Search results

1

Unburned carbon in the circulating fluidised bed boiler fly ash

100%

Kobyłecki R.

Chemical and Process Engineering

|

2011

|

vol. 32

|

issue 4

255-266

EN

The paper describes the results of various actions and industrial tests conducted in order to decrease the content of unburned carbon in the fly ash of a circulating fluidised bed combustor (CFBC). Several attempts to improve the situation were made and the effects of several parameters on the unburned carbon content in the fly ash were investigated (e.g. bed temperature, cyclone separation efficiency, fuel particle size distribution, boiler hydrodynamics, grid design, and fuel data). Unfortunately, no satisfactory solution to these problems was found. Probably, apart from attrition and char fragmentation, additional factors also contributed to the formation of unburned carbon in the CFBC fly ash.

2

The recovery of rare-earth metals from fly ash using alkali pre-treatment with sodium hydroxide

100%

Żelazny S., Świnder H., Jarosiński A., Białecka B., Żelazny S., Świnder H., Jarosiński A., Białecka B.

Gospodarka Surowcami Mineralnymi

|

2020

|

vol. 36

|

issue 3

3

Application of fly ash agglomerates in the sorption of arsenic

100%

Polowczyk I., Bastrzyk A., Koźlecki T., Rudnicki P., Sawiński W., Sadowski Z., Sokołowski A.

Polish Journal of Chemical Technology

|

2007

|

vol. 9

|

issue 2

37-41

EN

The scope of this contribution was to investigate in detail an application of fly ash adsorbent for the removal of arsenite ions from à dilute solution. The experiments have been carried out using fly ash from black coal burning power plant "Siersza" and brown coal burning power plant "Turów" (Poland), which was wetted, then mixed and tumbled in the granulator with a small amount of cement to increase the mechanical strength of agglomerates. The measurements of arsenic adsorption from the aqueous solution were carried out in the flask (with shaking), as well as in the column (with circulation), in order to compare two different methods of contacting waste with adsorbent. The adsorption isotherms of arsenic were determined for granulated material, using the Freundlich model. Kinetics studies indicated that the sorption follows a pseudo-first-order (PFO) model (Lagergren) and the Elovich-type model.

4

The evaluation of fertilizer obtained from fly ash derived from biomass

100%

Żelazny S. E., Jarosiński A.

Gospodarka Surowcami Mineralnymi

|

2019

|

vol. 35

|

issue 2

5

Co-combustion of solid recovered fuel (SRF) and coal and its impact on fly ash quality

88%

Ściubidło A., Nowak W.

Gospodarka Surowcami Mineralnymi

|

2018

|

vol. 34

|

issue 2

6

Synthesis of Na-LSX type zeolite from Polish fly ash

88%

Adamczyk Z., Cempa M., Białecka B., Adamczyk Z., Cempa M., Białecka B.

Gospodarka Surowcami Mineralnymi

|

2020

|

vol. 36

|

issue 3

7

Use of fly-ash for the production of hydraulic binding agents and for soil stabilisation

88%

Kołodziejczyk U., Ćwiąkała M., Widuch A., Kołodziejczyk U., Ćwiąkała M., Widuch A.

Gospodarka Surowcami Mineralnymi

|

2012

|

vol. 28

|

issue 4

8

Investigation of the distribution of chemical components in selected landfill layers and fly ash fractions

88%

Sambor A., Szymanek A.

|

vol. 33

|

issue 2

221-229

EN

The article concerns fly ashes generated from the combustion of hard coal and deposited on landfills. Investigation results describing fly ash taken from a combustion waste landfill are presented in the article. The investigation results indicate a possibility for combusting the coal reclaimed by separation from the fly ash and utilizing the remaining fly ash fractions.

9

Microstructural, electrical, thermal and tribological studies of copper-fly ash composites through powder metallurgy

88%

Thanga Kasi Rajan S., Narayanasamy P., Balaji A. N., Vettivel S. C.

Bulletin of the Polish Academy of Sciences: Technical Sciences

|

2018

|

issue 6

10

Unburned carbon in the circulating fluidised bed boiler fly ash

88%

Kobyłecki R.

Chemical and Process Engineering

|

2011

|

issue 4

11

Analysis of the Distribution of Chemical Compounds from Fly Ash Exposed to Weather Conditions

88%

Sambo A., Szymanek A.

Chemical and Process Engineering

|

2014

|

vol. 35

|

issue 3

265-275

EN

The paper presents investigation results of the migration of a chemical compound contained in fly ash deposited on a dry furnace waste landfill site exposed to weather conditions. Climate conditions are able to significantly affect chemical component distribution in a block of deposited, moving chemical compounds to different depths. The main aim of the investigations was to determine the chemical component distribution of deposited fly ash in the landfill. Identification of chemical components based on XRF analysis indicated the existence of differences in both tested storage layer and the fraction of fly ash.

