中低品位胶磷矿酸解液的矿化富集技术研究

doi:10.19964/j.issn.1006-4990.2024-0042

Abstract

Abstract:

In order to achieve the sustainable development of phosphorus chemical industry，it is necessary to reduce the waste of phosphate mineral resources，explore the new utilization technology of medium and low grade collophanite ore，and provide a new method for the development and utilization of phosphate mineral resources.Taking medium and low grade collophanite acid solution as the research object，the high grade phosphate concentrate was produced by calcium carbonate and lime milk neutralization two mineralization and ammonia enrichment.The experiment was focused on research of calcium carbonate and lime milk neutralization and ammonia ammonia optimal pH value.The enrichment of high grade phosphate concentrate was through process exploration.Then the increase of phosphorus yield was explored，the efficient utilization of phosphorus resources was realized.The results showed that the mineralization enrichment process of medium and low grade collophanite acid solution pH using calcium carbonate to 2.08，150 min，then lime milk regulation pH to 2.79，finally with ammonia pH to 3.52，phosphate concentrate with P₂O₅ grade higher than 36% was generated，phosphorus yield was about 99.5%，the filtrate after concentration caould produce qualified ammonium nitrate compound fertilizer products.This study provided new ideas and methods for the efficient utilization of medium and low grade collophanite ore，which was of great significance for the exploitation and utilization of medium and low grade collophanite ore resources in the future.

Key words: medium and low grade collophanite ore, enrichment, phosphate concentrate

CLC Number:

TQ126.3

XIE Mi, YANG Xiushan, HOU Yidong, ZHU Guihua, LI Jianwen. Study on mineralization enrichment technology of medium and low grade collophanite acid solution[J]. Inorganic Chemicals Industry, 2024, 56(10): 76-85.

Figures/Tables 22

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pH	w（P₂O₅）/%	w（CaO）/%	w（MgO）/%	w（Al₂O₃）/%	w（Fe₂O₃）/%	w（SiO₂）/%	w（F^-）/%	w（NO₃^-）/%
2.43	37.871	32.542	0.150	1.166	1.077	0.550	1.860	1.550
2.57	38.028	32.658	0.156	1.144	1.139	0.656	1.970	1.683
2.79	38.554	32.809	0.245	1.213	1.089	0.804	1.900	1.196
3.01	37.957	33.012	0.233	1.497	1.112	0.697	1.912	1.235

pH	磷收率/%	pH	磷收率/%
2.43	96.15	2.79	99.53
2.57	97.65	3.01	99.57

pH	w（P₂O₅）/%	w（CaO）/%	w（MgO）/%	w（Al₂O₃）/%	w（Fe₂O₃）/%	w（SiO₂）/%	w（F^-）/%	w（NO₃^-）/%
3.20	37.311	36.378	0.392	1.196	1.116	0.612	2.130	1.240
3.42	36.735	38.122	0.383	1.355	1.231	0.744	2.240	0.841
3.52	36.135	39.622	0.375	1.380	1.219	0.736	2.320	0.717
3.63	35.791	40.746	0.385	1.585	1.387	0.560	2.150	0.607
3.82	34.157	45.472	0.374	1.626	1.404	0.992	2.220	0.713

矿化 pH	滤液				洗液
矿化 pH	w（P₂O₅）/%	w（CaO）/%	w（NO₃^-）/%	w（NH₄⁺）/%	w（P₂O₅）/%	w（CaO）/%	w（NO₃^-）/%	w（NH₄⁺）/%
3.20	0.023	7.504	24.534	0.386	0.012	3.297	10.363	0.167
3.42	0.102	8.282	24.756	0.501	0.046	3.747	10.894	0.225
3.52	0.100	8.370	25.154	0.566	0.043	3.647	10.584	0.239
3.63	0.017	7.819	25.509	0.720	0.022	3.602	10.850	0.296
3.82	0.034	7.730	26.926	0.823	0.024	3.871	10.983	0.321

pH	滤液n（NO₃^-）∶n（CaO）∶ n（NH₄⁺）	洗液n（NO₃^-）∶n（CaO）∶ n（NH₄⁺）
3.20	17.47∶6.25∶1	17∶6.34∶1
3.42	13.33∶5.31∶1	13.06∶5.35∶1
3.52	11.91∶4.76∶1	11.85∶4.9∶1
3.63	9.29∶3.49∶1	9.65∶3.92∶1
3.82	8.5∶3.02∶1	8.92∶3.87∶1

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Study on mineralization enrichment technology of medium and low grade collophanite acid solution

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