Refractory Material Specifications
Because each refractory has a specific task inherent to its design, Gold Coast Refractory strives to stay current with the latest material innovations, in order to always ensure finest materials are used for the task at hand.
During a typical refractory material analysis and selection process, Gold Coast will assist in developing high quality refractory material specifications for the necessary job, incorporating the requirements for each material. Is the material a new or replacement part? Material chemical composition, thermal expansion, shrinkage, abrasion or corrosive resistance, compressive or tensile strength, and thermal conductivity, as well as other physical properties related to the use of the refractory material will be reviewed.
Our material specialists will discuss the requirements with the client and make recommendations that offer choices of the best material alternatives based on:
- Refractory Fill
- Product Type/Form
- Bond/Binder
- Setting/Cure Technology
- Application
Refractory materials should not only be able to withstand high temperature, but also sudden change in temperature, the chemical and abrasive action of plates, and the load at service conditions. Keeping this in mind, Gold Coast will select the refractory material after thorough discussions with the client regarding the specific application, and all material with which the refractory will be in contact.
Based on the material specifications and the requirements of the application, Gold Coast will utilize the following kinds of refractory products:
Acidic refractories, which include substances such as alumina, silica, and fire clay brick refractories. Reagents that can attack alumina and silica are phosphoric acid, hydrofluoric acid, and fluorinated gases. Because they may react with limes and basic oxides at high temperatures, they are not recommended for use at high temperatures.
Neutral refractories are used in areas where slags and atmosphere are either acidic or basic and are chemically stable to both acids and bases. Examples of these materials are alumina (Al2O3), chromia (Cr2O3), and carbon.
Basic refractories are used on areas where slags and atmosphere are basic; they are stable to alkaline materials but could react with acids. The main raw materials belong to the RO group, of which magnesia (MgO) dolomite and chrome-magnesia are examples.
