Analysis of High Bauxite Clinker Quotes
High alumina bauxite clinker is calcined bauxite. Generally,before Alumina Bauxite in the production of high alumina refractory bricks are the calcined, get clinker, that is, barren material. With this High alumina bauxite clinker as the aggregate in the ingredients, can guarantee the volume stability of the refractory bricks and the size of the accurate. China's bauxite is mostly D-K type, in the calcination process to be decomposed dehydration, secondary mullite and re-crystal sintering three stages. The calcined mineral composition forms corundum, mullite and glass phase according to the ratio of Al2O3 and SiO2 in the raw material. High bauxite clinker is gray, light yellow and dark gray. It is mainly used to produce high alumina refractory bricks, can also be used to make fused corundum.
The two major causes of sintering of high alumina bauxite are secondary mullite and liquid phase effects.
The former depends on the Al2O3 ratio, which hinders the sintering effect; the latter promotes sintering.
In addition Fe2O3, TiO2 into the corundum and mullite lattice solid phase reaction, but also help to promote the role of sintering. At 1200 ℃, the second mullite petrochemical reaction is basically completed, and the liquid phase promotes the dissolution and precipitation process of the grains, which leads to densification. , The promotion of sintering is the main.
The Al2O3 / SiO2 ratio of grade Ⅱ bauxite is close to 2.55, which is the mullite constituent area, and the second mullite is the most.
The sintering temperatures of bauxite at all levels are as follows:
Special grade 1600 ~ 1700 ℃,
Class I is 1500 ~ 1600 ℃,
Class II is 1600 ~ 1700 ℃,
Ⅲ grade 1500 ~ 1550 ℃.
Production of different grades of high alumina refractory bricks need different high bauxite clinker. The bauxite clinker is classified according to the content of Al2O3 and the content of Fe2O3, TiO2, CaO, MgO, K2O and Na2O2O and the bulk density and water absorption of clinker.
The two major causes of sintering of high alumina bauxite are secondary mullite and liquid phase effects.
The former depends on the Al2O3 ratio, which hinders the sintering effect; the latter promotes sintering.
In addition Fe2O3, TiO2 into the corundum and mullite lattice solid phase reaction, but also help to promote the role of sintering. At 1200 ℃, the second mullite petrochemical reaction is basically completed, and the liquid phase promotes the dissolution and precipitation process of the grains, which leads to densification. , The promotion of sintering is the main.
The Al2O3 / SiO2 ratio of grade Ⅱ bauxite is close to 2.55, which is the mullite constituent area, and the second mullite is the most.
The sintering temperatures of bauxite at all levels are as follows:
Special grade 1600 ~ 1700 ℃,
Class I is 1500 ~ 1600 ℃,
Class II is 1600 ~ 1700 ℃,
Ⅲ grade 1500 ~ 1550 ℃.
Production of different grades of high alumina refractory bricks need different high bauxite clinker. The bauxite clinker is classified according to the content of Al2O3 and the content of Fe2O3, TiO2, CaO, MgO, K2O and Na2O2O and the bulk density and water absorption of clinker.
Tradematt (Henan) Industry Co., Ltd. is a modernized comprehensive enterprise integrating research, manufacture, export and technical service of various types of refractory materials all over the world. Our products: high alumina refractory brick, clay refractory brick, lightweight insulating refractory brick ,AZS bricks, mullite refractory bricks, Corundum brick, Magnesia brick etc.
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