Application of slag from thermal power plant for the production of porous filler

2021 ◽  
Vol 6 (2) ◽  
pp. 110-116
Author(s):  
Ihor Mitin ◽  
◽  
Diana Kindzera ◽  
Volodymyr Atamanyuk ◽  
◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Raw Materials ◽  
Thermal Power ◽  
Raw Material ◽  
Drying Process ◽  
Filtration Method ◽  
Porous Filler

The article is devoted to obtaining a porous filler from the slag of the Thermal Power Plant and investigation of the filtration method for the drying of slag and clay as main raw materials for preparing the charge for porous filler production. The possibility of using TPP slag as the raw material for the production of porous filler has been proved. The main benefits of using such wastes in the production process are environmental protection, conservation of raw resources for the production of finished products. According to the results of the research, insignificant values of the pressure drop confirm the application feasibility of the filtration drying as an energy-saving method of the drying of slag and clay for preparing the charge for porous filler production. The influence of the temperature of the drying agent in the range from 313 to 373K on kinetic during filtration drying of slag and clay has been established. Obtained results are useful for the organization and intensification of the filtration drying process of slag and clay as the preliminary stage at the porous fillers production line. The qualitative new porous filler with the bulk density of 230 kg/m3, the specific heat of 0,82 kJ/kg∙K, the thermal conductivity of 0,067 W/m∙K and compressive strength of 27,7 MPa has been obtained which can be used for the production of lightweight concretes.

Compressive Strength and Density of Cementless Unfired Lightweight Brick Utilizing Coal Ash from Coal-Fired Thermal Power Plant

2013 ◽  
Vol 594-595 ◽  
pp. 527-531
Author(s):  
Mohamad Ezad Hafez Mohd Pahroraji ◽  
Hamidah Mohd Saman ◽  
Mohamad Nidzam Rahmat ◽  
Kartini Kamaruddin ◽  
Ahmad Faiz Abdul Rashid
Keyword(s):  
Compressive Strength ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Bottom Ash ◽  
Coal Ash ◽  
Hydrated Lime ◽  
Raw Material ◽  
The World ◽  
Blastfurnace Slag

Millions tons of coal ash which constitute of fly ash and bottom ash were produced annually throughout the world. They were significant to be developed as masonry brick to substitute the existing widely used traditional material such as clay and sand brick which were produced from depleting and dwindling natural resources. In the present study, the coal ash from coal-fired thermal power plant was used as the main raw material for the fabrication of cementless unfired lightweight brick. The binder comprising of Hydrated Lime (HL)-activated Ground Granulated Blastfurnace Slag (GGBS) system at binding ratio 30:70, 50:50 and 70:30 were used to stabilize the coal ash in the fabrication process of the brick. Foam was used to lightweight the brick. The compressive strength and ambient density were evaluated on the brick. The results indicated that the brick incorporating HL-GGBS system achieved higher strength of 20.84N/mm2 at 28 days compare to the HL system with strength of 13.98N/mm2 at 28 days. However, as the quantity of foam increase at 0%, 25%, 50%, 75% and 100%, the strength and density for the brick decreased.

FLY ASH FROM THERMAL POWER PLANT, RAW MATERIAL FOR GLASS-CERAMIC

2013 ◽  
Vol 12 (2) ◽  
pp. 337-342 ◽  
Author(s):  
Firuta Goga ◽  
Roxana Dudric ◽  
Calin Cormos ◽  
Florica Imre ◽  
Liliana Bizo ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Glass Ceramic ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Raw Material ◽  
Plant Raw Material

Supplier Selection Criterion for SSCM in Indian Thermal Power Plant

2019 ◽  
pp. 240-257
Author(s):  
Suchismita Satapathy
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Selection Criterion ◽  
Raw Material ◽  
Thermal Power Plants ◽  
Whole Process ◽  
Main Motive

All companies are dependent on their raw material providers. The same applies in the case of thermal power plants. The major raw material for a thermal power plant is the coal. There are a lot of companies which in turn provide this coal to the thermal power plant. Some of these companies are international; some are local, whereas the others are localized. The thermal power plants look into all the aspects of the coal providing company, before settling down for a deal. Some people are specifically assigned to the task of managing the supply chain. The main motive is to optimize the whole process and achieve higher efficiency. There are a lot of things which a thermal power plant looks into before finalizing a deal, such as the price, quality of goods, etc. Thus, it is very important for the raw material providers to understand each and every aspect of the demands of the thermal power plant. A combination of three methods—Delphi, SWARA, and modified SWARA—has been applied to a list of factors, which has later been ranked according to the weight and other relevant calculations.

