Efficient removal of phosphate impurities in waste phosphogypsum for

Phosphogypsum PG is an industry solid waste produced from phosphoric acid manufacture To reduce environmental pollution of the PG H 2 C 2 O 4 was employed to purify it which then can be used for cement production The optimal concentration of H 2 C 2 O 4 for PG purification was determined In addition differential thermal analysis DTA X ray photoelectron spectroscopy XPS and X ray

Materials Free Full Text Strength Prediction of Ball Milling

Phosphogypsum is an industrial byproduct from the wet preparation of phosphoric acid Phosphorus building gypsum can be obtained from phosphogypsum after high thermal dehydration This study aimed to analyze the influence of ball milling with different parameters on the strength of phosphorus building gypsum In this paper the absolute dry flexural strength and the absolute dry compressive

Effect of Ball Milling Time on the Performance of Phosphorous Hindawi

The use of phosphogypsum to prepare phosphorus building gypsum PBG is of great value to the resource utilization of phosphogypsum In this study PBG was ball milled to obtain phosphorus building gypsum with good performance which can meet the requirements of the Chinese standards for first class building gypsum Meanwhile the changes of net slurry physical properties mechanical

Phosphogypsum Based Concrete Engineering Characteristics And Miami

In this study the engineering characteristics of concrete mixtures containing dihydrate phosphogypsum a by product of the wet phosphoric acid industry is investigated Phosphogypsum based concrete mixtures consolidated by impact compaction external high frequency vibration or static compaction are studied in unconfined compression splitting tension and bending and the results are

Strength Properties of Phosphogypsum Based Composite SpringerLink

Hou et al used phosphogypsum and slag cement to carry out the experimental study of phosphogypsum base polymer and achieved good results but the high economic cost of low gelling materials limited the extensive use in the process of mine filling In this paper orthogonal experiments were carried out on the gypsum based composite cementitious

Ajam L Ben Ouezdou M Felfoul and Mensi 2024

Ajam L Ben Ouezdou M Felfoul and Mensi 2024 Characterization of the Tunisian Phosphogypsum and Its Valorization in Clay Bricks Construction and

An effective treatment method for phosphogypsum SpringerLink

the resource utilization of phosphogypsum pg has been studied by numerous papers and the results of those studies show that pg can be used as raw materials for the preparation of finer aggregates supplementary cementitious materials or the mine backfill cement mortar bricks and whisker chen et al 2024 wang et al 2024 li et al 2024 …

Cement Brick Machine Market Share and Growth Research 2024 Recent

Cement Brick Machine Market Report provides analysis of exclusive market size market share growth trends industry demand and developments business growing strategies and CAGR status of top

NOPR Production of Beneficiated Phosphogypsum for Cement Manufacture

The techno economic feasibility of beneficiating phosphogypsum has been highlighted The beneficiated phosphogypsum was used for making portland cement and portland slag cement The results favour use of phosphogypsum as an additive to cement clinker in place of natural gypsum Page s 533 537 ISSN 0975 1084 Online 0022 4456 Print

1、Baoguo Ma Zihao Jin Ying Su et al Utilization of hemihydrate phosphogypsum for the preparation of porous sound absorbing material [J] Construction and Building Materials 2024 234 117346 Ying Su et al Effect of calcium sulphoaluminate cement on mechanical strength and waterproof properties of beta hemihydrate phosphogypsum [J

Preparation of high performance lightweight materials based on the

The pretreatment of phosphogypsum is mainly to calcine at high temperature the gradient of an H 2 O 2 foaming agent affected the mechanical characteristics of a binary concrete system based on PG was explored based on the optimum mix ratio of PG and inorganic substance to formed four different binary concrete systems The experimental results

Ep 4087818 A1 20221116 Integrated Method for Producing Sulphur

The integrative approach as a total concept from phosphogypsum to cement clinker and sulphur dioxide takes into consideration the requirements in an existing phosphoric acid and sulphuric acid complex [origin WO2021140076A1] The invention relates to a method for producing sulphuric acid and cement clinker using calcium sulphate which is

IJERT Investigation on Utilization of Phosphogypsum as a Partial

IJERT Investigation on Utilization of Phosphogypsum as a Partial Replacement of Cement in Concrete International Journal of Engineering Research and Technology IJERT 2024 IJERT Journal

Phosphogypsum potential uses and problems a review

The concentrations of these elements vary between the regions and the processes used all of which require particular and specific follow up after the release of PG and during its

