shaft and lid;
and
heat insulated fastening means provided to fasten said ferromagnetic plate insert to the lid body with said heat-insulation means sandwiched therebetween, whereby in view of plate insert being of substantially smaller diameter than said shaft opening, the heat dissipation and heat loss at the ferromagnetic plate insert is substantially minimized.

3 more elements

Dependencies are inferred from the claim text.