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Ore, definition of an Oreand fuel, ratio between in reverbeiatory smelling , idbyGoogle Parrot reverberatory matte, analysis of 414, 410 Partial pyrile smelling 114, 344 analysis of D. & D. slag 319 Rapid City slag 330 slag from Gilpin Co. ores 336 Tyrolean slag 330 Val Verde slag 331 behavior of furnace in 333 briqueltiiig of raw fines for 33a comlderation of 323 defined 313 dependent upon iron 331 excess of silica in ! 317 illustration of , 3j6 use of cote in 333 hot blast in 334 value of lime ta 3»7 value of p/rile in 317 Pearce, R., analysis of Argo gold bottoms 444 improvements in teverberatories by 173 increase in capacity by use of hot ore Joi 00 effect of bismuth in increasing collecting power of matte 415 on insoluUlity of gold in pure ferrous sulphide 434 Pearce turret roaster 107 Percy's pyrilic smelting 144 Petroleum, refining of as a side industry 518 used at Arizona Co.'s smelter, cost of ais Piston blowers 166 Pittsburg & Montana Company's smelting at Butte 464 PJattner's work on Roasting PrintsstS 40 Poling of copper, the 4S9 Practical study of slags, a 339 Practice, former, in rcverberatory smelting iSo Practice of roasting 80 Precious metals, recovery of from matte 440 Principles of furnace building, the 495 Principles of roasting 33 Production of metallic copper from matte 429 Proportions of reverberatory : 170 Proportions of silica and bases in slags 34a Protective influence of sulphur for copper 177, 369 Provisional calculation of ore charge 13a Pulverization, degree of essential for roasting 9a Pulverized coal, use of at Utah Consolidated Co 193 use of in reverberatories 193 Pyrite, behavior of during reverberatory smelting 175 idbyGoogle Pyrile, behavior of during roaslinR j8 during smelting 15 in [qriite smelting 221, 16S effect of heat upon 403 elimination of sulphur from in succesuve stages 321 for flux, means of obtaining 332 reactions during roasting of. 18 ihree-fotd office of in pyriie smelling aai idbyGoogle c smelting CO oxidized by SOa in 174 topper prolecled by sulphur in 169 costs of at Mt. Lyell _. 323 debarment of gradual reactions 306 deficiency of silica in , ,. 286 definition of 1 14 determinalton of amount of silica required in 250 development of carbon dioxide in ... ... 274 development 0/ heat in 177 distinction of from partial pyriie smelling 324 distinct nucleus o( oxidation in. 307 distribution of hei.t-consumptian in 280 effect of blende on 316 excess of silica 283 ■ free SiO, on concentration 28g efficiency of U-pipe stoves in 338 elemental sulphur in gases from vi6 evils of combined silica in ... 249 evils of excess silica in. 239 forbids great replacement of FeO by CaO 313 formation of ferric oxide in 165 formation of magnetic oxide in 265 form of silica suitable for 248 fusion point of sulphides (33 galenai" 3'7 genuine, aim of metallurgist in 324 hampered by alumina and lime 313 heating blast by sulphur 322 heavy spar in 3:6 hot w. cold blast in 319 intensity of combustion essential 10 311 leadin 3'7 limit of use of alumina silicates in 313 loss of heat in waste gases 279 manufacture of sulphuric acid in 313 necessity for earthy bases in , 245 necessity for free silica 247 needs high blast for large capacity 293 nitrogen in gases from 224 no permanent formation of higher iron oxides in 309 of Percy 244 office of silica in 21S office of sulphides in 215 office of the ballasl-slag in 310 oxygen in gaaes from 225 partial 214, 244 idbyGoogle idbyGoogle Reactions during reverberalory smelting. 173 duKng roasting of pyrite 2S in pyrite furnace are not gradual 306 in pyrile furnace seriously affected b); irregularities 275 in roasting 34 Reconcentration of maite by raw smelting 337 Recovery of flue-dust 164 of fume 164 Red brick in furnace building 5*4 Reducing action of carbon 76 of carbon monoride 76 Reducing agents 12 Reduction, definition of 11 of iron in furnace 144 stage of in refining copper 489 Refining of copper 46S analyses of products from the 487 al Lalie Superior 469 button samples in the 489 by direct process 178 by electrolysis 449 effect of cuprous oxide in the 4Qi effect of impurities in the 46i> effect of overpoling