Magnesia Iron Alumina Spinel Brick for cement industry
Product Overview
Magnesia alumina spinel brick is an advanced refractory material. Generally, Mg-Al spinel refractory refers to the general structure of MgAl2O4 or MgO-Al2O3, that is, the magnesium aluminum spinel is prepared from high-purity materials, has good corrosion resistance, thermal shock stability. The amount of spinel content in the production of magnesia aluminum spinel brick should keep a proper level. As spinel amount increases, the thermal shock resistance is better, but the strength (especially the flexural strength) is caused by the mismatch expansion. The Al2O3 in the product should not be more than 15%~20%, preferably 10%~18%.
Application
Magnesia alumina spinel brick is widely used in non-ferrous metal smelting furnace, steel-nickel furnace, aluminum-smelting furnace lining, electric furnace cover, steel drum lining, high-temperature zone in cement kiln, glass furnace kiln wall, etc.Specification should be different according to different furnaces/kilns, standard shapes and customized drawings are acceptable.
Chemical & Physical Data Of Magnesia Alumina Spinel Brick
| index item | magnesia-alumina brick | magnesia-alumina spinel brick | Periclase-spinel brick | high-purity mag-alumina brick |
| ML-80A | ML-808 | LMJ-A | LMJ-C | LMJ-C | LPJ-80A | LPJ-80B | LCML-86 |
| MgO% | 80 | 80 | 80 | 75 | 70 | 82 | 80 | 86 |
| AL2O3% | 5~10 | 5~10 | 8~15 | 8~15 | 8~15 | 5~10 | 5~10 | 5~10 |
| 0.2MPa refractoriness under load 0C ≥ | 1600 | 1580 | 1700 | 1650 | 1600 | 1620 | 1600 | 1700 |
| cold crushing strength MPa ≥ | 45 | 40 | 35 | 35 | 35 | 39.2 | 39.2 | 35 |
| apparent porosity % ≤ | 18 | 20 | 17 | 18 | 19 | 18 | 18 | 16 |
| thermal shock resistance (11000C-water) times ≥ | | | 20 | 15 | 10 | 7 | 5 |
Our company
Refractory products are used extensively in heat-treatment facilities for petrochemical, steel metallurgy, non-ferrous metallurgy, glass, construction materials, chemical fertiliser and ceramics industries. Rare earth products of the Group are mainly exported to the United States of America, Japan, Europe and Korea, and its refractory products are mainly for domestic sales and export to Japan.
The Group has a research and development centre that focus on improving existing products and developing new products. Building and maintaining relationships with clients and exploring new businesses are the responsibility of its talented sales and marketing department. Concerning the environmental protection as well as the market needs, the Group will continue to develop environmental friendly and high value-added products.
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