Effect of Borax on Lightweight Material from Cullet and Fly Ash

2016 ◽  
Vol 690 ◽  
pp. 109-113 ◽  
Author(s):  
Sutthima Sriprasertsuk ◽  
Phatthiya Suwannason ◽  
Wanna T. Saengchantara
Keyword(s):  
Thermal Conductivity ◽  
Heat Treatment ◽  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Silicate ◽  
Raw Materials ◽  
Raw Material ◽  
Test Results ◽  
Heat Process ◽  
Lightweight Material

This work investigated the recycling of fly ash waste and cullet as the raw materials for lightweight bodies produced by heat treatment and using sodium silicate as the binder. Borax was mixed with fly ash and cullet, and put into the block in dimension 10x10x2 cm3. The lightweight materials thus produced were then sintered at temperature of 800 °C. Density, compressive strength and thermal conductivity were determined. Borax showed a positive sintering effect on the porosity of lightweight material during the heat process. The compressive strength of lightweight material diminished with the reduction of density and thermal conductivity. Lightweight material manufactured with borax showed the lower density and thermal conductivity accompanied by the higher compressive strength. The test results indicated that using fly ash and cullet as the raw material with borax could obtain the lightweight material, thus enhancing the possibility of its reuse in a sustainable way.

Physical Properties and Microstructure of the Fly Ash Based-Geopolymer/Granule Composites

2014 ◽  
Vol 680 ◽  
pp. 54-60
Author(s):  
Ji Hwan Won ◽  
Seung Gu Kang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Power Plant ◽  
Crystalline Phase ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Molding Pressure ◽  
Recycling Rate ◽  
Hand Tapping ◽  
Geopolymer Composites

In this research, the fly ash (F/A) discharged from a thermal power plant was recycled to manufacture geopolymer containing granules instead of sand. Several types of granules using fly ash were assessed. The properties of the geopolymer/granule composites were analyzed as a function of the crystalline phase and size of the granules, as well as the molding pressure. The compressive strength and density of the geopolymer composites containing the hydrated granules fabricated by hand-tapping were 5.7 MPa and 1.47 g/cm3, respectively, while composites created by pressure molding were 15.6 MPa and 1.73 g/cm3. These results are comparative or superior to those of commercial cement bricks (8 MPa according to KS F 4004). Therefore, the geopolymer/granule composites fabricated in this study can be applied to cement bricks and can be a base for the enhancement of the recycling rate of fly ash.

scholarly journals Bio-Energetics and Utilization of Greenhouse Gases

10.12737/4938 ◽  
2014 ◽  
Vol 3 (3) ◽  
pp. 25-27 ◽  
Author(s):  
Хазанов ◽  
Grigoriy Khazanov ◽  
Курин ◽  
Valeriy Kurin ◽  
Апарушкина ◽  
...  
Keyword(s):  
Power Plant ◽  
Greenhouse Gases ◽  
Solid Fuel ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Hydrocarbon Fuel ◽  
Raw Material ◽  
Biofuel Production ◽  
Algae Biomass ◽  
Microalgae Biomass

The paper considers environmental problems of hydrocarbon fuel usage. The assessment of the area necessary for cultivation of algae biomass and its further use as solid fuel at thermal power plant has been carried out. Expediency of production of microalgae biomass in the process of photosynthesisas raw material for biofuel production is revealed.

scholarly journals Potential usage of fly and bottom ash from thermal power plant ”Nikola Tesla” landfill, Serbia

2012 ◽  
Vol 66 (3) ◽  
pp. 403-412 ◽  
Author(s):  
Miodrag Zivotic ◽  
Dragoslava Stojiljkovic ◽  
Aleksandar Jovovic ◽  
Vladica Cudic
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Raw Material ◽  
Steel Mill ◽  
Waste Discharge ◽  
Nikola Tesla ◽  
Cement Mixture

