Ferrous sulfate, magnesium iron both a fertilizer, but also a magnesium fertilizer, widely used, significant fertilizer, considerable benefits.
The production method comprises the following steps: crushing the rhododendron containing MgO≥80% to a fineness of ≥200 mesh, and then adding 95% of the rhododendron powder to the quantitative waste acid, and stirring with compressed air, the following reaction :
MgO+H 2 SO 4 === MgSO 4 +H 2 O
The reaction is an exothermic reaction, the liquid temperature can reach 90~98 ° C, and after stirring for half an hour, it is separated by pressure filtration, the filter residue is discarded after washing with water, the filtrate is concentrated, and when concentrated to a relative density of 1.5 to 1.54, it is placed. The material is allowed to cool naturally and crystallize, and a pale green crystal is obtained. The next day, the discharge is dried by a centrifuge, the mother liquid is returned to the reaction tank for reuse, and the filter cake is packaged to obtain a finished product of magnesium ferrous sulfate (multi-salt).
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