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 neutralization modification
Neutralization of Phosphogypsum for Use in Base Lining System of
2023年12月4日 The study indicated effective neutralization of phosphogypsum with 16% lime and 50% fly ash KEYWORDS: Phosphogypsum, Composite Liner System, Neutralization, 2022年7月30日 According to the different proportion of phosphogypsum and red clay, the strength characteristics, dynamic characteristics, expansion characteristics and shrinkage Mechanical properties and modification mechanism of 2020年5月20日 The phase transformation of PG, the removal of soluble phosphorus impurities, and the hydration properties of SSC containing PG with or without modification are Mechanism of calcination modification of phosphogypsum and its 2020年11月1日 In this study, the effect of neutralisation process under different lime concentration and times on removability of P 2 O 5 in PG was examined Moreover, both fresh Application of lime neutralised phosphogypsum in supersulfated
Neutralization of Phosphogypsum for Use in Base Lining System of
2023年12月19日 Hence, the present work is intended to neutralize phosphogypsum with lime, fly ash, and pond ash and to assess the suitability of neutralized phosphogypsum for use in the 2024年4月12日 Mechanical force coupled temperature modification methods such as ball milling will be used to pretreat phosphogypsum, and the influence laws of temperature, treatment Highly efficient modified phosphogypsum building gypsum 2022年11月5日 The modification of inorganic cementitious materials can significantly improve the mechanical properties and water resistance of gypsum, which is one of the effective methods for the modification of industrial Effect of Synergistic Modification of Building Materials 2024年5月8日 Normally, the acidic impurities in hemihydrate phosphogypsum (HPG) must be neutralized when HPG is utilized, and a little amount of calcium hydroxide (CH) is the best choice In this paper, the effects of excessive CH (5 Enhancing the Performance of Hemihydrate
Role of Additives: Modified Hemihydrate
Our work shows that the modified morphologies by DG and PVA enhance the filtration strength of phosphogypsum, and the enhanced filtration strength would reduce the water content of hemihydrate phosphogypsum and relieve the 2022年5月2日 Phosphogypsum (PG) is one of solid wastes with large amount of yield and serious pollution, which has attracted wide attention The aim of this study is to investigate filling performance of PG on polypropylene (PP) or highdensity polyethylene (HDPE) matrix In this work, PG was calcined initially to improve whiteness and fix impurities Xray diffraction (XRD) Surface modification of phosphogypsum and application in 2022年1月1日 Mineral processing tailings (eg, powered rock dust and phosphogypsumPG) control the budget of NPs on a global scale and thus affect physical and biogeochemical processes in terrestrial and marine environments (Dalmora et al, 2016; Lütke et al, 2020) and the atmosphere including the nucleation of clouds (Retallack, 2011, 2012; Marshall et al, 2016)A review on the environmental impact of phosphogypsum and 2022年9月29日 Red mud and phosphogypsum are the solid waste byproducts of the alumina and phosphoric acid production processes, respectively Their global annual production has reached 11–12 billion tons and 150–200 million tons, respectively [1,2,3,4,5,6]Globally, the total amount of red mud produced every year is between 60 and 120 million tons, about 30 million Collaborative Utilization Status of Red Mud and Phosphogypsum:
Mechanism of calcination modification of phosphogypsum and
2020年5月20日 Mechanism of calcination modification of phosphogypsum and its effect on the hydration properties of phosphogypsumbased supersulfated cement Author links open overlay panel Shuhua Liu a, the calcination at 500 °C for PG is better than neutralization with 4% lime in SSC To sum up, according to these studies, The research results show that, after the phosphogypsum whiskers are modified with calcium stearate, a coating layer will be formed on the surface of the whiskers, which effectively reduces the solubility of the phosphogypsum whiskers The best modification conditions are: the amount of calcium stearate relative to the absolute dry mass of the Effects of phosphogypsum whiskers modification with calcium 2023年12月19日 Phosphogypsum is generated as a byproduct during the manufacturing of phosphoric acid by wet process Annually, the worldwide projected value of phosphogypsum generation is 100280 metric tons Due to its acidic nature, radioactivity, high fluorine content, presence of trace elements and huge volume, direct dumping of phosphogypsum on the Neutralization of Phosphogypsum for Use in Base Lining System 2022年1月11日 Phosphogypsum (PG) treatment is one of the research hotspots in the field of environmental protection Many researchers both at home and abroad have devoted themselves to studies on harmless resource treatment of PG, but the treatment technology is unable to meet the demand of PG consumption due to the huge production and storage demands In order to Study of SemiDry High Target Solidification/Stabilization of
Potential uses of phosphogypsum: A review Request PDF
