不同APP添加量对复合肥料造粒性能的影响

doi:10.19964/j.issn.1006-4990.2023-0501

Abstract

Abstract:

Ammonium polyphosphate（APP），as a new type of fertilizer that has attracted much attention in recent years，has been studied more in agricultural applications with remarkable effects，but less research has been reported as a raw material in the production of compound fertilizers.In order to investigate the compounding and granulation performance of APP with other fertilizers，the APP，monoammonium phosphate（MAP），diammonium phosphate（DAP） and other raw materials were used to prepare compound fertilizers by compounding and then granulation.Two schemes were designed for the preparation of fertilizers，in which Scheme I was based on APP，MAP，urea and K₂SO₄ as raw materials，and Scheme II was based on APP，DAP，urea and K₂SO₄ as raw materials，and the two schemes were set with different APP additions as variables，and the compositions of the raw materials，the phenomenon of the granulation process，the amount of water added，the rate of granulation，the pH of the fertilizer，the strength of the particles，particle dispersion，and the moisture absorption of the fertilizer，etc.，were investigated.Fertilizer hygroscopicity and other granulation properties were evaluated.The results showed that APP compounded with other raw materials and then granulated could prepare granular products of 2~4.75 mm.The compounding performance was good when the proportion of polymerized phosphorus was ≥40%.Different phosphorus sources had obvious effects on the granulation performance of composite fertilizers，and the granulation rate，particle strength and dispersibility of the products of Scheme II were better than that of Scheme I，but the hygroscopicity of Scheme II was stronger.The appropriate addition amount of APP was conducive to the granulation of composite fertilizers.Both schemes showed that the granulation performance of APP was better than that of Scheme I，but the moisture absorption of Scheme II was more serious than that of Scheme I.The appropriate amount of APP addition is conducive to the granulation of compound fertilizer，and both schemes showed that when the proportion of polymerized phosphorus was 20%~40%，the granulation rate of fertilizer products was higher，with Scheme I＞67% and Scheme II＞77%.

Key words: ammonium polyphosphate, polyphosphorus, granulation performance, compound fertilizer, particulate processes

CLC Number:

TQ444.5

ZHAO Leilei, SHU Yizhou, QI Zenglian, LIU Dandan, KUANG Jialing, HUANG Chengdong, WU Jiaxiang, PU Zhengxian. Effect of different addition amount of ammonium polyphosphate on granulation performance of compound fertilizer[J]. Inorganic Chemicals Industry, 2024, 56(8): 74-82.

Figures/Tables 10

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方案	聚合磷质量分数/%	原料质量分数/%
方案	聚合磷质量分数/%	APP	MAP	DAP	尿素	K₂SO₄	硼砂	七水硫酸锌
I	0	0.00	21.41	—	54.37	21.00	3.00	0.22
	20	7.05	15.38	—	53.35	21.00	3.00	0.22
	40	14.25	9.29	—	52.24	21.00	3.00	0.22
	60	21.61	3.20	—	50.97	21.00	3.00	0.22
	70	25.16	0.00	—	50.62	21.00	3.00	0.22
II	0	0.00	—	23.96	51.82	21.00	3.00	0.22
	20	6.98	—	17.40	51.40	21.00	3.00	0.22
	40	14.04	—	10.54	51.20	21.00	3.00	0.22
	60	21.16	—	3.72	50.90	21.00	3.00	0.22
	70	25.16	—	0.00	50.62	21.00	3.00	0.22

方案	w（聚合磷）/ %	原料复配性能		造粒成粒性能
		pH	混配过程现象	造粒过程现象	干燥后不同粒径物料的质量分数/%
		pH	混配过程现象	造粒过程现象	＜2 mm	2~4.75 mm	＞4.75 mm
I	0	3.81	存在严重结块现象	易成大颗粒，颗粒粘连	9.88	73.06	17.06
	20	5.65	存在轻微结块现象	易成粒，物料潮湿，颗粒分散	15.03	69.17	15.80
	40	6.11	混合均匀，复配良好	易成粒，颗粒分散	19.98	67.63	12.39
	60	6.44	混合均匀，复配良好	较易成粒，小颗粒较多	22.80	66.80	10.40
	70	6.82	混合均匀，复配良好	物料干燥，较难成粒	26.86	66.27	6.87
II	0	7.13	有吸湿，但未结块	易成大颗粒，颗粒粘连	9.82	79.83	10.35
	20	7.08	存在轻微结块现象	易成粒，物料潮湿，颗粒分散	14.14	77.38	8.48
	40	7.07	混合均匀，复配良好	易成粒，颗粒分散	16.25	76.30	7.45
	60	7.08	混合均匀，复配良好	较易成粒，小颗粒较多	23.01	69.57	7.42
	70	6.82	混合均匀，复配良好	物料干燥，较难成粒	26.68	66.80	6.52

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Effect of different addition amount of ammonium polyphosphate on granulation performance of compound fertilizer

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