Fused Cast AZS block is also called electro Zircon corundum block, which is abbreviated as AZS because it contains Al2O3-ZrO2-SiO2. Alumina-zirconia-silica (AZS) fused-cast refractories began to increase in popularity in glass furnace applications for the glass contact and. fused Cast AZS refractories are the most widely used materials both in glass contact and superstructure of glass melting products are made of.

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The refractory composition may be formed on the wear portion using one or more refractory forming methods such as casting, pumping, or shotcreting formless pumping with a setting accelerant. US USB2 en High temperature resistant, highly loadable, fine ceramic, sintered construction material, process for its production, and a component made of a ceramic material. The refractory composition of claim 1 wherein the refractory composition is formed on at least one wear portion of a brass furnace.

Standard Search Advanced Search. The method of claim 21 wherein the first set of components comprises alumina particles with an average particle size greater than 1 mm.

Reference Number Reference Number. A method of preparing a refractory, comprising: Glass may be constructed of separate refractory brick or blocks within a frame. Special detailed bricks technical data sheet are avalible upon request. This research was conducted to develop new formulations of AZS rferactory with different amounts of ZrO 2 with the purpose of improving the characteristics, properties and the work conditions in the glass melting furnaces and, at the same time, lower the costs this type of refractories.

The alumina may be provided by a high aluminum aggregate such as tabular or white fused alumina. The wear spots typically grow until the refractory fails to hold the molten glass. Tefractory unfired refractory bricks and method for the manufacture of the same.

Properties and applications of fused cast AZS – Refractory Materials in Glass Industry

Other proportions of the first set of components may be used. However, another problem encountered in glass industry is contamination by refractory’ material that fall into the molten glass, which can produce a series of defects in the final product.


For each Example, the first set refrqctory components was mixed together prior to mixing with the colloidal silica binder. Reading, OhioAlcan, Inc. The refractory composition includes a first set of components mixed with a colloidal silica binder. Each aspect so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary.

Other embodiments and implementations are possible within the scope of this invention and will be apparent to those of ordinary skill in the art. However, the description and illustrations are by way of example only. Zirconia Corundum Brick ZA It is the most widely used in the products of glass furnace, the upper part of the structure is mainly applicable to the molten pool, pool wall brick and tile work pool, material etc.

In particular, any feature indicated as being preferred or advantageous may be combined with any other reffractory or features indicated as being preferred or advantageous. The refractory composition may be formed on one or more portions of the sidewall or hearth.

US20080314085A1 – AZS refractory composition – Google Patents

refraxtory The composition of Example 1 showed superior performance to the composition of Comparative Example B, especially at the bath line. A refractory composition includes a first set of components and a colloidal silica binder.

The refractory composition of claim 17 wherein the refractory composition does not include an effective amount of a hydraulic cement. To simulate the harsh conditions in a glass melting furnace, refractory corrosion tests were performed on the colloidal silica refractories to evaluate their resistance to molten glass.

The first set of components may include about 0. CA CAC en In one aspect, this invention provides a refractory composition especially useful for furnaces.

AZS Bricks

The test was repeated for each sample for a total of two tests for each composition. Article made from refractory material for contact with a liquid metal or alloy, a method for manufacture, use and refeactory of use of same.

Rebonded Fused Mullite bricks MFZ-6 are used as pure-oxygen burner blocks in alkali-free glass furnaces, crown blocks and arch blocks in ceramic frit furnaces, and areas of high temperature and high thermal stress in other industrial furnaces. The AZS refractory blocks are made from molten material cast into molds, which are machined after hardening. Therefore, selected key parts of the glass furnace, so that these parts of the life and the other part of the lower scale. The present invention provides a colloidal silica refractory composition that is especially useful for glass melting furnaces.


Close Go to Workspace. Typical applications are superstructures, skew blocks, wall bricks and upper-checker in regenerators, paving, sub-paving, and forehearth blocks in float glass furnaces.

The furnace was operated for a period of time and the composition was found to perform well throughout the furnace. For Comparative Refrctory B, the alumino-silicate product worked well above the bath line and the alumina-silicon carbide product worked well below the bath line, but neither material held up at the interface.

The colloidal silica refractory provides refractort good resistance to refrxctory temperature corrosive environments. Reefractory composition prepared according to Example 1 was applied in a brass furnace. Dal Maschio et refracgory. Looks like Javascript is disabled on your browser. For illustration purposes and not as a limitation, Table 1 provides exemplary types and proportions of first set of components for the colloidal silica refractory system.

Fused Cast AZS Refractories ~ LONTTO Refractory

The method of refractlry 21 wherein the furnace is a brass furnace. Development of AZS refractories for the glass industry. More particularly, this invention relates to qzs silica refractories for the lining of furnaces, such as glass and brass furnaces. The refractory composition disclosed herein may also be used in other types of furnaces, such as brass furnaces. Aza results obtained indicate that the composition with low content of ZrO 2 can provide better properties than the commercial product, with some modifications in the particle size distribution.

Thus, the refractory of Example 1 had a higher amount of zirconia than the refractory of the Comparative Example. The method of claim 21 wherein the refractory composition is formed by a method selected from casting, pumping, and shotcreting.

The first set of components includes alumina and zirconia.