Refractory Bricks Manufacturer

Large rotary kilns are mostly lined with refractory bricks . The main methods for lining construction are as follows. Template Method The template method is mostly suitable for circumferential continuous joint masonry. See the diagram below: Figure: Schematic diagram of  rotary kiln lining construction  using the template method (circumferential continuous joint lining) The lining is constructed from the lowest point of the cross-section in two circumferential directions. When the height exceeds the kiln's centerline, a mold is set up, and the lining is closed from both directions towards the highest point of the cross-section, with support provided as construction progresses until the locking is complete. The mold shown in the diagram is a relatively simple one, entirely manual, resulting in low construction efficiency. To improve efficiency, many companies have adopted pneumatic support rings. The equipment has two rows of pneumatic support devices, significantly improving c...

Specifications of high-alumina refractory bricks. High-alumina refractory bricks refer to a type of aluminum silicate refractory material with an alumina content of 48% or higher. They are made from bauxite or other high-alumina raw materials through forming and calcining. They have high thermal stability and a refractoriness above 1770°C. They also have excellent slag resistance. Contact Rongsheng Refractory for detailed dimensions of high-alumina refractory bricks . Introduction to Special-Shaped High-Alumina Bricks High-alumina special-shaped bricks are refractory products with specific, non-standard shapes, made primarily from high-alumina bauxite clinker through meticulous processing and specialized molding techniques. Their alumina content varies depending on the grade, typically ranging from 55% or higher. They are designed to meet the specialized refractory shape and performance requirements of complex structural components in various industrial furnaces. They occupy a crucial...

Porosity is an important indicator of refractory bricks. It is one of the reference indicators for thermal shock resistance, mechanical strength, volume stability, thermal conductivity, etc. Therefore, when choosing refractory bricks, we need to pay special attention to porosity. 1. What is Porosity? Terminologically, porosity is also called "apparent porosity," which is the ratio of the volume of open pores in a refractory material to its total volume. Lightweight Insulating Bricks of High Porosity 2. The Impact of Porosity on Refractory Materials Porosity is inversely proportional to thermal shock resistance, mechanical strength, and volume stability. Higher porosity reduces strength, but increased porosity also reduces the thermal conductivity of refractory bricks, making them more suitable for insulation in high-temperature kilns. Regarding thermal shock resistance, higher porosity in refractory bricks can lead to uneven internal thermal expansion at high temperatures, re...

Mullite insulation bricks are high-alumina refractory materials with mullite (3Al₂O₃·2SiO₂) as the primary crystalline phase. Their alumina (Al₂O₃) content typically ranges from 65% to 75%, resulting in excellent high-temperature resistance and thermal insulation properties. They are available in three different bulk densities: 0.8 g/cm³, 1.0 g/cm³, and 1.2 g/cm³, suited to varying temperatures and operating conditions. Mullite Insulation Bricks Characteristics of Mullite Insulation Bricks  Excellent Thermal Insulation: Mullite insulation bricks have low thermal conductivity, effectively reducing heat loss, improving kiln insulation , and reducing energy consumption.  Low heat capacity, energy-saving and high efficiency. Due to its low thermal conductivity, this material stores less heat energy, making it particularly suitable for intermittent kilns (such as shuttle kilns), significantly reducing heating energy consumption and improving thermal efficiency.  High refracto...

High thermal conductivity graphite bricks used for blast furnace bosh to furnace body are well used in blast furnaces due to their outstanding features such as good thermal conductivity and high temperature strength, low porosity and ash content, and excellent alkali resistance. They meet the use requirements of blast furnaces. In the production process of high thermal conductivity graphite bricks , the process route is determined and controlled as follows. Production Process of Graphite Bricks Using appropriate formulas, according to the requirements of physical and chemical indicators of finished products, combined with the actual production of artificial graphite, the following process route is determined: coke-calcination-crushing (grinding)-batch-mixing (adding binder asphalt)-extrusion molding-roasting-primary impregnation-secondary roasting-secondary impregnation-third roasting-graphitization-processing. Rongsheng Graphite Bricks Supplier Process Control (1) Control of calcinati...

Calcium silicate, also known as microporous calcium silicate, refers to a porous thermal insulation material made from the CaO-SiO2-H2O ternary system. It is a new type of thermal insulation material. In the CaO-SiO2-H2O system, there are currently 22 known minerals. However, there are only two types of thermal insulation materials widely used in industry, namely Xonotlite and Tobermorite. The chemical formula of the former is close to 6CaO·6SiO₂·HO. The chemical composition of its actual product is as follows: SiO2 46.3%, Al2O3 0.3%, CaO 43.3%, MgO 0.7%, Fe2O3 2.5%, and ignition loss 5.9%. The maximum operating temperature of this product is 1000℃. The chemical formula of Tobermorite is close to 5CaO·6SO₂·5H2O. The chemical composition of an actual product is as follows: SiO2 44.4%, Al2O3 3.7%, CaO 4.7%, MgO 0.6%, Fe2O3 1.8%, and ignition loss 13.8%. Tobermorite has a layered structure, and the interlayer distance of 11.3A is called 11ÁTobermorite, and the interlayer distance of 14Á i...