The Colorado and Philadelphia Chlorination Mill, at Colorado City started in November to handle 200 tons per day.

Reduction Works - Colorado City:

Name: COLORADO-PHILADELPHIA REDUCTION CO.
Type: Chlorination
Capital: $350,000
President: Charles L. Tutt
Vice-President: C. M. MacNeill
Secretary:
Treasurer: Spencer Penrose
Superintendent:
General Manager: C. M. MacNeill
Manager:
Lessees:
Description: plant, 250 tons capacity
Employes: 125 employees.
Contact: Colorado Springs office, 25.5 North Tejon street
Notes:

The April's output of gold from Cripple Creek has been computed and the figures at hand show increase rather than diminution of the steady stream of wealth flowing from the mines. During this month the Colorado-Philadelphia outputted 6,000 tons.

The Colorado-Philadelphia chlorination mill in Colorado City treated during June fully 7,000 tons for a total of $196,000.

The July output of gold ore, in spite of the fact that the month claimed a long holiday, the return from the Colorado-Philadelphia Mill show same high standard as set in June. The mill treated 7,500 tons with average value of $31.00 to a total of $232,500.00.
This is an increase of 500 tons since June.

During 1897 the Colorado-Philadelphia Reduction Works in Colorado City, using chlorination and running exclusively on Cripple Creek ores, treated 59,051 tons with a production value of $1,562,100.

The barrel chlorination process has reached its highest development in the Cripple Creek district, where the works of the Colorado-Philadelphia Reduction Co. at Colorado City are one of the largest and most lately constructed of any in the United States.
In regards to Mechanical Concentration in Connection with Chlorination, the mill have installed 20 Wilfley tables to rework about 30,000 tons of old tailings and also those which are being made currently at the rate of about 200 tons a day. These tailings are said to average $1.25 per ton. It is intended to concentrate about 75 to 1.

The Colorado-Philadelphia Reduction Co. works were in operation during 1898.

The Colorado City Chlorination Works.

These works, owned by the Colorado-Philadelphia Reduction Co., were described by H. V. Crowell, in the Engineering and Mining Journal, Oct. 8, 1898 on page 425.

The ore is comminuted by Gates crushers and Reliance belted rolls, of which there are two sets of 14x36 in. in the sampling department and six sets of 14x30 in. in the crushing department proper; these crush the ore to pass a 12-mesh screen with No. 19 wire; ordinarily 5 sets of rolls crush 230 to 250 tons per 24 hours to this size.
There is the usual system of belt elevators and revolving trommels, though there are some new devices in connection therewith. A novel arrangement is the position of the main line shaft, which is placed on the ground floor directly under the rolls.
The roasting department is equipped with two 100x14 ft. Ropp furnaces and one 8 ft. Pearce, having a combined capacity of 200 to 225 tons.
The ore, containing 2.6 to 3.5% S, is reduced to 0.02% S after deducting soluble sulphates. The Ropp furnaces do 90 to 94 tons per day and the Pearce 55 to 62.
Oil residuum is used for fuel, and the results are said to be excellent, the temperature of the furnace being absolutely under control.
The roasting furnaces and the drying furnaces connect with the dust chamber. The roasted ore is cooled in a Durant automatic cooler, after which it is conveyed mechanically to the chlorinating department.
The latter is equipped with 10 barrels, each 6 ft. in diameter and 12 ft. long, arranged to turn at 4 r.p.m., and holding 19,000 lb. of ore at a charge. They are piped so that the pressure can be used either from the main water supply tank or from the steam pump.
The filters in the barrels are constructed of a sheet of 4-lb. lead, with fine perforations, supported by a sheet of lead ⅜-in. thick, with ⅜-in. perforations, and held in place between two gratings of hard wood. The last are fixed by cross bars keyed under side bars bolted to the shell of the barrel.
The heads of the barrel are made of cast iron heavily ribbed, and are designed to withstand a pressure of 100 lb. per sq. in. The shell is made of ⅝-in. steel. The barrel is lined throughout with 24-lb. sheet lead.
The chemicals are carried from the store room to the barrels in buckets suspended from two wheeled crawls running on overhead tracks. In this way the time of charging is made very short.
In the operation of the barrels the usual practice is followed. They are rotated from one to three hours. In filtering, a pressure of 20 to 40 lb. per sq. in. is maintained. The time of filtration varies from 45 minutes to four hours.
The settling tanks have a capacity of 80,000 gal. They are lined with 6-lb. lead.
The precipitation tanks have a capacity of 60,000 gal. Hydrogen sulphide is employed as precipitant. The sulphides after roasting contain 72% Au, producing bullion 0.940 fine or over; the slag from the melting contains about 0.5% of the total value handled.
There is the usual system of pressure tanks, filter presses, melting furnaces, etc. The works treat from 4,500 to 6,500 tons per month.
There is very little manual handling of the ore and in design and construction the works are thoroughly modern.*

* Much of the information in this account is taken from a private letter from C. M. MacNelll, Esq., general manager of the works.

