The principle of alluvial gold mining beneficiation is to maximize the recovery rate of gold and the associated heavy minerals from gangues first and then separate gold from the associated heavy minerals by joint mining solutions such as gravity separation, flotation, amalgamation, magnetic separation, and electrostatic separation.
Many alluvial gold ores contain cementing mud pie and most of its particle size is over 100 mm, which will be excluded together with the waste rock in the process of screening if not being crushed, thus is a loss of gold and trommel are the commonly used screening equipment, which has long service life and high processing capacity.
Material less than 0.1mm almost does not contain gold in alluvial gold ore, which is known as floating gold and is difficult to be recovered in the separating process. Moreover, the gold and sludge will be confused in the separating process, particularly in the mechanical separating process. Therefore, in the alluvial gold mining process, this kind of sludge mainly be eliminated. Popular Desliming equipment is an off-the-mud bucket.
Practice has proved that gravity separation is the most effective and economical alluvial gold processing method. Due to the different sizes distributed among alluvial gold, different alluvial gold processing equipment has various effective size limitations, so a reasonable alluvial gold separating process should apply the several gravity separators to jointly operate.
This process characterized by the simple process, lower cost in equipment, easy operation, What is more, the mining process is environmental protection, the tailings can be directly discharged, which greatly reduces the overall processing plant cost in civil engineering.