Compound fertilizer containing rare earth double salt and preparation method thereof
A compound fertilizer and rare earth technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of low ammonium salt concentration, economic and technical difficulties in recycling, and complex components, so as to control environmental pollution, facilitate reproductive growth, The effect of increasing chlorophyll content
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Embodiment 1
[0020] Take 200ml of waste water containing 0.4mol / L ammonium sulfate, add 200ml of lanthanum sulfate solution containing 0.3mol / L REO, heat the reaction system to 60°C, adjust the pH value of the system to 4, continue stirring for 30 minutes, separate the solid and liquid, and the solid phase is ready for la 2 (SO 4 ) 3 ·(NH 4 ) 2 SO 4 2H 2 O.
[0021] The following raw materials were obtained after crushing: La 2 (SO 4 ) 3 ·(NH 4 ) 2 SO 4 2H 2 O 29.4g, monoammonium phosphate 68.7g and vermiculite and medical stone 1.9g, mix evenly, obtain the compound fertilizer containing rare earth compound salt after the disc granulation process of compound fertilizer is granulated, and the N in the product The content is 7wt%, P 2 o 5 The content is 33wt%, and the REO content is 10.0wt%.
Embodiment 2
[0023] Take 1000ml of waste water containing 0.1mol / L ammonium sulfate, add 500ml of lanthanum cerium chloride waste liquid containing 0.2mol / L REO, the temperature of the reaction system is 10°C, the pH value of the system is adjusted to 3.5, continuous stirring for 100 minutes, solid-liquid separation , the solid phase is (LaCe) 2 (SO 4 ) 3 ·(NH 4 ) 2 SO 4 2H 2 O.
[0024] The following raw materials were obtained after crushing: (LaCe) 2 (SO 4 ) 3 ·(NH 4 ) 2 SO 4 2H 2 O 0.3kg, 979.2kg of monoammonium phosphate and 20.5kg of vermiculite and medical stone, mix evenly, press the extrusion granulation process of compound fertilizer to obtain the compound fertilizer containing rare earth compound salt after granulation, the N in the product Content is 10wt%, P 2 o 5 The content of REO is 47wt%, and the content of REO is 0.01wt%.
Embodiment 3
[0026] Get 200ml of industrial wastewater containing 0.15mol / L carbonate and 0.1mol / L potassium ions, add 200ml of mixed rare earth chlorides (comprising lanthanum, cerium, praseodymium and neodymium) containing 0.1mol / LREO, and heat the reaction system to 90°C. Adjust the pH value of the system to 4.5, stir continuously for 45 minutes, separate the solid and liquid, and the solid phase is RE 2 (CO 3 ) 3 ·K 2 CO 3 2H 2 O.
[0027] The following raw materials are taken after comminution: RE 2 (CO 3 ) 3 ·K 2 CO 3 2H 2 O 1.3kg, potassium dihydrogen phosphate 987.5kg and zeolite powder, diatomaceous earth and montmorillonite 11.2kg, mix evenly, press the disc granulation process of compound fertilizer to obtain the compound compound containing rare earth compound salt after granulation Fertilizer, P in the product 2 o 5Content is 51wt%, K 2 The O content was 35 wt%, and the REO content was 0.06 wt%.
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