In Serbia, the ash from power plants has long been labelled as hazardous waste. With the adoption of the appropriate legislation this ash became secondary raw material with the potential usage. In this paper an analysis of the fly and bottom ash composition, which are disposed of in the power plant ?Nikola Tesla A? landfill, is presented. Thirty samples, divided into three sets, were analyzed for trace elements As, Ba, Be, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Ti, V and Zn. The first and second set of samples were taken at the depth of 0.0-0.6 m, from cassette III, at the place of waste discharge (set I) and in the centre of the cassette (set II).The third set of samples was taken from the same cassette spot but at the different depth. The estimated variations in quality within individual sets, as well as the comparison between sets I and II, were done. The repeatability of results by the depth of cassette (set III) was also analyzed. The mixture consisting of 79.4% limestone, 17% clay, 0.5% sand, 0.55% iron ore, 0.55% from steel mill waste and 2% ash from the thermal power plant "Nikola Tesla A" was adopted as the reputable mixture for cement making. For concrete making, the same cement mixture was used but with 2.1% of the same ash material added. The results showed possibility of further fly and bottom ash use as the cement and concrete material.

scholarly journals Science-Based Procedure for Designing Tubular Porous Cooling Systems for Thermal Power Plant Equipment Components

2019 ◽  
pp. 89-106
Author(s):  
A.A. Genbach ◽  
D.Yu. Bondartsev
Keyword(s):  
Thermal Conductivity ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
High Heat ◽  
Short Exposure ◽  
Cooling Systems ◽  
Heat Flows ◽  
Power Plant Equipment ◽  
Plant Equipment

We investigated critical heat flux phenomena in metallic and porous structures characterised by low thermal conductivity. These structures are used to cool various thermal power plant equipment; their operation involves both gravity and capillary forces. The paper describes the failure mechanism in metallic steam generator surfaces and poorly thermally conductive low-porosity coatings made of natural mineral media (such as granite). We determined how heat flows depend on their duration and penetration depth of thermal disturbance. Tubular porous systems are less bulky and feature high intensity, higher thermal conductivity and reliability. We show that for granite coatings the maximum thickness of the particles detached due to compression forces is (0.25...0.3)·10--2 m. The compression curve sections that govern detachment of particles larger than 0.3·10--2 m are shadowed by the melt curve for high heat flows and short exposure times and by the tension curve in the case of low heat flows and short periods of time. The investigation should help us to design porous coatings usable in cooling systems.

scholarly journals Рroduction of light fillers on the basis of technogenic raw materials

2021 ◽  
Vol 4 (1) ◽  
pp. 131-137
Author(s):  
D. P. Kindzera ◽  
◽  
V. M. Atamaniuk ◽  
Z. Ya. Gnativ ◽  
I. M. Mitin ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Raw Materials ◽  
Thermal Power ◽  
Drying Process ◽  
Technological Parameters ◽  
Transfer Coefficients ◽  
Filtration Method ◽  
Heat Transfer Coefficients ◽  
Velocity Effect ◽  
Technogenic Raw Materials

In Ukraine, along with the growing demand for tonnage production of light fillers, the need for raw materials is growing, considering that most of the range of light fillers is made from natural raw materials. Thus, a promising direction of utilization of TPP slags and coal concentrate obtained by enrichment of primary coal sludge is there involvement to the production process after preliminary drying. Drying of the thermal power plant slag and the coal concentrate, which are hydraulic mixtures, by the filtration method will reduce energy consumption due to the displacement and removal of significant amount of moisture by the moving thermal agent due to the pressure drop. The results of studies of the thermal agent velocity effect on the drying process duration of TPP slag and coal concentrate, as well as the obtained values of heat transfer coefficients at different velocities of the thermal agent for TPP slag α = 40 ÷ 112 and coal concentrate α = 92,5 ÷ 294 will allow to calculate energy consumption and scientifically substantiate the optimal technological parameters for intensification of the drying process of the charge components for porous fillers production.

Bottom Ash from Mineral Coal as Aggregatein Mixtures for Ceramic Products

2014 ◽  
Vol 798-799 ◽  
pp. 599-604
Author(s):  
Nancy E. Quaranta ◽  
Marta G. Caligaris ◽  
Miguel A. Unsen ◽  
Hugo A. López ◽  
Gisela G. Pelozo
Keyword(s):  
Power Plant ◽  
Optical Microscopy ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Bottom Ash ◽  
Waste Material ◽  
Raw Material ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Thermally Treated

The objective of this work is to analyze ashes from a thermal power plant with the aim of determining its environmental aptitude for reutilization as aggregates in clay mixtures for ceramics production. To achieve this objective the waste material was characterized by different techniques: optical microscopy, scanning electronic microscopy, conductivity, pH, among others. Clay samples with bottom ash addition, up to 50%, were prepared. These samples were thermally treated at 950oC and then characterized with diverse techniques in order to determine their behaviour in service. The obtained results show the high feasibility of reutilization of the studied waste as raw material in the production of ceramic products.

Sign in / Sign up

Export Citation Format

Share Document