Method for recycling germanium from germanium coal mine through pressurized oxygen leaching and co-producing high-quality coal through flotation of leaching residues

The invention discloses a method for recycling germanium from a germanium coal mine through pressurized oxygen leaching and co-producing high-quality coal through flotation of leaching residues, and belongs to the technical field of comprehensive utilization of coal. The method comprises the steps that the germanium coal mine, a leaching agent and water are mixed according to a certain liquid-solid ratio; a mixture is put into a high-pressure kettle reactor, the temperature is risen, and oxygen is introduced for leaching; reacting is carried out at constant temperature for a period of time, then a leached product is taken out, and is put into a reaction kettle, polyacrylamide is added into the leached product to be stirred and mixed uniformly, standing is carried out, and then supernate is taken out to obtain primary washing residues; Polyacrylamide and water are added into the primary washing residues to be stirred and mixed uniformly, standing is carried out, and then supernate is taken out; and polyacrylam