A kind of granulation method of nitrophosphate fertilizer
A nitrophosphate fertilizer and granulation technology, applied in the form of fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of high moisture in the product, poor appearance of nitrophosphate fertilizer, etc., and achieve easy installation and maintenance, not easy to agglomerate, and low moisture content Effect
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Embodiment 1
[0031] Such as figure 1 As shown, in the first step, the acid solution 3 is produced by reacting the industrial nitric acid solution 2 and the flotation phosphate rock 1 in a weight ratio of 2.2:1 with a mass percentage of 50%; in the second step, the acid solution is passed through a vortex machine , washing drum and plate and frame filter press 4 filter the insoluble matter 5 after the reaction; the third step, the filtered clear liquid 6 is crystallized by freezing and crystallizing to separate out calcium nitrate tetrahydrate 9 crystals; the fourth step is to remove the The crystallized calcium nitrate tetrahydrate 9; the fifth step, the neutralization reaction of the ammonia gas 11 and the filtered calcium nitrate clear liquid 10; the sixth step, the neutralized slurry 12 is concentrated by the evaporator 13 to obtain the mass percentage It is 92% nitrophosphate fertilizer concentrated solution 14; in the seventh step, the nitrophosphate fertilizer concentrated solution 1...
Embodiment 2
[0034] Such as figure 2 As shown, in the first step, react with 50% industrial nitric acid solution 2 and flotation phosphate rock 1 in a weight ratio of 2.2:1 with the mass percentage to prepare acid solution 3, and in the second step, the acid solution is passed through a vortex Screw machine, washing drum and plate-and-frame filter press 4 filter the insoluble matter 5 after the reaction; in the third step, the clear liquid 6 after filtration is crystallized by freezing and crystallizing to separate out calcium nitrate tetrahydrate 9 crystals; in the fourth step, through the CN filter 8 Deeply remove the calcium nitrate tetrahydrate 9 that crystallizes out; The 5th step, carry out neutralization reaction with the clear liquid 10 after logical ammonia gas 11 and filter calcium nitrate; Obtaining the nitrophosphate fertilizer concentrated solution 14 of 92% by mass percentage, the seventh step, the nitrophosphate fertilizer concentrated solution 14 makes the solid particle 1...
Embodiment 3
[0037] Such as image 3As shown, in the first step, the industrial nitric acid 2 and the flotation phosphate rock 1 are reacted in a weight ratio of 2.2:1 with a mass percentage of 50%, to prepare the acid solution 3, and in the second step, the acid solution 3 passes through the vortex machine, washing drum and plate and frame filter press 4 to filter the insoluble matter 5 after the reaction; in the third step, the filtered clear liquid 6 is crystallized by freezing and crystallizing to separate out calcium nitrate tetrahydrate 9 crystals; Remove the calcium nitrate tetrahydrate 9 that crystallizes out; The 5th step, logical ammonia gas 11 and the clear liquid 10 after filtering carry out neutralization reaction; 92% nitrophosphate fertilizer concentrated solution 14; in the seventh step, the nitrophosphate fertilizer concentrated solution 14 passes through a biaxial granulator 22 to obtain solid particles of 0.5 to 5.2 mm; in the eighth step, the solid particles pass throug...
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