Bisbee daily review., 1908-07-21

Hanson also says that Frank Butcher struck a streak of gold ore in on account of the fact that it is self fluxing, makes a high grade matte, and contains a high percentage CT lime.
 During 1907 a geological survey or the mines was made under the diTec- ton of s. F. Emmons, of the United States geological survey. assisted by U. NJ Boutwell, and several other en- gineers. The maps and field work are completed and the report is short ly expected. We have already had much important advice and informa- tion regarding promising ground for prospecting, and excellent results are expected from this survey.
 koe su5GSly
 Reduction Works.
 Chas. F. Shelby took charge of the scnelter in July, 1906. He found the reduction works had grown by piece meal, as is usually the case with first works on new mines As a cOnse- Quence they were congested as to To- cation and facilities for handling ma terial, and they lacked proportion
 
 excessive labor costs, power costs aud fuel costs, and there were large losses in fue dust and great leakage of fur IIace gases, making the atmosphere in the works almost unbearable. He al- so found the eight furnaces, of whicl. there were seven different types, completely worn out, as also were Ji,u five stands of cOnverters. A carefuI grp HN~ ne since that time and extensive im- provements have been completed Ui are under way. The problem has been exceedingly difficult because the construction had to be car ried on in a cOngested area, in yeIy bad air and during continuous oper- adOns of the plant, and it was made more difficult by the need of attack ing the various impT svements as ne ! cessity required rather than in logical sequence. The work has all been un- dertaken on the basis that the saving in labor, power, fuel and repairs, will i pay for it in a year.
 The eight old furnaces have been pulled out and scraped. one at a time. Eight new furnaces have been purchased and seven are completely | installed; the eighth is on the ground and will be completed in a few weeks. l These furnaces are over f feet by 17 l feet inches at the tuyeres. the larg-
 est size that could be put into the
 building. They have 20 per cent more hearth area than the old furnaces and are capable of smelting 90 per cent
 more charge.
 Two new stands of converters with eight shells have been installed. They
 are of the barrel type, of most modern design, and were built on plans care fully revised by MT. Shelby. They
 have solid steel heads and riding rings cast in one piece. They are feet by II feet inches with extra high noses
 to prevent splashing over They are electrically operated and can be turned through the complete circle The three additional stands, with
 twelve more shells, will shortly be ill stalled. The converter building has
 been reinforced, braCed, and strength
 ened throughout, the CTae runaway
 repaired, and the cranes thorough! overhauled and rebuilt Tampinl
 machines of an improved design hay been put in for lining the couveTte shells.
 The seven small settlers have bee | scrapped and replaced by four yer, p large clay settlers of approved desigI - each serving two of the new furnace! [ The slag track system has been turne
 out and rebuilt, and the old slag c:tI I r5Dlaced by cars Of better design all l double the capacity This change na I demonstrated that with half the cTe' e employed when we were smelting SO | 900 tons of gross charge, We can eas r ly do the work when smelting tTic e as much.
 a The blowing capacity of the furnace r has beeTa increased by the installatic n of a blower of a capacity of 5000 z- Icubic feet per minute, driven by s direct connected tanden-compoun ,t engine. The two 42-inch blast pipt $ that led from the power house to u le blast furnaces were crooked, in tr e way of other improvements ar l. showed a loss of 160 h. D. in fri C. tion, These two blast pipes hay h been torn out and replaced by h. straighter pipe feet in diamete 'e with connections, new and comple re from the top of the blower to the fl Id mace hustle pipes.
 Possibly the most important wor e. though by no means the most eXpe of sive. is the erection of 75-ton ste re bins in front of each of the furnace e. in order thtat we may utilize, | a mixing bed system. This-work Is W t, under way. The ore from the mlxlI le beds will be delivered into these bl ,h by the existing belt system, and { IT. charges will be measured out and I 40 Into tbe furnaces automatically. nd The reyerberatory furnace, 19xl h. feet was in operation during tae re riod in question, but so far the CT suits nave not been satisfactory. T " tonnage treated was small and [
 fnel consumption high. Still the il le dust smalted has been done at hgt ne lever than the cost either of treatl he such material in the blast furnace el, saippsng it. Aside from defects Tn lis cation, fiues and cross sectiohs a cost is due to coal that is not adap, of to fine work. The two coals obtaina nd ara callup Ignite and Colorado-N