- Email: [email protected]
Protective coating for furnace electrodes
Feb., i915. ]
PUBLICATIONS RECEIVED. PUBLICATIONS
257
RECEIVED.
U. S. Bureau of Mines: Bulletin 77, The Electric Furnace in Metallurgical Work, by Dorsey A. Lyon, Robert M. Keeney, and Joseph F. Cullen. 216 pages, illustrations, 8vo. Technical Paper 94, Metal-mine Accidents in the United States during the Calendar Year 1913, compiled by Albert H. Fay. 73 pages, 8vo. Fourth Annual Report of the Director of the Bureau for the Fiscal Year Ended June 30, 1914. IOI pages, 8vo. Washington, Government Printing Office, 1914. Canada Department of Mines, Mines Branch: Gypsum in Canada: its Occurrence, Exploitation, and Technology, by L. H. Cole. 256 pages, illustrations, plates, maps, 8vo. Ottawa, Government Printing Bureau, 1913. The Production of Coal and Coke in Canada during the Calendar Year 1913, by John McLeish, B.A., Chief of the Division of Mineral Resources and Statistics. 4o pages, 8vo. Ottawa, Government Printing Bureau, I9I 4. Armour Institute of Technology: Bulletin, May, 1914, General Information Number. 199 pages, plate, 8vo. Chicago, Institute, 1914. University of the State of Iowa: Bulletin, New Series, No. 87, University Extension Bulletin No. 8, Water Works Statistics of Thirty-eight Cities of Iowa, with the Meter Rates of Seventy Cities, by John H. Dunlap. 52 pages, 8vo. Iowa City, University, 1914. The Water Power Problem in the United States, by Rome G. Brown. Reprinted from the Yale Law Journal, November, 1914. 33 pages, 8vo. Harrison Safety Boiler Works, Cochrane Multiport Valves. 72 pages, illustrations, 8vo. Philadelphia, Harrison Safety Boiler Works, 1914. American Pulley Company, Data Sheets. 36 pages, illustrations, 4to. Philadelphia, The American Pulley Company, 1914.
P r o t e c t i v e C o a t i n g f o r F u r n a c e E l e c t r o d e s . (Metallurgical and Chem. Engin., xii, 5 3 3 . ) - - S . H. F l e m i n g p r o p o s e s to p r o d u c e a coating of t i t a n i u m n i t r i d e on f u r n a c e electrodes a n d o t h e r r e f r a c t o r y m a t e r i a l s . T i t a n i u m n i t r i d e is stable at high t e m p e r a t u r e s , is nonp o r o u s , tough, a n d h a r d , a n d o t h e r w i s e possesses qualities t h a t m a k e it v a l u a b l e as a p r o t e c t i v e c o a t i n g f o r substances t h a t a r e s u b j e c t e d to v e r y h i g h t e m p e r a t u r e s in an electric o r o t h e r furnace. I n o r d e r to f o r m a c o a t i n g a m i x t u r e of futile a n d some', b i n d e r is p r e s s e d on the a r t i c l e to be coated, w h i c h is then b a k e d at a high t e m p e r a t u r e in the p r e s e n c e of nitrogen. O w i n g to the g r e a t affinity o f T i f o r n i t r o gen, the f o r m e r is c o n v e r t e d into nitride. A first c o a t i n g of t i t a n i u m c a r b i d e m a y be desired, as this s u b s t a n c e wets c a r b o n a n d enters t h e p o r e s of its e x t e r i o r s u r f a c e a n d f o r m s a p e r f e c t union with the carbon. T h i s m a y be f o r m e d by a p p l y i n g a m i x of t i t a n i u m a n d c a r b o n a n d h e a t i n g w i t h exclusion of air, f o r m i n g t i t a n i u m carbide. A f t e r t h e c o a t i n g o f c a r b i d e is f o r m e d t h e article m a y be h e a t e d in an a t m o s p h e r e o f nitrogen, thus c o n v e r t i n g p a r t of t h e c a r b i d e into nitride. T h i s l a t t e r c o n v e r s i o n m a y be s t o p p e d b e f o r e all of the carbide has been c h a n g e d , if an i n n e r c o a t i n g of c a r b i d e is desired.
