Zhongzi refractory mortar is a new kind of paste-like bonding material which is formed particularly from specially sorted powder made from the identical raw materials and classification temperatures in light with the brick utilized in furnace and their refractory grades. During the process of production, it undergoes chemical reaction and stirring-up with added inorganic bonding agent and additives. Zhongzi refractory mortar can be classified into four categories according to its service temperature in normal circumstances and they must be used to support the lightweight mullite brick subject to the same class.

Category

Air Setting Refractory Mortar

Grade-23 Grade-26

Thermal-hardness Refractory Mortar

Grade-28 Grade-30

Typical Applications

Necessary auxiliary materials for insulating

firebricks in the furnace lining

Features

High bonding performance for bricks engineering

Excellent sealing capability, resistance to erosion

High refractoriness under load

Outstanding efficiency in reducing the slag

Ensure well-sealed joints for convenient installation

Consistency and bonding effectiveness

Typical Parameters

Description	Grade-23	Grade-26	Grade-28	Grade-30
Chemical Composition(%)
Al₂O₃	≤40	≤53	≤60	≤70
Fe₂O₃	≤1.2	≤1.0	≤0.9	≤0.6
Physical Properties
Classification Temperature(℃)	1300	1400	1500	1550
Brick’s Grade for Application	23	26	28	30
Tensile Strength(MPa)	3.9	4.0	5.0	4.2
Refractoriness under load(℃)	1320	1420	1550	1600

The data shown are average results of tests under standard procedures and are subject to variation. Results should not be used for specification purposes or creating any contractual obligation. For more information on the safety application or materials, please refer to the work practices and material safety data sheet.