IL26076A Method for the manufacture of phosphoric acid and calcium

239000004568 cement Substances description 1 238000010908 decantation Methods description 1 C04B11/26 — Calcium sulfate cements strating from chemical gypsum starting from phosphogypsum or from waste purification products of smoke C

Use of Mixture Design Approach for the Optimization and SpringerLink

Place the cementitious components CC Portland cement fly ash silica fume and purified phosphogypsum into the mixing drum turn on the mixer and allow it to mix the cementitious components together for 1 min in a container 2 Add water W with W/CC ratio of and mix for 30 s at low speed 3

Application Prospects of Phosphogypsum in the Production of

The common practice is to pretreat phosphogypsum to obtain dihydrate gypsum with stable properties and satisfactory impurity content and then use it as post adding gypsum to produce sulfoaluminate cement Obviously the effect of impurities in phosphogypsum from different sources will be different

Treating waste phosphogypsum for cement and plaster manufacture

In the investigation reported in this paper treatment of phosphogypsum with aqueous citric acid solution was attempted to purify phosphogypsum and improve its quality to make it fit for manufacture of cement and gypsum plaster for the first time The treatment of gypsum converts phosphatic and fluoride impurities into water removable citrates aluminates and ferrates

Phosphogypsum for Secondary Road Construction

01 033 077Final Phosphogypsum is a by product of the phosphate fertilizer industry Its main constituent is calcium sulfate dihydrate According to recent statistics the phosphate industry in Central Florida annually produces 33 million tons of phosphogypsum and has over 500 million tons stockpiled

The Effect of Granulated Fly Ashes with Phosphogypsum on the Hardening

The addition of a 4% share of phosphogypsum to the cement does not therefore constitute a danger to human health when this material is used in construction The moisture levels of phosphogypsum ranged from % to % The hydrated material was heat treated

Groups challenge EPA rule allowing roads built with gypsum waste

A pile of phosphogypsum waste is seen at the Mosaic Uncle Sam fertilizer plant in St James Parish on Wednesday February 6 2024 Environmental and union groups are challenging an Environmental

Phosphogypsum Wikipedia

The construction industry is the number one user of phosphogypsum in 2024 with Mt used as concrete set retarder and Mt used in drywall [10] It is also used as a chemical feedstock for producing sulfates and as a soil conditioner similar to regular gypsum [11]

Effect of Phosphogypsum on the Properties of Portland Cement ResearchGate

The material has therefore tried to incorporate in cement manufacturing considering its sustainable use Phosphogypsum could be used as a substitute of natural gypsum in the production

Phosphogypsum calcium sulfate K2SO4 SOP MOP KCL mineral double roller

Processing Briquetting Phosphogypsum calcium sulfate K2SO4 SOP MOP KCL mineral double roller compacting ore briquette machine in Changzhou China ‹ ›

PDF Cumhuriyet Science Journal CSJ

and cylinder compressed concrete [9 10] Phosphogypsum can be improved by fly ash with thermal power plant waste that other industrial waste and Portland cement for possible use in soil

Thermal dehydration kinetics of phosphogypsum Consejo Superior de

Before the use of phosphogypsum in the cement production as setting regulator is necessary to do a thermal study to avoid the false setting by the production of hemihydrate and anhydrate phases The mineralogical composition of Spanish phosphogypsum PGS was approximately of 64% of CaSO 4 ·2H 2 O 33% CaSO 4 · 2 O and 3% of CaSO 4

UG Mat Sulfate Wastes Recycled Materials Resource Center

Recycling Phosphogypsum is a calcium sulfate hydrate that is pumped into ponds eventually dewatered and ultimately disposed of in large stockpiles called stacks Phosphogypsum has been recovered and reused with some success in stabilized road bases 4 unbound road bases 5 and roller compacted concrete

A Study on Strength Characteristics of Phosphogypsum Concrete

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PDF IRJET Investigation work on Replacing cement partially by

Phosphogypsum is strong in the production of phosphoric acid which is a major component of many fertilizers the chemical industry To protect the environment many efforts are being made to use a variety of solid waste to use it in concrete

Utilisation of Water Washing Pre Treated Phosphogypsum for Cemented

Recycling phosphogypsum PG for cemented paste backfill CPB has been widely used at phosphate mines in China However the impurities in PG prolong the setting time and reduce the uniaxial compressive strength UCS limiting the engineering application of PG This paper aims to investigate the feasibility of treated PG TPG washed repeatedly using deionised water DW for CPB A water