Magnesia brick
This product is fired at high temperature. It is the most important product in alkaline refractories. It has
high refractoriness and is good for iron oxide, alkaline slag and high calcium flux
It is widely used in metallurgical kilns because of its good corrosion resistance.
Magnesia alumina spinel brick
High load soft brick
The product has the characteristics of high load softening temperature and strength, good thermal shock
stability and superior wear resistance. It is mainly used in high temperature parts of large and medium-sized
rotary kilns to replace magnesia chrome bricksIt is also suitable for electric furnace, converter and other main
parts in metallurgical industry.
Kyanite high aluminum products
Red pillar stone brick
Top brick (arch foot brick) for electric furnace and various blast furnaces in metallurgical industry
High alumina unfired furnace top brick
Castables for ladle working layer
Corundum spinel monolithic castable is an amorphous product with corundum as the main raw material,
some spinel or magnesia as the raw material, and cement or micropowder as the binder,It has good integrity
, corrosion resistance and thermal shock stability.
Pyrophyllite brick for ladle
performance | index |
PY-75 | PY-80 | PY-82 |
Apparent porosity AP% | ≤15 | ≤15 | ≤15 |
Bulk density BD g / cm3 | 2.2 | 2.2 | 2.2 |
Compressive strength CCS MPa | 30-40 | 35-45 | 35-45 |
Refractoriness (℃) | 1630 | 1650 | 1650 |
Load softening temperature rul ℃ | 1400 | 1450 | 1450 |
Chemical composition% | SiO2 | ≥75 | ≥80 | ≥82 |
Fe2O3 | ≤0.5 | ≤0.5 | ≤0.5 |
K2O+Na2O | 0.48 | 0.48 | 0.48 |
AL2O3 | 15-20 | ≥13 | ≥12 |
Refractory for tundish permanent layer
High aluminum castable is an amorphous product with high alumina mullite as raw material and cement or
micro powder as binder. It has high strength, especially high medium temperature strength and good thermal
shockThe characteristics of the system.The use of high alumina mullite and aluminum zirconium in tundish
instead of high aluminum castable can significantly improve the service life and improve the safety of tundish.
project | High alumina castable | High alumina mullite preform | Aluminum zirconium preform |
Bulk density (g / cm3) | CHA-2A | CHM-4SB | LZ-1A |
110℃×24h | 2.68 | 2.85 |
Fire resistance | 110℃×24h | 64.5 | 60.5 |
1500℃×3h | 85.7 | ≥70 |
Flexural strength (MPA) | 110℃×24h | 7.0 | — |
1500℃×3h | 12.0 | 12 |
Residual linear expansion (%) | 1500℃×3h | +0.48 | +0.25 |
Chemical composition (%) | Al2O3 | 68.50 | 80 |
ZrO2 | — | — |
SiO2 | 15.60 | 7.35 |
Application site | Side wall | Non slagline | Slag line |
Clay brick
Brands performance | NZ-45 | NZ-40 |
Al2O3，%≥ | 45 | 40 |
Refractoriness, ℃ | 1750 | 1730 |
Load softening temperature rul, t0.6, ℃ | 1400 | 1350 |
Reburning line change (1400 ℃) × 2h),% | -0.4～+0.1 | -0.5～+0.1 |
Apparent porosity,% | 22 | 24 |
Compressive strength CCS, MPa | 30 | 25 |
Thermal shock resistance | Excellent |
Low porosity clay brick
Brand performance | DN-1 | DN-2 |
Apparent porosity,% | 16 | 20 |
Bulk density BD, g / cm3 | ≥2.37 | ≥2.30 |
