Blogs
Effect of Sulfur and Oxides in Ordnance Steel
Table of ContentsDESIGN OF GUN FORGINGSRESULTS OBTAINED WITH ELECTRIC STEELEFFECT OF PHOSPHORUSEFFECT OF SULFUREFFECT OF OXYGENPHOTOMICROGRAPHS OF OPEN-HEARTH AND ELECTRIC STEELMANUFACTURE OF STEEL AT NAVAL ORDNANCE PLANTDESCRIPTION OF REACTIONSCONCLUSIONSDISCUSSION In the manufacture of gun forgings and other steel parts that, in service, are subject to sudden high stresses and shocks, it is most desirable to use steel possessing the greatest
Silver Fineness Determination
Table of ContentsDETAILS OF THE METHOD Volhard’s Method(a) Stock Solutions.—(b) Working Solutions.—Precautions.—Calculation.— This excellent volumetric method commends itself as a means of estimating the fineness of silver—firstly, owing to the large number of possible impurities which do not affect its accuracy (these impurities include Cu—up to 70%— Au, Pb, Zn, Bi, Cd, Fe, Mn, Sb, and As) ; secondly, the method
Descriptive Mineralogy Classification
Table of ContentsSCHEME OF CLASSIFICATIONI. NATIVE ELEMENTS Scope of Descriptive Mineralogy. — It is the province of Descriptive Mineralogy to describe each mineral species, as regards: (1) form and structure; (2) physical characters; (3) chemical composition including blowpipe and chemical tests; (4) occurrence in nature with reference to geographical distribution and association with other species; also in connection with the
De-Silverizing Bullion
Table of ContentsRemoval of Copper from BullionBULLIONRemoval of Antimony and ArsenicZINCING KETTLESCYCLE OF OPERATION IN DE-SILVERIZING The de-silverizing of base bullion is carried out in accordance with the principles of the well-known Parkes process. The base bullion produced by the blast furnace department carries (apart from silver values) impurities, the chief of which are copper, antimony, and arsenic. In order
Crystal Structure of Solid Solutions using X-ray Spectrometer
Table of ContentsCOPPER-ZINC SERIESSOLID-SOLUTION TYPESSUMMARY “It would seem as if the methods used to date for the elucidation of this complex problem have yielded all they are capable of yielding and that further straining of these methods will only serve to confuse the issue, the point having been reached when this juggling, no matter how skilfully done, with allotropy, solid
Core-Oven
Table of ContentsELECTRICAL CORE OVENSRadiation and Other Unavoidable LossesHeat Losses Under Operating ConditionsHeat AbsorptionBakesOIL-FIRED CORE OVENRadiation and Other Unavoidable LossesHeat Losses Under Operating ConditionsHeat AbsorptionBakesUNIFORMITY OF BAKES IN THE THREE CORE OVENSCOMPARISON OF CORE OVENSCONCLUSIONSDISADVANTAGES OF ELECTRIC CORE OVENSHeating RackHeating Plates, Driers, etc.Heating Air in OvensRadiation and Other Unavoidable LossesBaking Cores The Core-Oven tests here described were made to obtain information regarding
OSA Sample Pumps – Vertical Tank Pump
For pumping and feeding a slurry sample to a On-Stream-Analyzer (OSA), the classic pump to use is a vertical tank pump. The market for such OSA sample pump appears dominated by Metso. Irony is OSA’s are made by Outotec or Thermo Fisher Scientific, but you must go elsewhere to pump your slurry sample to the X-ray. What size should the OSA
Molybdenum Steel Alloys
Table of ContentsWhy molybdenum is added to steelInteresting facts about molybdenumEffect of molybdenum in stainless steelMolybdenum steel composition It is twenty years since the writer made his first molybdenum steels and others were making them commercially five years earlier but the prevailing opinion seems to be that molybdenum steels are new; from time to time the daily press speaks of
Deslimer
The deslimer is provided with a central feed box, having a baffled bottom to break the velocity of the inflowing pulp. The bottom, or discharge chamber, has a clear-water inlet, which directs, the flow upward along the axis of the deslimer. The spigot is inserted in a movable holder, attached to the bottom of the discharge chamber, permitting an instant
Touchstone Gold Tester
There are three methods for ascertaining the quality of gold, viz., by the touchstone and needles, by cupellation, and by parting or quartation. The first is the process which, from its simplicity and convenience, is used by jewellers and others for learning at a glance the value of the articles which they buy and sell, and which are composed of
Melting Gold
For melting gold, a strong fire is necessary, and the operation is generally performed in a forge or furnace. The following is a description of a new form of furnace, invented by the author, and which is admirably calculated for melting in crucibles, for the distillation of mercury, for cupellation, and for every other chemical operation requiring the use of
Effervescing Steel
https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US3210813.pdf
California Gold
Having lately analyzed three specimens of ore from California, all of which were supposed by the possessors to contain gold, and finding but one of them that proved to contain it, I am convinced that the native gold is found in the same localities as some worthless ores, having a yellow colour, and which are often collected or bought under
Mineral Determination Tables
This contains a series of tables, more or less complete, of minerals arranged according to chemical composition or to certain prominent crystallographic or physical characters. These, it is believed, will be of service not only to the student, but also to the skilled mineralogist. The type used in the printing of the mineral names indicates their relative importance. Table I
Native Elements
The native elements are divided into the two distinct sections of the Metals and the Non-metals, and these are connected by the transition class of the Semi-metals. The distinction between them as regards physical characters and chemical relations has already been given. The only non-metals present among minerals are carbon, sulphur, and selenium; the last, in one of its allotropic