Arizona republican., 1901-06-22

frames, which in turn ,arry a set of chain block and pulley hOisting appa- ratus. These carriages dump the con nts Of the furnace pots, which are hung in slots to allow them to tip into a large matte Pot, which they convey and empty into the conve4ters. The matte as 1t So5s into the Converter5 r. about Jj per cent pure m tai.
 The cOnverters arc all fed with air blast from a huge compressed air re- ceiver in the engina room, and after b ing started and warmed up by a coke fire depend wholly for their fuel on the sulphur contained in the matte. The COnv rters furnish much greater heat than the furnaces and the m tallic product is 9S per cent pure. and better.
 There are five convertcrs constantly in use and about .,sven more und re- pairl and being lined with a thick coat ing of fire clay. The chImncys from these "onverters all connect with q second large incline oaEt iron stack which also leaes up tn hill and dis charg there.
 Flue dust is product of both the furnaces and oonverters and is an oxide and other forms of copper which are ma le in finely divided particlel and blown up the flu ty the heavy blasts hefore they have time to melt. This ilue dust rurs heavy in copper, about 60 per cent. and is raked out of the tottom of the stalks to be treated Larg quantities rise to the top of the incline stack. with the eulphur fumes and smoke and are depo fted on the hillside near the exit. In a years time this deposit becomes nearly a foot thick and GOV rS. large area. When the smelter and mine close down for repairs in the two holiday weeks at Christmas time this dug. is gathered off the hill-ide and again treated. It ac- cunulatcs !apdiy enough atthe foot Of the stacks to require it's constant treat ment in this fashion: l. is collected in bins, mixed to q dampness with water and run through roller mill where it i5 compressed and cut into aGy5es. From tn min these 'dooe- run up series of endless belts which carry them to the cOnverters. They are again fed into the convcrterg. and arg now heavy nuugh to melt rather than float Tn the blast. From the conVerters the copper comes out 9S per cent or little better and is cast into piga weighing from four to five hundred pounds, weighed. load d on the cars and shipped to the refinery. These pigs run heavy in gold and silver. which is ex- tacted al the refinery.
 The operation of the sm lter requires about l50 men, receiving from g. to 8 per day. with an average wage of $3.50 per man.
 Many thousands of dollars go to vast every year In the sulphur fumes. which are not utiilz d. Were il not for the crowded condition of affairs these fume ould be converted into sulphuric acid at a great profit to the company, but a plant for this purpose is quite an extensive one and ther- Is not the room to conveniently handle the work now in hand.
 Ore of the old matte furnaces, used before the installation of the pr. sent Mitchell furnace s, Is being repaired and set up for trial run. If this proves satisfactory the furnace will be moved to one of the Company's outlying prop crties and set up. These old matte fur races will work orly ore assaying a little under 12 per cent and are not very thorough even With that grade, The new type of furnace will operate sue aessfully with under per cent ore and prove very satisfactory.
 LESLIE GILLETT.