in the 491 formation of cuprous oxide in the 4SS materials subjected to the 468 object of the 468 poling in Ibe 4S9 stages in the 485 stage of oxidation 486 stage of reduction 489 Refining of petroleum as a side industry S*8 Removal of slag in reverberalory smelting 107 Renewal of water-jackets without stopping process 157 Repairing reverberalory furnaces 308 Replacement-value of bases, illustration of 345 of bases, table of 356 of CaOandFeO 351 of lead oride 354 of magnesia 3SS Residues from the electrolytic refining of copper 480 Result of smetdng 48 Reverberalory furnace, definition of 98 distinguishing features of 167 Reverberalory roasting furnaces, elements of , 97 Reverberalory smelting 167 adherence of half-fused ore to hearth 30j idbyGoogle Reverberatory ameltiiig, advantage of using hot ore ia loi at Argo, analysb o( charge 188 analysis o£ coal 1S9 behavior of pyrite during 175 behavior of silica during 176 conservation ot heat in ig6 dangers of large body of matte on hearth 103 delay caused by use of cold ore 200 from dropping charge lot distribution of heat in. .' 199 idbyGoogle Revcrberatoiy smelting furnaces, fire-box, area'bf ... 17: firing and graling of 194 forced draft in. iga fundamental duly of ... 170, 179 ' giale, area of 171 grating with use of water tg6 hearth, composition of. 199 hearth , length of 1 7 r hearth, width of 171 high temperature in attained by modem increased in capacity bv modern improve- ments 184 ironing of 506 lealcage of air into 197 limit of length of 193 limit of width of 193 lowering of temperature of by firing 194 rainimum grate area permiasibtc in 187 natural draft in 192 oil-burning furnaces at Humlxddt. Arizona ato originated in Swansea 172 perfection of combustion 195 proportions of 170 radiation of heat from 197 ratio between ore and fuel 189 reactions, peculiarity of 173 removal of clinkers. ; 193 repairing 308 required grate-area of 18S smelting raw fines in .' 9a taUe of Arizona Smelting Company's. 110 of fuel burned in i8q of results from 189 temperature insufficient in older iBo Qse of pulverized coal in 1.13 weak points of 180 Richards, J. W., chapter on thermochemistry. 530 Rickard, T. A „ editor of "Pyrite Smelting" -. 213 Rio Tinto method 2 Roasted ore, analysis of (illustrative) 52 analysis of in illustrative calculation i IQ completed table of (illustrative) 53 condition of the sulphur in. 45 slag-forming constituents of 54. 5S table for. 7» table for results of smelting of 71 idbyGoogle Routed ore, table of (illuslration) 5», 65 Ubie of siUca and iron in (iUustntive) 54 Roosting and bessemcrizing, contnst between aio Roasting, behBvior of pyrile during 18 behavior of sulphides during 15, z8 change of weight in 15 composition of product (rom 44 conditions favorable for >3i 80 decrepitation of ore dunng 93 degree of pulveriiatiot) tequiied 9a during reverberalory smelting 174 for blister copper 437 for 50 per cent, mute, iliustiation of 70 heat-distribution duriitg 544 heat-evolution during 544 in heaps 81 installs 81 object of ai of antimoniat ores, reactions during 40 of antimony sulphide, heat-developnient in 543 of arsenopyrite, reactions during 40 of blende, reactions during 38 of chalcocite, reactions during 36 of chaJcopjrite, reactions during 36 of coarse concentrates 94 of cupric sulphide, heat-development in 540 of cuprous sulphide, beal-development in 538 of fine ore, apparatus suitable for 96 of galena, reactions during 39 of heavy spar, reactions during 43 of iron sulphide, heat-development in 341 of lead sulphide, heat-development in 541 of limestone, leactions during 41 of magnesium carbonate, reactions during 43 of matte, reactions during 37 r of pyrite, reactions during 18 of pyrrhotitc, heat evolved during. »ig of pvrrhotite, reactions during 35 of quartz ores, reactions during , 41 of silver sulphide, heat-development in 543 of zinc sulphide, heat-development in 541 principles of ai purposely left incomplete 41 "solid oigyen" in a 18 the practice of 80 thermochemistry of , 538 to kernels, of copper sulphides 119 Roasting, varieties of fuel for gS Roasting furnace, development of 9q encounigement of oxidation in. 98 increase in length o£ 100 of Bruckner .' 