Arizona weekly journal-miner., 1902-03-19
FINE CONCEN=
 TRATING PLANT
The Standard Smelling and Refining Company's Con- centrating Works at
 Val Verde,
4 Very Complete and We'll Equipped Institution for the Treatment of Ores.

A trip to Val Verde without a visit
 to the concentrating plant of the
 Standard Smelling and Refining com
 pany would be incomplete. While
 the concentrating plant is not as large and extensive an institution as the smelter, it is scomplete and thor oughlY equipped for its particular work, as the great furnaces in which the precious metals are extracted.
 During a recent visit to Val Verde the editor of the Journal Miner was very courteously shown through this concentrating plant by Superintendent H. w. Paulsen, who explained the working of the ma chinery and the various stages through which the ore passes from the time it is received at the plant until the precious metals are concen- trated ready for the smelter.
 The machinery is run by power ful Corliss engine of the very latest make of S0-horse power. capacity, the boilers in which the steam is gener ated being of equal capacity and oil is used for fuel.
 Most of the ore is received at the ,.lo.% o,, +ho ,o,lrooI 4bo 4rox,l- bo,,,c- run along the side of the building, making it very convenient for unload ing into the building. After being unloaded it is shoveled into a power ful ore crusher 10x16 inches set to crush 2 inches to inches in size or to ? inches if needed that fine. From the crusher it passes to a 30-inch picking and conveying belt, or, where the ore is not wanted to pass through the crusher, it can go direct to this picking and conveying belt. From the picking belt it is discharged on a 14-inch conveyor belt over hins using a discharge device to put it into any bin desired. From the ore bins it passes out through the ore gate to the I0113 inch conveyor belt where it is taken to the grizzly. The part pass ing through the grizzly passes direct to an elevator. The ore passing over the grizzly passes into an automatic feeder where it is fed into a 7xl0-inch crusher, thence to a set of 27x14-inch rolls and thence to another elevator, mixing with the product that has passed through the grizzly.
 Passing up the elevator it goes to screen, the oversize from the same passing back to the rolls and the un- dersize passing to another screen. The oversize from the second screen passes to still another set of rolls 24xl4 inches and the undersize passes to a third screen, taking out the shines and then goes to the settling tank above the concentrations. The oversize from No. 3 screen goes di- rectly to concentrators. The ore passing to the No. 7 rolls goes on to the No. 1 elevator and through the same system of screens.
 The concentrates is the only arti cle shoveled or touched by man from the time the ore Is shoveled into the 10x16 inch crusher at the top of mill, its movement in all other cases being automatically. The concentrates are shoveled into wheel barrows and dumped into car on gravity tram, lowered by a brake.
 The ore for the sampling mill is put in car which runs over a weighing scale and then dumps into bins or crusher floor of the sampler. The ore being run through this concen- trating plant at present is all obtained from the Douglas, Lacey x Com pany's property, and while the plant was originally intended as a custom one, it looks as though the Douglas, Lacey & Cos properties will be able to keep in supplied with ore.
 For the receipt of custom ore from the mines in the immediate vicinity a wagon tramway has been constructed which carries the ore to another part of the building and over the railway track from which the ore is discharged from the cars. The ore from this tramway is discharged into separate bins, which have a capacity of about 100 tons.
 The plant is equipped with four Bartlett and one Wilfley concentra- ting tables and Bartlett sinner.
 The capacity of the plant is about 50 or 60 tons per day and it is run ming very satisfactory and is quite an important addition to the mining in dustry of this county.