A coke oven is composed of a charring chamber, a combustion chamber, a heat storage chamber, a ramp area, a roof, a foundation, a flue and so on. A coke oven usually has dozens of carbonization and combustion chambers configured one after another, separated by refractory materials. Each combustion chamber has 20 to 30 standing fire channels. Preheated gas (high calorific value gas is not preheated) and air from the heat storage room meet and burn at the bottom of the risers to provide heat to the charring chamber from the side.
1、ramp: clay brick, lightweight insulation brick
2、Furnace roof: clay bricks, lightweight insulation bricks
3、Furnace wall: silica bricks
4、Heat storage room: clay bricks, silica bricks, lightweight insulation bricks
5、Carbonization chamber/combustion chamber: Silicon bricks
6、Furnace door: pre-assembly bricks (cordierite material)
Dry quenching coke oven is a cooling device different from coke oven. Red coke is loaded from the top of the dry quenching oven, and low-temperature inert gases (e.g., nitrogen) are drummed by the circulating fan into the red coke layer of the dry quenching oven's cooling chamber to absorb the red coke's heat, and this process reduces the coke's temperature to less than 180°C. The dry quenching oven is designed to cool the coke in the dry quenching chamber by using an inert gas. The cooled coke is discharged from the bottom of the dry quenching oven, while the high temperature inert gas from the ring flue of the dry quenching oven flows through the dry quenching boiler, where it exchanges heat with water to produce steam, which can be used to generate electricity or drive other industrial equipment.
1、Furnace mouth: mullite silicon carbide bricks
2、Pre-storage room: clay bricks, mullite bricks
3、Ramp: mullite silicon carbide bricks, mullite bricks
4、Ring duct: mullite bricks, clay bricks
5、Cooling room: mullite bricks, clay bricks, wear-resistant castable
6、Others: wear-resistant castable, lightweight insulation castable
| Item | silica brick | Zero Expansion Silica Brick | Furnace door precast brick | clay brick | Lightweight insulation brick | ||
| JG-94 | FS-97 | JNZ-35 | JNZ-40 | NG-1.0 | LG-1.0 | ||
| SiO2；% | ≥94 | ≥97 | / | / | / | / | / |
| Al2O3；% | ≤1.5 | ≤0.5 | ≥50 | ≥35 | ≥40 | ≥30 | ≥42 |
| Fe2O3；% | ≤1.5 | ≤0.3 | / | ≤2.5 | ≤2 | ≤2 | ≤1.5 |
| Apparent porosity；% | ≤22 | ≤22 | ≤28 | ≤24 | ≤22 | ≤1.0 | ≤1.0 |
| Bulk density；g/cm3 | ≥1.8 | ≥2.1 | ≥2.1 | ≥2.0 | ≥1.15 | ≤1.0 | ≤1.0 |
| Cold crushing strength；Mpa | ≥35 | ≥30 | ≥35 | ≥30 | ≥40 | ≥3.5 | ≥3.5 |
| 0.2MPa refractoriness-under-load/℃ | ≥1650 | ≥1600 | / | ≥1350 | ≥1380 | / | / |
| Real density；g/cm3 | ≤2.33 | / | / | / | / | / | / |
| Residual quartz；% | ≤1 | / | / | / | / | / | / |
| Permanent Linear Change On Reheating；% | 1350℃×2h －0.4～0 |
1450℃×2h 0.2～0 |
/ | 1350℃×2h －0.4～0 |
1380℃×2h －0.4～0.1 |
1200℃×12h -2～1 |
1400℃×12h -2～1 |
| Application | Combustion chamber, carbonization chamber | Coke Oven Hot Repair | furnace door | Heat storage room, flue | Furnace roof and wall insulation | ||
| Item | Clay brick | Mullite Brick AM | Mullite brick BM | Mullite-Silicon Carbide Brick AT | Mullite-Silicon Carbide Brick BT | Silicon nitride bonded silicon carbide brick |
| SiC；% | / | / | / | ≥35 | ≥30 | ≥72 |
| Fe2O3；% | ≤1.6 | ≤1.3 | ≤1.3 | ≤1.2 | ≤1.2 | ≤0.7 |
| Al2O3；% | ≥40 | ≥55 | ≥55 | ≥30 | ≥40 | / |
| Refractoriness；℃ | ≥1690 | ≥1770 | ≥1770 | ≥1770 | ≥1770 | ≥1790 |
| Apparent porosity；；% | ≤22 | ≤18 | ≤17 | ≤17 | ≤21 | ≤17 |
| Bulk density；g/cm3 | ≥2.15 | ≥2.40 | ≥2.45 | ≥2.45 | ≥2.50 | ≥2.65 |
| Cold crushing strength；Mpa | ≥30 | ≥65 | ≥75 | ≥85 | ≥75 | ≥150 |
| 0.2MPa refractoriness-under-load/℃ | ≥1350 | ≥1500 | ≥1500 | ≥1500 | ≥1600 | / |
| Permanent Linear Change On Reheating；% （1350℃×2h） |
+0.1～-0.5 | +0.2～-0.3 | +0.2～-0.3 | +0.2～-0.3 | +0.2～-0.3 | / |
| Thermal shock stability (1100°C water-cooled)；bout |
≥8 | ≥20 | ≥15 | ≥22 | ≥30 | ≥50 |
| Abrasion resistance | Good | Good | Good | Excellent | Excellent | Excellent |
| Application | Loading area and non-working layer | Reserved segment cooling section circulation device |
Reserved segment cooling section circulation device |
Ramp area Furnace mouth part |
Ramp area Furnace mouth part |
Ramp area |
Coking
Refractory materials for Blast furnace
Refractory materials for casting
Hot blast stove
Pretreatment of Liquid Iron
