Blog of Mineral Processing (Metallurgy) Articles

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 is the result of many years of experience in building all types of crushing equipment, when the first gyratory or cone crusher, the Gates, was put into operation. Over all these years AC has followed a continuing policy of improvement in crusher

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By | October 19th, 2016|Categories: Crushing & Screening, Equipment|Tags: |Comments Off on Cone Crusher

Jaw Crusher

jaw-crusherThis jaw crusher is finest of 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 feature for feature with other makes you’ll see how this modern crusher lowers principal costs—power consumption; lubrication; jaw plate, toggle plate and bearing wear you’ll understand why we say the crusher promises you a new low cost per

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By | October 18th, 2016|Categories: Crushing & Screening, Equipment|Comments Off on Jaw Crusher

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 development, the processing and profit from mineral resources have resulted in many different process flowsheets. There has been a constant advance in mineral technology for hundreds of years. The process flow we consider highly successful today may

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By | 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

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By | 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 Machine, the Selective Mineral Jig and the Unit Flotation Cell have revolutionized flowsheet design and have made it possible for both small and large plants to increase recoveries and economical return. The Unit Flotation Cell and

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By | March 8th, 2016|Categories: Flowsheets & Flowcharts|Tags: , , |Comments Off on Mineral Processing Flowsheets

Gyratory Crushers

The below image shows a sectional view of a typical gyratory crusher. This type of machine is, by virtue of chronological priority, known as the “standard” gyratory crusher. Although it incorporates many refinements in design, it is fundamentally the same crusher that first bore the name of “gyratory”; its crushing chamber is very much the same shape; the motion is identically the same, and the method of transmitting power from belt to crushing head is similar. It

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By | February 17th, 2016|Categories: Crushing & Screening|Comments Off on Gyratory Crushers

Gravimetric Analysis Precipitation Reactions Examples

The conditions essential to accurate gravimetric analysis have been given. As a rule such estimations come under one of four classes:

Direct Estimations

These are the most usual and accurate methods of gravimetric analysis. The element sought is precipitated and weighed generally as a compound, definite in composition.

Direct Estimation by Loss

Here the element sought is volatile or forms a volatile compound and is driven off, the weight being taken as the volatilisation loss.

Indirect Estimation

When the previous methods are difficult these are used. If, for instance, Na or K are to be determined, unite them to Cl or SO4, say to the latter, and weigh the joint

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By | January 20th, 2017|Categories: Laboratory Procedures|Comments Off on Gravimetric Analysis Precipitation Reactions Examples

Quantitative Chemistry Gravimetric Analysis: PRECIPITATE

WASHING THE PRECIPITATE: A precipitate may be washed directly on the filter, or it may be washed partly by decantation and partly on the filter. If by decantation, the precipitate is allowed to settle, and the supernatant liquid is poured on the filter. Wash water is added to the precipitate, and after settling, the decantation is repeated a few times, and finally the precipitate is transferred to the paper or Gooch crucible.

Whatever method of washing be used, it must be thorough; and that this may be so, both the precipitate and the paper or asbestos must be washed free from all traces of

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By | January 20th, 2017|Categories: Laboratory Procedures|Tags: , |Comments Off on Quantitative Chemistry Gravimetric Analysis: PRECIPITATE

Gravimetric Analysis: Substance into Solution

Material of Vessels for Solution

The student must consider the effect of the solvent used on the vessel. In most cases the solvent used is an acid or mixture of acids, and for such solvents glass and porcelain are generally used. Platinum may be used, provided no chlorine or other attacking agent be present. (See notes regarding care and use of platinum crucibles.) For strong alkalies silver or nickel vessels should be used, as glass is attacked sensibly by hot and even cold solutions of caustic potash or soda, and porcelain is also attacked to some extent.

Methods of Solution & Apparatus used

When a substance is soluble in water

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By | January 19th, 2017|Categories: Laboratory Procedures|Tags: |Comments Off on Gravimetric Analysis: Substance into Solution

Gravimetric Analysis: Precipitation

After solution, certain minor operations may or may not be necessary, but as a rule the next essential operation is that of precipitation. In his qualitative work the student has already come across many cases of precipitation, and he will find that many of the methods there used are again applied for quantitative purposes. Silver, for instance, is precipitated as the chloride AgCl, copper as the sulphide by H2S, iron as the hydroxide by NH4HO, and so on. He will also find that some methods are introduced which are either not used or are of minor importance in qualitative

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By | January 19th, 2017|Categories: Laboratory Procedures|Tags: |Comments Off on Gravimetric Analysis: Precipitation

Gravimetric Analysis: Precipitate Filtration

When precipitation is complete the precipitate must be separated from the solution. The means of bringing about this separation will be described under this head. Under the next head (Washing) the completeness of this separation will be considered.

Filtering Medium

In quantitative gravimetric analysis the two materials generally used are paper and asbestos, and the student must be familiar with the use of both of these. He has already used paper in his qualitative work, but in quantitative analysis paper of a special quality must be used. This paper in various qualities may be obtained from the dealers. It is

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By | January 19th, 2017|Categories: Laboratory Procedures|Tags: |Comments Off on Gravimetric Analysis: Precipitate Filtration

Quantitative Analysis Chemistry: GRAVIMETRIC METHODS

In the course of work completed, the problem so far met with has been the determination of the various elements (or compounds) present in a substance. In an ore, for instance, there may be present silica, iron, copper, arsenic, and sulphur, and it is the province of qualitative analysis to determine the presence or absence of these and other elements. It is obvious, however, that there still remains an unknown factor, namely, the quantity of each element present in any given substance. Having found that the ore contains the substances mentioned, the student is now asked how much silica, iron

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By | January 18th, 2017|Categories: Laboratory Procedures|Tags: |Comments Off on Quantitative Analysis Chemistry: GRAVIMETRIC METHODS

Analytical Balance

Analytical Balance Principle

In this place it will be sufficient to describe the usual chemical balance, designed to carry in each pan a load up to 100 gms. This balance can be obtained at a reasonable figure, and sensitive to 1/10 of a milligram (0.0001 gm.). In the section on Assaying the student will find two other forms—Pulp Scales and the Assay Balance— mentioned. The pulp

Scales are cheap, and sensitive to about 1/100 gm., and serve well for weighing quantities of 20 gms. and over. The assay balance is more sensitive than the chemical balance, but its range is shorter (from .5 gm. to .00005 gm.). The student who

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By | January 18th, 2017|Categories: Equipment, Laboratory Procedures|Tags: |Comments Off on Analytical Balance

Froth Flotation: A Century of Innovation

Start following 911Metallurgy’s Linkedin page to get a free (my used) copy of:

Froth Flotation: A Century of Innovation

by Maurice C. Fuerstenau, Graeme J. Jameson, Roe-Hoan Yoon

I will select a winner from All the Company’s Followers on February 4th 2017 and announce the winner on 911Metallurgy’s Linkedin page
CLICK BELOW ON FOLLOW

Contact via Linkedin will be attempted with the winner and if not reply is obtained by February 6th 2017, I will select another.

I will mail the book to the winner, wherever in the World that winner is located.

GOOD LUCK!

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flotation handbook

Froth

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By | January 17th, 2017|Categories: Various|Tags: |Comments Off on Froth Flotation: A Century of Innovation