Recycling of lime mud and fly ash for fabrication of anorthite ceramic at low sintering temperature

Qin, Juan; Cui, Chong; Cui, Xiaoyu; Hussain, Ahmad; Yang, Chuanlei; Yang, Sheng

doi:10.1016/j.ceramint.2014.12.149

Cited by 77 publications

(30 citation statements)

References 34 publications

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“…25) Therefore, when the firing temperature is 1130°C, the samples become denser during firing. However, further increasing the temperature to over 1150°C, the so-called body bloating tends to expand the pores due to the pressure of the gas inside the closed pores and thus the open pores increase, 26) which is accordance with the result of the properties e. g. water absorption and firing linear shrinkage in Fig. 9.…”

Section: )supporting

confidence: 68%

Influence of calcite on the microstructure and sintering properties of the porcelain ceramic tiles at low temperature

Qiu

Dong

Zhou

et al. 2017

J. Ceram. Soc. Japan

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Porcelain ceramic tiles are low-temperature prepared by introducing multiple fluxes. The multiple flux compositions are potash feldspar-sodium feldspar-lithium porcelain stone-calcite four flux system. Effects of calcite contents on the microstructure, sintering and mechanical properties of the samples are studied in a fast firing process. The sintering behaviors of the samples are evaluated by linear shrinkage, water absorption and bulk density. The fired samples are characterized by X-ray diffraction, scanning electron microscopy equipped with an energy dispersive X-ray spectroscopy and bending strength measurements. Well densification of the porcelain ceramic tiles is obtained at a low temperature 11301150°C. The sample prepared with 11% calcite exhibits higher shrinkage and bulk density, lower water absorption at a temperature of 1130°C. Higher bending strength at a composition containing at 11% calcite is due to appropriate densification and high anorthite, quartz and mullite crystallinity.

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Section: )supporting

confidence: 68%

Influence of calcite on the microstructure and sintering properties of the porcelain ceramic tiles at low temperature

Qiu

Dong

Zhou

et al. 2017

J. Ceram. Soc. Japan

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“…Furthermore, lime mud is an appropriate alternative material for the stabilization of forest roads (Habip et al, 2006). As a mixture with biomass fly ash, lime mud can also be used in the fabrication of ceramics (Qin et al, 2015). The main drawback of utilizing these residues for the production of construction materials is that variations in the composition of the residues may cause serious variation in the quality of the products.…”

Section: Construction Materials Ceramics and Catalystsmentioning

confidence: 99%

Separation, treatment and utilization of inorganic residues of chemical pulp mills

Kinnarinen

Golmaei

Jernström

et al. 2016

Journal of Cleaner Production

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a b s t r a c tThe major inorganic solid residues of chemical pulp mills include green liquor dregs, various lime residues, recovery boiler fly ash, and salt cake produced at the chlorine dioxide generator. Only a small proportion of these residues is currently utilized outside the mill area: landfill disposal and reuse at the mill are the most typically applied methods. The situation should be improved in the future for environmental and economical reasons. The focus of this review is on the separation of inorganic pulp mill residues to enhance the possibilities of their utilization. Solid-liquid separation operations, such as filtration and sedimentation, and the associated treatment processes, are described in close detail. The review aims at recognizing the most promising residues for utilization, as well as enhancing the understanding of the material balance of chemical pulp mills. The review also covers the most potential industrial applications for the utilization of residues, as well as the possibilities of using them as raw material in value-added products.

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“…1c). Sintered at 1,150ºC, the formation of spherical structure showed the molten reaction between clay CGCC, forming the glass phase and further the stable crystal lattice structure, different from the anorthite in fly ash ceramic [8,11]. Thus, the ceramsite morphology change indicated the smooth space structure and the mutual adhesion after sintering with improved compressive strength, instead of the loose and coarse grain structure of raw CGCC.…”

Section: Resultsmentioning

confidence: 99%

Environmental Toxicity Analysis and Reduction of Ceramsite Synthesis from Industrial Coal Gasification Coarse Cinder Waste

Jia

Zheng

et al. 2017

Pol. J. Environ. Stud.

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Coal gasification coarse cinder (CGCC) is the main waste in the coal gasification industry, containing low calorific value but high heavy metal residuals. To achieve environmental toxicity stabilization and waste recycling, we developed a manufacturing method of multiple-functional ceramsite from CGCC by pelletizing and sintering. By altering key parameters during the manufacturing process (including CGCC content, sintering temperature, and time), the physical properties and leaching toxicity of ceramsite were evaluated. Sintering temperature was identified with a significantly positive relationship with ceramsite's compressive strength, whereas CGCC content was negatively correlated with water adsorption. The highest compressive strength (24.00 MPa) and relatively lower water absorption (21.36%) was achieved at 50% CGCC content and 1,150ºC sintering for 30 min. The toxicity tests showed acceptable leaching heavy metals with minimal environmental impact. Considering the energy conservation and the maximal recycling of CGCC, optimal ceramsite manufacturing is suggested as 50% CGCC content and 1,150ºC/10 min sintering temperature/time. Our results indicated that multiple-functional ceramsite manufacturing is a low-cost and environmentally friendly approach for CGCC recycling.

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Recycling of lime mud and fly ash for fabrication of anorthite ceramic at low sintering temperature

Cited by 77 publications

References 34 publications

Influence of calcite on the microstructure and sintering properties of the porcelain ceramic tiles at low temperature

Influence of calcite on the microstructure and sintering properties of the porcelain ceramic tiles at low temperature

Separation, treatment and utilization of inorganic residues of chemical pulp mills

Environmental Toxicity Analysis and Reduction of Ceramsite Synthesis from Industrial Coal Gasification Coarse Cinder Waste

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