| Compressive strength CCS, MPa | ≥68 | ≥58.8 |
Refractoriness, ℃ | ≥1730 | ≥1730 |
Load softening temperature rul, t0.6, ℃ | ≥1500 | ≥1470 |
Reburning line change,% | -0.5 | -0.5 |
Chemical composition% | Al2O3 | 55 |
Fe2O3 | ＜1.5 |
SiO2 | 35 |
Refractory castables for various heating furnaces
Brands Performance properties | clay bonded castabIe refractories | Cement bonded refractory castable |
NL-70 | NL-60 | NN-45 | GL-85 | GL-70 | GL-60 |
Al2O3,%, not less than | 70 | 60 | 45 | 85 | 70 | 60 |
Fire resistance, ℃ not less than | 1760 | 1720 | 1700 | 1780 | 1720 | 1700 |
Test temperature with linear change rate less than ± 1% (holding for 3 h), ℃ | 1450 | 1400 | 1350 | 1500 | 1450 | 1400 |
The medium strength MPa of 110 ℃ drying pressure is not less than | 20 | 20 | 20 | 45 | 45 | 40 |
| The compressive strength MPa after burning at 1350 ℃ is not less than | 50 | 40 | 40 | 60 | 55 | 50 |
The bending strength (MPA) after drying at 110 ℃ shall not be less than | 4 | 3 | 2.5 | 5.5 | 5 | 4 |
Unit weight g / cm3 | 2.4 | 2.3 | 2.2 | 2.5 | 2.4 | 2.35 |
Unshaped refractory
project performance | Non drying ramming material for iron ditch | Blast furnace sludge |
1# | 2# |
Al2O3，% | 60 | 65 |
SiO2，% | / | / |
SiC，% | 13 | 13 |
Bulk density (110 ℃) × 24h)BD,g/cm3 | ≥2.3 | ≥2.4 |
Flexural strength mpamor | 110℃×24h | 3 |
1450℃×3h | 5 |
Compressive strength mpaccs | 110℃×24h | 8 |
1450℃×3h | 15 |
Line rate of change, PLC,% | ±0.5 | ±0.5 |
Apparent porosity,% | / | / |
alumina-magnesia refractory castables
This product is made of high bauxite clinker as aggregate, high bauxite clinker and magnesia mixed co grinding
powder as powder, and sodium silicate as binder. It can be used as steel barrelIntegral lining of ladle and tapp
ing tank.
Brands Performance properties | LMJ-70 | LMJ-65 |
Chemical composition,% | Al2O3 | 70 |
MgO | 8 |
Bulk density BD (110 ℃) × 24h）,g/cm3 | 2.6 | 2.5 |
Linear change rate PLC ≤ (110 ℃) × 24h）,% | -0.4 | -0.4 |
Flexural strength mor (110 ℃) × 24h），Mpa | 5.5 | 5.5 |
Compressive strength CCS, (110 ℃) × 24h），Mpa | 40 | 30 |
Maximum service temperature, ℃ | 1720 | 1700 |
Tundish coating
Performance | index |
MgO,% | 80 |
CaO,% | 1 |
bulk density，110℃×16h | 2.1±0.2 |
Compressive strength，Mpa,110℃×16h | ≥4 |
(CCS)1500℃×3h,Mpa | 6 |
Linear rate of change，1500℃×3h | -0.20.5 |
Construction water addition，% | 26～27±3 |
Magnesia ramming material
Performance | index |
MgO,% | 95 |
CaO,% | 1 |
SiO2,% | 2.8 |
Bulk density, apparent porosity1000℃×24 | 24 |
Compressive strength Mpa | 1100℃×24h |
1500℃×3h |
Flexural strength, 1500 ℃ MPa | 8 |
Acid dry vibrating material for tundish
Performance | index |
SiO2,% | ≥87 |
Burn reduction，% | ≤5.0 |
Fire resistance，℃ | ≥1690 |
thermal conductivity，1000℃，W/m.k | ≤0.4 |
bulk density，g/cm3 | 1.5±0.1 |
Flexural strength，240℃×3h | ≥2.5 |
Residual moisture，% | 0 |
Ladle castables
| texture of material | | | Flexural strength Mpa | Compressive strength Mpa | Linear change rate% 1600 ℃ × 3hr |
DNC-90 | Corundum spinel | Al2O3+MgO 90 | 3.0 | 5.0 | 10 | 25 |
DNC-85 | Corundum spinel | Al2O3+MgO 85 | 3.0 | 5.0 | 10 | 25 |
