Abstract: <SPAN lang=EN-US>By adopting new techniques,such as continuous vertical kiln carbon-reduction roasting,air isolation cooling,and heat recycling,high-quality manganese sulfate has been produced through the following procedures of grinding,acid-leaching,impurity removing,solid/liquid separation,purification,concentration,and drying etc..Moreover,many good effects,such as high-effective utilization of resources,energy consumption reduction,labor strength decline,production quality improvement,and environment protection have been realized at the same time.Target that the comprehensive utilization rate of low-grade pyrolusite (MnO</SPAN><SPAN lang=EN-US><SUB>2</SUB> mass fraction less than 25%) powder reaches more than 90% was also met.Especially,it has found a new way for high-effectively utilizing low-grade pyrolusite.Many technical problems in the existing manganese sulfate production methods,such as other kiln roasting methods and two-mine acid leaching method,all have been solved.<BR></SPAN>