How to Use the mercury in gold mining processing.
Mercury is an important material in catching the gold from the vein gold or placer gold. And mercury plate is the key device to apply the mercury method. This essay will teach the small miners how to use mercury and mercury plate.
(1) Apply mercury, commonly known as "mercury", put an appropriate amount of mercury in the vial, pierce 4-5 small eyes on the lid of the vial, and sprinkle mercury on the surface of the mercury plate, then push it away with a rag, and apply it evenly. Watery, it means mercury saturation (Note: the first time the mercury plate is used, the correct order should be that the mercury on the surface A is used for 3 days without scraping the amalgam, and the mercury on the surface B is used for 3 days without scraping the amalgam, and then start Normal use of side A can improve the efficiency of gold collection and prolong the service life of the mercury plate).
(2) The amount of mercury. The amount of mercury added should be appropriate. Too high a dosage will reduce the consistency and elasticity of the amalgam and easily cause the loss of the amalgam and mercury; if the amount is insufficient, the amalgam will become hard and reduce its ability to catch gold. The first coating amount of mercury on the mercury plate is 15-30g/m. , Every 6-12h, or every shift, the added mercury is generally 2 to 5 times the gold content of the ore. One ton of ore consumes 2-9g of mercury. When processing arsenic and antimony-containing ores, the mercury consumption can reach 10-15g. In short, the amount of mercury used and the length of the replenishment interval depend on the amount of mercury that should be maintained during the amalgamation operation to ensure that gold particles can be captured by mercury anywhere on the mercury plate.
(3) Scrape the amalgam. Usually the time for scraping amalgam is the same as the time for adding mercury. When scraping the amalgam paste, stop feeding the mine first, rinse the mercury plate clean, use a hard rubber plate to start from one end of the mercury plate and gradually scrape it toward the other end. It is not necessary to scrape the amalgam too thoroughly. Practice has proved that leaving a thin layer of amalgam on the amalgam plate is beneficial to amalgamation and can also prevent the amalgam plate from getting sick.