<p>This type of <a href="https://www.prominetech.com/gold-processing/">gold processing plant</a> separation technique works very similar to mill extraction but is much more cost effective; the drawback is it is harder to control what happens to the toxic cyanide solution after it has done its job. It also has the advantage of adding oxygen to the mix naturally. It is most often used on the very lowest grade of ore or to reprocess ore that is a byproduct of the other extraction steps.</p>
<p>The Cyanide Leaching Process has been the most widely used and most cost effective method of extracting gold from ore since the 1970’s. Most open-pit <a href="https://www.prominetech.com/gold-processing/">Rare Earth Minerals Processing Plant</a> operations around the world use a heap leaching to extract ores from these types of deposits. Consider that most of the largest gold mines in the world are mining what would be considered low-grade ore by most standards. It would be impossible to profitably work most of these ores without use of cyanide.</p>
<p>Many commercial mining operations have found it profitable to rework old mine tailings from last century. Significant gold was left behind in these tailings due to ineffective mining methods during the early days, but they can be reworked profitably now.</p>
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