Concentrator Manuals/Procedures

Mine Backfill Plant

Backfill Preparation Plant: Mine roof support problems were a major concern that necessitated the use of backfill to supplement conventional means of support. Roof supports account for at least one-half the cost of mining at Sunnyside. Roof bolts and round timber are used for roof support, plus yieldable steel arches for severe

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By | 2017-05-23T16:02:02+00:00 May 23rd, 2017|Categories: Concentrator Manuals/Procedures|Comments Off on Mine Backfill Plant

Uranium Extraction Process

The plant was originally designed to treat uranium ores with low lime-high vanadium content from the Lukachukai Mountains. The process utilized is known as the “Acid Cure” and had been developed for the most part by the AEC to increase recovery of vanadium values.

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By | 2018-02-14T08:31:15+00:00 November 24th, 2016|Categories: Concentrator Manuals/Procedures, Flowsheets & Flowcharts|Tags: |Comments Off on Uranium Extraction Process

Mercury Ore Processing Plant (Mining)

The Abbott mercury mine and mill are situated at an elevation of 2,000 feet in Lake County, California, approximately 24 miles west of Williams on State Highway 20 towards Clear Lake. Williams, which is served by the Southern Pacific railroad, is a local supply point as well as Colusa, located 10 miles east of Williams on State Highway 20.



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By | 2017-05-25T01:38:02+00:00 November 23rd, 2016|Categories: Concentrator Manuals/Procedures, Flowsheets & Flowcharts|Comments Off on Mercury Ore Processing Plant (Mining)

Copper Ore Extraction


Aerial view of the Opemiska Copper Mines (Quebec) Ltd., Mill Buildings and Shaft Area.


The Opemiska mine property is in Levy Township in Chibougamau area of Quebec and is comprised of 487 acres of patented claims contiguous with 2,215 acres held under development license. The townsite of Chapais which serves the mine community is

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By | 2017-05-24T14:50:40+00:00 November 23rd, 2016|Categories: Concentrator Manuals/Procedures, Flowsheets & Flowcharts|Comments Off on Copper Ore Extraction

Uranium Milling

Aerial view of Susquehanna-Western, Inc., Uranium Mill near Falls City, Texas. Ore stock piles are upper center. The tailings line is seen at the upper right portion of the photo. Note the flat root and open wall design of the mill building.

The completion of this 300-ton per day mill marked the first commercial plant in Texas to treat uranium ores.

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By | 2017-05-24T14:44:37+00:00 November 22nd, 2016|Categories: Concentrator Manuals/Procedures|Comments Off on Uranium Milling

Copper Lead Zinc Mining


Design and Construction

The mill design and construction was accomplished through the combined efforts of Equipment Company in Colorado, Equipment Company (Peru) S. A., and Sindicato Minero Pacococha S. A. The design objective was a highly efficient mill at a minimum expense, and with plans to allow for a systematic expansion program to increase

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By | 2017-05-23T17:25:06+00:00 November 21st, 2016|Categories: Concentrator Manuals/Procedures|Comments Off on Copper Lead Zinc Mining

How is Copper Ore Processed


In 1948 Trefoil was privileged to publish an Engineering Notebook Bulletin on Development and Pilot Plant Operations at the Nchanga Consolidated Copper Mines Ltd., Chingola, Northern Rhodesia. This article was authored by Mr. H. L. Talbot, then Consulting Metallurgist to the Anglo-American Group of Companies in Northern Rhodesia.

It is now our

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By | 2017-05-23T16:45:19+00:00 November 20th, 2016|Categories: Concentrator Manuals/Procedures|Tags: |Comments Off on How is Copper Ore Processed

Flotation Circuit Process Control

Our subject is “CLASSIC or Not so Advanced but yet Fundamental Flotation Circuit Process Control” Some of you may be familiar with the process; to others it remains a mysterious scheme. To you all I wish to emphasize one point, i. e., flotation is still

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By | 2017-08-20T09:33:49+00:00 June 8th, 2016|Categories: Concentrator Manuals/Procedures, Flotation, Tools of a Metallurgist|Tags: |Comments Off on Flotation Circuit Process Control

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