Return to the taxi and press the red button to return to the space station. Click on the Moon Shuttle red door and solve the concentration puzzle to enter it. Click on the display of the moon on the console. You arrive in the docking area and there is a train awaiting you. Click on the front of the train to make it go.
Next stop is ore processing station.
You've left the train and are looking at it. Turn right and click straight ahead to make train go to next stop. Next stop is a turntable. Using a clock analogy, you enter at 6 o'clock. The recycling center is the door at 9 o'clock.