Complaint
Blast furnace carbon block,Carbon Bricks is a kind of carbon block used for laying the bottom, hearth and body of blast furnace.
Blast furnace carbon brick is divided into blast furnace semi graphite carbon brick, blast furnace microporous carbon brick and blast furnace carbon composite brick , According to different parts of blast furnace lining. Blast furnace carbon brick of different materials has different physical and chemical indexes and bulk density :
1. Blast furnace semi-graphitized carbon brick is generally used to build blast furnace bottom, and its bulk density is 1.5g/cm3;
2. Blast furnace microporous carbon brick is generally used for the masonry of blast furnace hearth and wall. According to the different parts used, the bulk density is 1.65-1.7g/cm3;
3. Blast furnace carbon composite brick is generally used for the masonry of blast furnace ceramic cup. According to different physical and chemical indexes, its bulk density is 2.7-2.85g/cm3;
The density of blast furnace carbon brick is one of the important reference indexes for customers to purchase carbon brick. The physical and chemical indexes of carbon brick for different purposes are different, and the bulk density requirements are also different.
There are two factors affecting the bulk density of blast furnace carbon brick: one is the particle size and bulk density of refractory raw materials of blast furnace carbon brick; The other is the control of production process. Therefore, in the production of blast furnace carbon brick, it is necessary to strictly screen the grade of raw materials and control the particles, control the pressure of brick press during the production process, and reasonably control the firing of blast furnace carbon brick.
When purchasing blast furnace carbon bricks, it is necessary to provide more physical and chemical indicators, such as the content of main components, compressive strength, flexural strength, etc., in order to understand whether blast furnace carbon bricks can really be used in industrial kilns.
| ITEMS | UNIT | Semi-Graphite Brick | Graphite Brick | Ultra-High Heat Conductive Graphite brick | High Heat Conductive Graphite brick | Microporous Carbon brick | Utra Microporous Carbon brick | |
| Fixed carbon | ≥ | % | / | 98 | 99.5 | / | / | / |
| Ash | ≤ | % | 10 | 0.5 | 0.2 | 7 | 20 | 23 |
| Bulk Density | ≥ | g/cm3 | 1.55 | 1.52 | 1.65 | 1.60 | 1.62 | 1.68 |
| Porosity | ≤ | % | 20 | 25 | 20 | 18 | 18 | 17 |
| Real Density | ≥ | g/cm3 | 1.90 | 1.92 | 2.10 | / | 1.90 | 1.90 |
| Compressive Strength | ≥ | Mpa | 30 | 20 | 30 | 30 | 36 | 38 |
| Flexural Strength | ≤ | Mpa | 8.0 | 6 | 11 | 8 | 9 | 9 |
| Phgreatic corrosion index | ≤ | % | 32 | / | 32 | 30 | 30 | |
| Average Hole Radius | ≤ | μm | 1.25 | / | / | 0.5 | 0.1 | |
| ≤1μm pore volume | ≥ | % | 30 | / | / | 70 | 80 | |
| Oxidation rate | % | 20 | / | 20 | 28 | 8 | ||
| Permeability | mDa | 50 | / | 70 | 9.0 | 1 | ||
| Thermal Conductivity | Room temperature | W/m.k | 6 | 80 | 100 | 20 | 7 | / |
| 300ºC | 9 | 60 | 80 | / | 10 | 16 | ||
| ºC | 12 | / | / | 25 | 14 | 20 | ||
| Alkali Resistance | U OR LC | / | U | U OR LC | U | |||
The raw materials for the production of blast furnace carbon block are anthracite and metallurgical coke (sometimes adding pitch coke and graphitization metallurgical coke or graphite chips). The technological process of producing BF carbon block is the same as that of producing side carbon block and low carbon block, but the proportioning formula (particle composition and coal asphalt consumption) is different. The machining of BF carbon block is much more complicated than that of side and bottom carbon block. The carbon blocks of blast furnace are all customized in sets. When ordering, the drawings of carbon blocks of different shapes and installation drawings of each horizontal layer are attached. Because the gap of BF carbon block masonry is not more than 1mm, the machining accuracy and finish must reach a high level. After each layer of carbon block is processed separately, it needs to be pre installed in the manufacturer according to the drawings, check whether it meets the installation requirements, and then label in turn, and then pack and ship.
SIZE OF THE BRICK/BLOCK :
400*400(400-1800MM) ,400*500*(400-2500MM) ,600*650*(600-2000MM) ,800*800*(800-1900MM) Length can cuztomized .
According to customer requirements, we can process various types and specifications of special-shaped carbon blocks and furnace mouth carbon blocks
