MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Phosphogypsum as cement retarder
Modification of phosphogypsum using circulating fluidized bed fly
2022年7月4日 The results solve the problems of high production cost, low production efficiency, and unstable feeding of the current phosphogypsumbased cement retarder and provide a 2012年6月27日 The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste Cement using raw PG as Utilization of solidified phosphogypsum as Portland cement 2012年9月1日 In this study, the effects of phosphogypsum and purified phosphogypsum on the hydration of Portland cement and trass cement were investigated by measuring setting time, strengths of pastes,Utilization of solidified phosphogypsum as Portland 2022年7月4日 This study uses carbide slag, circulating fluidized bed (CFB) fly ash, and other solid wastes to comprehensively modify phosphogypsum required for preparing the cement Modification of phosphogypsum using circulating fluidized bed fly
Deep removal of phosphate impurities in phosphogypsum by two
2023年9月1日 Phosphogypsum (PG) is a solid waste product generated during wetprocess phosphoric acid production Various impurities considerably reduce the purity, whiteness, and 2004年4月1日 In this study, usability of weathered phosphogypsum (PG) from residue areas as set retarder in Portland cement was investigated The effects on the setting and mechanical Utilization of weathered phosphogypsum as set retarder in 2004年9月1日 PG acts as super retarder by extending cement setting process The retardation property of PG calcinated at 250–550 °C was investigated by taking around 5% of resultant PG in cementPurification of South African phosphogypsum for use 2022年6月30日 Remedial thermal treatment of phosphogypsum as a set retarder for Portland cement production is investigated in this research work The SEMEDS analysis of the raw THERMAL TREATMENT OF PHOSPHOGYPSUM AS A SET
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Modification of phosphogypsum using circulating fluidized bed fly
2022年7月1日 Mechanism of calcination modification of phosphogypsum and its effect on the hydration properties of phosphogypsumbased supersulfated cement Shuhua Liu J Ouyang 2004年4月1日 In this study, usability of weathered phosphogypsum (PG) from residue areas as set retarder in Portland cement was investigated The effects on the setting and mechanical properties of PG added in Utilization of weathered phosphogypsum as set retarder in Portland cementORIGINAL ARTICLE Utilization of solidified phosphogypsum as Portland cement retarder Weiguo Shen • Gejin Gan • Rui Dong • Hu Chen • Yu Tan • Mingkai Zhou Received: 3 September 2010 Utilization of solidified phosphogypsum as Portland cement retarder2022年7月1日 Cement retarder preparation is one of the main avenues for the resource utilization of phosphogypsum, and appropriate modification technology is the key for ensuring that the phosphogypsum is Modification of phosphogypsum using circulating fluidized bed
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Deep removal of phosphate impurities in phosphogypsum by
2023年9月1日 Semantic Scholar extracted view of "Deep removal of phosphate impurities in phosphogypsum by twostep crystal transformation for use as Portland cement retarder" by Shaokun He et al Skip to search form Skip to main content Skip to account menu Semantic 2020年5月25日 The cement test proved that treated PG could partially replace natural gypsum as a retarderKeywords: phosphogypsum treatment, phosphorus pentoxide removal, calcium sulfate transition phase PURIFICATION OF PHOSPHOGYPSUM FOR USE AS CEMENT RETARDER Valorizing Phosphogypsum as a Set Retarder in Portland Cement: Investigation on its Heavy Metals Release into Buffered Aqueous Media Ali Kanso (1), Antoine G El (relation of ArcyKozeny) The setting regulator parameter was determined for cementphosphogypsum mixtures An amount of 650 g of cement or cementPG mixture was mixed with 156 Valorizing Phosphogypsum as a Set Retarder in Portland Cement 2023年3月10日 Currently, PG is mainly consumed in applications such as cement retarders [10], [11] and cement binders [12], [13]When mixed with Portland cement, PG is a good cement retarder, and a binder can be made by mixing PG with cement clinker [14], [15]However, such applications are not nearly enough to consume the huge amount of PG produced every yearDevelopment and optimization of phosphogypsumbased geopolymer cement
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Effect of Phosphogypsum on the Properties of Portland Cement
2017年1月1日 In the manufacturing process of cement, phosphogypsum could be used as a replacement of natural gypsum which plays the role of a set retarder [9, 10], or to reduce the clinkerization temperature [11] Study also conducted with weathered (stored in open air) phosphogypsum as a set retarder in Portland cement [10]2019年7月30日 Utilization of solidified phosphogypsum as Portland cement retarder J Mater Cycles Waste Manage, 14 (2012), pp 228233, 101007/s101630120065x View in Scopus Google Scholar [21] M Singh, M Garg Phosphogypsum fly ash cementitious binder its hydration and strength developmentEffect of modified phosphogypsum on the hydration properties 2021年12月1日 However, certain impurities can alter the cement hydration kinetics Thus, this paper aims to analyze the soluble phosphate, fluoride, and pH effects of Brazilian phosphogypsum used as a setting retarder on the hydration of Portland cementValorization of phosphogypsum in cementbased materials: The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste Cement using raw PG as retarder has two problems pressing for Expand 97 Save UTILISATION OF PHOSPHOGYPSUM IN CEMENT MORTAR AND CONCRETEEFFECT OF CALCINED PHOSPHOGYPSUM IN PORTLAND POZZOLANA CEMENT
