The potential of fly ash-based calcium silicate as paper filler: Physical properties and printability

TAPPI Journal ◽  
2014 ◽  
Vol 13 (10) ◽  
pp. 49-57 ◽  
Author(s):  
SHUNXI SONG ◽  
MEIYUN ZHANG ◽  
ZHIRUN YUAN ◽  
JIAN WANG ◽  
JUNMIN SUN ◽  
...  
Keyword(s):  
Fly Ash ◽  
Calcium Carbonate ◽  
Physical Properties ◽  
Calcium Silicate ◽  
Power Plants ◽  
Low Cost ◽  
Paper Industry ◽  
Value Added ◽  
Surface Strength ◽  
Paper Filler

The development and application of low-cost and high-performance fillers by the paper industry is one of the most interesting aspects of filler technology. A novel calcium silicate, a byproduct, known as fly ashbased calcium silicate (FACS), from the value-added use of fly ash of coal-fired power plants, can be used as paper filler. To simulate the industrial papermaking process, a dynamic sheet former was used to evaluate the effect of FACS on the physical properties and printability of calendered paper. The results were compared with those of commonly used fillers, i.e., ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC). FACS-filled paper delivered a higher bulk than GCC-filled or PCC-filled papers at a given paper roughness. In addition, use of the original FACS exerted less influence on the tensile and tear strength of the filled paper. Printing quality tests indicated that at the same print density, the ink demand of FACS-filled paper was higher than that of GCC-filled or PCC-filled papers, but lower print through was obtained at the same amount of ink transferred to paper. The paper sheets containing the original FACS exhibited better surface strength than PCC-filled sheets. The results support the potential use of FACS as a low-cost filler for fine paper production.

Treatment of Coal Fly Ash And Its Environmentally Friendly Use In Rubber And Plastic Industry

2021 ◽  
Author(s):  
Zawar Hussain ◽  
Gao Lizhen ◽  
Wang Haitao ◽  
Tehreem Ayaz ◽  
Amir Zeb Khan
Keyword(s):  
Fly Ash ◽  
Calcium Carbonate ◽  
Barium Sulfate ◽  
Power Plants ◽  
Coal Fly Ash ◽  
Conveyor Belt ◽  
Plastic Waste ◽  
Talcum Powder ◽  
Coal Power Plants ◽  
Coal Power

Abstract Coal power plants are the major contributor of electricity but these power plants are also producing waste in the form of coal fly ash (CFA). However, it can cause high risk of environmental pollution and pulmonary diseases in humans. Plastic waste is also a problematic waste for many countries in terms of its reuse and recycling. Therefore, this study aims to reuse the waste product (CFA) of coal power plants in rubber conveyer belt instead of calcium carbonate or talcum powder and in recycling of plastic propylene as bonding filler material instead of barium sulfate to increase the durability of plastic products and reduce cost, CFA waste and plastic waste. For this purpose, CFA was treated by different pulverization techniques for the production of conveyor belt. The study found that the most favorable technique was shear based pulverization technique. Application of CFA with rubber was compared with two different chemicals (calcium carbonate and talcum powder) and found that the elongation at break of conveyor belt was 35% increased and abrasion volume was 64% reduced by using treated CFA. Furthermore, CFA was used in molten mass of plastic instead of barium sulfate and the results showed that the use of CFA has improved the dimensional stability of plastic material reducing the cost per ton by 2410 CNY. The study concluded that the performance was increased by applying CFA with a reduction in price as compared to other chemicals.

scholarly journals Bioremediation of Nitrite from Brackishwater Using Lignocellulosic Agricultural Waste – Bagasse

2007 ◽  
Vol 19 (4) ◽  
Author(s):  
KISHORE K. KRISHNANI ◽  
V. PARIMALA ◽  
B.P. GUPTA ◽  
I.S. AZAD ◽  
M.S. SHEKHAR
Keyword(s):  
Low Cost ◽  
Agricultural Waste ◽  
Paper Industry ◽  
Value Added ◽  
Raw Material ◽  
Suitable Alternative ◽  
Water Characteristics ◽  
Nitrite Removal ◽  
Sugar Mills ◽  
Aquaculture Water

