Heavy Liquid Testing Procedure

Dense Heavy Media Separation Test

The general procedure is as follows. The sample is placed in the liquid of lowest specific gravity and is split into two fractions. The float fraction is set aside to be weighed and assayed. The sinks fraction is washed in a suitable solvent, dried and placed in the liquid of a higher specific gravity. This … Read more

Froth Flotation Process

flotation separators

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. For this purpose we use chemicals/reagents: Frothers (MIBC) is what allows the formation of air bubbles. Think … Read more

Precious Metals – World’s Top 10

800px Indium wire

Ever wondered why people keep their gold pieces in safes? And why your family silverware is always so well protected? Well, that’s obviously because gold and silver are two precious metals. That you already know… But what about other metals? There are other substances equally precious, even more, precious than gold, that you must get to … Read more

Portable XRF Analyzer & Price List

XRF Radiation

See many used XRF Analyzer Models and their prices.  Here I list the price of a Portable XRF Analyzer (AKA handheld XRF spectrometer) depends on functionality and Brand.  Used models can save you as much as 70% over new ones. REVIEW XRF TECHNICAL SPECIFICATIONS BY BRAND: Olympus/Bruker/Niton/Oxford/Spectro Visit our XRF Discussion Forum Olympus offers a variety of … Read more

Where to Find Gold

So tonight’s topic of interest is kind of near and dear to me, I’m going to start with the first slide; Rocks and Gold Clues. What rocks tell you about where to find gold, there are clues that they give and those are very important if you’re going to find gold and that’s what we’re … Read more

Spent Alumina Regeneration

Regeneration of the spent alumina was accomplished by using 0.25% NaOH and 0.5% NaOH. Figure 11 shows the release of selenium, silica, and aluminum when regenerating the adsorption columns that had received the mine leachate. In this case, the regeneration was performed in an upflow mode using 30% bed expansion. As expected, the losses of … Read more

Kaolin Ceramics

Kaolin is a clay comprised essentially of the mineral kaolinite which has the oxide composition of 46.3% SiO2, 39.8% Al2O3, and 13.9% combined H2O. The structural formula of kaolinite is (OH)8Si4Al4O10. These deposits are sedimentary and contain approximately 90% or more kaolinite along with minor quantities of quartz, mica, and smectite along with trace quantities … Read more

How to Derate a Pump Curve for Slurry Pumping

The pump curves published by pump manufacturers are for the performance of the pump on water. Some pump manufacturers use a derating factor to correct the head and efficiency of the pump when pumping slurry. This a subject which has had a lot of controversy and disagreement It is suggested that the method used be … Read more

Silver Chloride Chemistry

To appreciate the development of industrial silver chloride processing it is helpful to outline some of its general properties. Since more comprehensive reviews are available, only basic concepts will be covered here. Silver chloride is a white, curdy, crystalline solid compound. In the lab, it is prepared from a solution of AgNO3 by precipitation with … Read more

Effect of Air Flowrate on Flotation Column

On a flotation column cell, the variation of concentrate flowrate, clean coal yield and product grade with air flow rate are shown in Figure 4. These tests were carried out using a 5 wt. % feed slurry. The results show that the concentrate flow rate, yield and product ash content increased with air flow rate. … Read more