Refractory Mortar- High Alumina Refractory Mortar

Refractory materials are essential for the stable operation of various thermal furnaces. As the "heart" of a thermal furnace, the configuration and quality of refractory materials determine its service life and production efficiency. The rapid development of various industries has placed higher demands on refractory materials, which has also promoted the development and technological advancement of refractory materials for thermal furnaces. RS High Alumina Refractory Factory supplies high-alumina refractory mortar. Contact RS High Alumina Refractory Factory for a free quote now!

High Alumina Refractory Mortar

High-alumina refractory mortar is primarily used in industries such as metallurgy, building materials, machinery, chemicals, and power generation. Specifically, it is used in industrial thermal furnaces for the masonry of clay bricks, high-alumina bricks, and corundum bricks. High-alumina refractory mortar offers full mortar joints, excellent airtightness, high bond strength, superior high-temperature performance, and a flexible application timeframe, making it suitable for jointing and repairing various industrial furnaces. In addition, high-alumina refractory slurries are widely used in winter construction projects and projects with tight deadlines due to their high early strength, high temperature resistance, and corrosion resistance. These applications demonstrate the important role high-alumina refractory slurries play in improving industrial production efficiency and ensuring project quality.

RS High-Alumina Refractory Mortar

RS high-alumina refractory mortar complies with the standard GB/T 2994-2021, "High-Alumina Refractory Mortar." This document applies to refractory mortars with an alumina content greater than or equal to 50% for the masonry of high-alumina refractory bricks and corundum bricks. The document specifies the terms and definitions, classification and designation, technical requirements, test methods, quality assessment procedures, packaging, marking, transportation, storage, and quality certification of high-alumina refractory mortars. High-alumina refractory mortar specifications.

High-alumina refractory mortars can be divided into ordinary high-alumina refractory mortars, phosphate-bonded high-alumina refractory mortars, and phosphate-corundum refractory mortars. High-alumina refractory mortars are joint materials made primarily from high-alumina bauxite clinker, with the primary bonding mechanism being the gelling action of bonding clay and a small amount of admixtures. Phosphate-bonded high-alumina refractory mortar is a joint material made of high-alumina bauxite clinker as the main raw material and phosphoric acid or aluminum dihydrogen phosphate solution as the chemical binder. Phosphate-bonded corundum refractory mortar is a joint material made of corundum and high-alumina bauxite clinker as the main raw materials and phosphoric acid or aluminum dihydrogen phosphate solution as the chemical binder. According to the alumina content, it is divided into 3 categories and 7 grades:

(1) Ordinary high-alumina refractory mortar: LN-50, LN-70.

(2) Phosphate-bonded high-alumina refractory mortar: LN-70P.

(3) Phosphate-bonded corundum refractory mortar: LN-70P, GN-80P, GN-90P.

L, N, and G are the Chinese initials of aluminum, mud, and corundum, respectively. The numbers following them represent the mass percentage of alumina. P represents phosphate-bonded refractory mortar.

Requirements for Refractory Mortar in Refractory Brick Masonry

(1) The working conditions of the mortar in the joints of refractory masonry bricks are exactly the same as those of refractory bricks. Therefore, the main technical indicators of the two, refractoriness and chemical composition, should also be the same or compatible.

(2) The type and brand of mortar should be selected by the designer based on the working conditions of the furnace.

(3) The type and composition of mortar generally used for refractory products.

Before refractory masonry is laid, the consistency of the mortar and the amount of water added should be determined through tests based on the type of masonry. The masonry types suitable for mortars of different consistencies are: in recent years, finished mortars with admixtures have been widely used, basically eliminating the original ordinary refractory mortar.