DE644923C - Process for the repair and maintenance of heated floor, wall and ceiling surfaces of ovens and firing systems - Google Patents

Description

Bur. Ind. Self-dom

8-JUN. 1937

The industrial ovens, furnaces and vessels for coke production, for heating, Melting and picking up of metals, glasses and ceramic products as well as highly heated rooms of all kinds must be repaired from time to time, with the refractory lining, namely Wall surfaces, vaulted ceilings and floors, in whole or in part, by a fire-resistant one To replace building material are.

Repairs to the systems by inserting new stones, applying the most fire-resistant ones Mortar or cement layers are only possible during operation, taking into account the radiant heat, how the areas to be repaired are easily accessible. In coke oven chambers, e.g. B., the length of up to 15m, the repair of the hot walls can no longer

so safely done with the help of pliers, shovels, rods or rammers will.

In such inaccessible places, the repair can only be carried out if the The furnace or firing has been shut down and cooled down to such an extent that the system can be walked on is. These downtimes, often lasting several days, have several disadvantages; the facilities to be repaired fail for operation, so that replacement systems must be available, if there is no stopping of operations. When it cools down, it works stored heat is wasted uselessly; she must be replaced by increased fuel consumption when re-heating. The cooling and heating of the repaired systems must usually take place slowly, to avoid cracks and leaks.

The inner surfaces of the furnace and furnace can, however, also be repaired in inaccessible places by spraying on or upgrading lumpy or ground, moistened building materials; however, prior cooling of the surfaces with their described disadvantages is also a precondition for this process. If you wanted to apply this process to the repair of glowing surfaces, the moisture would evaporate very early and the building material would trickle down before it adheres and sets. The repair of highly heated surfaces during short breaks in operation by throwing up dry sand, dolomite and other building materials is limited to flat and slightly sloping surfaces; steeply inclined and vertical surface and corner vaults are not suitable for such repair methods.

The present invention relates to a method that allows refractory linings regardless of their temperature and the inclination of the! '"laugh even at inaccessible ones Treat bodies by applying and applying damaged areas simultaneous burning of such substances from

Claims (3)

ameliorates that leave oxides when burned, which alone or together with other oxides can serve as refractory building materials. Processes are known in which refractory building materials are burned at the same time of conventional, mixed solid, liquid or gaseous fuels welded or welded onto surfaces to be repaired. »O be burned up; What is new about the present invention, however, is that in some cases as fuels or only those substances are used which themselves form refractory oxides during combustion. These include for example aluminum, silicon and magnesium, when burned the highly refractory building materials aluminum oxide, silicic acid or magnesium oxide arise. These Storfe can also with each other and with coal dust or mixed with other known fuels as well as in the form of alloys for the treatment of the repaired and surfaces to be maintained are applied. With the complete combustion of For example, three parts by weight of aluminum and five parts by weight of silicon are produced a product similar to fireclay with 35 ° .b aluminum oxide and 65 »Ό silica, which welds onto the surface to be repaired. For reasons of savings, the The mixture of combustible substances mentioned as an example is fireclay or aluminum-silica mixtures from the outset are added in suitable proportions, which together with the combustion products on din Burn areas to be repaired. When using the flammable materials alone, the area to be repaired becomes here brought to such a high temperature that subsequently refractory building materials without simultaneous Combustion can be welded onto the surface to be repaired, whereby this cools down again. The alternate treatment of the areas to be repaired with the combustible materials described above and with the most flammable building materials can be repeated as often as required. The oxidation and combustion of the flammable substances used in the invention i takes place by simultaneously blowing air or by heating gases from the ovens and Combustion systems. To increase the combustion speed and the heat output you can preheat the air or enrich the air or the heating gases with oxygen to any extent or mix the fuels with oxygen-releasing compounds. Ongoing application of the method based on the invention described enables the maintenance of technical furnaces and firing systems even in hard-to-reach places without major ones Business interruptions, so that the service life of the system is considerably increased will. Ρλ τ ε ν τ λ nsi'Rüciie: i. Methods of repair and maintenance of heated floor, wall and ceiling roofs of ovens and furnaces and vessels for mining, metallurgical, ceramic and other chemical and technical purposes by applying touch-ups mixed with heat-emitting agents, those enriched with oxygen with the addition of later circumstances Air are burned, characterized in that "o Means partially or exclusively such combustible substances in the form of elements, whose compounds, mixtures, mixtures or alloys are used, which leave behind oxides when they are burned or form oxides, which alone or in conjunction with other oxides can serve as refractory building materials. 2. The method according to claim 1, characterized in that the combustible Stotfe used mixed with refractory oxides. 3. The method according to claim 1 and 2, characterized in that the combustible Substances and refractory oxides alternately to the or to be repaired surfaces to be maintained are applied.