Effect of the composition of phosphorus-containing raw materials on glass formation in the Li2O-Li2SO4-P2O5 system

2008 ◽  
Vol 65 (3-4) ◽  
pp. 113-116
Author(s):  
A. V. Nosenko ◽  
V. I. Goleus ◽  
A. A. Amelina ◽  
O. V. Datsenko
Keyword(s):  
Glass Formation ◽  
Raw Materials ◽  
Phosphorus Containing ◽  
Effect Of The Composition ◽  
P2o5 System

Statistical Study of the Effect of the Composition on the Strength of Supersulphated Cements

2013 ◽  
Vol 1612 ◽  
Author(s):  
Y.B. Castillo-Sánchez ◽  
J.M. Almanza-Robles ◽  
J.I. Escalante-García
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Optimal Conditions ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Wide Range ◽  
Dense Matrices ◽  
Alkaline Activator ◽  
Furnace Slag ◽  
Effect Of The Composition

ABSTRACTSupersulphated cements (SSC) are environmentally friendly binders that incorporate several raw materials, including byproducts. A systematic study was considered opportune considering the wide range of formulations found in the literature. The effect of the type and proportioning of components in the strength of SC was investigated using the Taguchi method to optimize the experimental work and to define the optimal conditions. The factors were: [A] %blast furnace slag (82.5-90%), [B] CaSO4 - alkaline activator ratio (1:0, 3:1, 1:1, 1:3 and 0:1), [C] type of CaSO4 (5 types) and [D] type of alkaline activator (portland cement, Ca(OH)2, KOH and NaCO3 and 2 combinations of these). Pastes were prepared and characterized for up to 28 days at 20°C. In general, for all values of [A] the best strength was for levels of [C] at 3:1, followed by the 1:1 and 1:0 ratios. The optimal conditions using the 28 day strength consisted of [A]= 82.5%, [B]= 3:1, [C]= flyorgypsum and [D] = portland cement, which developed excellent strength from day one and 35MPa. X-ray diffraction showed ettringite and C-S-H formation from the early ages. The microstructures showed dense matrices of reaction products well bonded to partially reacted slag grains, which in some cases showed rims of hydration products.

scholarly journals UTILIZATION OF MINERAL RAW MATERIALS (INDUSTRIAL BYPRODUCTS) AND THEIR MIXTURES AS SOIL PH AMENDMENTS

2004 ◽  
Vol 36 (1) ◽  
pp. 43
Author(s):  
Κ. Σικαλίδης ◽  
Ν. Καραγιαννίδης
Keyword(s):  
Soil Ph ◽  
Raw Materials ◽  
Soil Amendments ◽  
Alkaline Soils ◽  
Alkaline Ph ◽  
Industrial Activities ◽  
Ph Values ◽  
Phosphorus Containing ◽  
Industrial Byproducts ◽  
By Products

Limestone, dolomitic stone, huntite, active magnesia and their mixtures as well as phosphorus containing gypsum, all by-products of various industrial activities, were investigated as soil amendments for acidic (pH 4.2 - 4.5) soils from Drama area, N. Greece and alkaline (pH 8.1 - 8.2) soils from Thermi area, N. Greece. Additions of 500 and 350 kg of the industrial by-products or their various mixtures tested, per 1000 sq.meters, improve the soil pH from the strong acidic area to 6.5- 7.5. Active magnesia increases the pH values above 8. Additions of 200 kg of mixtures of limestone and active magnesia per 1000 sq.meters, found to be able to increase the soil pH from 4.2 to around 6.5. These results were obtained within ten days from the day of application. Phosphorous containing gypsum, by-product of phosphoric fertilizers industry, was found to be able to decrease the soil pH from 8.1-8.2 down to 7.1. The results of this work suggest the possible use of the studied by-products as soil amendments for acidic and alkaline soils, respectively.

