Calcining technology and calcining device for producing high-brightness and low-hardness talc by utilizing black talc

Disclosed are a calcining technology and a calcining device for producing high-brightness and low-hardness talc by utilizing black talc. The calcining technology comprises the following steps: smashing and milling to enable grain fineness of a black talc raw material to be 150 to 8000 meshes; feeding the milled black talc raw material into the calcining device for calcining, wherein calcining temperature is 200 to 850 DEG C, and calcining time is 2 to 8h; and introducing high-concentration and high-pressure oxygen in a calcining process to form an oxidizing atmosphere, wherein oxygen concentration is 30 to 80 percent, and oxygen pressure is 0.05 to 0.7 MPa. The calcining device comprises a feeding mechanism, a rotary kiln and a discharging mechanism; a rotary cylinder of the rotary kiln is horizontally arranged rotatably, and comprises a feeding section, a heating section and a discharging section; the feeding section and the feeding mechanism are connected, and the discharging section and the discharging mec