What is golden cyanidation?
Gold cyanidation, also called cyanide leaching, is a process used to extract gold from raw ore taken from the ground. It uses cyanide to dissolve gold inside the rock that itself is not soluble in cyanide. Gold is then drawn in a liquid form that can be treated to remove cyanide. Almost 90% of all gold extracted commercially are performed by cyanid. This process has been controversial since its foundation due to the poisonous nature of cyanide and the threat represented by the environment and people working in extraction facilities.
The cyanidation process begins after gold was discovered and the raw ore was separated from the ground, often by explosive means. The ore is distributed to better facilitate the leaching process. The division of ore into finer pieces is called leaching heap. The processing of ore immediately without crushing is known as leaching of the landfill. However, each process uses cyanide to remove gold from ore.
depending on what other metals are presentNY in Ruda, preliminary processes may be necessary to ensure productive and effective extraction. One such process is washing ore or immersion of ore in water with high pH, known as an alkaline solution. The lime -alkaline oxide oxide solution is often used to neutralize potential acids, then the solution is flooded with air or aerated. These methods reduce the extent in which iron and sulphide commonly occurring in Ruda interact with cyanide. The use of ancestors of calcium oxide helps to ensure that no hydrogen cyanogen, a highly toxic form of cyanide is released during the process.
The gold cyanidation process is usually performed in an outdoor environment, although indoor devices that meet safety regulations are sometimes used. Cyanide salt, such as potassium cyanide, sodium cyanide or calcium cyanide, the most popular choice, is a mixed with water and then applied to ore. This part of the process is completed when most of the gold has destroyed and has been removed.
The time required for almost complete gold cyanidation ranges from only 10 hours to 44 hours and depends on the size of the gold particles present in the Ruda. The more oxygen is present at the time of cyanidation, the less time the process will take. When gold is sufficiently dissolved, one of two methods is restored. It can be adsorbed to large carbon particles that are filtered from ore. In the Merrill-Crowe clotting process, oxygen is removed from the solution, which is then infunded with a zinc powder and passes through the filter.
Environmental risks in using gold cyanidation are numerous, especially because the process often takes place outdoors. If the right security measures are not taken, they may have serious consequences for workers and surrounding ecosystems. Alphabets are carried out measures to ensure that no cyanocca cyanide is developed, other forms of cyanide still pose a danger to exposed organisms. During cyanidation, harmful chemicals, including nitrates and thiocyanates, are formed, although herCH impact is much less extensive than the leakage of cyanide. Gold mining companies must be followed by strict security measures to prevent such an event.