Optimization of wet-process phosphoric acid for high-quality phosphogypsum

• Autorzy: Fan Xuyang , Zhou Chenyu , Xiao Tingting , Wang Haoran , Wu Hanjun , Li Zhongjun , Pan Zhiquan , Zhou Hong

Identyfikatory

DOI

10.37190/ppmp/192938

• Języki publikacji: EN

Abstrakty

EN

The chronic accumulation of phosphogypsum (PG) has resulted in significant environmental contamination issues within the wet-process phosphoric acid (WPPA) industry. An innovative technical route for transforming PG into a resource has been achieved through the introduction of floc flotation and acid cleaning in WPPA. The floc flotation using cationic polyacrylamide as a flocculant and micro lotion, which is composed of dioctyl phthalate, polyoxyethylene(10)nonylphenyl ether, kerosene, and n-octanol as a collector, has been performed. The effect of floc flotation on product quality and the underlying mechanisms were investigated by XRF, FT-IR, SEM, and 2-dimensional fractal dimension analysis. The optimal parameters were determined through a factor experiment, which yielded the following results: floc flotation temperature 65ºC, cationic polyacrylamide 180 g/Mg, collector 1.08 kg/Mg, and flushing sulfuric acid concentration 20%. The resulting PG exhibited a high grade of 95.01%, whiteness of 70.8%, and gypsum recovery of 93.52%. Furthermore, the soluble phosphorus and soluble fluorine levels are below 0.1%. In the flotation process, the combination of polyacrylamide and collector effectively separated fine organic matter and siliceous material with a hydrophobic bubble, facilitating their upward movement and subsequent separation from PG. The new WPPA, which exhibits enhanced product quality and reduced production costs, can be utilized extensively within the WPPA.

Słowa kluczowe

EN

phosphogypsum; optimization; purification; floc flotation; acid cleaning

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 5
• Strony: art. no. 192938
• Opis fizyczny: Bibliogr. 48 poz., rys., tab., wykr.

Twórcy

autor

Fan Xuyang

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China

autor

Zhou Chenyu

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China

autor

Xiao Tingting

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China

autor

Wang Haoran

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China

autor

Wu Hanjun

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430074, Hubei, China

autor

Li Zhongjun

• Research and Development Center, Hubei Three Gorges Laboratory, Yichang 443007, China

autor

Pan Zhiquan

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China
• Hubei Yangtze Resources Recycling and Equipment Innovation R&D Center Co., Ltd, Wuhan 430223, China

autor

Zhou Hong

• School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China
• Hubei Yangtze Resources Recycling and Equipment Innovation R&D Center Co., Ltd, Wuhan 430223, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).