High Quality and Competitive Price of Magnesium Aluminum Spinel Brick Manufacturers

Magnesium-aluminum spinel brick refers to a class of minerals of the same structure. The chemical formula can be expressed as AO-R2O3 (or AR2O4), where A represents a divalent element ion, which may be Mg2+, Fe2+, etc.; R is a trivalent element. It can be Al3+, Fe3+, Cr3+, and the like. Most of them exist in the form of isomorphous solid solutions.

 

All spinels expand by lattice to form a solid solution. Spinel refractories can be classified into chrome bricks, chrome-magnesia bricks, magnesia-chromium bricks, and magnesium-aluminum spinel refractories according to the raw materials and compositions thereof. It is an important class of neutral or weakly alkaline refractory materials, widely used in high temperature industrial furnaces, open furnaces, electric furnaces, ladle, refining outside the furnace, cement rotary kiln, glass kiln regenerator, copper smelting furnace and so on.

 

Such refractory materials include chrome bricks, chrome-magnesia bricks and magnesia-chrome bricks; chrome spinel (or its solid solution) and periclase are the main mineral components. The chrome refractory is usually composed of chrome ore and caustic magnesia. Or add pure peridotite. Chromite can be used to make bricks directly. The chromite ore is finely ground and mixed with 5% of light burnt magnesia fine powder, shaped, dried, and fired at 1550 ° C to obtain chrome brick.

Magnesium-aluminum spinel (also known as spinel) has a chemical formula of MgO-A12O3, containing 28.3% of MgO, 71.7% of A1203, and a melting point of 2135 °C. Compared with magnesia-chrome bricks, magnesium-aluminum spinel has the main advantages of high corrosion resistance to reducing atmosphere, free CO 2 , free SO 2 /S03 and free K 2 O/Na 2 O, as well as good thermal stability and wear resistance. .

 

Spinel refractories can be divided into three categories: periclite-spinel refractory, A12O3 content < 30%; spinel one magnesite refractory, A1203 content is 30% ~ 68%; spinel The refractory material has an A12O3 content of 68% to 73%.

 

As the China refractory brand of Zhengzhou Sunrise Refractory, it not only pays attention to the expansion of its own scale, but more importantly, it always stands in the long-term development perspective and continuously develops new types of refractory materials, so as to continuously meet more stringent market demands and conform to the times. The development of the trend. Sunrise Refractory specializes in producing all kinds of high-aluminum bricks, refractory bricks, clay bricks, castables and other products. Welcome customers to visit the factory and establish long-term cooperative relationship.