Various

4 Best Paint Strippers We Tested

Header Best paint stripper

Disclosure: This post contains affiliate links and I may earn a small commission if you purchase through these links. In the days before the invention of the modern chemical paint stripper, you would need to use a heat gun or sander to remove paint, which could take many hours of hard work. Paint-stripping chemicals make … Read more

4 Best Glues for Ceramics [We Tested]

Disclosure: This post contains affiliate links and I may earn a small commission if you purchase through these links. Update: October 2023 – I updated the list with details of our in-house ceramic glue test and added Aleenes glue after it performed well. Ceramic objects are delicate and beautiful and often hold significant sentimental value. … Read more

5 Best Pressure Washer Surface Cleaners

Disclosure: This post contains affiliate links and I may earn a small commission if you purchase through these links. A pressure washer surface cleaner is a fantastic tool to help you efficiently clean various surfaces, including concrete, decks, and even cars. Using a pressure washer surface cleaner can save you time and energy compared to … Read more

14 Best Jeweler Loupes [Evaluated in 2023]

shutterstock 1810054855

Disclosure: This post contains affiliate links and I may earn a small commission if you purchase through these links. We all have treasured possessions that, now and then, deserve our undivided attention. Part and parcel of being a collector requires us to have an intimate knowledge of our beloved valuables, and often the only way … 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

Bioleaching Test Procedure

Pulps of 20% solids is prepared from -200 mesh pyrite concentrate (after froth flotation), and is inoculated with 5% (V/V) of adapted bacterial solution. The bioleaching tests is carried out in 250 ml Erlenmayer flasks, each contained about 220 ml pulp. The pulps is aerated with air bubbling at one liter per minute air flow … Read more

Heap Leaching in Cold Weather & Winter

Extended freezing conditions exist in many parts of the world in the winter because of latitude or high altitude or both. Such conditions, coupled with the sprinkling techniques commonly used in heap leaching, result in formation of layers of ice which inhibit leaching by tying up solution inventory on heap surfaces and shutting off solution … Read more

Heap Leach Feed Preparation

Some gold and silver ores are difficult to successfully heap leach because of the high percentage of clay, and/or fines which are intrinsic in the material or generated by the crushing or ore preparation. This type of ore can result in extremely slow percolation during heap leaching. Channeling can result which promotes dry areas within … Read more

Heap Leaching at Altitude

It is feasible to conduct cyanide heap leaching at high altitudes as has been demonstrated by a number of pilot and commercial operations in the altiplano of the Andes Mountains. Operations at elevations in excess of 3000 meters (9800 ft) must be conducted with care to insure that heaps are fully permeable and the lixiviant … Read more

Heap Leaching with Sea Water

There are locations on the west coast of South America, in Australia, and in the California internal desert where fresh water is practically unavailable. It has been found that precious metal dissolution can be accomplished in sea water or in strong brine provided the leaching environment is adjusted to compensate for the buffering characteristics of … Read more