Anchors are non-metallic or metal parts installed on the furnace shell or the steel structure supporting the lining, and are embedded in the lining to act as anchors and connections, and are called refractory anchors. It is an important part of modern monolithic refractory linings and a key technical measure to improve the service life of linings.
Refractory anchors are divided into two categories: metal anchors and non-metal anchors. These include supports, thrusters, and anchor nails. Hanging bricks are also anchoring bricks. The technical requirements for refractory anchor bricks are high strength and good thermal stability. Therefore, three-level clinker is generally used as the raw material and fired at high temperatures. For example, the chemical composition of high alumina anchor bricks in a certain factory is Al2O3≥50% and SiO2≥46%. The refractoriness is 1750℃, the strength is 3.8MPa, and the linear expansion coefficient at 1200℃ is 5.8X10-6K-1. At 1450℃, the re-burning linear change is +0.1%, and the load softening start temperature is 1430℃.
There are various shapes and connection methods of anchor bricks( https://rsrefractoryfirebrick.com/refractory-anchor-brick/ ), and their sizes are also different. The most commonly used anchor bricks have lengths of 330, 380, 440, and 500 mm, and the thickness is generally about 100 mm. It is mainly used for refractory castable linings. In refractory plastic linings, shapes without holes are generally used.
Metal anchors are generally made of ordinary steel, heat-resistant steel is the best, but it increases the cost of thermal equipment. Metal supports and thrusts are generally made of heat-resistant cast steel.
Metal anchors are easily oxidized at high temperatures, so they should be buried in the lining. The distance between the hot end and the working surface of the lining body depends on the thickness of the attached body and the operating temperature, generally 20-200mm.
Metal anchors are generally welded to the furnace shell and have various shapes. The most commonly used shapes are Y, V, L. There are also several shapes of support and thrust. The former is used in higher furnace walls, and the latter is used in furnace roofs with steep slopes.
The installation holes or necks of the anchor bricks shall not have cracks and the dimensions shall be accurate. The welding between the metal anchor and the furnace shell shall be fully welded, and no false welding or missing places shall be allowed. The dimensions should also be accurate. Ceramic fiber blankets and metal anchors for refractory fiber linings are also available in various shapes and sizes. Its function is mainly to fix the refractory fiber lining body.
Customized Refractory Anchor Bricks – Professional Production of Anchor Bricks
Rongsheng refractory materials‘ manufacturer not only provides customers with various types of standard refractory bricks but also can customize the size of refractory bricks to meet customer needs according to the specific needs of customers. Similarly, for a variety of anchor products, thermal insulation products, and the skeleton structure of refractory castable lining-refractory anchor brick products, we can customize high-quality products and services for customers according to their specific needs. If the refractory lining of your thermal furnace equipment needs to be repaired or you want to purchase refractory products, please contact us. We will provide you with the most satisfactory service according to your specific needs. We will be your satisfied supplier.