Alkali supplement process and equipment for producing alumina through combined method

The invention discloses an alkali supplement process and alkali supplement equipment for producing alumina through a combined method. The process comprises that: alkaline red mud is automatically extruded from an alkaline red mud storage tank (6) and enters a stirring alkalinized tank (3) through an alkaline red mud alkalinizing pipe (7); alkaline powder enters the stirring alkalinized tank (3) through an artificial unpacked alkalinized working platform (1) and an alkaline powder chute (2) to be stirred and dissolved with the red mud together, and returns to the alkaline red mud storage tank (6) from a cycle alkalinizing pump (4) through a circulating pipe (5) for uniform mixing; and an alkaline red mud delivery pump (8) delivers the mixture to an alkaline red mud storage tank (9) for preparing raw slurry. The equipment comprises that: the cycle alkalinizing pump (4) is connected with the alkaline red mud storage tank (6) through the circulating pipe (5); the alkaline red mud alkalinizing pipe (7) is arranged