Henan Hongtai Kiln Refractory Co.,Ltd.
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Corrosion-resistant Chrome Corundum Bricks for industry kiln
Description of Chromium corundum brick
The main mineral composition of Chromium corundum brick is prun-Al2o3-cr2o3 solid solution.The secondary mineral composition is a small amount of composite spinel (or non-composite spinel), and the content of chromium oxide is 1% ~ 30% of firebrick.There are two types of fused cast Chromium corundum brick and sintered Chromium corundum brick.Chromium corundum brick in general refers to sintered Chromium corundum brick.
α-Al2O3 was taken as the raw material, and a moderate amount of chromic oxide powder and fine powder of chrome corundum clinker were added.The content of chromic oxide in sintered chrome brick is generally lower than that of fused cast Chromium corundum brick.Moreover, the gray-pouring method can be used to prepare the gray-Al2o3 powder and chromium-oxide powder, and the grain-Al2o3 powder can be mixed uniformly, and the grout can be made by adding degumming agent and organic binder, and some chrome-corundum clinker can be added at the same time.It can be used as lining of glass kiln, screwing glass liquid flow hole cover plate brick, as backing lining of iron water pretreatment device, waste incinerator, coal water slurry pressurized gasifier, etc.
Specifications of chrome corundum bricks
| Al2O3 % | ≤ | 80 | 68 | 38 |
| Cr2O3 % | ≥ | 12 | 30 | 60 |
| Fe2O3 % | ≤ | 0.5 | 0.2 | 0.2 |
| Bulk Density (g/cm3) | ≥ | 3.3 | 3.53 | 3.63 |
| Cold Crushing Strength (Mpa) | ≥ | 120 | 130 | 130 |
| Apparent Porosity % | ≤ | 18 | 16 | 14 |
| Refractoriness under Load 0.2Mpa | ≥ | 1700 | 1700 | 1700 |
| Permanent Linear Change(%) 1600Cx3h | -0.2+0.2 | -0.2+0.2 | -0.2+0.2 |
Application Scope of Chromium corundum brick
At present, the application of Chromium corundum brick has more extensive application, a kind of Chromium corundum brick is made from metal chrome slag as the main raw material, this product is widely used in zinc smelting electric furnace, volatile kiln, Chromium corundum brick has excellent thermal vibration stability and high temperature creep performance, simultaneously conforms to the requirements of national circulation economy.
In recent years, Chromium corundum bricks are mainly used in high temperature kilns such as synthetic ammonia gasifier and carbon black reactor.The throat pipe of a carbon black reactor furnace introduced by a carbon black factory was replaced by chrome-corundum brick of our hospital, which was used for more than 4 months. The furnace stopped for inspection and the inner diameter was maintained well. No melting or cracking was found.At present, the service life of furnace lining can reach 10~15 months.
1. Strong professional:
Our company has thirty years producing experience in refractory products. Our manager will supervise on a various refractorys production materials, process control, quality supervision and package delivery, and ensure the products are 100% qualified.
2.Annual supply:
Our company has passed ISO9001 quality management system certification and SGS certification. And the annual supply of shaped and unshaped refractory product is 28, 800-35, 000 tons.
3. Export experiences:
Now we have gained a global sales network reaching Taiwan, Russia, Vietnam, Pakistan, Bulgaria, French, India, Congo, Angola, South Africa, and so on.
4. Production equipment:
Production and testing equipments are new, complete and automated or semi- automated. Such modern facilities and equipments have provided the fine technical guarantee for the production and testing.
5. Testing equipment:
Our company's testing equipments as follows:
High Temperature RUL Tester
Bulk Density Tester
The Pressure Tester
Refractoriness Tester
Certificates