101 of circular form 104 of Evana-Klepelko 106 of Heneshoff 106 of McDoi^l 105 of O'Harra , joa of O'Harra as improved by Allen 103 of Pearce 107 with hand labor 99 Roasting-gases, illustrative an&lysis of 544 Roasting-processes, ticatlse on by Platmer 40 Roastir^-reactions 24 Roasting-reverberatories, elements of 97 Robinson, Cyrus, Engineer Arizona Smelting Company iio Robschmcizen , 244 Rdntgen, Paul, investigations on composition of mattes by 410 ROras, development of heat in smelling at 278 Rotary blowers 166 Sainte Genevieve mines, loss of copper in heap-roasting , 81 Santa Rosalia black copper, analysis of 410 Santa Rosalia matte, analysis of , , 410 Self-fluxing ores , 11 Sesquisilicates, description of 369 formation -temperature of 160 of FcO and CaO, fonnation-temperature of 3S4 Scsquisilicaie slags 344 Sliort ton, the 556 Silica, amount of base fiuxed by i lb. of 360 amount of FeO taken up by in pyritc smelting 157 amount of fluxed by t lb. of base 360 and bases in slags 340 proportions of in slags 341 behavior of during reverberatory smelting 176 behavior of during pyrile smelling **i behavior of during smelting 47 combined, evils of in pyrile smelting 24Q deficiency of in pyrite smelting 186 determination of amount required in pyrile smelting 150 effect of excess of in pyrite smelling 2S3 idbyGoogle Silica, evils of excess of in p/rite smelting ijg excess of in piartial pyrite smelting 327 fluiea available for ■.,... 31J free, effect of on concentration in pyrite furnace 189 free, essential in pyrite smelting 147 in form suitable for pyrite smelting 248 in ores, smeltere' penalty for 56* in pyrite furnace, amount of dependent upon blast 253 in smelting, illustration of disadvantage of 56a D,B,ii.db,Googlc Slag, cjiploaioiu of in water granulation i6j foul, from smelting 51* from Deadwood Sc Delaware smelter, analysis of 365 Gilpin Co. II idbyGoogle Smelter gases, ireaied by dilution with air jig Smelters' price for bases in ores 56* gold and silver in ores 559 Smelters'-teriff applied to ores, calculation of 563 itluslration, analysis of ores in 563 practical illustration of 563 Smelters' ton, the 556 Smelting a roasted ore, calculation of 49 behavior of earthy bases during 47 of ferrous oxide during 47 of iron during 74 of silica during 47 of sulphur during 47 blast furnace 108 chemistry of 44 compared with water-concentration 7 copper, con^deration of "General Expense" in 566 disadvantages of fluxes in ii» disposition of fiue-dust from 515 of foul slag from 512 of fumes from 517 of slag from 311 distribution of constituents in 72 elimination of impurities during 475 evil effect of irregulaiitieB in 185 evils of barren flux in 370 first principles of 5 in blast furnace, conditions during 46 influence of forehearth on 150 water-jacket on 149 in reverberatory furnaces 167 losses in 73 object of . , , 5 of oxidized ores, loss of copper in slag during 143 sources of difficulty in 143 of sulphides, revised table of 117 of unroasted matte 95 removal of sulphur in ordinary 1 14 result of 48 roasted ore, slag resulting from (illustration) 56 table for results of 7* slag bases in 373 sulphide charge, calculation of 11 1 Smetting-charge, canceling constituents of 178 Smelling-cosls, calculation of per pound copper 564 Smelling-illustralion, composition of matte frc^n 13S idbyGoogle Smelling-losses calculation of Smelling-ptactice at Buite, proposed modification of.. Solid oxygen in roasting Solubility of iron in ferrous sulphide metallic copper in matte Specific gravity of mattes Speci&c heat of gases, calculation of [able pf Sphalerite (see Hnc blende) Google Sulphur, condition of in the roasted ore 45 delta, table of , , 129 distribution of in matte 70, 423 effect of on metallic copper 47a elemental, in pyrite furnace gases 126 eliminated from pyrite in successive stages 222 factor for in matte 70 heating blast from combustion of 323 protective influence of on copper 177, 269 removal of in ordinary smelting 114 uniformity of in mattes 431 Sulphur-content of iron sulphide, conservation of •. 