PUBLICATIONS RECEIVED. PUBLICATIONS
257
RECEIVED.
U. S. Bureau of Mines: Bulletin 77, The Electric Furnace in Metallurgical Work, by Dorsey A. Lyon, Robert M. Keeney, and Joseph F. Cullen. 216 pages, illustrations, 8vo. Technical Paper 94, Metal-mine Accidents in the United States during the Calendar Year 1913, compiled by Albert H. Fay. 73 pages, 8vo. Fourth Annual Report of the Director of the Bureau for the Fiscal Year Ended June 30, 1914. IOI pages, 8vo. Washington, Government Printing Office, 1914. Canada Department of Mines, Mines Branch: Gypsum in Canada: its Occurrence, Exploitation, and Technology, by L. H. Cole. 256 pages, illustrations, plates, maps, 8vo. Ottawa, Government Printing Bureau, 1913. The Production of Coal and Coke in Canada during the Calendar Year 1913, by John McLeish, B.A., Chief of the Division of Mineral Resources and Statistics. 4o pages, 8vo. Ottawa, Government Printing Bureau, I9I 4. Armour Institute of Technology: Bulletin, May, 1914, General Information Number. 199 pages, plate, 8vo. Chicago, Institute, 1914. University of the State of Iowa: Bulletin, New Series, No. 87, University Extension Bulletin No. 8, Water Works Statistics of Thirty-eight Cities of Iowa, with the Meter Rates of Seventy Cities, by John H. Dunlap. 52 pages, 8vo. Iowa City, University, 1914. The Water Power Problem in the United States, by Rome G. Brown. Reprinted from the Yale Law Journal, November, 1914. 33 pages, 8vo. Harrison Safety Boiler Works, Cochrane Multiport Valves. 72 pages, illustrations, 8vo. Philadelphia, Harrison Safety Boiler Works, 1914. American Pulley Company, Data Sheets. 36 pages, illustrations, 4to. Philadelphia, The American Pulley Company, 1914.
P r o t e c t i v e C o a t i n g f o r F u r n a c e E l e c t r o d e s . (Metallurgical and Chem. Engin., xii, 5 3 3 . ) - - S . H. F l e m i n g p r o p o s e s to p r o d u c e a coating of t i t a n i u m n i t r i d e on f u r n a c e electrodes a n d o t h e r r e f r a c t o r y m a t e r i a l s . T i t a n i u m n i t r i d e is stable at high t e m p e r a t u r e s , is nonp o r o u s , tough, a n d h a r d , a n d o t h e r w i s e possesses qualities t h a t m a k e it v a l u a b l e as a p r o t e c t i v e c o a t i n g f o r substances t h a t a r e s u b j e c t e d to v e r y h i g h t e m p e r a t u r e s in an electric o r o t h e r furnace. I n o r d e r to f o r m a c o a t i n g a m i x t u r e of futile a n d some', b i n d e r is p r e s s e d on the a r t i c l e to be coated, w h i c h is then b a k e d at a high t e m p e r a t u r e in the p r e s e n c e of nitrogen. O w i n g to the g r e a t affinity o f T i f o r n i t r o gen, the f o r m e r is c o n v e r t e d into nitride. A first c o a t i n g of t i t a n i u m c a r b i d e m a y be desired, as this s u b s t a n c e wets c a r b o n a n d enters t h e p o r e s of its e x t e r i o r s u r f a c e a n d f o r m s a p e r f e c t union with the carbon. T h i s m a y be f o r m e d by a p p l y i n g a m i x of t i t a n i u m a n d c a r b o n a n d h e a t i n g w i t h exclusion of air, f o r m i n g t i t a n i u m carbide. A f t e r t h e c o a t i n g o f c a r b i d e is f o r m e d t h e article m a y be h e a t e d in an a t m o s p h e r e o f nitrogen, thus c o n v e r t i n g p a r t of t h e c a r b i d e into nitride. T h i s l a t t e r c o n v e r s i o n m a y be s t o p p e d b e f o r e all of the carbide has been c h a n g e d , if an i n n e r c o a t i n g of c a r b i d e is desired.