Where High Strength Wear Resistant Castables are Suitable for Use
01. Frontier Overview
High-strength abrasion-resistant castables are suitable for use in the severe abrasion parts of industrial kilns. They are denser and more resistant to abrasion than the general refractory castables, and they can withstand the impact at high temperatures and carry soft and large loads of shear resistance.
Abrasion-resistant castables are characterized by resistance to pressure, folding, and wear. This has a certain relationship with the process of Scooby-Doo and the raw materials used. The raw materials used in the wear-resistant material have high aluminum content and high bulk density, and the particles in the process ratio are also larger than the general material. Adding a certain proportion of silicon carbide compound in the process can improve the folding and wear resistance of the castable.
02. Performance Of Wear-Resistant Castables
Wear-resistant castables can increase the tensile capacity and better use effect if a reasonable proportion of steel fiber is added. When producing, adding heat-resistant stainless steel fiber to the aggregate and powder can prevent the rise difference under the high-temperature state, and can resist the stress caused by the change of temperature gradient when starting and stopping the furnace, and due to the addition of steel fiber, the integrity of the furnace wall after casting also increases the ability to hold position. If the stainless steel added is nickel-plated stainless steel, it is more resistant to high temperatures, and can also enhance the anti-rolling performance, enhance fatigue resistance.
03. Distinction between different body density indexes of wear-resistant castables
High-strength wear-resistant castables are also distinguished by different body densities and indexes, which are chosen according to the furnace temperature and furnace atmosphere.
03. Where is the most suitable place for wear-resistant castables?
High strength abrasion resistant castables are most suitable for use in the front and rear arch walls of various boilers, as well as in the walls of waste incinerators, and composite abrasion-resistant castables are often used in electric furnace covers, heating furnace bottoms, cement rotary kiln kilns, stall rings, and other parts.
What is The Role of Anchor Bricks in The Use of Refractory Castables?
Anchor bricks play a skeleton role in refractory castables. Anchor bricks have another name: hanging bricks.
Several products play a skeleton role in refractory castables: one is the anchor brick, another is the anchor piece, and the third is the tortoise mesh. Anchor pieces and tortoise mesh are metal products, only the anchor brick is a refractory product.
1. Shape and linking method of anchor bricks
There are many shapes and links of anchor bricks, and their sizes vary. In general, they are made according to the customer’s customization. There is also a part of the regular length of 330, 380, 440, and 500m thickness is generally around 100mm anchor brick, its role is in the role of the refractory castable liner.
2. Anchor bricks have the difference between with and without holes
There is a difference between anchor bricks with and without holes, and the difference between the use with holes and the use without holes for the furnace roof and furnace wall. The use is embedded in the casting material, and there is also a hanging piece hanging up, so it can be called a hanging brick.
The anchor is directly welded to the furnace shell, and when the refractory castable is poured, the anchor is buried in the liner to play the role of anchoring and connection.
The most commonly used ones are Y, V, and L shaped, the height is determined by the thickness of the refractory castable if the thickness of the castable is 200mm, the height of the anchor can be 160-180mm, the anchor is easily oxidized under high temperature when buried in the castable liner, it depends on the thickness of the liner and the use temperature.
Anchor bricks are refractory bricks made of raw materials technically proportioned, then molded, then sintered, with high strength, good thermal shock stability, and toughness. However, the mold of anchor bricks is a difficult part of the production process, the grinding tool is complex and difficult to make, and the mold cost is much higher than the general refractory bricks.
Anchor bricks if with holes, installation holes are generally in the neck. The finished anchor brick should not have cracks and the size should be accurate. Convenient for use in the furnace roof. Anchor bricks generally use three-grade high alumina more, because three-grade high alumina anchor brick has toughness. Although the first-grade high alumina brick has good quality, the hardness also increases, and it is easy to crack when it is used in the general pouring material.
3. What is the role of anchor bricks in the castables?
The anchor brick plays the role of skeleton connection in the castable, which is made according to the user’s requirement when producing, but there must be no cracks, which will easily fall off and affect the use of refractory castables.