• Mining Reagent

Mining reagents

Our portfolio of mining reagents is focused on production process ehancement, yield recovery improvement, metal purity improvement as well as reduction in reagent consumption. The range of products is backed by both local as well as International full qualified Metallurgical support. The Mining reagents portoflio that we  currently offer, include the following:

OXIDE MINERAL COLLECTORS:

The AkzoNobel range of oxide collectors can help improve your recovery or concentrate quality with the following identifed minerals:

Apatite, calcite, dephosphorization
Dolomite, feldspar, fluorspar
Graphite, iron ore, kyanite, magnesite
Monazite, potash, pyrochlore, quartz
Scheelite, silica, zinc oxides
Uranium (solvent extraction collectors)
 
SULPHIDE MINERAL COLLECTORS:
 
The range of Cheminova DANAFLOAT'S (www.danafloat.com) predominantly sulphide mineral targeted collectors are based on Dithiophosphates, which are manufactured at their primary production site in Denmark. The primary advantages of Dithiophosphate based technology is that it is possible to optimize the product according to collecting strengths and selectivity towards the different minerals. The Dithiophosphate are good collectors for sulphide minerals for a broad variety of metals such as: Cu, Au, Ag, Pb, Pt, Zn etc…

Some of the ores considered are , as follows:

 In the case of the ore containing oxides, a blend between MBT and dithiophosphate is preferred.The Cheminova Danafloat products are characterized by high concentration and purity levels and the main advantage here is that it is possible to lower dosage ratios of the collectors themselves. This high purity improves the performance and also ensures batch to batch consistency which are key issues for flotation mineral processing.

FROTHERS:

Cheminova's Danafloat™ line of sulfide mineral collectors are manufactured in state of art facilities with rigorous adherence to high production standards. Consequently the Danafloat™ collectors have low raw material and side reaction chemical residual levels, often resulting in lower frothing tendency in mineral flotation circuits vs. competitive products. Lower frothing collectors provide a metallurgical advantage that enhances control and management of hydrodynamic conditions through frothers.

A consequence of the Danafloat™ lower frothing tendency is that, depending on circuit and system conditions, often frother optimization is required to gain full metallurgical benefit from a Danafloat™ collector programme. Just increasing the frother dose may be insufficient to achieve maximum Danafloat™ collector performance. So a frother chemistry change or a frother reformulation adjustment is needed to ensure the froth has sufficient mineral carrying capacity to maximize the grade-recovery relationship (shifting the G-R curve to the right). 

Cheminova offers selected Danafloat™ FRO frothers for Danafloat™ collector performance optimization. Fundamentally and ideally collectors make targeted minerals hydrophobic without impacting flotation hydrodynamics. And frothers produce small uniform bubble sizes for good particle-bubble hydrodynamics in the cell for mineral collection while the froth phase allows good drainage for upgrading. At the same time it exhibits good mineral-laden froth carrying capacity and stability to ensure the froth effectively reaches the launder lip. This is the ideal, and since collectors are surfactants, which can have varying bubble surface tension effect, Danafloat™ collectors often provide comparable and noticeably lower frothing tendency. 

Through our association with CALDIC, we are now also able to supply a range of flotation frothers (MIBC, Poly glycols) and defoaming agents (glycol or ethyl based). In addition, we are able to offer CMC Depressants, Sodium Hydrogen Sulphide liquid concentrates (NaSH) essentially used as Copper Sulphidizing agent or as a Copper depressant.

DEPRESSANTS:

Depramin® is an AKZO NOBEL Carboxymethyl Cellulose depressant portfolio that has found general acceptance in the flotation of Potash, Pentlandite (Nickel), Copper, lead and Zinc sulfides and Precious metals (Gold, Platinum Group Metals). The primary function in Froth flotation is a physico-chemical separation process based on a difference in hydrophobicity between the desired minerals and the unwanted minerals ("gangue") like talc, serpentine, chlorite, anhydrite. Depramin products render gangue hydrophilic and improves selectivity. Depramin is the trade name for a family of "tailor made" watersoluble polymers especially developed for application in froth flotation. Depramin can have a low- or high molecular weight and can have dispersing or coagulating properties.

POLYMERIC BINDERS:

Peridur® Peridur is a formulation based on cellulose, capable of immobilizing water during the pelletizing process giving operators the control need to affect pellet growth rates and sizing.

Peridur is a non-contaminating organic binder for the agglomeration of iron ore pellets. Unlike Bentonite, Peridur contains no elements like silica or aluminum that would affect (the economics of) the steel making process. Peridur can replace Bentonite or can be used together. Peridur is the tradename for a family of watersoluble polymers especially developed for application in Iron Ore Pelletization. All Peridur grades are customized towards the process, ore characteristics and requirements of our clientele.

BULK LIQUID NaSH 

We have an exclusive reputable supply source of liquid NaSH concentrate from AKZO NOBEL Global supply sources Argentina, Germany and the USA.  The benefits of not having to dilute, dispose of excess packaging, when using liquid as a “ready-to-use” concept product can be extremely beneficial to mining Companies from a processing and environmental perspective . AKZO NOBEL are selling to end-users with world-class environmental and safety care standards, and relatively high manpower costs. 

NaSH as copper depressor:

The product is used to separate copper from an ores concentrate stream, by depressing it, making use of NaSH´s strong potential to generate H2S in an acid media. A typical example of this application is the case of Molybdenum Plants, where the molybdenum present in a copper collective concentrate is separated in flotation cells where simultaneous mechanisms of molybdenum flotation and copper depression take place. Other example is the separation of copper traces from Nickel concentrates. In the end, wherever it is necessary to separate copper by depression in flotation cells, NaSH is the most effective reagent to do the job. 

NaSH as sulphidizing agent:

The NaSH makes sulphides out of oxide ores. In a flotation process to concentrate sulphide ores where a suitable content of oxides also is present; it is possible to use NaSH to sulphidize the oxides, increasing the ore extraction yield up to 3%, and sometimes even more. In copper mining, the NaSH can be added mainly in two process points: in theentrance to the wenco (pre-rougher) and in the cleaning.

ACTIVATED CARBON

Alcarbon® - Activated Carbons for the  recovery of Gold. There are several gold processing operations requiring activated carbons:

  • CIP (Carbon in Pulp): gold pulp is mixed with sodium cyanide, then is contacted with activated carbon in a series of large agitated adsorption tanks.
  •  CIL (Carbon in Leach): similar to CIP but leaching and adsorption occur simultaneously.
  •  CIC (Carbon in Column) for Heap leaching: dilute cyanide solution percolate over a heap of crushed ores and is then pumped through activated carbon columns.

 

A big thank you to those who paid us a visit at our stand at the Flotation 15 Conference!

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