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 calcite ore deposition environment
A review on the environmental impact of phosphogypsum and
2022年1月1日 Anthropogenic NPs derived from PG have been one of the principal catalytic components of marine pollution throughout history The deposition of PG along coastlines 2024年1月15日 In this review, we will i) explore the chemical, radiological and mineralogical characteristics of PG; ii) discuss the environmental concerns related to land discharge and sea Exploring the potential reuse of phosphogypsum: A waste or a 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 Properties, Purification, and Applications of Phosphogypsum: A 2017年6月19日 Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement In this study, raw phosphogypsum wasPhosphogypsum: potential uses and problems – a
Advances in Phosphogypsum Calcination and
Five challenges that restrict the commercial promotion of PG calcination and decomposition processes are perfecting the calcium–sulfur conversion mechanism, establishing a process strengthening strategy, developing value 2022年6月29日 This paper summarizes the generation process, impurity removal treatment (physical method, chemical method, heat method), highvalue utilization (nanometer calcium sulfate whisker, nanometer calcium carbonate) The Generation Process, Impurity Removal and High 2021年2月9日 Five clusters were formed: a red clusterphosphogypsum recycling in the construction industry; green clusterradiation pollution problem of phosphogypsum and phosphate fertilizers; yellow(PDF) Phosphogypsum Recycling: A Review of 2024年11月12日 Phosphogypsum (PG) is an industrial solid waste, and the production of CaO by CO reduction of PG can not only solve the environmental problems caused by PG, but also Unlocking the Value of Phosphogypsum Waste: Steam
Characterization of phosphate rock and phosphogypsum from
2018年3月12日 To better understand the dynamic and behavior of phosphate/phosphogypsum contaminants from raw ores to marine environment, a chemical, organic, mineralogical, and A new approach to determine the phosphogypsum spread from the deposition site into the environment ion T Bituh et al / Journal of Hazardous Materials 261 (2013) 584–592 585 Fig 1 Phosphogypsum deposition site located ∼4 km southward Of the total amount of natural radionuclides in phosphate ore, during processing about 80 A new approach to determine the phosphogypsum spread from 2017年6月19日 from phosphate r ock ore to the environment A pplied Geoche mistry, 25, 705–715 the radiological impact of a phosphogypsum deposition site on the surro unding environmentPhosphogypsum: potential uses and problems – a 2022年1月1日 The deposition of PG along coastlines represent environmental risks as the dispersion of NPs by Aeolian and fluvial processes can affect in marine ecosystems in different parts of the world Many of the PG factories continue to operate, however, some have already been abandoned by the private sector (Silva et al, 2021a)A review on the environmental impact of phosphogypsum and
A new approach to determine the phosphogypsum spread from
2013年8月12日 Phosphogypsum (PG), a waste product in phosphate fertilizer production, is characterized by technically enhanced natural radioactivity The presented investigation was performed on a PG deposition To better understand the dynamic and behavior of phosphate/ phosphogypsum contaminants from raw ores to marine environment, a (Re) and 87,24960 (F) tons The phosphate rock was found to be formed by carbonate fluorapatite, calcite, dolomite Sequential chemical extraction for a phosphogypsum environmental impact evaluation NASA phosphogypsum disposal environment: Topics by Sciencegov2017年12月31日 The greatest environmental concern arises from the deposition of untreated PG in openair piles covering vast land areas, often in proximity to near water bodies (Lieberman et al, 2020;Romero Environmental Assessment and Management of Phosphogypsum 2010年7月11日 Voluminous stockpiles of phosphogypsum (PG) generated during the wet process production of phosphoric acid are stored at many sites around the world and pose problems for their safe storage, disposal, or utilization A major concern is the elevated concentration of longlived 226Ra (halflife = 1,600 years) inherited from the processed Radionuclides, trace elements, and radium residence in phosphogypsum
Seasonal variations and environmental controls on stalagmite calcite
2010年12月4日 Stalagmite growth rates are usually considered to reflect changes in paleoclimate and paleoenvironment However, how exactly growth rates are affected by climate and environment is still unclear We launched a monitoring and modeling program that lasted approximately 4 years on two active drip sites in Heshang Cave, central China We collected 2021年3月1日 Request PDF Transfer characteristic of fluorine from atmospheric dry deposition, fertilizers, pesticides, and phosphogypsum into soil Fluorine (F) is widely dispersed in the environment and Transfer characteristic of fluorine from atmospheric dry deposition Radionuclides, trace elements, and radium residence in phosphogypsum of Jordan Environmental Geochemistry and Health Official Journal of the Society for Environmental Geochemistry and Health ISSN 02694042 Volume 33 Number 2 Environ Geochem Health (2011) 33:149165 DOI 101007/ s1065301093284 1 23 Your article is protected by copyright and all rights are held Radionuclides, trace elements, and radium residence in phosphogypsum 2021年2月9日 PDF The problem of recycling and storage of phosphogypsum is topical for many countries around the world, as it is associated with environmental (PDF) Phosphogypsum Recycling: A Review of