278 Sulphur dioxide gas, absorption of by lime. , '. , 526 by water 526 action of coke upon 129 as an oxidizer of CO in pyrite furnace 274 dilution of Vfith air 528 effect of upon animal life 525 upon vegetation S*S injurious effect of in smelter gases 523 manufacture of sulphuric add from 527 means for controlling 525 Sulphuric acid, manufacture of from sulphur fumes 527 manutaciure of in pyrite smelling 323 process for extraction of diver from matte 446 used to liiiviate copper ores 538 utilization of 528 Superphosphates, manufacture of 518 Superstructure and accessories of modem blast furnace 155 Swansea blister process 437 fire-assay of copper 559 method of matte concentration 436 oripn of reverberalory in 172 Table tor fluxing coke-ash 137 for slag of complete illustrative charge ,. 137 Gibb's, on comparative elimination of impurities 477 Table of analyses of products from refining copper 487 of analyses of pyrite furnace gases 230 of analyses of various coppers 483 of Arizona Smelting Co.'s ore-charges 2'* reverberalories 210 of assays of matte from illustrative smelting 113 of atomic weights 568 of behavior of pyrite in pyrite smelting ^^i idbyGoogle Table of combined sulphur in malte 413 of comparative thermal results in pyrite smelting 18a of composition of 50 per cent, matte 69 t per pound copper , , , 565 of degree of elimination of impurities during converting 477 of delta sulphur 229 of distribution of constituents on smelting 71 of distribution of Mt. Lyell heat-consumption 180 of earthy bases suitable for slags 246 of elimination of impurities in smelting 475 of extraction processes of gold and silver 441 of foHnation-temperature of bisilicales 159 of ferrous-lime Usilicates 385 of ferrous-lime sesquisiljcates 384 of ferrous-lime singulosilicates 383 of ferrous-lime 3 : 4 silicates 383 of ferrous-lime subsilicales 380 of ferrous silicates 374 of 4 : 3 silicates 161 of high-lime slags 167 of lime-iron slags with varying SiOj 387 of magnesia slags 391 of manganese slags 390 of sesquisilicates 160 of singulosilicates 36a of subsilicates a66 of formatioD-temperature on replacing FeO and CaO with alumina. 395 lime with alumina 395 silica with alumina 394 of fuel burned in different reverberalories i8g of harmful impurities in mattes 474 of heal evolved by oxidation of various substances 53a in formation of carbonates 533 in fortnation of sulphates 533 in formation of sulphides 533 per unit weight of sulphide oxidized 534 of heat of formation from the elements 535 of slag-forming reactions 536 of illustrative roasted ore 51, 65 of illustrative roasted ore completed. 53 idbyGoogle Tabic of measures, values, and weights j68 of per ceot. of Cu required to make matte a good collector 415 of O in slag bases 347 of possible impurities in copper mattes 474 in copper ores 474 of rearranged analyses of impure mattes 408 of replacement- value of bases 356 of resulls at different reverberatoiies 189 of results of smelting roasted ore 72 of roasted ow 72 of silica and iron in illusirative roasted ore 54 of silicate-defitee of slags 344 of simplified analyses in illustration 115 of specific gravity of mattes 413 of specific heat ot gases 545 of stages of elimination of S from pyrite. Tyrolean slag, analysis of Unisilicate slags Unisiticates, description of Unit of copper, definition of U-pipc stoves, efficiency of Utah Con. Co.'s Smelter, use of pulverized coal c Utilization of heat in reverberatory smelting , . .. Valences of elements. Values, weights, and n Val Verde pyrilic slag, analysis of Variability of matte in pyrite smelling Vegetable life, the effect of smelter gases upon Volatile metallic substances in smelter gases, effects of Washoe blast furnaces, illustrations of plans of Waste gases, loss of heat in at Mt, Lyeli , , Waste heat, utilization of in reverberatory smelting. .. Water, absorption of sulphur dioxide gas by Waler-granulation of slag, explosions accotnpanying , , Water-jacket furnace, influence of on smelling Water-jackets of modem blast furnace renewing without Stoppage of process. Water system of blast furnace Weak points of reverberatory furnace Weight, change of in roasting Weights atomic, table of Weights, values, and measures Welsh blister process Wet assay of copper, definition of .. Wei methods While metal of Gibb & Philiji production