Bagasse is a complex native lignocellulosic agricultural waste left after extraction of juice from sugar cane in sugar mills. Bagasse is commonly used as a captive boiler fuel aside from its minor use as a raw material in the paper industry and in low-value products. There remains an ever present need to convert this material to useful value added products, which is an objective of our continued research. The aim of the present study is to investigate four different materials prepared from bagasse for the removal of nitrite from shrimp farm brackishwater (salinity 27±1 ppt) in laboratory condition. The experimental results showed that nitrite removal is effective using bagasse materials with the dose of 1 and 3 g•L-1. Raw bagasse fiber was found to be most effective followed by dried bagasse powder, which can be attributed to the rapid increase in bacterial counts and periphytic growth combined with ion exchange mechanism. Effect of bagasse materials on other water characteristics such as pH, salinity, alkalinity, dissolved oxygen, ammonia and phosphates has also been studied. The very low cost of lignocellulosic materials is a real advantage that renders it as a suitable alternative for the remediation of nitrite from aquaculture water.

scholarly journals Evaluation of the Use of Fly Ash as a Low Cost Technology for Phosphorus Removal in Wastewater Treatment

2018 ◽  
Vol 13 (3) ◽  
pp. 1 ◽  
Author(s):  
Milena Emy Matsubara ◽  
Lúcia Helena Gomes Coelho
Keyword(s):  
Wastewater Treatment ◽  
Fly Ash ◽  
Removal Efficiency ◽  
Power Plants ◽  
Low Cost ◽  
Chemical Pollution ◽  
Synthetic Sample ◽  
Efficient Treatment ◽  
Pozzolanic Material ◽  
P Removal

“Pozzolan” is a slag from the burning of coal in power plants which has the potential to assist as a low-cost adsorbent for wastewater treatment. The excess of Phosphorus (P) in the environment can promote chemical pollution and harm ecosystems, especially water. It is therefore necessary to implement inexpensive techniques and processes for the efficient treatment of water and wastewater. In this context, this study evaluated the use of the pozzolanic fly ash material for P removal from wastewater for the development of low-cost treatment technologies for environmental restoration and remediation of water resources. The treatment systems were developed in batch configuration. The removal tests from a synthetic sample with a known concentration of P reached a maximum of 30% removal in concentration, even varying the pH and performing different treatments of the pozzolanic material. This low removal efficiency of Phosphorus led to a comparative test between different lots of pozzolan in order to verify if the results obtained were characteristic of the material itself or of the lot obtained. Also the P adsorption isotherms were constructed with the two lots achieving adsorption capacities from 0.87 mg g-1 to 74 mg g-1. This difference indicates that the low P removal efficiency in the preliminary tests is due to the characteristics of the substrate of the first lot. Tests on a real effluent using the pozzolan from the second sample lot indicated a 99% efficiency of P removal, with an initial concentration of Phosphorus in the effluent of 5.5 mg L-1.

Sintered Artificial Aggregate with New Correction Raw Materials

2015 ◽  
Vol 1124 ◽  
pp. 177-182
Author(s):  
Vit Cerný
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Raw Materials ◽  
Paper Industry ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Industrial Wastes ◽  
Raw Material ◽  
Waste Water Treatment Plant ◽  
By Products

Combustion of coal creates a high amount of by-products in heat power plants. The largest share occupies fly ash as solid mineral residuals. Global pressure grows currently for the use of energy by-products. Utilization as a raw material for production of artificial sintered aggregate is one of the ways to make optimal use of even low-quality fly ash. Environmental and economic reasons lead currently to trying to upgrade the technology, which will fully use of the principle of self-sintering process based on content of combustible substances.The amount of combustible substances is today increasing by coal as a primary and finite resource. There is also best way for utilization of industrial wastes that contain a suitable share of combustible substances for ensure the smooth running of sintering.The paper deals with laboratory verification of selected industrial wastes as a correction component in the sintered aggregate production technology. As an alternative raw materials were selected coal tailings, sludge from paper industry, sludge from waste water treatment plant and fly ash from municipal waste incineration plant. The aim of the study was to investigate the effect of corrective components to the quality of the resulting sintered aggregates.