Glass formation in the PbBr2–PbCl2–PbF2–PbO–P2O5 system

2000 ◽  
Vol 270 (1-3) ◽  
pp. 278-282 ◽  
Author(s):  
Dongmei Zhu ◽  
Wancheng Zhou ◽  
Hongsheng Zhao
Keyword(s):  
Glass Formation ◽  
P2o5 System

Separation of concentrated acid and salt solutions in nanoporous media as the basis for a new technology of processing of phosphorus-containing raw materials

2016 ◽  
Vol 54 (13) ◽  
pp. 1221-1235 ◽  
Author(s):  
R. Kh. Khamizov ◽  
N. A. Tikhonov ◽  
A. N. Krachak ◽  
A. N. Gruzdeva ◽  
N. S. Vlasovskikh
Keyword(s):  
Raw Materials ◽  
New Technology ◽  
Salt Solutions ◽  
Nanoporous Media ◽  
Phosphorus Containing

scholarly journals Conditions of receiving a phosphite as withdrawal – a by-product of production of nitrogen-phosphorus fertilizers

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Andrey Kochetkov ◽  
Natal’ya Shchegoleva ◽  
Sergey Korotkovskiy ◽  
Victor Talalai ◽  
Yury Vasilyev ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Raw Materials ◽  
Road Construction ◽  
Crystalline Hydrate ◽  
Limiting Factors ◽  
Vacuum Filtration ◽  
Phosphorus Containing ◽  
Local Roads ◽  
Effective Use ◽  
Extraction Phosphoric Acid

Application of a phosphite for construction of highways is expedient for economic and ecological reasons. Most effective use of a semi-hydrate form of a phosphite for construction of local roads. One of limiting factors of wide use of a phosphite in road construction is lack of due regulatory base. By production of extraction phosphoric acid on the Balakovo branch JSC Apatit the method of vitriolic decomposition of phosphorus-containing raw materials by sulfuric acid a lot of phosphoric acid with the subsequent division of the received phosphoric acid (a liquid phase) and educated crystalline hydrate of sulfate of calcium in a floor – or a digidratny form (a firm phase) on a vacuum filtration is used. Digidratny and semi-hydrate process of vitriolic receiving phosphoric acid along with two-phasic processes are the most economically effective processes.

scholarly journals Studies of precipitation during the decomposition process of phosphorus-containing compounds

2019 ◽  
Vol 80 (4) ◽  
pp. 312-315
Author(s):  
M. M. Ganbarov ◽  
M. M. Ataev ◽  
K. K. Gazvini
Keyword(s):  
Raw Materials ◽  
Environmentally Friendly ◽  
Decomposition Process ◽  
Second Stage ◽  
Phosphorus Containing ◽  
Neutralization Process ◽  
The Absolute ◽  
Two Stages ◽  
Kinetics Of

The kinetics of the process of using phosphorus-containing mineral compounds by their decomposition, which are actual problems, has been studied. At beginning of the it have been notified that the process takes place in two stages. These stages of the process are differed from each another mainly by rate of process realization, because a rate of the first stage is much more that a rate of the second stage. This fact is a reason of the deep research of kinetic of given process. Apart from that a detailed study of these processes connect with some problems of enter prices. All these question are analizied in the work, also the information by methodical carry out of experiments. Regime parameters correlation of components, concentrations of components, a time requite for realization of process are presented. The dependence of degree by different mass correlation of components from the time realization of process are also shown. In the work the types existence of precipitate, monitite brush it are shown. On base of received date a dissolubility of the base received product are graphically presented. In the work an influence of mass correlation of CaO?P2O5 and time of process realization on precipitation is studied. It have been determined that by 650C temperature a mass correlation of the base components must be equal to one, by that a time being used on neutralization process don’t play the practical role, because its increase and decrease don’t influence practically on process indices. The results shown that by equality of components CO?P2O5=1 correlation during four hours the precipitation degree makes up to 90,66 % and during 1 hour this index is 78,2 % for duringthe remaining three during this index is increased on 12 %. By using of these received data these is a possibility determination of the optimum technological conditions for given process. it is shown that there are opportunities to achieve processivization, to increase the use of raw materials and to obtain an environmentally friendly product with the introduction of regime parameters and component ratios in the absolute state.

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