The possibility of applying lime neutralized phosphogypsum as a raw material for obtaining anhydrite binder was investigated in this paper. The effect of the calcination
Consulta
· Phosphogypsum (PG), as a bulk industrial solid waste with high and complicated impurities content, makes it difficult to be utilized. In this paper, raw PG by adding the soluble phosphorus (P 2 O 5) and fluorine (F) content of 0–1.5 wt% was used to prepare anhydrite with calcination treatment method, and the influence of P 2 O 5 and
Consulta
· Flue gas desulfurization gypsum (FGD gypsum) is obtained from the desulphurization of combustion gases in fossil fuel power plants. FGD gypsum can be used to produce anhydrite binder. This research is devoted to the investigation of the influence of the calcination temperature of FGD gypsum, the activators K2SO4 and Na2SO4, and
Consulta
A possibility to use an unwashed, lime neutralized waste phosphogypsum-dihydrate calcium sulphate was analyzed in order to obtain an anhydrite binding material. Influence of calcination temperature on the properties of the obtained material was analyzed. It was determined that phosphoanhydrite calcined at 800°C temperature is characterized by
Consulta
The phosphogypsum – dihydrate calcium sulphate is waste material of phosphoric acid production from the Kola apatites. The possibility of applying lime neutralized phosphogypsum as a raw material for obtaining anhydrite binder was investigated in this paper. The effect of the calcination temperature and of following additives: dust from a
Consulta
· Semantic Scholar extracted view of "Study on anhydrite plaster from waste phosphogypsum for use in polymerised flooring composition" by Manjit Singh et al. DOI: 10.1016/J.CONBUILDMAT.2004.04.038 Corpus ID: 135724319 Study on
Consulta
The formed specimens from this composition of the anhydrite binder calcined at the temperature 900 C reach the early compressive strength -13.14 MPa after 3 days. View in full-text Citations
Consulta
· The anhydrite binder calcined with the addition of 5% ground glass exposes the best physical and mechanical properties: the setting duration up to 13-38 min, the compressive strength of the dry
Consulta
Anhydrite binder calcined from phosphogypsum Ceramics – Silikáty 54 (2) 152-159 (2010) 155was 9.1-9.2. The specific surface area was 1900 m2/kg. The cristabolite, the lisetite, the vaterite
Consulta
X-ray diffraction patterns of hydrated anhydrite binder: 1-1 mixture, 2-2, 3 mixtures, 3-4 mixture, 4-5 mixture. Composition of mixtures is reported in Table 1. Indexes: A-anhydrite CaSO4; G-gypsum CaSO4·2H2O; E-gismondite CaAl2Si2O8·4H2O; H-calcium aluminium silicate hydrate Ca2Al2SiO7·8H2O-"ANHYDRITE BINDER CALCINED
Consulta
· Abstract. The preparation of β-hemihydrate gypsum is an important approach for large-scale utilization of phosphogypsum (PG) because of the simple production technology by calcination. However, the dehydration behaviour and impurity change during the transformation of PG to β-hemihydrate gypsum at low temperatures
Consulta
· Anhydrite binder calcined from phosphogypsum[J] Ceramics, 2 (2010), pp. 152-159 Google Scholar [50] I.V. Fornés, D. Vaičiukynien ė, D. Nizevičienė, et al. A comparative assessment of the suitability of phosphogypsum from different origins
Consulta
Corpus ID: 168164841 ANHYDRITE BINDER CALCINED FROM PHOSPHOGYPSUM @inproceedings{Lekeviien2010ANHYDRITEBC, title={ANHYDRITE BINDER CALCINED FROM PHOSPHOGYPSUM}, author={Violeta Le{\vs}kevi{\vc}ienė and Dalia Nizevi{\vc
Consulta
The possibility of applying lime neutralized phosphogypsum as a raw material for obtaining anhydrite binder was investigated in this paper. The effect of the calcination temperature and of following additives: dust from a cupola furnace, ground glass and clay on the properties of obtained product was studied.