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Resource utilization and development of phosphogypsumbased
2023年2月10日 Phosphogypsum had high calcium content, so it could be used in the production of cement raw materials in addition to being used as a cement retarder (Rosales et al, 2020) The mortar and concrete produced by cement that contained PG had high compressive strength, which meaned that using PG as a raw material for cement was technically possible ( Islam et 2022年7月1日 DOI: 101016/jconbuildmat2022 Corpus ID: ; Modification of phosphogypsum using circulating fluidized bed fly ash and carbide slag for use as cement retarder @article{Li2022ModificationOP, title={Modification of phosphogypsum using circulating fluidized bed fly ash and carbide slag for use as cement retarder}, author={Bei Xing Li and Modification of phosphogypsum using circulating fluidized bed 2024年1月12日 Phosphogypsum (PG) is a typical industrial waste from the production of phosphoric acid [1], [2], [3] 5 tons of PG will be generated for every ton of phosphoric acidWith a typical proportion of up to 90%, calcium sulfate dihydrate (CaSO 4 2 H 2 O) makes up the majority of the chemical composition of PG [4], [5]However, due to the production process, a Effect of different retarders on setting time and mechanical 2024年5月17日 The effect of phosphogypsum (PG) on the hydration and retardation mechanism of phosphogypsumbased excesssulfate slag cement (PESC) was mainly investigated Based on the natural characteristics of PG, such as low pH value and the presence of soluble phosphorus impurities, the content of PG passing the 475 mm standard sieve was used as a variable to Retardation mechanism of phosphogypsum in phosphogypsum
THERMAL TREATMENT OF PHOSPHOGYPSUM AS A SET RETARDER
2022年6月30日 Phosphogypsum (PG), the byproduct of phosphoric acid industry, comprises of calcium sulfate dihydrate, and other contaminants which restricts the industrial use of phosphogypsum in cement industry as a set retarder Remedial thermal treatment of phosphogypsum as a set retarder for Portland cement production is investigated in this 2023年11月15日 The phosphate impurities in phosphogypsum (PG) were removed efficiently by a novel twostep crystal transformation approach, and the mechanism of the twostep transformation method for removing phosphate and metal impurities from PG was described The effects of modified PG, natural gypsum, and PG as Portland cement retarders on the cement Deep removal of phosphate impurities in phosphogypsum by 2001年7月1日 The ultrasonically treated phosphogypsum displayed a large variability of 50% or more in final and initial setting times, as well as compressive strengths at all ages, and is unsuccessful in rendering the gypsum usable as a set retarder for OPC cementA plant investigation into the use of treated phosphogypsum as a 2022年9月29日 Moreover, only a few byproducts of phosphogypsum are used to manufacture gypsum, bricks, cement, cement retarder, The physical properties of cement prepared by adding 45% of modified red mud and 5% of phosphogypsum as a retarder meet the corresponding national standards, and the cement strength is improved by nearly 10%Collaborative Utilization Status of Red Mud and Phosphogypsum:
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UTILIZATION OF WEATHERED PHOSPHOGYPSUM AS SET RETARDER IN PORTLAND CEMENT
2004年4月1日 DOI: 101016/JCEMCONRES200310017 Corpus ID: ; UTILIZATION OF WEATHERED PHOSPHOGYPSUM AS SET RETARDER IN PORTLAND CEMENT @article{Altun2004UTILIZATIONOW, title={UTILIZATION OF WEATHERED PHOSPHOGYPSUM AS SET RETARDER IN PORTLAND CEMENT}, author={Izzet Altun and 2022年1月1日 Approximately 4–5 tons of PG are generated for every ton of P 2 O 5 produced According to statistics, the worldwide PG generation exceeded 280 Mt/yr [4], of which 75 Mt/yr were generated in China with a total stockpile of more than 600 Mt [5]Up to now, only 15% of the worldwide PG were recycled as cement retarder [[6], [7], [8]], road filling materials [9, 10], soil Recycling of phosphogypsum to prepare gypsum plaster: Effect Building elements made of phosphogypsum, such as wallboards and similar construction elements, give yield to high values of radon emanation together with the mentioned elevated concentrations of 226 Ra Phosphogypsum can be used in Portland cement as a setting time retarder in amounts below 4–5 wt%; then, it is diluted in the concrete and Phosphogypsum an overview ScienceDirect Topics2020年1月20日 A very important and appealing use of PG could be in the cement manufacturing process PG could be used there as a replacement for natural gypsum (NG), as a setting retarder (Potgieter et al, 2003; Altun and Sert, 2004)Based on previous works, this paper analyses the use of PG as setting retarder replacing NG, evaluating its potential of improving the Treated phosphogypsum as an alternative set regulator and mineral
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Recent advances and prospects on retarder application in oilwell cement
