The so-called mercury plate "sickness" refers to the ability of the mercury plate to reduce gold , or even completely lose the ability to capture gold. This phenomenon should be avoided as much as possible in production. The symptoms and preventive measures of "sickness" of mercury plate are as follows: Angular Contact Ball Bearing,Angular-Contact Articulated Bearing Ring,Angular Contact Bearing,Double Row Angular Contact Bearing Xinchang Newsun Xintianlong Precision Bearing Manufacturing Co.,Ltd , https://www.xtlbearing.com
The mercury plate is dry and the mercury paste is hard. This is often caused by insufficient mercury supplementation. Frequent inspection of the mercury plate can be avoided by adding an appropriate amount of mercury in time.
When mercury is used in recovered mercury, micronization of mercury sometimes occurs. At this time, the mercury cannot be spread evenly on the mercury plate and is easily taken away by the slurry. In the middle of each fine particle, there is a film of oxide oil and other substances, so that the separated mercury particles can no longer be connected. Therefore, when using recycled mercury, the state of mercury should be checked beforehand. If it is found to be micronized, it is not used. Sodium amalgam to prevent such pathological have a role, particularly effective for arsenic-containing minerals.
The action of sulfur or sulfide and mercury causes the mercury to be pulverized, and black spots are formed on the mercury plate, which makes the mercury plate lose the ability to capture gold. If the sulfide ore containing arsenic, antimony, bismuth, this phenomenon is particularly serious. The addition of lead ions to arsenic-containing pulp prevents pathological conditions. It is also possible to increase the amount of lime, increase the pH of the slurry, inhibit the activity of the sulfide, increase the amount of mercury added, and increase the flow rate of the slurry.
When the ore is mostly gold sulfide ore, it often happens that the polymetallic sulfide adheres to the mercury plate, which deteriorates the amalgamation process. To deal with this situation, it is often to increase the amount of lime and increase the pH of the slurry.
Mixing the oil into the slurry will also worsen the amalgamation process. Therefore, in mining and crushing grinding, the ore should be prevented from mixing with grease. When conditions permit, it is best to use a hydrocarbon oil that does not contain vegetable oil. This oil is not harmful to the amalgamation operation. When the fatty acid-containing oil cannot be removed from the slurry, lime can be added to reduce its effect. Lime should be added as far as possible from the mercury plate to allow for sufficient reaction time.