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Sialon-bonded magnesium aluminate spinel refractory material for rotary cement kiln and preparation method
The invention relates to a sialon-bonded magnesium aluminate spinel refractory material for a rotary cement kiln and a preparation method and belongs to the field of refractory materials. The chemical formula of utilized sialon is Si(6-Z)AlZOZN(8-Z), wherein Z is equal to 1. The sialon-bonded magnesium aluminate spinel refractory material comprises the following raw materials: high-purity magnesia, alumina micropowder, silicon nitride and metal aluminum powder, and phenolic resin serves as a bonding agent. The preparation method comprises the steps of weighing the raw materials according to the proportion during production, mixing to obtain pug, carrying out compression molding, drying at 80-200 DEG C for 24-36 hours, and carrying out nitriding and sintering at 1200-1500 DEG C. According to the preparation method, by utilizing a sialon-bonded phase generated by a reaction based on the in situ synthesis of magnesium aluminate spinel, the refractory material has the following excellent physical property indexes: the apparent porosity is 12%-18%, the volume density is 2.80g/cm<3>-3.20g/cm<3>, the normal temperature compression strength is 110MPa-240MPa, and the refractoriness under load (0.2MPa*0.6%) is more than or equal to 1680 DEG C; meanwhile, the refractory material has good thermal shock resistance, excellent wear resistance, erosion resistance and structural flexibility, great market potential and good social benefit and is applicable to a transitional zone of the rotary cement kiln at a severe environment.
Sialon-bonded magnesium aluminate spinel refractory material for rotary cement kiln and preparation method
The invention relates to a sialon-bonded magnesium aluminate spinel refractory material for a rotary cement kiln and a preparation method and belongs to the field of refractory materials. The chemical formula of utilized sialon is Si(6-Z)AlZOZN(8-Z), wherein Z is equal to 1. The sialon-bonded magnesium aluminate spinel refractory material comprises the following raw materials: high-purity magnesia, alumina micropowder, silicon nitride and metal aluminum powder, and phenolic resin serves as a bonding agent. The preparation method comprises the steps of weighing the raw materials according to the proportion during production, mixing to obtain pug, carrying out compression molding, drying at 80-200 DEG C for 24-36 hours, and carrying out nitriding and sintering at 1200-1500 DEG C. According to the preparation method, by utilizing a sialon-bonded phase generated by a reaction based on the in situ synthesis of magnesium aluminate spinel, the refractory material has the following excellent physical property indexes: the apparent porosity is 12%-18%, the volume density is 2.80g/cm<3>-3.20g/cm<3>, the normal temperature compression strength is 110MPa-240MPa, and the refractoriness under load (0.2MPa*0.6%) is more than or equal to 1680 DEG C; meanwhile, the refractory material has good thermal shock resistance, excellent wear resistance, erosion resistance and structural flexibility, great market potential and good social benefit and is applicable to a transitional zone of the rotary cement kiln at a severe environment.
Sialon-bonded magnesium aluminate spinel refractory material for rotary cement kiln and preparation method
LI YONG (Autor:in) / LIN XIN (Autor:in) / LI CHUANJING (Autor:in)
08.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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