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Centrifugal Casting of Refractory Concretes.

PB299600

Publication Date	1979
Personal Author	Marchewka, T. L.; Heystek, H.
Page Count	24
Abstract	As part of its program to conserve the Nation's natural resources by developing improved performance materials, the Bureau of Mines, U.S. Department of the Interior, in cooperation with the U.S. Department of Energy, has conducted an investigation of materials of construction able to withstand the high temperature and hostile environments encountered in coal gasification units. Refractory pipe liners are required when extremely hot gases or abrasive solids are transported between processing units in the gasification plants. One promising technique for producing refractory pipe (or refractory pipe liners) is centrifugal casting. For this study, the effect of processing variables such as workability, additives, reinforcement and spinning time, and centrifugal force were evaluated using four commercial refractory concretes. In addition, data on characteristics such as strength, density, abrasion, and spalling resistance of 5-inch-diam refractory pipe were developed. Techniques for forming large-diameter (19-inch) refractory pipe also were evaluated. The test results indicated that all four refractory concretes could be made into strong, homogeneous pipe, but that optimum casting parameters had to be determined for each specific composition. The investigation revealed that the major controlling factor in the production of the centrifugally cast pipe was the workability of the refractory concrete.
Keywords	Coal gasification Piping systems Refractory concretes Centrifugal casting Ceramics Ceramic pipes Castable refractories Metal fibers Fiber composites
Source Agency	Bureau of Mines
NTIS Subject Category	94G - Manufacturing Processes & Materials Handling 71D - Ceramics, Refractories, & Glass
Corporate Authors	Bureau of Mines, University, AL. Tuscaloosa Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations 1979.
NTIS Issue Number	197925

Centrifugal Casting of Refractory Concretes.

Centrifugal Casting of Refractory Concretes.
PB299600

Publication Date	1979
Personal Author	Marchewka, T. L.; Heystek, H.
Page Count	24
Abstract	As part of its program to conserve the Nation's natural resources by developing improved performance materials, the Bureau of Mines, U.S. Department of the Interior, in cooperation with the U.S. Department of Energy, has conducted an investigation of materials of construction able to withstand the high temperature and hostile environments encountered in coal gasification units. Refractory pipe liners are required when extremely hot gases or abrasive solids are transported between processing units in the gasification plants. One promising technique for producing refractory pipe (or refractory pipe liners) is centrifugal casting. For this study, the effect of processing variables such as workability, additives, reinforcement and spinning time, and centrifugal force were evaluated using four commercial refractory concretes. In addition, data on characteristics such as strength, density, abrasion, and spalling resistance of 5-inch-diam refractory pipe were developed. Techniques for forming large-diameter (19-inch) refractory pipe also were evaluated. The test results indicated that all four refractory concretes could be made into strong, homogeneous pipe, but that optimum casting parameters had to be determined for each specific composition. The investigation revealed that the major controlling factor in the production of the centrifugally cast pipe was the workability of the refractory concrete.
Keywords	Coal gasification Piping systems Refractory concretes Centrifugal casting Ceramics Ceramic pipes Castable refractories Metal fibers Fiber composites
Source Agency	Bureau of Mines
NTIS Subject Category	94G - Manufacturing Processes & Materials Handling 71D - Ceramics, Refractories, & Glass
Corporate Authors	Bureau of Mines, University, AL. Tuscaloosa Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of investigations 1979.
NTIS Issue Number	197925