Effect of Flotation Purification on Preparation of β—Hemihydrate Gypsum from Phosphogypsum

WANG Jinming; DU Mingxia; LI Guohuan; DONG Faqin; TAN Hongbin

doi:10.13779/j.cnki.issn1001-0076.2023.04.012

2023 Vol. 43, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(4): 107-113

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WANG Jinming, DU Mingxia, LI Guohuan, DONG Faqin, TAN Hongbin. Effect of Flotation Purification on Preparation of β—Hemihydrate Gypsum from Phosphogypsum[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 107-113. doi: 10.13779/j.cnki.issn1001-0076.2023.04.012

Citation:

WANG Jinming, DU Mingxia, LI Guohuan, DONG Faqin, TAN Hongbin. Effect of Flotation Purification on Preparation of β—Hemihydrate Gypsum from Phosphogypsum[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 107-113. doi: 10.13779/j.cnki.issn1001-0076.2023.04.012

Effect of Flotation Purification on Preparation of β—Hemihydrate Gypsum from Phosphogypsum

1.
School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
2.
State Key Laboratory of Mineral Processing, Beijing 100192, China
3.
State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing 100041, China
4.
Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
5.
Sichuan Engineering Lab of Non−metallic Mineral Powder Modification & High−value Utilization, Mianyang 621010, sichuan, China

Received Date: 07 March 2023

Publish Date: 25 August 2023

Abstract

Abstract

Phosphogypsum produced by phosphorus chemical industry is the bulk industrial solid waste. The impurities would reduce the performance of β−hemihydrate gypsum that was prepared from phosphogypsum. In this study, phosphogypsum was purified by flotation method, and the performance of β−hemihydrate gypsum prepared from phosphogypsum before and after purification was compared. The results showed that the fine slime and organic impurities were removed by reverse flotation with methyl isobutyl methanol as foaming agent, and the dihydrate gypsum was floated by dodecamine. Compared with phosphogypsum ore, the whiteness and purity of the concentrate increased from 19.4% to 41.1% and 73.12% to 96.41%, respectively. The 2−hour flexural strength, compressive strength and 3−day dry compressive strength of β−gypsum that was prepared from phosphogypsum concentrate were 22.8%, 14.1% and 24.1% higher than those was prepared from raw ore, respectively. Whiteness increased from 27.8% to 46.3%. Flotation purification can significantly improve the performance of phosphogypsum in β−gypsum preparation.
- phosphogypsum /
- flotation /
- purification /
- β gypsum /
- strength

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References

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