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Flotation reagents are a crucial processing technology that has remained relatively unchanged since its introduction, though It has seen numerous advancements in both use, technology, and reagents over the years.

Then and now

Initially employed in the mining and mineral processing sectors, it was one of the most significant 20th century enabling technologies. The ancient Greek, Persian, and Egyptian writings are among the earliest indications of this technology’s antiquity.

However, contemporary flotation methods are more a testament to significant technological advancements in flotation chemistry and chemicals than hardware and manual labour.

Flotation-reagents-process

The froth flotation process is about taking advantage of the natural hydrophobicity of liberated (well ground) minerals/metals and making/playing on making them hydrophobic (water-repel) individually to carefully separate them from one another and the slurry they are in.

Mineral Processing

Froth flotation is a method of separating minerals from gangue by exploiting differences in hydrophobicity. Wetting agents and surfactants are used to make the hydrophobic distinctions between valuable material and waste gangue possible.

The selective separation of the minerals makes processing mixed ores a more economically feasible task. It is particularly effective in treating fine minerals and solves the complex recovery process of valuable components in many fine mineral particles. The flotation process separates an extensive range of sulphides, carbonates and oxides before further refinement.

Flotation has advanced considerably in the last decade, introducing froth flotation equipment, froth flotation reagents, and froth flotation technology. These advances have contributed to more than 60% – 70% of the ore in the world being separated by the froth flotation method.

The development of froth flotation has improved the recovery of valuable minerals, such as copper- and lead-bearing minerals. Along with mechanized mining, it has allowed the economic recovery of valuable metals from much lower grade ore than previously possible.

Some of the advantages of the froth flotation method include:

Flotation reagents being used in gold mining floatation tanks

Flotation reagents being used in gold mining floatation tanks.

Different Classifications

Flotation reagents are classified according to the role they play in flotation. Collectors, frothers, regulators, and depressants are used as classifications for such reagents.

How can we help?

It’s essential to work with a supplier that can guarantee consistent quality; Redox can supply within Australia, New Zealand, and the United States and is in a great position to meet and exceed your expectations; contact one of our industry specialists today.

 

 

Gold refining is a process that has been around for centuries and is necessary in producing a high purity product having both value as jewellery and for investment. Prior to purchasing gold in a store, there are many steps that take place before that special investment becomes available to you.

A mining operation requires extensive exploration and development before they can offer gold for refining. On average, it takes 10-20 years of work before an operation is ready for production.

Processing ore to extract the precious metal is the first step in this chain of events, which is followed by recovery and refining in a sequence of processes to achieve the purity required.

Redox Reagent Products

Redox reagent products have been successfully used by our customers for many years. Recently one of our newest clients produced their first bars of gold Doré using our many high-quality reagents.

Gold refining

The reagents worked well as the bar had a very nice clean separation between the yellow gold and the dark grey/black slags. This gold is nice and yellow, a sign of few impurities.

Redox regents were efficient in removing copper and silver that enabled our client to refine 95-99% pure gold from the starting material.

The reagents used were of such high quality that they enabled a great quality flux, in much the same way as making a great cake starts with quality ingredients – so should gold be refined from high-quality fresh ingredients to produce a better product.

Some of the reagents used were:

Our reagents were used to refine the metal bar product and it appears from the above image that the operators were skilled, as seen in the clean separation of yellow gold against dark grey slags. This indicates a nice quality of ore, likely containing less copper than other ores, which would result in a rose gold-like appearance.

Redox offers client’s access to chemical additives which cover the entire vertical integration process of gold production such as:

Typical reagents for gold rooms

Cyanide destruction reagents

Other reagents

Have you considered Glycine?

Redox is a large and experienced supplier of glycine for the Australian market. Glycine is an emergent technology which in some circumstances eliminate the need for cyanide destruction as it prevents the formation of WAD (weak acid dissociable) cyanide whilst simultaneously improving leaching kinetics in difficult to process ores such as reactive iron sulphides or copper rich ores.

Want to know more? Contact one of our industry specialists today and ask them about our wide range of regents.

The general idea behind the ball mill and grinding media is an ancient one, but it was not until the industrial revolution and the invention of steam power that an effective ball milling machine could be built.

 

Grinding Media is primarily used in ball milling (ore processing) and regrind (cement or similar) applications. The critical factor to quality and reliability is the hardness or “wear rate” of the ball media being used. Where there are other forms like rods and cyplebs, the ball is the most common.

 

The three major types of ball media are:

For the ore processing application, most mines will have at least 2 ball mills; a primary and a secondary and occasionally some will utilise a regrind mill.

In the primary and secondary, either forged steel or chrome is used; rarely do they use a combo of both.

In the regrind mill; generally ceramic media is used.

Sizes vary depending on the intended application:

Chrome is broken into “low content chrome” and “high content chrome”. Low content chrome historically has smaller ball size and can replace the need for regrind mill altogether.

Ball mill action

Ball mill in action, front and side views.

Want to know more? Contact one of our industry specialists today and ask them today.

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