ES1240354U - Improved fire plate for single layer ovens (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved fire plate for mono-layer furnaces, characterized in that it has an interior of pressed ceramic fiber covered by at least two layers, where a primer layer comprises zirconium, bentonite and titanium, and a second layer or outer coating is formed by a homogeneous mixture of a product formed by titanium, calcium, sodium, boron and fluorine, and a second product comprising at least: - 50% zirconium. - 10% alumina. - 20% silica. (Machine-translation by Google Translate, not legally binding)

Description

D E S C R I P C I Ó N

IMPROVED FIREPLACE PLATE FOR MONOSTRATE OVENS

OBJECT OF THE INVENTION

The present invention relates to an improved fire plate for mono-layer furnaces

Advantageously, the firewall plates that are recommended have a pressed ceramic fiber which, unlike the existing ones, is subjected to a treatment based on the coating of several layers.

The advantage offered by the developed fire plates is to provide a plate resistant to high temperatures of up to 1800 ° C, to chemical attack and with improved mechanical capabilities that makes them suitable for installation in mono-layer furnaces.

BACKGROUND OF THE INVENTION

In the state of the art, fire plates for mono-layer furnaces are well known, where mono-layer furnaces are used for the thermal treatment and firing of mainly ceramic pavements and tiles.

Well, in this type of furnaces it is usual to install pressed ceramic fiber plates, which are located in different areas depending on the use they want to give them, namely:

- Its installation at the entrance of the furnaces, commonly called the lower zone, covering the wall and the vault. This area is characterized by accumulating less temperature to be of lower height than the rest of the oven, and to be at the beginning of the process.

- Its installation in intermediate areas where the highest temperatures are recorded. In this location the pressed ceramic fiber plates are called firewall plates.

In both cases the known plates have a high degree of deterioration because they are exposed to high temperatures and adverse conditions due to the presence of toxic gases that favor chemical attack.

The purpose of the improved fire plate of the present invention is to withstand the thermal and chemical shocks that are generated inside the mono-layer furnaces.

DESCRIPTION OF THE INVENTION

The improved fireproof plate for monolayer furnaces that is recommended solves in a completely satisfactory way the problem previously exposed, since the plate is subjected to a treatment based on the coating of at least two layers of different products, providing better performance than the plates already known.

The treatment that is performed on the fire plates to achieve the desired finish is as follows. The plate is integrated by a core or core core of pressed ceramic fiber on which a first layer of primer that has zirconium, bentonite and titanium will be applied.

After the primer layer, a second outer layer or coating formed by a homogeneous mixture of two products is applied to the firewall. The products that make up the homogeneous mixture are a first product formed by titanium, calcium, sodium, boron and fluorine, and a second product that comprises at least:

^o 50% zirconium

^o 10% alumina.

^o 20% silica.

The application of the primer layer and the outer coating generates a firewall plate that being its interior of pressed ceramic fiber offers the following properties:

- Withstand high temperatures, up to 1,800 ° C.

- Increase the resistance of chemical attack and erosion that generally takes place inside the monostrat kiln.

- Avoid breakage, dust generation and combing, due to its high mechanical resistance.

Additionally, the installation of the fire plates developed at the entrance of the mono-layer furnace, or low zone, allows to reduce the condensation of the area, increasing the insulation and decreasing the heat loss.

For all the above, the installation of the fire plates described in this application for utility model is highly recommended in mono-layer furnaces to extend their useful life in an optimal state, without being affected by adverse conditions present in an oven of this type .

PREFERRED EMBODIMENT

In a preferred embodiment, the fire plate has a pressed ceramic fiber interior to which a two-layer coating based treatment is performed, in order to significantly improve its mechanical and high temperature resistance capabilities.

The treatment carried out on the fire plates to achieve the desired finish is as follows:

- In a first step, a precoat of water-based primer is applied to a product in a pasty liquid state that is applied on the surface of the plate to prepare it for the subsequent process. It is a product similar to paint, whose main function is to protect and act as a support for a better adhesion of the product that is applied in the subsequent process.

Said product is formed by a main zirconium base, present in a proportion preferably of more than 50%, bentonite and titanium.

^o In a second stage, an easy-to-apply homogeneous mixture is made up of two products: a product formed by titanium, calcium, sodium, boron and fluorine, among others, and a second product that comprises at least 50% of Zirconium, 10% alumina and 20% silica.

The homogeneous mixture obtained is applied as a second layer on the fire plate.

- When these two layers are applied, the plates are introduced in airtight cabins with industrial dehumidifiers for the extraction of moisture present on the surface of the plates.

- Finally, and once the moisture has been removed, the plates are introduced into a chamber with fans and heaters to dry. These heaters will work at least at 220 ° C, with a slow curve of increase of one degree per minute.

The detailed process results in pressed ceramic fiber plates formed by two layers of coating, where the outer coating has a thickness of at least 2 mm whose function is essentially to prevent the chemical attack from entering.

Claims (3)

1§.- Improved fire plate for mono-layer furnaces, characterized in that it has an interior of pressed ceramic fiber covered by at least two layers, where a primer layer comprises zirconium, bentonite and titanium, and a second layer or outer coating is formed by a homogeneous mixture of a product formed by titanium, calcium, sodium, boron and fluorine, and a second product comprising at least: ^o 50% zirconium ^o 10% alumina. ^o 20% silica. 2§.- Improved fire plate for mono-layer furnaces, according to claim 1§, characterized in that the outer covering layer has a thickness of at least 2 mm. 3§.- Improved fire plate for single layer furnaces, according to claim 1, characterized in that the primer layer is water based.