Self-baked carbon bricks for calcium carbide furnaces are made of high-temperature treated anthracite as the main raw material and are made through a high-frequency vibration molding process. They are used to build the bottom of large and medium-sized calcium carbide furnaces and the lining of the melting pool.
Self-Baking Carbon Bricks for Calcium Carbide Furnaces
Self-baked carbon bricks are divided into two categories according to the capacity of the calcium carbide furnace transformer. The first category is suitable for calcium carbide furnaces greater than or equal to 10000kVA, code-named TKZ-1. The second category is suitable for calcium carbide furnaces less than 10000kVA, code-named TKZ-2.
Surface quality of self-baked carbon bricks
- 1) The surface of the carbon brick should be flat, and no local deformation, protrusions, cracks and oil defects are allowed.
- 2) Corner missing: depth not greater than 10mm and not more than 1.
- 3) Edge missing: length not greater than 50mm, depth not greater than 5mm and not more than 1.
- 4) Distortion: not greater than 1mm on the masonry surface of the carbon brick.
The cross-sectional structure of the self-baked carbon brick should be uniform, without stratification, local looseness, voids and dry material defects.
Carbon Brick Standards and Performance Guide
Carbon Brick Size and Deviation:
- The height tolerance of carbon bricks at the bottom and side of the furnace wall is ±3 mm, and the width tolerance is ±5 mm.
- For carbon bricks without free end faces, the length tolerance is ±5 mm; for carbon bricks with free ends, the length tolerance is ±10 mm.
Carbon Brick Crack and Notch Standards:
- The width of the crack on the carbon brick is less than 0.5 mm, the length is less than 200 mm, and there are no more than two cracks on each side.
- The length of each side of the cross-edge crack is no more than 100 mm.
- The width of the single notch and bee eye on the carbon brick shall not exceed 20 mm and the depth shall not exceed 10 mm.
Carbon brick size specifications:
- 400*400*400-1800mm
- 400*500*400-2500mm
- 600*650*600-2000mm
- 800*800*800-1900mm
The length can be customized according to customer needs, and various models and specifications of special-shaped carbon blocks and furnace mouth carbon blocks can be processed.
Performance requirements of carbon bricks:
- Fixed carbon ≥50%
- Silicon carbide content 15-22%
- Volume density ≥1.7g/cm³
- Apparent porosity ≤20%
- Compressive strength ≥42MPa
- Ash content ≤7%
- Flexural strength 6.86MPa
Semi-graphite silicon carbide carbon bricks ensure efficient operation of your industrial furnaces! Contact the Rongsheng Manufacturer for detailed information.
