The intermediate-temperature strength of refractory castables refers to the strength at approximately 800℃-1000℃. For most castable series, the intermediate-temperature strength at 800℃ is the most problematic, as this is when the bond strength of the refractory castable is weakest. The Read More …
Author: Refractorymaterials
Preparation Method of Acid-Resistant Refractory Castable
The general composition of acid-resistant refractory castables is as follows: 60%-70% acid-resistant refractory aggregate, 30%-40% powder, and 13%-16% water glass solution with a density of 1.38-1.42 g/cm3. When sodium fluorosilicate is used as a hardening accelerator, its addition amount is Read More …
Requirements for High-Chromium Bricks in Coal-Water Slurry Gasification Furnaces
To address the problems of low coal utilization and severe environmental pollution, pressurized coal-water slurry gasification, as a crucial technology for the clean and efficient utilization of coal, has experienced rapid development. Hundreds of units, including the Texaco coal-water slurry Read More …
Magnesia-Iron-Alumina Composite Spinel Bricks — Chrome-Free Refractories for Cement Kiln Burning Zones
Pollution within the cement industry caused by refractory materials is primarily attributed to chromium-bearing refractories. The main pathways for this contamination are twofold: First, during the calcination of cement clinker, the presence of an oxidizing atmosphere and alkaline oxides—combined with Read More …
Selection of Refractory Linings for Flash Smelting Furnaces
The flash smelting furnace is a large-scale non-ferrous metallurgical furnace and constitutes one of the most critical pieces of equipment in a smelter. During operation, to fulfill production quotas and achieve favorable technical and economic results, the furnace cannot be Read More …
Advantages of the Physicochemical Properties of Thermal-Insulating Silicon-Corundum Bricks
Silicon-corundum bricks are developed based on the phosphate-bonded brick series; they are manufactured by utilizing higher-quality bauxite with an increased alumina content, incorporating a specific proportion of silicon carbide, and undergoing processes of batch aging, high-pressure molding, and sintering at Read More …
The Influence and Role of Andalusite in Cement Kiln Mouth Refractory Spraying Mixes
At the front kiln mouth of a rotary kiln, the temperature of the discharged clinker reaches approximately 1100°C, while the temperature of the tertiary air entering the kiln fluctuates frequently in response to changing kiln conditions. As the scale of Read More …
Application of β-SiAlON-Bonded Alumina Bubble Bricks in Nitriding Furnaces
To extend the service life of nitriding furnaces, thermal insulation products based on alumina hollow spheres—featuring a bonding phase of approximately 30 wt% β-SiAlON—were fabricated using alumina hollow spheres, Si powder, Al powder, and fine and ultrafine Al₂O₃ powders as Read More …
Causes of Corrosion and Wear of High-Chrome Bricks Inside the Gasifier
The GE coal-water slurry gasifier uses SA387 Grade 11 ClasS2 steel for its shell (including the combustion chamber and quench chamber) and forgings. After normalizing and tempering refining and vacuum degassing, it exhibits excellent high-temperature strength, oxidation resistance, and sulfide Read More …
Aluminate Refractory Cement Also Known As High-Alumina Cement
Aluminate refractory cement, designated CA, is a hydraulic cementitious material made by grinding aluminate refractory cement clinker. Also known as high-alumina cement, it is renowned for its rapid hardening, early strength, resistance to acidic and saline corrosion, low-temperature hardening, and Read More …
