利用黄磷渣改性制备云贵川地区水稻专用肥

doi:10.19964/j.issn.1006-4990.2022-0593

Abstract

Abstract:

Yellow phosphorus slag is a by-product of yellow phosphorus production by electric furnace，and its annual emissions is amount to millions of tons.Its main components are CaO and SiO₂.Aiming at the problems of large stock of yellow phosphorus slag and low current utilization value，nutrient element auxiliaries needed by crops were added at the source to ensure efficient escape of yellow phosphorus production and realize cooperative activation of silicon and calcium in furnace slag，so as to further produce special fertilizer for rice and realize high value utilization of yellow phosphorus slag.The elemental analysis，X-ray diffraction（XRD） and scanning electron microscopy（SEM） of modified yellow phosphorus slag showed that the yellow phosphorus added with the nutrient additives needed by crops was melted at 1 450 ℃ for 60 min，and the phosphorus escape rate reached 95.56%.The effective SiO₂ content in the yellow phosphorus slag was 36.45%，and the effective CaO content was 47.46%.The slag system showed good glass phase structure，which was conducive to release active nutrients，and remain the trace element additives added from the source in the slag phase.According to the rule of nutrient fertilizer requirement of rice in Yunnan，Guizhou，Sichuan and the synergistic synergism and compatibility of large，medium and trace elements，a special rice fertilizer product 16N-10P₂O₅-14K₂O+7SiO₂+10CaO+0.45Zn was designed with modified yellow phosphorus residue as the main medium element raw materials.The results of element analysis showed that the effectiveness of N，P₂O₅，K₂O，SiO₂，CaO and Zn was 99%，98.81%，99.15%，93.88%，88.53% and 97.78%，respectively.

Key words: modification, yellow phosphorus slag, rice special fertilizer, auxiliary

CLC Number:

TD985

WANG Jie,GU Shouyu,HOU Cuihong,HOU Lishuang,LIU Yuqiong,WANG Menglai,DU Xiongyan,JIANG Wei,LIU Zufeng. Preparation of rice special fertilizer in Yunnan，Guizhou，Sichuan area by modification of yellow phosphorus residue[J]. Inorganic Chemicals Industry, 2022, 54(12): 79-86.

Figures/Tables 14

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原料	主要成分质量分数/%
原料	SiO₂	CaO	Al₂O₃	P₂O₅	MgO	Fe₂O₃	K₂O	Na₂O	其他
磷矿	21.23	39.11	1.88	25.89	1.57	1.24	0.47	0.17	8.44
硅石	87.30	2.22	3.35	1.60	0.36	0.93	0.60	0.21	3.43

原料	工业分析各成分质量分数/%					元素分析各成分质量分数/%
原料	水分	灰分	挥发分	固定碳		SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	TiO₂	其他
焦炭	1.79	28.96	6.77	62.48		37.27	26.64	20.07	6.09	5.19	0.33	4.41

原料	质量/g	原料	质量/g
尿素	280	黄磷渣	165
脲醛	40	FMP	50
磷酸一铵	160	焦磷酸锌	20
氯化钾	235	黏结剂（H₃PO₄）	50

项目	重金属质量分数/（mg·kg^-1）
项目	铬	镉	铅	汞	砷	铊
改性黄磷渣	14.55	0.26	2.5	0.92	19.85	1.56
肥料中限量	500	10	200	5	50	2.5

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Preparation of rice special fertilizer in Yunnan，Guizhou，Sichuan area by modification of yellow phosphorus residue

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