The recovery rate of gold in wet mercury depends on the shape of natural gold particle size, the color of gold particles, the quality of mercury, the temperature of amalgamation, slurry concentration, amalgamation method and equipment factors.

The shape of gold particle size and monomer dissociation degree is mainly related to the crushing and grinding operation, especially the monomer dissociation degree has a greater impact, appropriate increase in grinding fineness can improve the recovery rate of amalgamation operation, suitable for amalgamation of gold particles is generally 0.2 ~ 0.3 mm, the lower limit of amalgamation plate particle size in the grinding cycle of 0.015 mm, but fine gold particles with the loss of slurry.

The color of the ore gold is higher than the vein gold, the color in the oxidized zone is higher than the gold in the primary ore, the gold with high color is easy to amalgamate, and the amalgamation ability of the gold grains whose surfaces are contaminated will be greatly reduced. Amalgamation is divided into internal amalgamation and external amalgamation, external amalgamation is the process of amalgamating gold outside the crushing and grinding process, external amalgamation is commonly used in the domestic fixed amalgamation plate and vibration amalgamation plate, etc. Internal amalgamation is the amalgamation of gold in the crushing and milling operation cycle, South Africa and the United States of America's gold mines are often used for internal amalgamation within the mucking machine, the small and medium-sized gold mines in the former Soviet Union are often used in the rolling mill, and often used in the domestic amalgamation cylinder. Internal amalgamation is more efficient than external amalgamation, and the quality of mercury and gold is good. External amalgamation slurry concentration should not be too large, in order to form a loose thin slurry flow, the flow rate should not be too high, so that the gold particles down t