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Preparation method of composite phase combined magnesium-base unshaped refractory material applied to bottom of electric furnace
The invention relates to a preparation method of a composite phase combined magnesium-base unshaped refractory material applied to the bottom of an electric furnace. The material is prepared from the following raw materials in parts by weight: 95-99 parts of a synthetic ball prepared from dolomite dust and iron oxide powder and 1-5 parts of desilicated zirconia, wherein the percentage of the dolomite dust MgO+CaO is larger than or equal to 80%; the percentage of the iron oxide powder Fe2O3 is larger than 98%; the percentage of the desilicated zirconia ZrO2 is larger than 98.5%; the preparation method comprises the following concrete steps: (1) preparing a dolomite dust-iron oxide powder synthetic ball by using the dolomite dust and the iron oxide powder; (2) processing the dolomite dust-iron oxide powder synthetic ball into fine powder with different particle sizes and mixing in proportion; (3) uniformly mixing and stirring the dolomite dust-iron oxide powder synthetic ball mixed powder and desilicated zirconia micro-powder of which the size is 325 meshes, and packaging a finished product in a bag. The preparation method disclosed by the invention has the advantages of improving the stability of material volume and preventing the problems of cracking, peeling and blocking of a steel discharging opening at the furnace body. By adding a special modifying agent desilicated zirconia and adopting a dolomite dust and iron oxide powder compounding technology, crystal type transformation, generated during material cooling, of the raw materials, is inhibited; surface pulverization of the furnace bottom is solved when the furnace is shut down; the service life of the material is further obviously prolonged.
Preparation method of composite phase combined magnesium-base unshaped refractory material applied to bottom of electric furnace
The invention relates to a preparation method of a composite phase combined magnesium-base unshaped refractory material applied to the bottom of an electric furnace. The material is prepared from the following raw materials in parts by weight: 95-99 parts of a synthetic ball prepared from dolomite dust and iron oxide powder and 1-5 parts of desilicated zirconia, wherein the percentage of the dolomite dust MgO+CaO is larger than or equal to 80%; the percentage of the iron oxide powder Fe2O3 is larger than 98%; the percentage of the desilicated zirconia ZrO2 is larger than 98.5%; the preparation method comprises the following concrete steps: (1) preparing a dolomite dust-iron oxide powder synthetic ball by using the dolomite dust and the iron oxide powder; (2) processing the dolomite dust-iron oxide powder synthetic ball into fine powder with different particle sizes and mixing in proportion; (3) uniformly mixing and stirring the dolomite dust-iron oxide powder synthetic ball mixed powder and desilicated zirconia micro-powder of which the size is 325 meshes, and packaging a finished product in a bag. The preparation method disclosed by the invention has the advantages of improving the stability of material volume and preventing the problems of cracking, peeling and blocking of a steel discharging opening at the furnace body. By adding a special modifying agent desilicated zirconia and adopting a dolomite dust and iron oxide powder compounding technology, crystal type transformation, generated during material cooling, of the raw materials, is inhibited; surface pulverization of the furnace bottom is solved when the furnace is shut down; the service life of the material is further obviously prolonged.
Preparation method of composite phase combined magnesium-base unshaped refractory material applied to bottom of electric furnace
WANG XIANGFENG (author) / QIU WEI (author) / WANG WEI (author)
2015-06-10
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Unshaped refractory material and preparation method thereof
| European Patent Office | 2015
Unshaped refractory material and preparation method thereof
| European Patent Office | 2015