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Nothing contained in the calculators, equations or other information on this website constitutes advice. Access to the calculators, equations and other information is donated for academic and research purposes only, and must only be used by qualified comminution/process engineers. Comminution/Process engineers considering the calculators, equations and other information must use their own professional judgement, knowledge […]
Toll Milling in Peru
The Peruvian government estimates that illegal mining accounts for about 20% of gold exports. This mining is done by tens of thousands of artisanal, small-scale miners who use metallurgical processes from centuries ago.
Geology For Dummies
Enter Geology- For Dummies! The goal of this book is to break through the overwhelming array of geology information and provide a quick reference for key concepts in the study of the earth. Geology is the study of the earth. By default this means that geology is a vast, complex, and intricate topic. But “vast, […]
Beginner Guide to Gold Prospecting
For those of us with even the slightest inkling of gold prospecting in our blood, we know there is no shortage of information out in the world on how to do it. Regardless of our individual experience on mining for gold, we all face the same conundrum on what to do with all the information […]
Orogenic-Mesothermal-Greenstone Gold Deposits Exploration
How to explore or “go prospecting” for a Orogenic-Mesothermal-Greenstone Gold Deposit is described herein starting with what exploration tool can be used? First is magnetic surveys can be very useful exploration tools, when looking for bends and structures that the potential host Greenstone/Orogenic shear hosted gold deposits and mineralization. Gravity surveys can be very […]
IOCG Iron Oxide Copper Gold Ore Deposits
IOCG Iron Oxide Copper Gold Ore Deposits goes with porphyries as they are also loosely associated with a large felsic intrusions and form at moderate depths, unlike the dominantly tertiary porphyries IOCG’s tend to be much older and are generally protoizoic in age from 1.1 to 1.8 billion years ago. There are some younger ones […]
Crazy Crusher
Hand Operated Jaw Type Ore Crusher – Grinder That above, looks crazy, but this below IS Totally CRAZY! Figure 66 shows the Taylor Hand Crusher. This consists of two jaws, one of which is stationary and one of which is operated by the hand lever. Both jaws are faced with hard white iron. The movable […]
Flotation: From Alchemy & Art to Physics and Science
In a recent reminiscence my friend Ben Stanley Revett has recorded how he bet “a bottle of bubbles” with that peripatetic philosopher Thomas F. Criley, the partner of Carrie Jane Everson in an oil process of concentration whereby the valuable sulphides were made to float above the worthless gangue in a pulp of crushed ore. […]
Crushing and Crusher Research Articles
The art of crushing A Single Value Chain Process 2 Crushing Principles of Mechanical Getting Control Scott Drilling Applications-2 Part A The Chemical Crusher Drilling and Blasting Drill Time Drill Cost Mine Quarry Planning Lean Thinking Applied (2) Blast management Environmental impact Liability and Risk Associated With Quarry Operations The Chemical Crusher Drilling and Blasting […]
Sequential Copper–Lead–Zinc Flotation
To improve the selectivity between copper and lead, a sequential copper-lead-zinc rougher circuit was tested. Each of the rougher circuits had a dedicated regrind and cleaner circuit. The advantages of the sequential circuits are that the levels of selectivity can be increased, particularly for copper and lead. With this process, copper was recovered first with MBS depression of lead, […]