Author: Lloyd M. Kniffin
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 32
Book Description
This paper is one of series being prepared by the United States Bureau of Mines on mining methods, practices, and costs in the various mining districts of the United States. It describes the mine of the Hanover Bessemer Iron & Copper Co. at Fierro, Grant County, N.M., which is the only operating iron mine in the southwestern part of the United States. This mine is in a district noted for the great variety of ores that it produces. Within a small area, as shown is Figure 1, there are noteworthy deposits of nearly all the common metals. The ore occurs in lenticular masses dipping at about 50°. An underhand stoping method has been developed that requires but a very small amount of handling of ore. As the ore is very irregular in iron content and also in the distribution of the impurities--chiefly sulphur, silica, and magnesia--a method has to be used that will permit selective mining and will also allow ore and waste to be taken out separately as conditions change. A magnetic cobbing plant raises the grade of the ore shipped about 10 per cent. Nealy all of the iron ore is shipped to Pueble, Colo., a distance of 694 miles, where it is smelted by the Colorado Fuel & Iron Co. The mine is not a large producer, as the long distance from blast furnaces limits its output. In recent years the annual shipments have amounted to about 200,000 tons. The property is noteworthy chiefly on account of this long transportation by rail and the economical methods that have been developed to make the operation profitable. About 175 men are employed.
Mining and Engineering Methods and Costs of the Hanover Bessemer Iron & Copper Co., Fierro, N. Mexico
Author: Lloyd M. Kniffin
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 32
Book Description
This paper is one of series being prepared by the United States Bureau of Mines on mining methods, practices, and costs in the various mining districts of the United States. It describes the mine of the Hanover Bessemer Iron & Copper Co. at Fierro, Grant County, N.M., which is the only operating iron mine in the southwestern part of the United States. This mine is in a district noted for the great variety of ores that it produces. Within a small area, as shown is Figure 1, there are noteworthy deposits of nearly all the common metals. The ore occurs in lenticular masses dipping at about 50°. An underhand stoping method has been developed that requires but a very small amount of handling of ore. As the ore is very irregular in iron content and also in the distribution of the impurities--chiefly sulphur, silica, and magnesia--a method has to be used that will permit selective mining and will also allow ore and waste to be taken out separately as conditions change. A magnetic cobbing plant raises the grade of the ore shipped about 10 per cent. Nealy all of the iron ore is shipped to Pueble, Colo., a distance of 694 miles, where it is smelted by the Colorado Fuel & Iron Co. The mine is not a large producer, as the long distance from blast furnaces limits its output. In recent years the annual shipments have amounted to about 200,000 tons. The property is noteworthy chiefly on account of this long transportation by rail and the economical methods that have been developed to make the operation profitable. About 175 men are employed.
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 32
Book Description
This paper is one of series being prepared by the United States Bureau of Mines on mining methods, practices, and costs in the various mining districts of the United States. It describes the mine of the Hanover Bessemer Iron & Copper Co. at Fierro, Grant County, N.M., which is the only operating iron mine in the southwestern part of the United States. This mine is in a district noted for the great variety of ores that it produces. Within a small area, as shown is Figure 1, there are noteworthy deposits of nearly all the common metals. The ore occurs in lenticular masses dipping at about 50°. An underhand stoping method has been developed that requires but a very small amount of handling of ore. As the ore is very irregular in iron content and also in the distribution of the impurities--chiefly sulphur, silica, and magnesia--a method has to be used that will permit selective mining and will also allow ore and waste to be taken out separately as conditions change. A magnetic cobbing plant raises the grade of the ore shipped about 10 per cent. Nealy all of the iron ore is shipped to Pueble, Colo., a distance of 694 miles, where it is smelted by the Colorado Fuel & Iron Co. The mine is not a large producer, as the long distance from blast furnaces limits its output. In recent years the annual shipments have amounted to about 200,000 tons. The property is noteworthy chiefly on account of this long transportation by rail and the economical methods that have been developed to make the operation profitable. About 175 men are employed.
Mining and Engineering Methods and Costs of the Hanover Bessemer Iron & Copper Co., Fierro, N.M.
Author: Lloyd M. Kniffin
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 0
Book Description
Mining and Engineering Methods and Costs of the Hanover Bessemer Iron & Copper Co., Fierro, N. Mex
Author: L. M. Kniffin
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Copper mines and mining
Languages : en
Pages : 20
Book Description
Mining and Engineering Methods and Casts of the Hanover Bessemer Iron and Copper Co., Fierro, New Mexico
Author: United States. Bureau of Mines
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
Bulletin
List of Publications
Author: United States. Bureau of Mines
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 252
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 252
Book Description
Geology and Ore Deposits of the Bayard Area, Central Mining District, New Mexico
Author: Samuel Grossman Lasky
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 836
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 836
Book Description
Bibliography of Geology and Hydrology, Southwestern New Mexico
Author: Ann Finley Wright
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 264
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 264
Book Description
Bulletin of the United States Geological Survey
Milling Methods at the Concentrator of the Walker Mining Co., Walkermine, Calif
Author: M. R. McKenzie
Publisher:
ISBN:
Category : Gold ores
Languages : en
Pages : 1336
Book Description
This paper describing the milling methods at the Walkermine concentrator, Plumas County, Calif., is one of a series being prepared by the United States Bureau of Mines on milling methods and costs in the various mining districts throughout the United States
Publisher:
ISBN:
Category : Gold ores
Languages : en
Pages : 1336
Book Description
This paper describing the milling methods at the Walkermine concentrator, Plumas County, Calif., is one of a series being prepared by the United States Bureau of Mines on milling methods and costs in the various mining districts throughout the United States