The object of the invention is a method, to manufacture a
manganese sulphate component from the black
mass material (11) of used alkalin batteries (11'). The method comprises a first
acid dissolution (201) carried out on the black
mass material in the presence of water (12) and sulphuric acid (13) to dissolve
zinc (20),
potassium (30) and
chlorine (35) from the black
mass material into a
zinc sulphate component (16); a first
filtration (202) to separate the
zinc sulphate component from a
manganese component (15) remaining from the first
acid dissolution; a second,
acid dissolution (301) carried out on the
manganese component in the presence of purified, water ( 12'), sulphuric acid and at least one
reducing agent (14) to form a suspension (41) from the manganese component; a second
filtration (302) to remove an insoluble
solid, matter (26), such as, for example,
graphite (27),
carbon black (28) and plastic (29), from the suspension to form a process solution (17); a sulphide
precipitation (105, 303) and at least one subsequent separation step (106, 304) to remove zinc (46) and
copper (21) from the process solution formed, after which the
manganese sulphate component (24) formed is suitable for use as a fertiliser (24.1) or as a fertiliser component in
agriculture, or as an industrial
raw material ( 24.2). In addition, the object of the invention is also an apparatus for manufacturing manganese and zinc sulphate components, a sulphate component combination and uses.