Henan Hongtai Kiln Refractory Co.,Ltd.
PROFESSIONAL MANUFACTURE REFRACTORIES FOR FURNACE ！
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Alkali Resistant Magnesite Chrome Brick Stable Magnesia Chrome Brick
Description of Magnesite-chrome bricks
Magnesite-chrome bricks are refractory products containing magnesium oxide (MgO) and chromium oxide (Cr2O3) as the main components, and periclase and spinel are the main mineral components. This type of brick has high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and certain adaptability to acidic slag.
Instructions for use of Magnesite-chrome bricks
Magnesite-chrome bricks are mainly used in metallurgical industries, such as the construction of open hearth furnace roofs, electric furnace tops, furnace refining furnaces, and various non-ferrous metal smelting furnaces. The high temperature part of the ultra high power electric furnace wall is made of fused cast Magnesite-chrome bricks. The high erosive area of the refining furnace outside the furnace is made of Magnesite-chrome bricks made of synthetic material.
Features of Magnesite-chrome bricks
The refractoriness is greater than 2000 °C, the softening temperature under load is generally above 1550 °C, the high temperature volume stability is good, and the rapid cooling and heating resistance is good.
Application field of Magnesite-chrome bricks
Mainly used for cement rotary kiln, glass kiln regenerator, steelmaking furnace lining, refining ladle permanent layer, non-ferrous metallurgical furnace, lime kiln, mixing furnace and refractory high temperature furnace lining, etc.; also used for open hearth furnace top, electric furnace Furnace top, refining furnace outside the furnace and various non-ferrous metal smelting furnaces.
Classification of Magnesite-chrome bricks
(1) Ordinary Magnesite-chrome bricks
(ie silicate combined Magnesite-chrome bricks), this kind of brick is made of chrome ore and magnesia with more impurities (SiO2 and CaO). The firing temperature is not high, around 1550°C.
(2) Directly bonded Magnesite-chrome bricks
are made of chromium concentrate with low impurity content and relatively pure magnesia. The firing temperature is above 1700°C. The structural feature of this kind of refractory brick is that the refractory crystal grains are mostly in direct contact.
(3) Recombined Magnesite-chrome bricks
are combined with Magnesite-chrome bricks. Magnesite-chrome bricks made from artificial synthetic raw materials co-sintered magnesia chromium materials or fused magnesia chromium materials (or partly fused magnesia) are called recombined Magnesite-chrome bricks.
(4) Semi-recombined Magnesite-chrome bricks
which are made of artificial synthetic raw materials as granules, and chromium concentrate and magnesia as fine powder, should be called semi-recombined magnesia-chrome bricks.
(5) Casting Magnesite-chrome bricks
are made of magnesia and chrome ore with a certain amount of additives, mixed, compacted and bisque-fired, broken into pieces, melted in the electric arc furnace, injected into the mold, and annealed to produce master bricks
Technical datas of Magnesite-chrome bricks
| Brand | DMC-40 | DMC-20 | DMC-12A | DMC-12B | DMC-8A | DMC-8B | |
| MgO% | ≥ | 30 | 60 | 70 | 65 | 70 | 70 |
| Cr2O3% | ≥ | 10 | 20 | 12 | 12 | 8 | 8 |
| SiO2% | ≤ | 1 | 1 | 2 | 3 | 2 | 3 |
| Bulk Density (g/cm3) | ≥ | 3.3 | 3.15 | 3.05 | 3 | 3 | 3 |
| Apparent Porosity % | ≤ | 16 | 16 | 18 | 20 | 18 | 20 |
| Cold Crushing Strength (Mpa) | ≥ | 40 | 40 | 40 | 35 | 40 | 35 |
| Refractoriness under Load T0.6 (°C) | ≥ | 1700 | 1700 | 1650 | 1600 | 1650 | 1600 |
| Thermal shock resistance | ≥ | 40 | 40 | 40 | 40 | 40 | 40 |
Packaging of Magnesite-chrome bricks
1.on wooden pallets with plastic cover: wooden pallet size :930*930 or 1000*1000mm,
2.load weight of each pallet: 1.5-2.0 tons,
3.230*114*65mm:512PCS/Pallet, 230*114*75mm:448PCS/Pallet.
Shipping of Magnesite-chrome bricks
1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quanlity and quantity guaranteed, and also in accordance with the contract and customer's requirment completely.
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