Cyanide Leaching

Thiourea Silver Leaching

Unlike base metals which are readily soluble in mineral acids, noble metals like gold and silver require the presence of oxidizing and complexing agents for dissolution. Silver approaches base metal behavior in acidic thiourea solutions (Ag + 3Thio ↔ Ag(Thio)3+ + e, E° = 0.025 V) requiring only mild oxidizing conditions for dissolution. Accordingly,

←   Read The Full Metallurgy Article
By |2018-04-15T07:00:08+00:00April 15th, 2018|Categories: Cyanide Leaching|Comments Off on Thiourea Silver Leaching

Zinc Box Gold Precipitation

The simplest precipitation equipment for a small mine is what is known as a zinc-box (Fig. 150). This consists of a long, narrow, sloping, wood or painted sheet-iron box divided into wide compartments or cells which are separated by baffle-boards and narrow compartments. The bottom of the box slopes to one side to facilitate the clean-up through

←   Read The Full Metallurgy Article
By |2018-02-11T10:03:45+00:00February 11th, 2018|Categories: Cyanide Leaching|Comments Off on Zinc Box Gold Precipitation

Cyanidation

As coarse gold is not dissolved by cyanide, it must be removed from an ore by one of the methods already described. Weak solutions of sodium cyanide (or potassium cyanide, seldom used) will dissolve the fine, untarnished gold and silver in ores and tailings, provided the latter have been ground fine enough and do not contain any material, such as

←   Read The Full Metallurgy Article
By |2018-02-11T09:37:20+00:00February 11th, 2018|Categories: Cyanide Leaching|Comments Off on Cyanidation

Precipitation of Copper contained Silver leached out with Copper

Having refractory ore under treatment, it is generally the case that copper is also found in it. While roasting, the presence of copper is favorable for the chlorination of the silver, but copper ores require some more salt, especially if it is intended to save the copper also. The more chloride of copper formed, the more will be found in the solution

←   Read The Full Metallurgy Article
By |2018-02-11T09:03:09+00:00February 11th, 2018|Categories: Cyanide Leaching|Comments Off on Precipitation of Copper contained Silver leached out with Copper

Zinc Box Construction and Operation

The precipitation by zinc shavings is carried out in rectangular boxes or troughs, divided by transverse partitions into a number of compartments. The partitions are so arranged that the solution flows alternately downward through a narrow compartment, and upward through a wide one, the latter alone containing the zinc shavings. The height of every

←   Read The Full Metallurgy Article
By |2018-02-11T10:01:45+00:00February 9th, 2018|Categories: Cyanide Leaching|Comments Off on Zinc Box Construction and Operation

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

←   Read The Full Metallurgy Article
By |2018-04-29T10:01:03+00:00June 5th, 2017|Categories: Cyanide Leaching|Comments Off on Ferrocyanides

Batch Cyanidation Leach of Flotation Concentrate

grinding-flotation-batch-cyanidation

The production of gold bullion from gravity or flotation concentrates is often an important economic consideration for an isolated gold mining operation. It is assumed in this case that the coarse free gold has been recovered by the Mineral Jig in the grinding circuit and that the jig concentrate has been amalgamated. This treatment produces

←   Read The Full Metallurgy Article
By |2017-05-24T14:48:17+00:00May 24th, 2017|Categories: Cyanide Leaching, Flowsheets & Flowcharts|Comments Off on Batch Cyanidation Leach of Flotation Concentrate

Cyanide Destruction Hypochlorite / Chlorine

In the Cyanide Destruction by Hypochlorite reaction, the pH has a strong inverse effect on the ORP. Thus, wastewater treatment facilities must closely control the pH to achieve consistent ORP control, especially if they use hypochlorite as the oxidizing agent. Adding hypochlorite raises the pH, which, if unchecked, lowers the ORP. calling for additional

←   Read The Full Metallurgy Article
By |2017-03-19T08:37:04+00:00March 13th, 2017|Categories: Cyanide Leaching, Reagents and Chemicals|Comments Off on Cyanide Destruction Hypochlorite / Chlorine

Extraction Of Silver

The extraction of silver by the solving processes simple. The ore is first roasted with salt in the usual way, whereby the formation of base metal chlorides cannot be avoided entirely. After roasting, the ore is first subjected to leaching with water, in order to extract the base metal chlorides, and then with hyposulphite of lime,

←   Read The Full Metallurgy Article
By |2018-02-11T09:04:10+00:00January 10th, 2017|Categories: Cyanide Leaching|Comments Off on Extraction Of Silver

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

Do you need METALLURGICAL TESTING of your ORE?

View the Services we Provide

911Metallurgist Mineral Processing & Process Development Laboratory

We have a metallurgical test for every possible mineral type and treatment.

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.

I Need Consulting Engineering Help
I Need Ore Laboratory Testing