scholarly journals Stabilization of B.C. Soil by Using Chemicals and Fly Ash

2021 ◽  
Vol 9 (VIII) ◽  
pp. 570-585
Author(s):  
Dhananjay B. Bawaskar
Keyword(s):  
Fly Ash ◽  
Calcium Carbonate ◽  
Zinc Chloride ◽  
Power Plants ◽  
Thermal Power ◽  
Calcium Sulphate ◽  
Black Cotton Soil ◽  
Experimental Program ◽  
Black Cotton Soils ◽  
Physical And Chemical

Black cotton soils are very susceptible to detrimental volumetric changes with changes in moisture. This behaviour of soil is attributed to the presence of mineral montmorillonite which has an expanding lattice. Black cotton soils because of their specific physical and chemical make are subjected to volume changes. In many countries including India, these soils are so extensive that alteration of highway routes to avoid the material is virtually impossible. Various remedial measures like soil replacement, prewetting, moisture control, lime stabilization etc. have been practiced with varied degrees of success. Extensive research is going on to find the solutions to Black cotton soils. Recent investigations on chemical stabilisation revealed that electrolytes like Calcium Sulphate, Calcium Carbonate, Zinc Chloride can be used in place of conventionally used lime, due to their ability to supply adequate cations. Fly ash is a waste by product from thermal power plants consuming thousands hectors of precious land for its disposal and also causing severe health and environmental hazards. This work presents the results of an experimental program undertaken to investigate the effect of Calcium Sulphate, Calcium Carbonate, Zinc Chloride and fly ash at different percentages on properties of black cotton soil. Atterbergs Limit of subgrade soil effect of addition of Fly Ash and Chemicals on CBR ,MDD ,OMC, From the results it is observed that 2% of Zinc Chloride and 12% of Fly ash improves the properties of black cotton soil as compared to Calcium sulphate & Calcium Carbonate. The conclusion drawn from this investigation is that a combination of 2% of chemicals and 12% of fly ash is more effective in improving the properties of black cotton soil.

scholarly journals Recent Advances in Methods for Recovery of Cenospheres from Fly Ash and Their Emerging Applications in Ceramics, Composites, Polymers and Environmental Cleanup

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1067
Author(s):  
Virendra Kumar Yadav ◽  
Krishna Kumar Yadav ◽  
Vineet Tirth ◽  
Ashok Jangid ◽  
G. Gnanamoorthy ◽  
...  
Keyword(s):  
Fly Ash ◽  
Mechanical Strength ◽  
Power Plants ◽  
Agricultural Land ◽  
Coal Fly Ash ◽  
Thermal Power ◽  
Value Added ◽  
Thermal Power Plants ◽  
Environmental Cleanup ◽  
High Mechanical Strength

Coal fly ash (CFA) is a major global pollutant produced by thermal power plants during the generation of electricity. A significant amount of coal fly ash is dumped every year in the near vicinity of the thermal power plants, resulting in the spoilage of agricultural land. CFA has numerous value-added structural elements, such as cenospheres, plerospheres, ferrospheres, and carbon particles. Cenospheres are spherical-shaped solid-filled particles, formed during the combustion of coal in thermal power plants. They are lightweight, have high mechanical strength, and are rich in Al-Si particles. Due to cenospheres’ low weight and high mechanical strength, they are widely used as ceramic/nanoceramics material, fireproofing material, and in nanocomposites. They are also used directly, or after functionalization, as an adsorbent for environmental cleanup—especially for the removal of organic and inorganic contaminants from wastewater. By utilizing this waste material as an adsorbent, the whole process becomes economical and eco-friendly. In this review, we have highlighted the latest advances in the cenospheres recovery from fly ash and their application in ceramics and wastewater treatment.

scholarly journals Study on the preparation and properties of talcum-fly ash based ceramic membrane supports

2020 ◽  
Author(s):  
Chao Cheng ◽  
Hongming Fu ◽  
Heng Zhang ◽  
Haiping Chen ◽  
Dan Gao
Keyword(s):  
Corrosion Resistance ◽  
Fly Ash ◽  
Flue Gas ◽  
Power Plants ◽  
Ceramic Membrane ◽  
Low Cost ◽  
Water Flux ◽  
Ceramic Membranes ◽  
Operating Conditions ◽  
Water Recovery

