A novel method for purification of phosphogypsum

• Autorzy: Wang Jinming , Dong Faqin , Wang Zhaojia , Yang Feihua , Du Mingxia , Fu Kaibin , Wang Zhen

Identyfikatory

DOI

10.37190/ppmp/127854

• Języki publikacji: EN

Abstrakty

EN

Phosphogypsum is an industrial solid waste from the phosphate fertilizer industry. At present, the accumulation of phosphogypsum has caused very serious economic and environmental problems. A large scale of phosphogypsum is consunmed in the building field. The characteristics of whiteness and phosphorus content are important factors affecting the use of phosphogypsum as a building material. In this study, soluble phosphorus and fluorine were removed by adding lime, and flotation was employed to purify phosphogypsum. A large amount of organic matter and fine slime in the phosphogypsum were removed by reverse flotation, and gypsum was floated by positive flotation. Through the flotation closed-circuit experiment, the whiteness of phosphogypsum was increased from 31.5 to 58.4, the percentage of total phosphorus in gypsum (P2O5) was reduced from 1.78 to 0.89, the grade of calcium sulphate dihydrate was 96.6%, the recovery of concentrate was 74.1%. After removing impurities, the phosphogypsum concentrate reached the first grade national standard of the phosphogypsum building materials in China. The method is cheap and practical, and can be used as an important method for pretreatment of phosphogypsum.

Słowa kluczowe

EN

phosphogypsum; purification; phosphorus; fluorine; building materials

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 5
• Strony: 975--983
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Wang Jinming

• School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Beijing Building Materials Academy of Sciences Research Co., Ltd., Beijing, China
• State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing, China
• Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang, China

autor

Dong Faqin

• School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, China

autor

Wang Zhaojia

• Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Beijing Building Materials Academy of Sciences Research Co., Ltd., Beijing, China
• State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing, China
• State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing, China

autor

Yang Feihua

• Beijing Building Materials Academy of Sciences Research Co., Ltd., Beijing, China
• Beijing Building Materials Academy of Sciences Research Co., Ltd., Beijing, China
• State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing, China

autor

Du Mingxia

• School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, China

autor

Fu Kaibin

• School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang, China

autor

Wang Zhen

• School of Environment and Resource, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, Sichuan, China
• Sichuan Provincial Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang, China

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