A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
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 (author) / LIN XIN (author) / LI CHUANJING (author)
2015-04-08
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Calcium hexaluminate-magnesium aluminate spinel multiphase refractory material for glass kiln
| European Patent Office | 2021
Magnesium aluminate spinel refractory material and preparation method thereof
| European Patent Office | 2021
Magnesium aluminate spinel refractory material and preparation method thereof
| European Patent Office | 2020
| European Patent Office | 2022