(navigation image)
Home American Libraries | Canadian Libraries | Universal Library | Community Texts | Project Gutenberg | Biodiversity Heritage Library | Children's Library | Advanced Microdevices Manuals | Linear Circuits Manuals | Supertex Manuals | Sundry Manuals | Echelon Manuals | RCA Manuals | National Semiconductor Manuals | Hewlett Packard Manuals | Signetics Manuals | Fluke Manuals | Datel Manuals | Intersil Manuals | Zilog Manuals | Maxim Manuals | Dallas Semiconductor Manuals | Temperature Manuals | SGS Manuals | Quantum Electronics Manuals | STDBus Manuals | Texas Instruments Manuals | IBM Microsoft Manuals | Grammar Analysis | Harris Manuals | Arrow Manuals | Monolithic Memories Manuals | Intel Manuals | Fault Tolerance Manuals | Johns Hopkins University Commencement | PHOIBLE Online | International Rectifier Manuals | Rectifiers scrs Triacs Manuals | Standard Microsystems Manuals | Additional Collections | Control PID Fuzzy Logic Manuals | Densitron Manuals | Philips Manuals | The Andhra Pradesh Legislative Assembly Debates | Linear Technologies Manuals | Cermetek Manuals | Miscellaneous Manuals | Hitachi Manuals | The Video Box | Communication Manuals | Scenix Manuals | Motorola Manuals | Agilent Manuals
Search: Advanced Search
Anonymous User (login or join us)
Upload
See other formats

Full text of "Metallurgy Of Cast Iron"

32                          METALLURGY   OF   CAST   IRON.
by bosh, tap, and flue cinder. Mill cinder is generally used first because it can often be purchased for about one-half the price of iron ore and because it often contains a large percentage of iron.
Tap cinder is of two varieties, one is " boilings'* that flow over the floor plate of a puddling furnace when making the iron, and the other is '' tappings that runs out of a furnace at the end of the heat. As a general thing boilings are very much higher in phosphorus and silica than tappings. Mill cinder, as above outlined, is composed largely of protoxide of iron and silica. It contains, at times, ferric and magnetic oxides and is generally high in phosphorus. Table 9 is an analysis of four samples of mill cinder which the author secured to give an idea of the chemical composition of the same. As it would take about two tons of such cinder to make one ton of iron, there would be about twice the amount of phosphorus in the iron produced than is contained in the cinder ore where all cinder was used.
TAIJI.K  0.—ANALYSIS   OF   MILL   CINDER.
	i.	2.	3-	4-
Iron               ..........        ....	S2-4-S	52.2O	"52-91	53.70
Phosphorus             .	I .^2	* 7i/l	•47	•37
Silica     ....................................	24.65	2=5.06	23.43	2V ^9
Ma.njrdncsc    .  .     .     .       ......	•34	•45	•57	•35
				
Iron mill cinder is only used for making foundry or nill iron. It ivS not used for making Bessemer for the reason that it would raise the phosphorus too high, which for foundry iron is not so objectionable;, in fact, foundry iron often requires high phosphorus. It can be said that a few are now using steel cinder in making
rosed to contain the most iron, followed in ordersent in the ore.    Both these manganese metals are               jf|V