Alkali Products

1. Refractory materials of Magnesite brick series
Magnesia brick is one of the important type of refractories used by the ferrous, non-ferrous, and building material industries. Re-burned magnesia is used as a raw material to make common magnesia bricks, middle-grade sintered magnesia for middle-grade magnesia bricks, high temperature oil shaft kiln-fired magnesia for calcinations of high-quality magnesite bricks, and fused magnesia to make re-bonded magnesite bricks.
The rebonded magnesite bricks produced in China use high-quality fused magnesia as its raw material; the highest grade contains MgO in excess of 98%, with large crystal granules and high chemical stability. It is especially suited to harsh working conditions like high temperature and heavy erosion.

2. Periclase-spinel brick series

Periclase-spinel bricks are made of high purity sintered magnesia and (or) fused synthetic spinel clinker, molded at high shaping pressure and fired at high temperature. During the process of high temperature firing, secondary spinel forms that is helpful in reinforcing the toughness and erosive resistance of the spinel bricks.

Periclase-spinel bricks can be applied to large cement rotary kilns, non-ferrous smelting and other industrial furnaces as per the different contents of spinel phase.

3. Refractory materials of magnesite chrome brick series:

With properties like excellent adaptability to high temperature, resistant to erosion and permeability, and better thermal shock resistance, magnesite chrome bricks find wide usage by the ferrous, non-ferrous, and building materials industries for lining high temperature industrial kilns and furnaces.

Direct bonded magnesite chrome bricks, made of Chinese-origin high purity sintered magnesia (MgO ≥ 97%, Bulk density ≥ 3.25g/cm3), combined with high quality chrome ore and (or) high purity synthetic magnesia chromite clinker, molded at high shaping pressure and fired at high temperature, result in high-temperature properties, high rate of direct bonding, strong resistance to erosion and good thermal shock resistance.

4. Refractories of rebonded magnesia-chrome brick series
Semi-rebonded magnesia-chrome brick are made of high purity fused magnesia clinker; chrome ore concentrate and fused synthetic magnesia-chrome clinker; it is rebonded to magnesia-chrome brick of mainly high purity fused magnesia chromite clinker and mixed with fused magnesia clinker.

Semi-rebonded magnesia-chrome bricks and rebonded magnesia-chrome bricks are especially suited for RH and non-ferrous furnaces as such bricks can substantially increase the wetting angle of high-temperature molten slag in refractory lining resulting in extremely high penetration resistance and high erosion resistance.  

5. Magnesia-calcia refractories

Magnesia-calcia bricks are made of high quality synthetic magnesia-calcia clinker in different MgO/CaO proportioning ratios depending on different requirements of different furnaces and kilns. To avoid slaking, the sintered magnesia-calcia bricks, out of sintering, are immediately soaked into the pitch or paraffine under vacuum in a pressurized condition, and sealed in thermoplastic packages.

The magnesia-calcia brick have excellent high temperature properties and resist slag penetration especially applicable to refining furnaces such as AOD and VOD furnaces and at burning zone of the large cement kilns.

6. Magnesia-zircon based refractories
Magnesia-zirconia bricks are made of high purity fused magnesia and synthetic magnesia-zirconia clinker, formed at high shaping pressure and fired at high temperature. Periclase is main crystal phase of the aggregate in such bricks, with the forsterite wrapping baddeleyite structure formed after reaction-sintering at its base. The material is mainly applied to regenerators of glass kilns, and has strong anti-corrosion properties against the high temperatures with basic phase long life of more than 10 years.

7. Pleonaste brick  

The Pleonaste brick is a kind of high quality basic refractory. It contains 7-9% Fe2O3, very small content of SiO2 and CaO, and small content of Cr2O3.

The Pleonaste bricks, as specifically used in the burning zone of large cement kilns, can quickly form a firm coating to protect the bricks from corrosion at high temperature and liquid phase ensuring a safe and stable operation of cement kiln, with a long service life.,For example, a 1200-day service life was achieved with a 4000t/d  capacity cement kiln; more than 4-6 times that of other types of refractory.

8. Forsterite brick

Magnesia and natural forsterite ore are the selected raw material to make forsterite bricks. By adjusting the MgO/SiO2 ratio in its base material, an enriched structure is formed in the forsterite crystal phase which resists erosion more than magnesia bricks.

Forsterite bricks are mainly used in the regenerator of the glass kiln, non-ferrous metallurgical furnaces, and the permanent lining of the steelmaking  industrial furnaces.

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