Procedure to convert phosphogypsum waste into valuable products

Ennaciri, Yassine; Bettach, Mohammed

doi:10.1080/10426914.2018.1476763

Cited by 52 publications

(20 citation statements)

References 18 publications

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“…Waste management focuses on managing and monitoring of waste and by-product materials, mainly collection, transportation, processing or disposal [55,56]. Steelmaking by-products, such as steel dust is being processed and utilized in many applications.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Steel-Making Dust in Drilling Fluids Formulations

et al. 2020

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Steelmaking is an energy-intensive process that generates considerable amounts of by-products and wastes, which often pose major environmental and economic challenges to the steel-making industry. One of these by-products is steel dust that is produced during the separation of impurities in the smelting and refining of metals in steel-making furnaces. In this study, electric arc furnace (EAF) dust has been evaluated as a potential, low-cost additive to increase the viscosity and weight of drilling muds. Currently, the cost of drilling operations typically accounts for 50 to 80% of the exploration costs and about 30 to 80% of the subsequent field development costs. Utilization of steelmaking waste in drilling fluids formulations is aimed to produce new and optimized water-based drilling formulations, which is expected to reduce the amount of bentonite and other viscosifier additives used in the drilling formulations. The results showed that in a typical water-based drilling fluid of 8.6 ppg (1030.51 kg/m3), the amount of standard drilling grade bentonite could be reduced by 30 wt.% with the addition of the proposed new additive to complete the required mud weight. The mixture proved to be stable with no phase separation.

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Section: Introductionmentioning

confidence: 99%

Utilization of Steel-Making Dust in Drilling Fluids Formulations

et al. 2020

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“…Phosphogypsum (PG) is a solid waste produced during the wet production of phosphoric acid in the phosphate fertilizer industry, and its main component is CaSO 4 ·2H 2 O or CaSO 4 ·0.5H 2 O [ 1 , 2 , 3 ]. In the wet phosphoric acid production process, about 5–6 tons of phosphogypsum are discharged for every ton of phosphoric acid produced [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Optimization of Phosphogypsum Suspension Decomposition Conditions under Double Catalysis

Chen

2021

Materials

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Phosphogypsum (PG) is not only a solid waste discharged from the phosphate fertilizer industry, but also a valuable resource. After high-temperature heat treatment, it can be decomposed into SO2 and CaO; the former can be used to produce sulfuric acid, and the latter can be used as building materials. In this paper, the catalytic thermal decomposition conditions of phosphogypsum were optimized, and the effects of the reaction temperature, reaction atmosphere, reaction time and carbon powder content on the decomposition of phosphogypsum were studied. The research shows that the synergistic effect of carbon powder and CO reducing atmosphere can effectively reduce the decomposition temperature of phosphogypsum. According to the results of the orthogonal test under simulated suspended laboratory conditions, the factors affecting the decomposition rate of phosphogypsum are temperature, time, atmosphere and carbon powder content in turn, and the factors affecting the desulfurization rate are time, temperature, atmosphere and carbon powder content in turn. Under laboratory conditions, the highest decomposition rate and desulfurization rate of phosphogypsum are 97.73% and 97.2%, and the corresponding reaction conditions are as follows: calcination temperature is 1180 °C, calcination time is 15 min, carbon powder content is 4%, and CO concentration is 6%. The results of thermal analysis of phosphogypsum at different temperature rising rates show that the higher the temperature rising rate, the higher the initial temperature of decomposition reaction and the temperature of maximum thermal decomposition rate, but the increase in the temperature rising rate will not reduce the decomposition rate of phosphogypsum.

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“…Soluble phosphorus and other potentially harmful elements in phosphogypsum can be leached by rainwater to form acidic wastewater, causing the serious pollution of soil and the water system [12][13][14][15][16][17][18]. Therefore, the comprehensive utilization of phosphogypsum has become an important issue for the sustainable development of the phosphorus chemical industry and environmental protection [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Industrial Experiment of Goaf Filling Using the Filling Materials Based on Hemihydrate Phosphogypsum

Rong

Lan

2020

Minerals

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The surface stockpiling of phosphogypsum not only occupies a large amount of land, but also seriously harms the surrounding ecological environment. The preparation of phosphogypsum into filling materials for mine filling can not only maintain the stability of surrounding rock, reduce surface subsidence, enhance the recovery of resources, but it can also completely solve the problem of phosphogypsum stockpiling. Under certain activation conditions, hemihydrate phosphogypsum has a strong cementing property. It is an important way to reduce the filling cost by using hemihydrate phosphogypsum instead of cement as a cementing material. Through laboratory experiments, the filling materials based on hemihydrate phosphogypsum were developed. In order to further verify its feasibility in practical filling engineering, the industrial experiment of goaf filling was carried out in a phosphorus mine. The results show that the filling system was simple, reliable, and easy to operate and manage. The strength of the filling body basically reached the expected strength target of 2.5 MPa in 3 days. The consolidation speed of the filling materials was faster, which is beneficial to the safe underground construction of the mine. The results of the industrial experiment of goaf filling indicate that the filling materials based on hemihydrate phosphogypsum are suitable for mine filling engineering practice, the work amount is small, and the filling cost is low.

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Procedure to convert phosphogypsum waste into valuable products

Cited by 52 publications

References 18 publications

Utilization of Steel-Making Dust in Drilling Fluids Formulations

Utilization of Steel-Making Dust in Drilling Fluids Formulations

Experimental Study on Optimization of Phosphogypsum Suspension Decomposition Conditions under Double Catalysis

Industrial Experiment of Goaf Filling Using the Filling Materials Based on Hemihydrate Phosphogypsum

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