2022年7月29日 Phosphogypsum (PG) is a byproduct of the phosphate fertilizer industry that is produced during the phosphoric acid production process Annual global PG production ranges between 100 to 300 Mt 2021年12月13日 Phosphogypsum (PG) is an industrial solid waste obtained from the production of phosphoric acid [1]The primary composition of PG is gypsum, but it contains harmful impurities such as phosphate and fluoride [2]Therefore, PG was identified as a hazardous solid waste for the first time by the Ministry of Ecology and Environment of the People’s Republic of China in Dehydration behaviour and impurity change of phosphogypsum during 2022年5月2日 Request PDF Surface modification of phosphogypsum and application in polyolefin composites Phosphogypsum (PG) is one of solid wastes with large amount of yield and serious pollution, which has Surface modification of phosphogypsum and application in The present invention discloses a phosphogypsum purification and neutralization apparatus The phosphogypsum purification and neutralization apparatus comprises a purification device and a neutralization device The purification device comprises a phosphogypsum feeding pipeline (15), a turntable filter (1), a washing and cycling water tank (2), a vacuum pump (3), a wastewater CNA Phosphogypsum purification and neutralization apparatus
HighEfficiency Purification and Morphology
2024年8月19日 Phosphogypsum is a solid waste with great environmental stockpile pressure produced by the wet production of phosphoric acid Although there are various methods to purify and utilize phosphogypsum, the means for 2019年7月30日 Supersulfated cement (SSC) is a kind of environmentfriendly cement with less or even no clinker, which could consume a lot of phosphogypsum (PG) In order to improve the property of original PG, two modification methods have been taken to study the hydration properties of SSC containing PG with or without modificationEffect of modified phosphogypsum on the hydration properties 2023年3月13日 Phosphogypsum (PG) is a hazardous industrial solid waste product from the wet phosphate industry 1,2The widespread deposition of that fine, light to darkgrey, powder with a slight odor and Preparation of gypsum with high purity and whiteness from phosphogypsum 2020年5月20日 Therefore, some modification methods to PG have been taken, such as washing, flotation, and lime neutralization, calcination, which can reduce the content of impurities in PG to some extent and improve its effect in binders [24], [25]Mechanism of calcination modification of phosphogypsum and
Effect of neutralization on the setting and hardening characters
2018年11月30日 The best modification conditions are: the amount of calcium stearate relative to the absolute dry mass of the phosphogypsum whisker is 200%; the modification time is 30 min, and the modification Request PDF On Oct 1, 2024, Daolin Wang and others published Hydration process and fluoride solidification mechanism of multisource solid wastebased phosphogypsum cemented paste backfill under Hydration process and fluoride solidification mechanism of multi 2021年12月1日 Download Citation Dehydration behaviour and impurity change of phosphogypsum during calcination The preparation of βhemihydrate gypsum is an important approach for largescale utilization of Dehydration behaviour and impurity change of phosphogypsum Already in 1987 in Kedainiai near the chemical enterprise a plant for phosphogypsum processing into Pmodification building gypsum was built according to the project made by the instituteThe wasteless technology was based on the neutralization of phosphogypsum but not its washing with water The essence of the technology is as follows:The problems of phosphogypsum utilization in Lithuania
Phosphogypsum circular economy considerations: A critical
2023年8月15日 Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore PG also exists in very small amounts in nature where it is the result of natural guano processes as they took for instance place in the Cioclovina Cave located in the 2020年9月25日 When phosphorous chemical enterprises adopt wet process to produce phosphoric acid, a large amount of solid waste phosphogypsum (PG) will be produced (Wu et al 2022a;Mishra et al 2010;Silva et A novel method for purification of phosphogypsum2020年11月1日 The study of neutralization of the dihydrate phosphogypsum impurities Ceramics, 50 (3) (2006), pp 178184 View in Scopus Google Scholar Lam, 2020 Mechanism of calcination modification of phosphogypsum and its effect on the hydration properties of phosphogypsumbased supersulfated cement Construct Build Mater, 243 (2020), pApplication of lime neutralised phosphogypsum in supersulfated cement 2017年6月19日 Phosphogypsum is traditionally used for reclamation and neutralization of the alkaline reaction of saline soils [14] [15] [16], but there have been published papers with positive results of its Phosphogypsum: potential uses and problems – a
Purification of South African phosphogypsum for use as