Colorado-Philadelphia mill output for September was 8,500 Tons of average valued ore of $35 to a total Value of $ 297,500.

During December 1899 the Colorado-Philadelphia Mill in Colorado City output was 8,200 tons of average value $35 for a total of $287,000. While the value output for the Cripple Creek District was $2,968,250.

Denver, Colo., Feb. 2, 1900—During January the Colorado-Philadelphia plant in Colorado City processed 8,500 tons making a bullion value of $297,500.

During February the Colorado-Philadelphia mill outputted 8,500 tons with average value of $35.00 for a total of $297,500.

Denver, Colo., March 15, 1900—Colorado & Philadelphia Reduction Co., chlorination, at Colorado City, addition to present plant, 110 tons a day, now completed.

The Colorado-Philadelphia plant treated 10,000 tons of ore at value of $36 during November, for a total of $ 360,000.

The Colorado, Philadelphia and Standard output during September was 24,000 tons with a value of $28 for a total of $672,000.

Officers of the United States Reduction and Refining Company announce that within two weeks work will be started on the chlorine gas plant to be erected at Colorado City in conjunction with the Standard and Colorado plants.

U. S. Reduction and Refining Company.—This company has let contracts for a new cyanide plant to cost $15,000. The plant is to be erected at Colorado City and is to be run in connection with the Colorado-Philadelphia mill. Its capacity is to be 20,000 tons a month, and will treat the large dump, containing 1,000,000 tons, in the vicinity of the company’s property.

Contracts have just been let by the United States Reduction & Refining Company for the erection of a large cyanide plant which the company will build in Colorado City. The plant is to be run in connection with the Colorado-Philadelphia mill of the above named company, and will treat the big dump of the reduction company. It is expected that 20,000 tons will be handled per month until the 1,000,000 tons lying in the dump has been treated.

United States R. & R. Co.—The new $15,000 cyanide plant of this company in Colorado City was started up last week. As soon as the tanks are leached the concentrator attached to the old Colorado-Philadelphia mill will be put in operation.

The new cyanide mill of the United States Reduction & Refining Company at Colorado City will also be ready for operation this week. This plant was built for the purpose of treating the waste rock from the reduction works, and from tests already made it is known that the company will realize handsomely from its investment in the mill.

Denver, Colorado.—The United States Reduction & Refining company shut down its Colorado-Philadelphia plant about two and a half years ago, and it was thought in local mining circles that this mill would reopen in the near future. The mill has been kept in perfect order, ready for resumption at an hour's notice.

DISMANTLING AN OLD MILL.
———
The United States Reduction & Refining Co. announced a few days ago that it will dismantle the old Colorado-Philadelphia reduction mill in Colorado City and will sell the machinery to the highest bidder.
The plant, which was built in 1896 at a cost of $540,000, stopped in 1904, the Standard mill adjoining, which was then just completed, taking its place.
The Standard plant, which comprises the chief equipment of the company, ceased operations January 1, but is being kept in the best of shape to reopen at a moment's notice, when the output of the Cripple Creek district warrants.
The Colorado-Philadelphia machinery is complete for a 300-ton mill.

MACHINERY DISMANTLING SALE
All machinery and metal contained in The Colo.-Phila. Plant at Colorado City, Colo. This equipment consists of Gates Crusher and complete sampling equipment, Ropp Drying Furnace, Allis Crushing Rolls, Prinz & Rau Dust Collectors, Ropp, Pierce and Holthoff Furnaces, Allis Chlorinating Barrels, Montejus Tanks, Oil Tanks, Receivers, R. D. Wood Producer Gas Equipment, Wilfley Tables, Deane, Snow and Prescott Pumps, 235-H. P. Reynolds Corliss Engine, 90-H. P. Reynolds Corliss Engine; Erie, Buffalo and Atlas Automatic High Speed Engines.
In fact all equipment necessary in the operation of an Ore Reduction Plant of 300 tons capacity. This plant will be dismantled and is now open for inspection and bids. For information address
GENERAL MANAGER,
Box 748, COLORADO CITY, COLORADO.

MACHINERY DISMANTLING SALE
All machinery and metal contained in The Colo.-Phila. Plant at Colorado City, Colo. This equipment consists of Gates Crusher and complete sampling equipment, Ropp Drying Furnace, Allis Crushing Rolls, Prinz & Rau Dust Collectors, Ropp, Pierce and Holthoff Furnaces, Allis Chlorinating Barrels, Montejus Tanks, Oil Tanks, Receivers, R. D. Wood Producer Gas Equipment, Wilfley Tables, Deane, Snow and Prescott Pumps, 235-H. P. Reynolds Corliss Engine, 90-H. P. Reynolds Corliss Engine; Erie, Buffalo and Atlas Automatic High Speed Engines.
In fact all equipment necessary in the operation of an Ore Reduction Plant of 300 tons capacity. This plant will be dismantled and is now open for inspection and bids. For information address General Manager, Box 748, Colorado City. Colorado.