Regarding the problem of refractory brick masonry, there are many conventional steps, these steps generally cannot be ignored in the process of refractory brick masonry. Because this affects the working conditions of the entire thermal kiln. For example, refractory mortar is required to be coated on refractory bricks built on boilers. So, what kind of mortar is generally used for chimney refractory brick masonry? Is it possible to use ordinary masonry mortar? Questions and answers about refractory brick masonry, the following will be a good answer.
 |
| RS Refractory Bricks for Sale |
Masonry of Refractory Bricks in Cement Kiln
Initially, when people used vertical kilns to burn cement clinker, due to the small size of the kiln and the low calcination temperature, only a single clay brick containing 30-40% Al2O3 was used. The initial rotary kiln was improved on this experience and used high alumina bricks and clay bricks. Since the 1960s, due to the large-scale and enhanced operation of the kiln, the high-temperature kiln lining has generally been constructed with alkaline bricks. The main varieties are magnesia chrome brick, spinel brick, and dolomite brick.
The Role of Refractory Brick Lining for Cement Kiln
- 1. Prevent direct damage to the kiln body caused by high-temperature flame or air current, and protect the kiln body.
- 2. Prevent the erosion of the kiln body by harmful substances (CO, SO2);
- 3. Prevent the corrosion of materials and airflow to the kiln body;
- 4. Reduce the temperature of the kiln body to prevent the kiln body from being oxidized and corroded;
- 5. It has the function of heat storage and heat preservation;
- 6. It can improve the performance of kiln hanging.
Requirements for Masonry Mortar of Refractory Bricks for Chimneys
What kind of mortar is generally used for chimney refractory brick masonry? First of all, we must choose according to the material of refractory bricks. The manufacturer will provide matching products when purchasing refractory bricks. For specific information, you can consult the refractory brick manufacturer. Refractory selection recommendations, relevant technical guidance, and provide samples. Refractory manufacturers http://www.aluminabricks.com/ generally provide a full range of refractory services.
Can ordinary masonry mortar be used for construction? It is not recommended, because ordinary masonry mortar does not have acid resistance and corrosion resistance, which will affect the service life of chimneys and refractory bricks. In addition, acid-resistant cement or refractory cement is generally used, and it is divided into one-component and two-component. Acid-resistant cement used in rare cases.
 |
| Refractory Bricks Lining for the Rotary Kiln |
Refractory bricks masonry method
1. Refractory brick-flat laying method
The flat-laying method is mostly used for the furnace wall, and a few are used for the bottom layer of the furnace bottom. In our country, the most common method of flat laying is the "one smooth and one top" brick wall. Annular bricklaying (like the wall of a blast furnace) is also flat laid.
2. Refractory bricks-side laying method
The side-laying method is mainly used in two parts. One is to pave the bottom of the bricklayer, such as the bottom of the open hearth and heating furnace. The second is side arches, such as open-hearth tapping arches.
3. Refractory bricks-vertical laying method
Vertical masonry, also called vertical masonry, is mainly used in two parts. One is the uppermost layer of the furnace bottom, such as the open hearth and blast furnace bottom. The second is the working layer of the furnace bottom, such as the open hearth.
Take the straight standard brick as an example. When laying flat, its largest plane is placed in a horizontal position. When laying on the side, the side (also called the middle, 230x65 mm) is placed in a horizontal position. When laying vertically, the small face is placed in a horizontal position.
Precautions for the Masonry of Refractory Bricks
The top of the refractory brick lining should be fully attached to the surface of the cylinder, and no cracks should be left. Thorough contact should be made between the large surfaces of adjacent single bricks. The width of the polished refractory brick shall not be less than 50% of the original brick, and the thickness shall not be less than 80% of the original brick. Iron hammers cannot be used during construction. Prevent the following phenomena from refractory bricks: inverted heads and sizes, lottery, mixing, dislocation, inclination, uneven ash joints. Climbing, de-centering, re-stitching, mouth opening, voiding, hairy seam, snaking, brick bulging, missing edges, few corners, etc. http://www.aluminabricks.com/refractory-related-products/refractory-mortar-for-sale/.
