Production of positive active material of lithium battery

[0017] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0018] The selected pyrite in the present embodiment will pass through crushing and sieving, 75% will pass through 200 mesh sieve (particle size is not more than 0.076mm), and 25% will pass through 325 mesh sieve (particle size is not more than 0.044mm). The purity is 99.44%, the sulfur content is 53.15%, and the iron content is 46.50%. Its impurity content is SiO 2 content is less than 0.1, MgO content is not more than 0.1%, Al 2 o 3 The content of CaO is less than 0.15%, the content of CaO is not more than 0.1%, and the content of acid-soluble iron is 0.38%.

[0019] The heat treatment method adopts a dynamic treatment method, that is, the pyrite is put into a rotary furnace for heat treatment.

[0020] The internal heating type rotary furnace is used to heat the pyrite alternately in dynamic and static state under certain rotation co...