12

Synthesis of pitiglianoit and tobermorite from fly ash originating from lignite combustion

88%

Białecka B., Adamczyk Z., Cempa M., Białecka B., Adamczyk Z., Cempa M.

Gospodarka Surowcami Mineralnymi

|

2019

|

vol. 35

|

issue 3

13

Use of fly ash and fly ash agglomerates for As(III) adsorption from aqueous solution

88%

Ulatowska J., Polowczyk I., Sawiński W., Bastrzyk A., Koźlecki T., Sadowski Z.

Polish Journal of Chemical Technology

|

2014

|

vol. 16

|

issue 1

21-27

EN

The objective of the present study is to assess the efficiency of fly ash and fly ash agglomerates to remove arsenic(III) from aqueous solution. The maximum static uptakes were achieved to be 13.5 and 5.7 mgAs(III)/adsorbent for nonagglomerated material and agglomerated one, respectively. Isotherm studies showed good fit with the Langmuir (fly ash) and the Freundlich (fly ash agglomerates) isotherm models. Kinetic studies indicated that the sorption of arsenic on fly ash and its agglomerates follows the pseudo-second-order (PSO) chemisorption model (R2 = 0.999). Thermodynamic parameters revealed an endothermic nature of As(III) adsorption on such adsorbents. The adsorption results confirmed that fly ash and its agglomerates can be used for As(III) removal from aqueous solutions. Fly ash can adsorb more arsenic(III) than agglomerates, which are easier to use, because this material is less dusty and easier to separate from solution.

14

The effects of mineralogical changes that occurin artificial aggregates

75%

Adamczyk Z., Grygierek M., Łupieżowiec M., Nowak J., Strzałkowska E.

Gospodarka Surowcami Mineralnymi

|

2018

|

vol. 34

|

issue 2

15

The characteristics of selected properties of the cenospheres - fraction of fly ash - by-product of coal combustion

75%

Haustein E., Quant B., Haustein E., Quant B.

|

issue 3

16

The Strength Behaviour of Transitional Group A-2-7 Soil Stabilised with Fly Ash and Lime Powder

75%

Ahmad O. A., Ahmad O. A.

Archives of Mining Sciences

|

2021

|

vol. 66

|

issue 4

17

Application of Acoustic Emission Method to Determine Critical Stress in Fibre Reinforced Mortar Beams

75%

Ranachowski Z., Daria J. N., Brandt A. M., Dębowski T.

Archives of Acoustics

|

2012

|

vol. 37

|

issue 3

18

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

75%

Thirumurugan S., Sivakumar A.

Archives of Civil Engineering

|

2013

|

issue 3

19

Effect of foundry sand and mineral admixtures on mechanical properties of concrete

75%

Krishna S. K. V. S. G., Ravitheja A., Sekhara R. T. C., Krishna S. K. V. S. G., Ravitheja A., Sekhara R. T. C.

Archives of Civil Engineering

|

2018

|

vol. 64

|

issue 1

20

Experimental investigations on punching shear of flat slabs made from lightweight aggregate concrete

75%

Gołdyn M., Krawczyk Ł., Ryżyński W., Urban T., Gołdyn M., Krawczyk Ł., Ryżyński W., Urban T.

Archives of Civil Engineering

|

2018

|

vol. 64

|

issue 4-I

Refine search results

Unburned carbon in the circulating fluidised bed boiler fly ash

The recovery of rare-earth metals from fly ash using alkali pre-treatment with sodium hydroxide

Application of fly ash agglomerates in the sorption of arsenic

The evaluation of fertilizer obtained from fly ash derived from biomass

Co-combustion of solid recovered fuel (SRF) and coal and its impact on fly ash quality

Synthesis of Na-LSX type zeolite from Polish fly ash

Use of fly-ash for the production of hydraulic binding agents and for soil stabilisation

Investigation of the distribution of chemical components in selected landfill layers and fly ash fractions

Microstructural, electrical, thermal and tribological studies of copper-fly ash composites through powder metallurgy

Unburned carbon in the circulating fluidised bed boiler fly ash

Analysis of the Distribution of Chemical Compounds from Fly Ash Exposed to Weather Conditions

Synthesis of pitiglianoit and tobermorite from fly ash originating from lignite combustion

Use of fly ash and fly ash agglomerates for As(III) adsorption from aqueous solution

The effects of mineralogical changes that occurin artificial aggregates

The characteristics of selected properties of the cenospheres - fraction of fly ash - by-product of coal combustion

The Strength Behaviour of Transitional Group A-2-7 Soil Stabilised with Fly Ash and Lime Powder

Application of Acoustic Emission Method to Determine Critical Stress in Fibre Reinforced Mortar Beams

Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

Effect of foundry sand and mineral admixtures on mechanical properties of concrete

Experimental investigations on punching shear of flat slabs made from lightweight aggregate concrete