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 | 2017-06-02T08:49:16+00:00 February 13th, 2017|Categories: Ball Mills, Grinding|Comments Off on Ball Mills

Cone Crusher

cone crusher 1Here 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

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By | 2017-04-27T23:56:20+00:00 October 19th, 2016|Categories: Crushing & Screening, Equipment|Tags: |Comments Off on Cone Crusher

Jaw Crusher

jaw-crusherThis jaw 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 CRUSHING COSTS

As you compare this jaw crusher

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By | 2017-06-02T08:58:51+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 | 2017-03-19T03:00:40+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

Ferrocyanide Methods of Analysis & Assay Procedure

QUALITATIVE DETECTION

Because of the distinctive colors of the precipitates formed, various cations have been proposed for the qualitative detection of the ferrocyanide ion. Since interference frequently occurs, some care is usually necessary. As an illustration, the following condensed procedure serves for the detection of the ferrocyanide ion in the presence of ferricyanide

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By | 2017-06-20T09:40:14+00:00 June 20th, 2017|Categories: Laboratory Procedures, Reagents and Chemicals|Comments Off on Ferrocyanide Methods of Analysis & Assay Procedure

Ferrocyanide Toxicity

ferrocyanide-toxicity

It is generally agreed that the ferrocyanide ion is of a low order of oral toxicity, even in relatively large dosage. Kobert states that potassium ferrocyanide in alkaline solution is nontoxic. In Precis de Toxicologie it likewise is asserted that this salt is nonpoisonous and that it is useful as a diuretic. There is recorded a case of ingestion

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By | 2017-06-20T09:32:53+00:00 June 20th, 2017|Categories: Reagents and Chemicals, Safety|Comments Off on Ferrocyanide Toxicity

Ferrocyanides Usage & Applications

ferrocyanides-applications

Alkali metal ferrocyanides and their easily obtainable derivatives such as ferricyanides, nitroprussides, and hydroferrocyanic acid have found application in a wide variety of fields during the two centuries that they have been known. Through continued research new uses are being uncovered with increasing frequency.

Most of these applications

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By | 2017-06-20T09:31:12+00:00 June 20th, 2017|Categories: Reagents and Chemicals|Comments Off on Ferrocyanides Usage & Applications

Hydroferrocyanic Acid

hydroferrocyanic-acid

PHYSICAL PROPERTIES of Hydroferrocyanic Acid

ferrocyanide-physical-properties

Hydroferrocyanic acid is most conveniently prepared by the treatment of an alkali metal ferrocyanide with a strong mineral acid. A typical preparation would involve the treatment of a saturated aqueous solution of potassium ferrocyanide with concentrated hydrochloric acid. The acid separates as a crystalline solid that may be purified further

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By | 2017-06-20T09:25:24+00:00 June 20th, 2017|Categories: Reagents and Chemicals|Comments Off on Hydroferrocyanic Acid

Ferrocyanides

The study and use of ferrocyanides was initiated with the discovery of the pigment ?Prussian Blue? by Diesbach in 1704. Thus, they are among the earliest commercial chemicals and have been produced in large quantities for many years. In the United States, American Cyanamid Company, with its ample supplies of cyanides

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By | 2017-06-20T09:44:41+00:00 June 5th, 2017|Categories: Cyanide Leaching|Comments Off on Ferrocyanides

Slurry Flow Rate Through a Mill

The factors upon which the rate of flow of the pulp through a mill depends appear not to have received extensive investigation. In an article by Anselm translated by Pearson a method for the calculation of the time of passage of cement through a ball mill was given. The basis of the method is that the volume rate of throughput is

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By | 2017-05-30T08:21:58+00:00 May 30th, 2017|Categories: Grinding|Comments Off on Slurry Flow Rate Through a Mill

Grinding Mill Surging

The phenomenon of “surging” in a mill is a subject upon which very little has been written; presumably because it is a condition which cannot be tolerated in mill operation and which must be eliminated by variation of some or many of the physical dimensions or characteristics of the mill or mill charge.  The phenomenon known as “surging”

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By | 2017-05-30T08:45:08+00:00 May 30th, 2017|Categories: Ball Mills, Grinding|Comments Off on Grinding Mill Surging

Effect of Grinding Media on Milling

In the previous chapter the influence of the various physical quantities defining the mill and mill charge has been studied in connection with the performance of a mill as a device for the creation of new surface in the powder. For some purposes, however, it is also desirable that the product should have a preferred form of size distribution curve.

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By | 2017-05-30T08:25:23+00:00 May 30th, 2017|Categories: Ball Mills, Grinding|Comments Off on Effect of Grinding Media on Milling

Effect of Pulp Rheology on Grinding Mill Power

The dependence of the power demand of a mill on the nature of the pulp does not appear to have received a great deal of study, and, in general, observations on this matter take the form of general statements. For example, Taggart states that, other things being equal, wet milling

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By | 2017-05-30T08:25:12+00:00 May 29th, 2017|Categories: Grinding|Comments Off on Effect of Pulp Rheology on Grinding Mill Power

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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

911Metallurgy Engineering

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