What is the process time of the flotation machine in the gold selection field？

The process time of a flotation machine in the gold selection field can vary depending on various factors such as the characteristics of the ore, the desired grade of the concentrate, the type of flotation machine, and the operating conditions. 

Generally, the flotation process takes several minutes to half an hour. However, it is not uncommon for the process to take several hours to achieve the desired separation efficiency. The process may also involve multiple stages of flotation with intermediate or final concentrate regrinding, which can further extend the process time.