Blog of Mineral Processing (Metallurgy) Articles

Ball Mills

In all ore dressing and milling Operations, including flotation, cyanidation, gravity concentration, and amalgamation, the Working Principle is to crush and grind, often with rob mill & ball mills, the ore in order to liberate the minerals. In the chemical and process industries, grinding

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By | 2017-10-03T20:26:14+00:00 February 13th, 2017|Categories: Ball Mills, Grinding|Comments Off on Ball Mills

Cone Crusher

Here are facts about the cone crusher known as Hydrocone. This line of hydraulically adjusted gyratory crushers was developed in the smaller sizes some fifteen years ago by Allis-Chalmers to meet a demand for improved secondary or tertiary crushing units. The line is now expanded to include sizes up to 84-in. diameter cones.

This modern crusher is

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By | 2017-07-19T16:36:58+00:00 October 19th, 2016|Categories: Crushing & Screening, Equipment|Tags: |Comments Off on Cone Crusher

Jaw Crusher

jaw-crusherThis crusher is the finest of our lines of jaw crushers which we offer. Others include: Superior, Type “B” Blake, Fine-Reduction and Dodge — sizes, 4 by 6 to 84 by 66 inches. A reciprocating machine, the crushes material in a straight line between jaws — without grinding or rubbing surfaces.

LOWER JAW CRUSHING COSTS

As you compare this jaw crusher

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By | 2017-07-18T11:27:01+00:00 October 18th, 2016|Categories: Crushing & Screening, Equipment|Comments Off on Jaw Crusher

Grinding Mills: Ball Mill & Rod Mill Design & Parts

Common types of grinding mills include Ball Mills and Rod Mills. This includes all rotating mills with heavy grinding media loads.  This article focuses on ball and rod mills excluding SAG and AG mills. Although their concepts are very similar, they are not discussed here.

Photographs of a glass ended laboratory

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By | 2017-03-17T19:22:30+00:00 July 10th, 2016|Categories: Ball Mills, Equipment, Grinding, Mill Liners, Rod Mills, Tools of a Metallurgist|Tags: , , , , |Comments Off on Grinding Mills: Ball Mill & Rod Mill Design & Parts

Mineral Processing and Extractive Metallurgy Methods

A successful search for and development of a new mineral deposit rests not only in its discovery but also in economical processing of the ore. Via the Science of its engineering, Mineral Processing and Extractive Metallurgy allows the evaluation of metal recovery Methods laid-out or expressed as a process flowsheet.

The challenge of discovery and

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By | 2017-03-31T09:57:37+00:00 April 14th, 2016|Categories: Concentrator Manuals/Procedures, Flowsheets & Flowcharts|Comments Off on Mineral Processing and Extractive Metallurgy Methods

Gold Refining Process

To present the essential points of all methods of gold refining commonly practised, as well as those of historic interest,” was the author’s purpose in this volume. The fifteen chapters of which the book consists deal with the Simpler Methods of Early Days;

  • Amalgamation Process;
  • Refining with Oxidising and Chloridising Agents;Gold Refining
  • Sulphur Refining;
  • Refining with Cementation Processes, and by means of Oxygen and Air;
  • Miller’s Process and that adopted at the Melbourne Mint;
  • Parting with Nitric Acid (two chapters);
  • Recovery of Silver from Nitrate Solutions;
  • Refining by Sulphuric Acid;
  • Parting by Electrolysis;
  • Electrolytic Refining of Gold;
  • Separation of Platinum from Gold;
  • Treatment of Cyanide Precipitates;
  • Refining of Gold Slimes by Nitric and Sulphuric Acid; the Nitre Cake Method of Purifying Slimes.
  • How Metallic Minerals Affect Silver and Gold Precipitation

Gold, as it occurs in Nature, is never pure. Occasionally the amount of alloying metal

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By | 2017-07-22T13:57:05+00:00 April 1st, 2016|Categories: Gold Refining|Tags: , , |Comments Off on Gold Refining Process

Mineral Processing Flowsheets

The Mineral Processing Flowsheets shown on the following pages are based on actual data obtained from successful operating plants. Metallurgical data are shown in these flowsheets which incorporate Crushers, Grinding Mills, Flotation Machines, Unit Flotation Cells, and Selective Mineral Jigs as well as other standard milling equipment.