Radionuclides, trace elements, and radium residence in phosphogypsum
influences the environmental mobility of radium and the radiationexposure pathways near PG stockpiles Keywords Radium Rare earth elements Phosphogypsum Barite Radiobarite Jordan Introduction Phosphogypsum (PG) is a byproduct of the ‘wet process’ for producing phosphoric acid from phosphate rock The operative chemical reaction isA measurement of the radioactivity content of phosphate ore material, phosphatic fertilizer (superphosphate), and byproduct phosphogypsum in the AbuZaabal phosphate plant, Egypt, has been carried out and compared with those given in the literature for some other countries in light of permissible radiation dose rates A measurement of the radioactivity content of Radioactivity of phosphate ore, superphosphate, and phosphogypsum 2020年1月15日 In Spain, two H 3 PO 4 production sites with a total capacity of ∼500–600 kt of P 2 O 5 were both located in Huelva (SW Spain) (Abril et al, 2009, Dueñas et al, 2010, Gázquez et al, 2014, PérezLópez et al, 2016, PérezLópez et al, 2010) These facilities started production in the late 1960s using phosphate rock mostly imported from Morocco (and Senegal to a The geochemical evolution of brines from phosphogypsum 2020年6月14日 The leaching results of 226 Ra and 210 Pb in calcite exceeded the reference values, (SW Spain): From phosphate rock ore to the environment Appl Geochem 2010 2020 "Environmental Impact of PhosphogypsumDerived Building Materials" International Journal of Environmental Research and Public Health 17, no 12: 4248 https Environmental Impact of PhosphogypsumDerived Building Materials
Environmental impacts of phosphogypsum ScienceDirect
1994年6月13日 The main environmental concerns associated with phosphogypsum are: (i) movement of fluoride, sulfate, total dissolved solids, certain trace elements, and radionuclides from the U238 decay series below phosphogypsum stacks into groundwater supplies; (ii) radon222 exhalation which may pose a health risk to workers on the site or people living close to Life cycle assessment (LCA) is a widely used method for comprehensively analyzing the environmental impacts of waste management strategies and technologies, providing critical technical support for promoting waste optimization management and developing a circular economy (Dong et al, 2024)In the context of PG recycling and utilization, previous studies Life cycle environmental and economic assessment of Phosphogypsum 2024年10月30日 These stacks are formed through a continuous cycle of deposition and compaction As phosphogypsum slurry is pumped to designated storage areas, it settles, with the solid particles gradually sinking to the bottom These metals originate from the phosphate ore and pose potential environmental hazards, especially when exposed to waterGypsum Stacks: Formation, Composition, and Environmental ImpactBituh T, et al Measuring and modelling the radiological impact of a phosphogypsum deposition site on the surrounding environment Arh Hig Rada Toksikol 2015;66: Quality assurance was implemented Measuring and modelling the radiological impact of a phosphogypsum
Dynamics of contaminants in phosphogypsum of the fertilizer
2010年5月1日 The dynamics of trace elements from phosphate rock ore to the environment in a phosphoric acid plant located in SW Spain and the impact of phosphogypsum wastes were investigated through total digestion and BCRsequential extraction Based on total concentration, element transfer factors as criteria for examining the potential environmental risk of waste with 2023年2月28日 The objectives of this bibliographic work are to (1) Determine the processes of PG generation and the factors that influence its properties (2) Determine the physical, chemical, and radioactive properties of PG (3) Discuss the potential uses of phosphogypsum in agriculture (4) Define the effects of PG on crop production, soil, water, and the environmentPhosphogypsum: Properties and Potential Use in Agricultureformedbycarbonatefluorapatite,calcite,dolomite,naturalgypsum,quartz,calciteMg,apatite,pyrite,fluorite,andsphaleriteCd and phosphogypsum by synthetic gypsum and sphaleriteCd The phosphate was found to be richer in organic compoundsCharacterization of phosphate rock and phosphogypsum from 2018年10月28日 In fact, when deposited under the conventional water content (30–32%), a clear heap form is obtained The Phosphogypsum starts to dry and local subsidences acquire at the foot of the heap Chaari The deposition of Phosphogypsum with a water content ω > 30–32% results in slides at the top of the deposit assimilated to mudflowsPhosphogypsum Management Challenges in Tunisia
Properties of Cemented Filling Materials Prepared from Phosphogypsum
