Bisbee daily review., 1915-03-14
ANACONDAWORKS IMPROVEMENT IN REDUCTION
Improvements at Big Monta. ma Reduction Works Will Cost in the Neighborhood of S4,000,0O0.

VI " HWY NgC0Cf
 When John D Ryan and B B. Thayer were at Butte last Decem- Der the important announcement was made that about S6.OOOO00 would be expended by the company in improve ments at the reduction works at Anaconda and Great Falls These improvements are expected to result in considerable savings in metal and operation costs. and will permit the company to work ower grade ot ore than has hitherto been possible, and will thus result in a considerable prolongation of the life of the mines
 At the present time the recovery made on the ore sent 10 Anaconda and Great Falls is only about 7S per cent of the copper content It is expected to raise this recovery 10 about 91 per cent by the use of the
 Notation process on the material which now leaves the coucenrator This will require radica changes in the lower part of the mill The up- per portion win remain much the same as it is now, except that Symons disc crushcr will be added in each section in order to obtain in- creased crusher capacity By SO do- ing the capacity Of the concentra- tor vii be increased from about l2.- 800 tons per day toN150o0 tons per day The iigs on the roll and Hunt ington mill floors win be replaced by roughing tables Of a special design which will make concentrate and coarse taiing The tailme win be re- ground in pebbe mills SO that it win pass a screen with about 60 holes to the liueal inch Thisy finely ground sand win then go to the ho- tation machines. which will be make a concentrate containing about per rent of copper and a tailine of only about O1 per cent copper The slime which is now treated on round tables will bmrther treated in Notation machines, making talmg which can go Co waste and concentrate which will go to the filter plant
 Under the new system there will eb no hrstclass ore and all of the ore from the mines will 20 to tie concentator instead Of being partly sent to the blast-turuacas. No coarse concentrate will be produce. and the field ol the blastiuruacos Hill be greately restricted, if the latter are not entirely eliminated In order to take care of all of the concentrate which has been going Co the blast furnaces. as well as the concentrate which results from the treatment of trst-class ore and from the increased recovery. a new ruaster plant will be constructed containing 40 furnaces of % ft Gin. diameter These fur naces will be charged by a couyeyor system instead of by cars as are the furnaces in the old roasting plant The calcine from this plant as well as from the old roasting plant. will be hauled by the present rrammins system 10 the present reverberatory plant The furnaces in this plant are an being enlarged and equipped with pulverized coal burners The new furnaces will be 25 ft wide almost 15O tt Ionf and will smclt about 650 tons per day each. The present re- verberatory buildings vii therefore house furnaces having an aggregate capacity almost two and a bali times as great as before, and will melt an of the concentrate coming from both roasting plants.
 The barrelshaped conyerters in the converter plant are being re- placed by large upright converters Of the Great Falls type about 20 ft diameter. There will be seven of these converters, and they win be abe 10 produce about 22,000.00U 10. of copper per month. The slag from these couverters. which is now be- ing solidihed and remelted in the blast furnaces. will be tapped into large ladies and poured from lhese directly into a huge reverberatory which will be constructed in the relin- ing department Of the converter plant This furnace will be by far the largest reverberatory in the world and will be 25 ft wide by 175 it. long It will receive about 700 tons Of molt- en converter slag and $50 tons of fine ore per day. Tho furnace win clean the converter slag 10 such an eN- tent that lt may run to waste.
 The new plant will be partly sup piled with air from a turbo blower having capacity of about 35.O0O en.
 ICortinuoa or mace tvo1