DNC-85A | Alumino magnesian | Al2O3+MgO 85 | 3.0 | 5.0 | 10 | 30 |
DNC-80 | High alumina spinel | Al2O3+MgO 80 | 2.7 | 5.0 | 10 | 30 |
Magnesia based dry vibration material for tundish
Performance | Indicators |
MgO,% | ≥76 |
CaO,% | ≥15.5 |
bulk density g/cm3 | 110℃×24h |
1600℃×3h |
Flexural strength，1500℃×3h Mpa | ≥4.4 |
Linear rate of change，1600×3h | -1.2 |
Corundum products
This product uses fused corundum sand, pure alumina fine powder as the main raw materials, and is made by
mechanical molding, high temperature sintering and other processes. Products with high temperature resistance
, corrosion resistance, thermal shockIt is suitable for petrochemical industry, large and medium ammonia gasifier
and gasifier, steel rolling heating furnace bottom, tapping tank, all kinds of high temperature electric furnace
and molybdenum tungsten wire high temperature furnaceIt can also be used as auxiliary materials in high
temperature, such as sagger, kiln car brick, etc.
Brands Properties | GY-85 | GY-95 |
Chemical composition | Al2O3 % | ≥85 |
Fe2O3 % | ≤0.5 |
Apparent porosity,% | ≤21 | ≤20 |
Bulk density BD, g / cm3 | 3.0 | 3.2 |
Refractoriness, ℃ | 1790 | 1790 |
Compressive strength CCS, MPa | ≥80 | 80-90 |
Starting temperature of softening under load rul, ℃ | ≥1530 | ≥1550 |
Reburning line change,% (1500 ℃) × 3h) | 0.3 | 0.2 |
Gunning (coating) material, coating material
Product name Physical and chemical index | Magnesium gunning coating | High aluminum gunning coating |
MgO,% | ≥90 | — |
Al2O3,% | 2.5 | ≥65 |
Fe2O3,% | — | ≤2.0 |
Bulk density BD (after firing at 1200 ℃), g / cm3 | ≥2 | 2 |
Fire resistance, ℃ | 1780 | 1600 |
Flexural strength Mpa | 110℃Drying (hot state) | ≥4 |
1200℃After burning | 0.5 |
1400℃After burning | — |
Heating line change,% | 1200℃×3h | ±1.0 |
1400℃×3h | — |
Maximum service temperature, ℃ | 1450 | 1400 |
The above two kinds of gunning coatings are suitable for various furnace combustion chambers, regenerators,
inner walls of various hot air pipes, blast furnaces and hot air stoves in metallurgical industry as repairing and
protective layers.
Semi silicon brick for electrolyzer
performance | index |
bulk density，g/cm3 | 2.2 |
Apparent porosity，% | 16-20 |
Compressive strength，Mpa | 30-35 |
Fire resistance，℃ | 1550-1600 |
Load softening temperature，℃ | 1320-1350 |
Linear change rate 1000 ℃ × 2h，% | ±0.2 |
SiO2，% | 65-70 |
AL2O3，% | ≥20 |
Fe2O3，% | ≤1.5 |
Semi silicon brick is used in aluminum electrolytic cell, which has the function of good heat preservation and heating. It can make the electrolytic cell keep stable heat preservation and constant temperature, make the liquid aluminum not easy to form fast and coke, keep the liquid aluminum unblocked, and ensure the quality of aluminum. |
Coke oven cylinder brick
performance | index |
Room temperature compressive strength，Mpa | ≥50 |
Apparent porosity，% | ≤14.5 |
bulk density，g/cm3 | 2.15-2.2 |
Water absorption，% | ≤7 |
SiO2，% | ≥68 |
Fe2O3，% | ≤5 |
Water absorption the material is mainly used for coke oven roof, coke cooling platform, coke quenching tower lining, coke storage bin and so on. |