2004年9月1日 The impurities in phosphogypsum greatly compounds by using lime or limestone as the neutralization agent [24, 25 impact on the mineralogical modification for effective 2020年7月1日 In order to avoid the negative impact of the impurity in phosphogypsum, a series of methods can be implemented, such as water washing, lime neutralization, calcination, and other methods to Application of Lime Neutralised Phosphogypsum in2007年9月1日 Chemical stabilization is the modification of the properties of a locally available soil to improve its engineering performance Phosphogypsum, a solid byproduct of phosphoric acid manufacturing, can potentially stabilize the expansive or nonexpansive soils mixed with cement and class C fly ashApplication of phosphogypsum in soil stabilizationacid, 4–5 tons of phosphogypsum are produced (El Issiouy et al 2013; Papastefanou et al 2006) Currently, between 3 and 4 billion tons of phosphogypsum have been produced, with an annual rise of 300 million tons (Cuadri et al 2021) The question of considering phosphogypsum as a waste or a resource has beenPhosphogypsum: Properties and Potential Use in Agriculture
Calcination parameters on phosphogypsum waste recycling
2020年9月30日 Mechanism of calcination modification of phosphogypsum and its effect on the hydration properties of phosphogypsumbased supersulfated cement Constr Build Mater, 243 (2020), Article , 101016/jconbuildmat2020 View PDF View article View in Scopus Google Scholar [4]2024年1月15日 Phosphogypsum (PG), the main industrial byproduct of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate However, it contains various impurities with variable quantities depending on the origin of the phosphate rock These impurities can restrict the reuse of phosphogypsum as a secondary primary resourceExploring the potential reuse of phosphogypsum: A waste or a 2018年5月1日 Although phosphogypsum is inexpensive, it requires water washing, chemical neutralization with basic solutions, calcination and other pretreatment operations before it can be used, all of which Phosphogypsum stabilization of bauxite residue: Conversion of its 2023年3月30日 Phosphogypsum (PG) is an industrial byproduct of the transformation of phosphate rocks For decades, PG has been a source of environmental concern due to the massive amount produced thus far, ie, 7 billion tons, with a current production rate of 200–280 million tons per year Phosphate minerals contain various impurities that precipitate and Staged purification of phosphogypsum using pHdependent
Review on highvalue utilization of phosphogypsum: Utilization of
2024年9月20日 In recent years, although the overcapacity in the domestic phosphate fertilizer industry has been plagued by the upstream and downstream markets, the contradiction between supply and demand is still prominent [50], [51], [52], [53]A large amount of PG is still produced, which is stored in the form of large slag mountains in the surrounding ecological environment, 2019年3月1日 SEM images suggested that phosphogypsum could promote the formation of stable macroaggregates, whilst the content of Ca 2 + increased from 56% to 182% and Na reduced from 68% to 24% Treatment with phosphogypsum could significantly promote the transformation of alkalinity cations by neutralization, precipitation and replacement reactionsPhosphogypsum stabilization of bauxite residue: Conversion 2024年2月26日 Phosphogypsum (PG) is a byproduct produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks Approximately 4–6 tons of PG is produced per ton of Properties, Purification, and Applications of Phosphogypsum: A 2022年6月1日 Request PDF Deep removal of phosphorus and synchronous preparation of highstrength gypsum from phosphogypsum by crystal modification in NaClHCl solutions Phosphogypsum (PG) is a bulk solid Deep removal of phosphorus and synchronous preparation of
Highly targeted solidification behavior of hazardous components
2022年3月15日 The components analysis of PG and CS means that CS is an alkaline industrial byproduct, while PG is acidic, and both of them have a certain acidbase neutralization effect Combined with the TGDSC analysis, as shown in the Fig 4 , in the temperature range of 25 °C to 130 °C, the adhesion water and a half crystal water of PG are gradually volatilized as the 2020年6月11日 The modification effect of calcium (in an autoclave The increased quantity of alkalies in the recycling water did not have influence on the phosphogypsum neutralization process and on the Effect of Modified Phosphogypsum on Properties of Cement Mortar2024年8月15日 Phosphogypsum (PG) is a major The lime neutralization method is simple, effective, and lowcost, The surface modification of PG showed better compatibility and dispersion in asphalt [193] It was shown that PG as filler of asphalt mixture helped to enhance the stripping resistance and water stability [194, 195]Phosphogypsumbased building materials: Resource utilization 2022年11月5日 Alphahemihydrate phosphogypsum (αHPG) is a cementitious material obtained by dehydration of phosphogypsum (PG), a byproduct of phosphoric acid production Poor water resistance of αHPG has usually restricted its application in construction materials In this study, hydroxyterminated polydimethylsiloxane (HPDMS) and Portland cement (PC) Effect of Synergistic Modification of Building Materials Based on
Phosphogypsum recycling: New horizons for a more
2020年2月1日 Phosphogypsum (PG) is a waste product of phosphate fertilizer and phosphoric acid industries Vast quantities of the waste product are generally left stockpiled on the ground or discharged into