of , , , , Width of reverberatory hearth limit of Wood [n blast-furnace smelting Working-doors of reverberatory, evils of opening jgic Ziervogel process for extraction of silver from mattes 445 Zinc, efiect of on metallic copper 47a in ores, smelter's penalty for 56a Zinc blende in pyritc smelting 316 reactions during roasting of 5S Zinc oxide, effect of on slags 392 Zinc slags discussed by L. S. Austin 398 Zinc sulphide, heat-developtnent in roasting 54Z Zone of fusion in pyrite smelting 236 Zone, oxidizing of pyrite furnace, augmenting 391 Zones of pyrite furnace 191 idbyGoogle COPPER MINES of the WORLD By Waltek Harvet Weed, tf the United Slatis Geological Survei. 6 I-S X p 1-8, cloth; iltustraled; $4.00 postpaid. Concise and authoritalive accounts of the copper mines and depoaiia of ihe world, by an expert in ore deposition. ORE DEPOSITS of the UNITED STATES and CANADA By James P. Kimp, Scbaal of Minei, Columbia Vniveriitj. 6 1-3 X p 1-8; cloth; illustrated; $5.00 postpaid. A general treatise on the principal geological features of the United States and Canada, including the tbrmacion and deposition of metalliferous ores. A fiill bibliography is given with each des- cription, together with the stactadcs of each metal. LEAD and COPPER SMELTING and COPPER CONVERTING By Hiram W. Hixon. 6 1-8 X p 1-8: cloth; illustrated; ^J.OO postpaid. A» the title implies, this is an exhaustive treatise on copper smelting and converting. It includes copper matte smelting, the extraction of gold and silver from matte, furnaces, spouts, settlers and jackets, and in fact gives iiill data on all branches of the work. ORE DRESSING By RoBT. H. RicHARits. Two VBlumei. 6 1-8 x g 1-8; (loth, 1250 ftges; per set, $10. 00 postpaid. The most Mhauitive contribution to metallurgical literature yet published. The general theory and practice of ore dressing is cov- ered from one end to the other. An invaluable book to mining, metallurgical and mechanical engineers. PYRITE SMELTING By T. A. RicKARD, formerly editor of The Engineering and Mining Journal. 6 1-8 x p 1-8; cloth; ^2.00 postpaid. These contributions to The Engineering and Mining Journal by some of the best known authorities on copper, including Edward H. Lang, H. W. Hixon, and many others, form one of the most useful discussions on the general subject of pyrite smelling now in existence. HILL PUBLISHING COMPANY S05 Pearl Street, New York zo Bucklersbury, London Tie Engineering £tf Mining Jaurnai —Power — American Machinist idbyGoogle MODERN COPPER SMELTING By Edward Dyer Peters, Professor of Metallurgy at Harvard University and Author of " Printiples of Coffer Smelting." 642 paget, 6^X9}; fully illustrtaed ; $5.00 postpaid. This important book is now in its fifteenth thousand. It is recognized eveiywhere as the standard work on methods of copper smelling. It is based on the praaiee of the leading metallurgists of the world and gives full and complete descrip- tions and analyses of methods and e<iuipment$. It is distinguished from Professor Peters' nevi book, " Principles of Copper Smelting," by confining itself pri- marily to the "means how," whereas the new book gives the "reasons why." THE COHTEHTS HT BRIEF Copper and its Ores. Distribution of tbe Ores of Copper. The Sampling and Assaying ot Copper. The Chemist^ of the Calcining Process. The Preparation of Ores for Routing. The Roasting of Ores in Lump Form. The Roasting of Ores in Pulverized Condition. Antomadc Reverberatory Calciners. The Smelting of Copper. The Chemis&y of the Blast Furnace. Blast-Fumace Smelting (with Carbonaceous Fuel). Blast Furnaces Constructed of Brick. General Remarks on Blast-Fumace Smelting. Pyritic Smelting. I^tic Smelting-- Its History {Principles; Scope; Apparatus; Practical Results. Reverberatory Furnaces. We can supply all Technical Boeks of AU Publishers. Send for our General Book Catalog. HILL PUBLISHING COMPANY 505 Pearl Street, New York 10 BuclElenbury, London 7he Engineering t3 liisningyournal— Power -American Machinist idbyGoogle idbyGoogle idbyGoogle idbyGoogle DAY AND TO SI.OO C OVER D UK. IN THK SEVENTH DAY UPR 9 ii37 y." f '"* mt 1 14 vm LD ai-10Dm.S.'S« D,B,ii.db,Googlc I D,B,ii.db,Googlc idbyGoogle. 