The Flotation

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By | 2017-03-31T10:00:51+00:00 March 8th, 2016|Categories: Flowsheets & Flowcharts|Tags: , , |Comments Off on Mineral Processing Flowsheets

Rock Crushers

Rock Crushers fill the duty of rock size reduction and can be classified in various stages of duties:

  1. Primary crushing is the first crushing stage,
  2. secondary crushing is the second,
  3. Tertiary crushing is the third,
  4. Quaternary crushing is a rare forth stage of rock crushing,

Coarse crushing includes crushing operations discharging at sizes 4- to 6-in. or coarser; intermediate crushing comprises operations taking feeds 6- or 8-in. maximum and making products down to -1/2″ or 3/8″. Fine crushing is reduction

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By | 2017-10-01T15:56:26+00:00 October 1st, 2017|Categories: Various|Comments Off on Rock Crushers

Thickener Process Control Strategy

The objectives of thickener control are varied, but in most instances, the objective is to dewater the slurry, reclaim the clear overflow for reuse in the process, and produce a thickened or more dense underflow, which can either be rejected, in the case of tailings, or used as feed for subsequent unit operations.

The general Process Control Strategy

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By | 2017-10-01T13:36:08+00:00 October 1st, 2017|Categories: Dewatering|Comments Off on Thickener Process Control Strategy

Gravity Concentrators & Jigs Compared

A Gravity Concentrator has the bed fluidized 100% of the time.A Jig is fluidized only 50% of the time.
A Gravity Concentrator works at 150 g forces.A Jig works at 1 g.
Material is caused to move in a lateral movement through the Gravity Concentrator.A Jig has a lateral movement and a vertical movement.
The Gravity Concentrator moves concentrate laterally at very near the speed of the cone and at the same time it moves the gangue being treated in a lateral vertical plane across the concentrate face.A Jig moves concentrate down into the hutch and gangue horizontally across the bed.
Gangue in the Gravity Concentrator picks up speed as it travels through the unit and the more centrifugal speed it picks up the closer it gets to the speed of the Gravity Concentrator.Materiel in a jig also picks up speed horizontally but as it does so it moves away from the speed of the jig which is zero and the faster it goes the less chance there is for concentration.
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By | 2017-09-25T07:31:16+00:00 September 6th, 2017|Categories: Gravity Concentration|Comments Off on Gravity Concentrators & Jigs Compared

Merrill Crowe vs Carbon

merrill crowe vs carbon

Several economic comparisons have been made between carbon systems and Merrill-Crowe systems. One of these, a systematic comparison completed by DeMent and King (1982) is summarized below.

Five separate conventional mills involving both Merrill-Crowe and the CIP processes were compared from an economic viewpoint. The gold concentration on the

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By | 2017-09-04T14:05:54+00:00 August 16th, 2017|Categories: Gold Extraction|Comments Off on Merrill Crowe vs Carbon

Downdraft Tables

downdraft tablesAs well as metal working, welding or cutting, downdraft tables are also used for human dissection tables although rim exhausts are usually used for this purpose. For manual shoe repair and during application of artificial fingernails, downdraft tables are the only type of exhaust possible.

Larger versions are used for sanding, grinding, polishing,

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By | 2017-08-13T01:32:40+00:00 August 11th, 2017|Categories: Reagents and Chemicals, Tools of a Metallurgist|Comments Off on Downdraft Tables

Placer Mining Equipment for Sale BC

Deciding to invest in, buying and mobilise small-scale Gold Placer Mining Equipment BC requires professional, experienced evaluation. The essential criteria should be examined at the outset to see if the given parameters of size and tenor fit. Second, no final decision to mobilize the placer mining equipment should be made until

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By | 2017-08-28T20:39:05+00:00 August 2nd, 2017|Categories: Gravity Concentration|Comments Off on Placer Mining Equipment for Sale BC

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BUY Laboratory & Small Plant Process Equipment

We have all the laboratory and plant equipment you need to test or build/operate your plant.

ENTER our Mining Equipment' Store

We Sell EQUIPMENT for all types of Mineral Treatment PROCESSES and Laboratory Testing needs

Need ENGINEERING Services or Plant TROUBLESHOOTING?

We can IMPROVE ALL PLANTS / Mineral Processing Engineering & LABORATORY Ore Testing

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Contact us for process engineering, metallurgical investigations, plant optimization, plant troubleshooting, needs. WE “FIX” METALLURGY.

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