Consulta
: Rodrigo H. Geraldo, Rodrigo H. Geraldo, Ana Rita D. Costa, Julia Kanai, Jefferson S. Silva, Janaína · Calcination can reduce the soluble and co-crystal P 2 O 5 content of Phosphogypsum (PG). Ⅱ-anhydrite calcined from PG at 800 ºC had the best
Consulta
· The anhydrite. binder calcined with the addition of 5% ground glass exposes the best physical and mechanical properties: the setting. duration up to 13-38 min, the compressive strength of the dry samples is 30.74 MPa. INTRODUCTION. Anhydrite cement is largely applied in the construction.
Consulta
Anhydrite binder calcined from phosphogypsum Article Full-text available Jan 2010 Violeta Leškevičien ė Dalia Nizeviciene The phosphogypsum – dihydrate calcium sulphate is waste material of
Consulta
Calcination of FGD gypsum at a temperature range of 500–750 C and the use of soluble activators enabled the production of a high-performance anhydrite binder [28,29]. The FGD gypsum calcined at 650 °C for 4 h was used in the mixture of Portland cement to produce self-levelling floors [ 30 ].
Consulta
The anhydrite binder calcined with the addition of 5% ground glass exposes the best physical and mechanical properties: the setting duration up to 13-38 min, the compressive strength of the dry samples is 30.74 MPa.
Consulta
FT-IR spectrum of the anhydrite binder calcined at 800 and 900ºC.-"ANHYDRITE BINDER CALCINED FROM PHOSPHOGYPSUM" Skip to search form Skip to main content Skip to account menu Semantic Scholar's Logo Search 213,359,822 papers from all
Consulta
· The hydration process of RM-PG non-calcined free cementitious binder is as follows: RM, PG, GBFS, and FA (if added) dissolve under an alkaline environment and produce Ca 2+, SO 4 2−, silicon and aluminum monomer in the liquid phase, continuously
Consulta
· This paper reports on the hydration and properties of composite binders with 20–70% blastfurnace slag and 50–70% calcium sulphate (commercial hemihydrate or waste anhydrite) cured for up to
Consulta
E-mail: [email protected]. Submitted March 31, 2006; accepted April 24, 2007. Keywords: Anhydrite, Phosphogypsum, Impurities, Hydration, Activators. A possibility to use an unwashed, lime neutralized waste phosphogypsum-dihydrate calcium sulphate was analyzed in order to obtain an anhydrite binding material.
Consulta
The paper presents a study of the hydration and hardening process of anhydrite binder,the activating mechanism of sulfate salt typed activator,and the modifying effects of anhydrite with slag through the determination of hydration rate,temperature-rising and ion concentration in liquid phase of anhydrite in combination with the macro-performance
Consulta
· To achieve this objective, phosphogypsum was calcined at 900–1000 C to anhydrite which was mixed with suitable chemical activators (alkali/alkaline earth hydroxides, sulphates, carbonates) and
Consulta
The anhydrite binder calcined with the addition of 5% ground glass exposes the best physical and mechanical properties: the setting duration up to 13-38 min, the compressive strength of the dry samples is 30.74 MPa.
Consulta
Anhydrite binder calcined from phosphogypsum Ceramics – Silikáty 54 (2) 152-159 (2010) 155was 9.1-9.2. The specific surface area was 1900 m2/kg. The cristabolite, the lisetite, the vaterite, the anorthite, the magnesite, the illite were identified in the X-ray
Consulta
ANHYDRITE BINDER MODIFIED BY ULTRA-DISPERSED SILTSTONE Yury TOKAREV1*, Grigory YAKOVLEV1, Zarina pozzolanic properties of the calcined siltstone, lime in the amount of 3% was introduced into
Consulta
This research is devoted to the investigation of the influence of the calcination temperature of FGD gypsum, the activators K2SO4 and Na2SO4, and their amount on the
Consulta
· Gypsum binders are energy-saving materials because calcination processes occur at significantly lower temperatures than they do with cement and lime, usually within a range of 135–180 C. For this reason fuel consumption will be lower and CO 2 emissions from gypsum manufacturing are minor.
Consulta
Trituradora de piedra vendida por proveedores certificados, como trituradoras de mandíbula/cono/impacto/móvil, etc.
OBTENER COTIZACIÓN