Bisbee daily review., 1911-08-27


 The hoisting plant is of very large capacity. of the Wellman-Seayer-M Nor gan make, with Allis-Chalmers motor
 of 300 horsepower, with rope-driven
 connections, ropes being from motor
 to a large flywheel, the rope being 5000 feet in length and operating in 5z grooves in the nywheel The hoist IS double-drawn. but here is an inno-
 vation. One of the drums is keyed fast to the shaft. one drum only being operated by clutch. The skip travels 325 feet per minute, and because of the slow speed, the uniform lift, and that nothing but ore is hoisted, the
 great loads are possible The skip holds 12 f-2 tons of ore, weighs seven tons, and the cable weighs about three tons, thus making a load of about % tons. The drums are 12 feet in diame- ter. The reversing gear makes about 42 revolutions per minute. All lev CTS, brakes, etc, are operated by air. The special beauty of the large fiy- wheel lies in the fact that when the
 load is to be raised the clutch is thrown in and the momentum of the
 big wheel starts the load, gearing increasing the power; and in start ing from rest they never use the power, but put the skip under the fly wheel and the weight of the skit brings the motor up to speed. A sepa. rate air compressor works automoat. lcaily in such manner that when the ar IS up to 100 pounds it shuts the current off the motor. and when il goes down to so pounds this air pres sure cuts into the motor and starts II. There is an electric telltale con. nected in front of the momentum wheel, by means of which, should a rope break or one of the grooves in which 1t runs, two red lights in front or the engineer would be instantly lighted. A hoist limit wire is two feet above the dump mark of the SKID; and thus, should the skin moi De stopped at the proper uoint. if would go up and strike this wire. con. meeting 1t, and this automatically throws the current of the engine. re- leases the air from the compressor releases the clutch, and sets all the brakes, thus averting an accident The electric buZzer system of signals Is used. In the same building is a smaller hoist for handling waste sun. ples' etc, the skip handling 4I-9 tons.
 The concentrator at Hayden of the Ray Consolidated is now operating three units of what is to be a 10000 ton plant of eight units, and these other units are beirg installed as fast as large force can accomplish if The building is steel frame, 37Sx4OO feet over all, and it is arranged for efficiency and convenience. I shall de- scribe the flow of the material through but one of the units, which is a du- plicate of all The bre from Rav comes down in 60-ton IngoIdsby steel cars and is dumped directly into steel bins of 25.00Q tons total capacity. From bin to eonveyor belt, bringing T to 35-inch. 15-bucket elevator. which takes 1t to six impact screens of seven and eight mesh. Reject goes 10 two 16x42 Garfield rolls. dry-grind. ing 1t till 1t passes through the screens. Undersize to six Garfield roughing ta. bles. Heads from the tables back to an elevator and discharged to a four compartment Janney classffer, the primary, where it is classified and re- turned to Garfield Chilean mills, grind ing through two No. v screens. Over How from the primary classifier goes to 10 cone tanks, this feed going to lsbell vanners. Second Compartment Of classifiers discharges to second olassifiers, four compartment, and this feed goes to Isbell vanners with cor, rugated belts. Feed from Chilean mills to three-compartment improved Janney classifiers. which feeds 10 four Garfield roughing tables and to Wiltey tables-on the Wilheys the first concentrates and tails are made. Overflow from secondary classiflers to 10 cone tanks, and this feed to IsbeH vanners with smooth belts. Overflow from mill classifers to 10 cone tanks. syphoned off and the pulp taken for the different vanners. Tails to tail race, automatically sampled every 90 minutes. Concentrates to receiving tanks under the milb elevated by centrifugal pumps, passing through au- romatic samplers, to concentrate bins. A filter is in each bin and a vacuum pump takes the water out and puts 1t again into circulation. Concen trates loaded into cars by Morgan TO- ton Gentry crane The ratio of con- centration is 20 to l. The overflow from all the cone tanks is purified and pumped back to circulation, being used on classifiers and roughing ta- bles for wash and feed water.
 The line shaft actuating the crush CTS and Chilean mills is beneath these machines and extends the entire width of the building. Rolls are on one side of the shaft on the floor above. and mills on the other side. Clutches, operated by air, start or stop any portion of this section of the mill. There Is a 30-inch bolt and a double row of 15xS-inch buckets. The sampling plant is to ,one side of the mill and is complete Here all sam ples are taken and the pulp sent to the laboratory. a short distance away.
 The milling plant is very complete, well lighted, and is doing excellent work.
 The pumping station Is situated just below the confluence of the San Pedro and the Gila rivers, about one mile from the mill. Wells have been sunk. supplying clear water. which would not be the case were the water taken from the rivers or from ditch