The application discloses a kind of special
sulfur-based compound
fertilizer of leaf vegetable, preparation method and device, belong to compound
fertilizer preparation technical field.The preparation of the compound
fertilizer includes the following steps:
sulfur,
anhydrous ethanol are mixed and stirred, constant temperature oscillation, stand until clear state, take supernatant and mix with
distilled water, oscillation, add
sodium dodecyl sulfate, oscillation, add
coating agent, oscillation, obtain material B, stand by;
Ammonia is introduced into
phosphoric acid to adjust to pH 4.3-4.8, filter pressing, collect filtrate to obtain feed liquid D;Material B is filtered, and the filter residue is collected and mixed with feed liquid D,
guar gum and
locust bean gum are added, oscillation is carried out, a mixed
slurry is obtained,
granulation is carried out,
drying is carried out, screening is carried out, and cooling is carried out, to obtain the compound fertilizer, improve the
sulfur and
phosphorus ammonium slurry combination degree, avoid the loss of fertilizer efficiency, prevent the occurrence of safety hazards.