Iron oxide is one of the common impurities in quartz sand, and its existence will affect the quality and use of quartz sand. The following are several common methods for removing ferric oxide from quartz sand:
Magnetic separation method: magnetic separation method is a method of separating ferric oxide in quartz sand by magnetic force. The magnetic separator is used to separate the Fe2O3 in quartz sand magnetically, so as to achieve the purpose of removing Fe2O3.
Wet iron removal method: wet iron removal method is a method that immerses quartz sand in aqueous solution containing chemical iron removal agent, and then removes ferric oxide through filtration, precipitation and other processes.
Heavy medium separation method: heavy medium separation method is a method to separate ferric oxide from quartz sand through different medium densities. Immerse quartz sand in heavy medium solution to separate ferric oxide from heavy medium, and then remove ferric oxide through separation equipment.
Bioextraction: Bioextraction is a method of decomposing and removing ferric oxide in quartz sand by microorganisms. By cultivating suitable microorganisms, iron oxide can be decomposed into soluble ions, which can then be removed through processes such as washing and filtration.
To sum up, the methods of removing ferric oxide from quartz sand mainly include magnetic separation, wet iron removal, heavy medium separation and biological extraction. The specific method shall be comprehensively considered according to the quality requirements, process requirements, economic benefits and other factors of quartz sand.