2024年10月1日 Li et al (2022) modified phosphogypsum as a cement retarder using circulating fluidized bed fly ash and carbide slag The results show that adding carbide slag and fly ash effectively lowered phosphogypsum's soluble phosphorus and The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste Cement using raw PG as retarder has two problems pressing Retardation effects of phosphate on cement setting time2021年4月1日 Request PDF Valorization of phosphogypsum in cementbased materials: Limits and potential in ecoefficient construction Phosphogypsum (PG) is a type of synthetic gypsum generated during the Valorization of phosphogypsum in cementbased materials: 2022年12月1日 Most of the studies in the literature assessed phosphogypsum cement considering equal increments by mass when compared to natural gypsum cement Utilization of solidified phosphogypsum as Portland cement retarder J Mater Cycles Waste Manag, 14 (3) (2012), pp 228233, 101007/s101630120065xEffect of soluble phosphate, fluoride, and pH in Brazilian
Utilization of solidified phosphogypsum as Portland cement retarder
The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste Cement using raw PG as retarder has two problems pressing for solution,namely, delaying the setting time and difficulty being fed into the cement mill The soluble phosphates in PG behave as superretarder and bring about retarding in the Request PDF On Dec 20, 2023, Lei Xu and others published Modification of recycled cement with phosphogypsum and GGBS fluidized bed fly ash and carbide slag for use as cement retarder, Constr Modification of recycled cement with phosphogypsum and GGBSPhosphogypsum was chemically pretreated by using lime solution,ammonium hydroxide,and aqueous citric acid solution,respectivelyThe content of impurities of purified phosphogypsum was examined and its DTA was performedThe setting time and strength of the cement produced with purified phosphogypsum were testedResults showed that the phosphogypsum pretreated by Investigation of cement retarder made of chemically pretreated 2004年4月1日 In this study, usability of weathered phosphogypsum (PG) from residue areas as set retarder in Portland cement was investigated The effects on the setting and mechanical properties of PG added in Utilization of weathered phosphogypsum as set retarder in Portland cement
Utilization of solidified phosphogypsum as Portland cement retarder
ORIGINAL ARTICLE Utilization of solidified phosphogypsum as Portland cement retarder Weiguo Shen • Gejin Gan • Rui Dong • Hu Chen • Yu Tan • Mingkai Zhou Received: 3 September 2010 2022年7月1日 Cement retarder preparation is one of the main avenues for the resource utilization of phosphogypsum, and appropriate modification technology is the key for ensuring that the phosphogypsum is Modification of phosphogypsum using circulating fluidized bed 2023年9月1日 Semantic Scholar extracted view of "Deep removal of phosphate impurities in phosphogypsum by twostep crystal transformation for use as Portland cement retarder" by Shaokun He et al Skip to search form Skip to main content Skip to account menu Semantic Deep removal of phosphate impurities in phosphogypsum by 2020年5月25日 The cement test proved that treated PG could partially replace natural gypsum as a retarderKeywords: phosphogypsum treatment, phosphorus pentoxide removal, calcium sulfate transition phase PURIFICATION OF PHOSPHOGYPSUM FOR USE AS CEMENT RETARDER
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Valorizing Phosphogypsum as a Set Retarder in Portland Cement
Valorizing Phosphogypsum as a Set Retarder in Portland Cement: Investigation on its Heavy Metals Release into Buffered Aqueous Media Ali Kanso (1), Antoine G El (relation of ArcyKozeny) The setting regulator parameter was determined for cementphosphogypsum mixtures An amount of 650 g of cement or cementPG mixture was mixed with 156 2023年3月10日 Currently, PG is mainly consumed in applications such as cement retarders [10], [11] and cement binders [12], [13]When mixed with Portland cement, PG is a good cement retarder, and a binder can be made by mixing PG with cement clinker [14], [15]However, such applications are not nearly enough to consume the huge amount of PG produced every yearDevelopment and optimization of phosphogypsumbased geopolymer cement2017年1月1日 In the manufacturing process of cement, phosphogypsum could be used as a replacement of natural gypsum which plays the role of a set retarder [9, 10], or to reduce the clinkerization temperature [11] Study also conducted with weathered (stored in open air) phosphogypsum as a set retarder in Portland cement [10]Effect of Phosphogypsum on the Properties of Portland Cement2019年7月30日 Utilization of solidified phosphogypsum as Portland cement retarder J Mater Cycles Waste Manage, 14 (2012), pp 228233, 101007/s101630120065x View in Scopus Google Scholar [21] M Singh, M Garg Phosphogypsum fly ash cementitious binder its hydration and strength developmentEffect of modified phosphogypsum on the hydration properties
Valorization of phosphogypsum in cementbased materials:
2021年12月1日 However, certain impurities can alter the cement hydration kinetics Thus, this paper aims to analyze the soluble phosphate, fluoride, and pH effects of Brazilian phosphogypsum used as a setting retarder on the hydration of Portland cement