Bisbee daily review., 1910-12-04
Warren District Mines

fbeen originally built with a view of
 uture enlargement of the plant.
 The construction work now being
 started by the Copper Queen is for lthe installation of Q reverbatory fur mace and McDougal roaster plant lThe plans, as drawn for this moD- Istrous addition to what is already l one of the largest reduction works in the country call for four reverbatory furnaces and sixteen McDougal roast CTS, but only two reverbatory fur
 naces and six roasters are to be be
 gun at once. When this addition is
 ccmpleted, now a'med for January l, l1e12, the main smelter building will
 cover an area of ground about six
 hundred yards long. nine hundred l feet east and west, being 150 feet i0
 width, while the $50 feet addition
 now started will extend north from
 the west end of the original building.
 forming an l.: th,s addition will be
 100 feet in width,
 Starting at the line of the electric crane frame in the original building
 the reverbatory furnaces will come
 first, laying north 100 feet At the
 north end of the reverbatories will
 be a tunnel into which will come the
 slag pots, handled by motor eng mes op a track wh oh will rsach the stag
 dump to the west; then s1un-s bat
 tery of boilers which will have to- !, tai capacity of 800 horse power and
 the next space will accommodate the dust chamber, flues and connecting tracks Next comes the new stack. (which viii nave a height or 5Oo rect.
 The McDougal roasters will occupy the extreme north end of the ad- d;tion.
 ] Much Work Already Done. Already vast amount of work has
 been done in connection with the
 new add ton. Fifty men are now at
 wori. and a considerable force was
 required for several weeks clearing lon the site, re-arranging reailroad ltracks, etc. The excavation for the slag tunnel is now being made with l a steam shovel The depth of this ,dnnel is about IF feet and its wiotn -s Io rect. This tunnel will be rneo .rrn re-enforced concrete walls rou, .eet thick and will have a concrece cover within the building. The exca- vation for the base of the great stack IS gOmplete dllu lutSc iOk tue 4od-t- CTS will soon be finished
 The stack which is to go up in ccnnection with this addition will be zoo feet high, which is 40 feet more than the present steel stack accom- raodating the blast furnaces and cor 'yerters. The base of this stack Is to be l2 feet of reinforced concrete, with a diameter of 60 feet Master Mechanic Alex Adamson is personally directing the work and is now testing the soiidity of the ground wh oh Is to bear up this massive stack. Four holes have been dug into the bottom ! of the excavation, into which posts twelve inches square have been plac- ed on end. On each of these posts four tons of iron has been placed and after several days there has been no 1 tperceptible settling.
 i The amount of concrete which will | be required for all the foundations flor support ng buildings and machin- lery connected with this new feature Of the Queen reduction works runs into the thousands of tons This con-
 crete will be composed of Portland cement from Fl Paso, sand from Fair banks, regarder as superior to any [ Iother in this section of the South, west, anu SldR. ID dt | A high line ra 'lroad is being con structed which will come above the ireyerbatory furnaces. The embank ment grade for this line has been lcompleted. At the end of this em r bankment the concrete pillar is 1s 3 feet high. This point is about oppo
 site the site of the new stack and , from here a steel trestie will con tinue and curve to the east into the smelter building. Huge steel ort bins will be included in the new build - ing, into which will go the concen l ltrates from Nacozari, and from these
 lbins the concentrates will be dumped
 Into the McDougal roasters.
 The steel work has been practicali, completed for the addition of nor. 2 than 5000 square feet to the presen e lfiue dust chambers, accommodaun: 5 1.-the converters, and the brick worl viw'li start here next week. An ad i. ditionaI dust flue is being constructe,
 (which will carry the smoke from th'
 lecnverters into the new addition ti { the fiue dust chamber. This addition e al capacity for recovering the valu q able dust from the converter smok :, is the result of a scientific test whic'
 has been gong on for more than 
 year to ascertain the exact amour T of values which were being carrie
 with the smoke through the mail l stack This test is being continues 2 and results from it show just wha 2 capacity is required in the way O !. dust fiues and chambers to preyen ie serious loss of values
 r This construct on work, which ft to be done during the next twelv e months means much for the pro: 70 perity of Douglas. The fifty me now employed are only engaged i
 the excavation work, but much of tn y structural steel is now on the groun
 and it's erection will require higl
 pr ced mechanics and bricklayers g;
 lore win be required on the ne
 istack. The stack will be contracte
 but the remainder of the work vi L. ba drnn under a dfro-c@fox7 fxf fb