Abstract Ceramic membrane method for moisture recovery from flue gas of thermal power plants is of considerable interest due to its excellent selection performance and corrosion resistance. However, manufacturing costs of commercial ceramic membranes are still relatively expensive, which promotes the development of new methods of preparing low-cost ceramic membranes. In this study, a method for the preparation of porous ceramic membrane supports is proposed. Low-cost fly ash from power plants is the main material of the membrane supports, and talcum is the additive. The fabrication process of the ceramic membrane supports is described in detail. The properties of the supports were fully characterized, including surface morphology, phase composition, pore diameter distribution and porosity. Corrosion resistance and mechanical strength of the supports were measured. The obtained ceramic membrane support displays a pore size of about 5 µm and porosity of 37.8%. Furthermore, the water recovery performance of the supports under different operating conditions was experimentally studied. The experimental results show that, the recovered water flux varies with operating conditions. In the study, the maximum recovered water flux reaches 5.22 kg/(m2·h). The findings provide a guidance for the ceramic membrane supports application of water recovery from flue gas.

scholarly journals Application of Electro kinetic technique to remediate fly ash for its sustainable use

2020 ◽  
Vol 12 (4) ◽  
pp. 682-687
Author(s):  
Shristi Choudhary ◽  
N. Srinivas
Keyword(s):  
Fly Ash ◽  
Coal Combustion ◽  
Power Plants ◽  
Low Cost ◽  
Thermal Power ◽  
Sustainable Use ◽  
Voltage Gradient ◽  
Ph Values ◽  
Cost Treatment ◽  
Remediation Process

Fly ash is a by-product of coal combustion in thermal power plants which is classified as hazardous waste and a serious threat to environment. The study was conducted to determine the potential and examine the efficacy of electro kinetic technique (EKT) using variables like pH, total dissolved solids (TDS), e concentration of chlorides (Cl-), sodium (Na+),magnesium (Mg2+), potassium (K+), ammonia (NH3+) and calcium (Ca2+) on fly ash as a low-cost treatment for enhancing the use of fly ash in a more sustainable manner. The probability of removing heavy metals and chlorides from fly ash suspended in water using electro dialysis was studied as they are highly dependent on pH and conductivity of the fly ash. The voltage gradient and duration indicated significant effect in the change of pH values showing a range from 4.6 to 7.7 at cathode and anode respectively, while the Total dissolves solids (TDS) varying from 72.33±5.6 to 146±5.4 showed the enhanced availability of ions post electro dialysis. In terms of chlorides, Cl- the content was observed to be 265.06 mg/l which was high enough to cause corrosion problems in later stages of reuse of fly ash. The concentration of cations like Na+, K+, NH3+, Mg2+, Ca2+ were observed to be notably influenced by the duration of study and pH in electro dialysis. The experimental results of the study showed that the proposed technique based on the fundamentals of electro kinetics and dialysis could efficiently improve the remediation process which would remove metals by converting them to available form in fly ash.

Filler Pigments Designed for Recyclability

1992 ◽  
Vol 266 ◽  
Author(s):  
June D. Passaretti ◽  
Trudy D. Young ◽  
Mick J. Herman ◽  
D. Bruce Evans
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Particle Size Distribution ◽  
Physical Properties ◽  
Size Distribution ◽  
Paper Industry ◽  
Precipitated Calcium Carbonate ◽  
Recycled Paper ◽  
New Material ◽  
The Cost

AbstractThis paper discusses the use of a new rhombohedral precipitated calcium carbonate (PCC) morphology and existing PCC morphologies in wood free, wood containing, and recycled paper. The new material has properties that mimic TiO2 with respect to morphology, particle size, particle size distribution, and surface area. TiO2 is widely used by the paper industry as a functional filler for opacity and brightness. The new PCC rhombohedral morphology can be used in place of TiO2 for many applications greatly reducing the cost of production.The physical properties of the new PCC morphology as well as application as a paper filling pigment will be discussed.

Sign in / Sign up

Export Citation Format

Share Document