Abstract: The present invention provides a turbulent flow fly ash flotation process and flotation device. The process of the present invention comprises the following steps: 1) adding a flotation agent and/or a collecting agent to fly ash raw material to form a mixture; 2) in the flotation device, allowing the mixture obtained from step 1) to fall from the upper part of the flotation device; 3) forming upwardly blowing gas in the flotation device, the gas having countercurrent contacts with the falling mixture of step 2), and in the process of the upward movement of the gas, the gas being in a turbulent state; 4) collecting particles which are formed by the upward movement of the gas in step 3) and which pass through the flotation plate of the flotation device. In the present invention, the gas for blowing bubbles and particles upward is in a turbulent state to provide improved flotation effect and higher flotation rate.

Abstract: The present invention provides a system and a process for preparing activated carbon from fly ash. The system of the present invention comprises a flotation system and a carbonization system. The present invention has the following advantages. Firstly, since a fuel gas-flue gas loop structure is arranged, the combustible fuel gas produced in carbonization process enters the combustion means for combustion via this loop structure, and also via this loop structure, the high temperature flue gas generated by the combustion enters the carbonization furnace to heat up and carbonize the charcoal powder raw material within the carbonization furnace. Such a solution not only saves energy, but also prevents a substantial amount of combustible gas from being emitted to the atmosphere, thereby reducing environmental pollution. Secondly, since two cylinders are arranged in the carbonization furnace, the charcoal powder raw material in the inner cylinder enters the outer cylinder and then exits from the outer cylinder.