2024年7月22日 Phosphogypsum (PG) occupies a large amount of land due to its large annual production and low utilization rate, and at the same time causes serious environmental problems due to toxic impurities PG is used for mine backfill, and industrial solid waste is a curing agent for PG, which can save the filling cost and reduce environmental pollution In this paper, PG was 2017年8月2日 The phosphate content of the ores, depending on conditions of deposition and secondary enrichment, ranges from 10% to more than 70% BPL The recovery of byproducts from phosphorite ores has been uncommon, with the exception of commercial uranium extraction from phosphoric acidPhosphorus and Phosphates SpringerLink2020年6月14日 Environmental Impact of PhosphogypsumDerived Building Materials MI RomeroHermida 1 , V FloresAlés 2, *, SJ HurtadoBermúdez 3 , A Santos 4 andEnvironmental Impact of PhosphogypsumDerived Building 2023年8月25日 Environmental Impact and Concerns Calcite, like many minerals, can have both positive and negative environmental impacts depending on how it is utilized and how its interactions with the environment are managed Here are three environmental concerns related to calcite: 1 Acid Rain and Calcite Dissolution: Calcite is sensitive to acidic Calcite : Properties, Formation, Occurrence and Uses Areas
Dynamics of contaminants in phosphogypsum of the fertilizer industry
2010年5月1日 In Spain, the production of H 3 PO 4, and hence of phosphogypsum, is restricted to a large fertilizer industrial complex situated in Huelva city (SW Iberian Peninsula)These fertilizer facilities commonly deal with phosphate ore from Morocco Over 3 Mt of phosphogypsum wastes are produced each year and deposited in a stack located less than 1 km away from the 2017年8月21日 The general features of ore deposits in the epithermal environment are influenced by their tectonic, magmatic and geologic associations Geologic variability means that there is a wide variation (PDF) Epithermal ore deposits: Firstorder features relevant to 2023年2月5日 Phosphogypsum (PG) waste is a byproduct generated from wetprocess phosphoric acid (H3PO4) manufacturing during phosphate rock decompositionEffective and innovative procedures to use phosphogypsum 2023年7月1日 Phosphogypsum (PG) and phosphorus ore flotation tailings (POFT) are generated in the phosphorus chemical industry, where stockpiling PG and POFT causes serious pollution to the environment In this study, a novel adsorbent material (ie, PGTA) was prepared in proportion to PG, POFT and starch to remove phosphate from the aqueous solutionReuse of phosphogypsum and phosphorus ore flotation tailings
Environmental impact of phosphogypsum stockpile in Springer
2016年2月2日 From 1979 to 1989, ten million tons of phosphogypsum, a waste byproduct of the Greek phosphate fertilizer industry, was disposed into an abandoned limestone quarry in Schistos former waste site, Piraeus (Greece) The quarry has been recently closed and remediated using geomembranes and thick soil cover with vegetation A part of the deposited phosphogypsum 2023年2月18日 Phosphogypsum (PG) waste is a byproduct generated from wetprocess phosphoric acid (H3PO4) manufacturing during phosphate rock decomposition Worldwide, the annual production of PG ranges between 100 and 300 million tons, with only a few quantities utilized in several application domains (about 15%), the unused PG is usually discharged into Effective and innovative procedures to use phosphogypsum 2019年4月25日 Hydrothermal fluid flow along fault zones in the Harz Mountains led to widespread formation of economic veintype Pb–Zn ore and Ba–F deposits during the Mesozoic We reconstruct the fluid flow system responsible for the formation of these deposits using isotope ratios (δ2H and δ18O) and anion and cation contents of fluid inclusions in ore and gangue Fluid evolution and ore deposition in the Harz Mountains 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
A new approach to determine the phosphogypsum spread from
2013年10月15日 The presented investigation was performed on a PG deposition site in Croatia A new approach in the determination of the spread of PG particles from the deposition site into the environment based on the PG particle radioactivity measurements is suggested and explained2019年9月1日 The radiochemical results indicate that 238 U, 226 Ra and 210 Pb initially present in PG waste, were more easily transferred to and enriched in the solid phase of Ca(OH) 2 with an activity Recovery of Ca(OH)2, CaCO3, and Na2SO4 from Moroccan phosphogypsum Discussion Banded ore deposition during the sulfide stage Fluid mixing The Mesozoic sulfide mineralization stage was of major H2Sbearing environment Hence, the deposition of sulfides is assumed to result from the mixing of the As for banded ore calcite, the calculated temperatures range from 58 to 79 °C using the (PDF) Fluid evolution and ore deposition in the Harz Mountains 2005年10月1日 Download Citation The Environment of Vein Formation and Ore Deposition in the PurisimaColon Vein System, Pachuca Real del Monte District, Hidalgo, Mexico The Pachuca Real del Monte district The Environment of Vein Formation and Ore Deposition in the
Characterization of phosphate rock and phosphogypsum from
2018年5月1日 To better understand the dynamic and behavior of phosphate/phosphogypsum contaminants from raw ores to marine environment, a chemical, organic, mineralogical, and morphological characterization of