Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study
Abstract
In this study, an optimal mixture of loess brick clays and waste coal dust in laboratory hollow blocks production is determined with the aim of promoting sustainable development in terms of saving resources and energy. The novelty of the work lies in the first-time utilization of waste coal dust in combination with loess soil brick-making thus bolstering European effort on waste utilization. The mentioned is also in line with UN sustainable development goals, SDG 12 and 9. The chemical and mineralogical contents of the clays were obtained using various chemical characterization methods, and thermal behavior by using dilatometry and simultaneous DSC/TG analysis. The important ceramic and technological characteristics of the extruded brick clay and waste coal dust composite samples during molding, drying, and firing were obtained. The chosen mixture of 70 % calcareous clay and 30 % plastic clay to 3 % of high-calorie waste coal dust is found optimal. Industrial-scale optimal blocks (250x...190x190 mm(3)) with 60 % of vertical voids were fired in a tunnel kiln, and the firing regime was recorded. It is determined that the regime must be corrected in the firing and cooling zone since the differences measured by thermo-couples were up to 180 degrees C. The industrial prototype was found to be of satisfactory quality meeting the requirements of water absorption and compressive strength as per European and other international standards. The study was first of a kind detailed characterization of the industrial size bricks encompassing waste coal dust and loess brick clays, with the emphasis on the usability in the industry, and additionally recording and correcting of the firing regime in a tunnel kiln. The product is recyclable and can be disposed of safely after the end of life.
Keywords:
Tunnel kiln / Optimization / Optimal mixture / Loess brick clay / Firing regime / Coal dustSource:
Environmental Technology & Innovation, 2021, 21Publisher:
- Elsevier, Amsterdam
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200012 (Istitute of Material Testing of Serbia - IMS, Belgrade) (RS-200012)
- Royal Academy of Engineering, UKRoyal Academy of Engineering - UK
- Indo-UK partnership Industry-academia scheme [IAPP18-19\295, EXPP2021\1\277
DOI: 10.1016/j.eti.2020.101350
ISSN: 2352-1864
WoS: 000618243900022
Scopus: 2-s2.0-85098991620
Collections
Institution/Community
Institut za ispitivanje materijalaTY - JOUR AU - Vasić, Milica AU - Goel, Gaurav AU - Vasić, Miloš AU - Radojević, Zagorka PY - 2021 UR - http://rims.institutims.rs/handle/123456789/397 AB - In this study, an optimal mixture of loess brick clays and waste coal dust in laboratory hollow blocks production is determined with the aim of promoting sustainable development in terms of saving resources and energy. The novelty of the work lies in the first-time utilization of waste coal dust in combination with loess soil brick-making thus bolstering European effort on waste utilization. The mentioned is also in line with UN sustainable development goals, SDG 12 and 9. The chemical and mineralogical contents of the clays were obtained using various chemical characterization methods, and thermal behavior by using dilatometry and simultaneous DSC/TG analysis. The important ceramic and technological characteristics of the extruded brick clay and waste coal dust composite samples during molding, drying, and firing were obtained. The chosen mixture of 70 % calcareous clay and 30 % plastic clay to 3 % of high-calorie waste coal dust is found optimal. Industrial-scale optimal blocks (250x190x190 mm(3)) with 60 % of vertical voids were fired in a tunnel kiln, and the firing regime was recorded. It is determined that the regime must be corrected in the firing and cooling zone since the differences measured by thermo-couples were up to 180 degrees C. The industrial prototype was found to be of satisfactory quality meeting the requirements of water absorption and compressive strength as per European and other international standards. The study was first of a kind detailed characterization of the industrial size bricks encompassing waste coal dust and loess brick clays, with the emphasis on the usability in the industry, and additionally recording and correcting of the firing regime in a tunnel kiln. The product is recyclable and can be disposed of safely after the end of life. PB - Elsevier, Amsterdam T2 - Environmental Technology & Innovation T1 - Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study VL - 21 DO - 10.1016/j.eti.2020.101350 ER -
@article{ author = "Vasić, Milica and Goel, Gaurav and Vasić, Miloš and Radojević, Zagorka", year = "2021", abstract = "In this study, an optimal mixture of loess brick clays and waste coal dust in laboratory hollow blocks production is determined with the aim of promoting sustainable development in terms of saving resources and energy. The novelty of the work lies in the first-time utilization of waste coal dust in combination with loess soil brick-making thus bolstering European effort on waste utilization. The mentioned is also in line with UN sustainable development goals, SDG 12 and 9. The chemical and mineralogical contents of the clays were obtained using various chemical characterization methods, and thermal behavior by using dilatometry and simultaneous DSC/TG analysis. The important ceramic and technological characteristics of the extruded brick clay and waste coal dust composite samples during molding, drying, and firing were obtained. The chosen mixture of 70 % calcareous clay and 30 % plastic clay to 3 % of high-calorie waste coal dust is found optimal. Industrial-scale optimal blocks (250x190x190 mm(3)) with 60 % of vertical voids were fired in a tunnel kiln, and the firing regime was recorded. It is determined that the regime must be corrected in the firing and cooling zone since the differences measured by thermo-couples were up to 180 degrees C. The industrial prototype was found to be of satisfactory quality meeting the requirements of water absorption and compressive strength as per European and other international standards. The study was first of a kind detailed characterization of the industrial size bricks encompassing waste coal dust and loess brick clays, with the emphasis on the usability in the industry, and additionally recording and correcting of the firing regime in a tunnel kiln. The product is recyclable and can be disposed of safely after the end of life.", publisher = "Elsevier, Amsterdam", journal = "Environmental Technology & Innovation", title = "Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study", volume = "21", doi = "10.1016/j.eti.2020.101350" }
Vasić, M., Goel, G., Vasić, M.,& Radojević, Z.. (2021). Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study. in Environmental Technology & Innovation Elsevier, Amsterdam., 21. https://doi.org/10.1016/j.eti.2020.101350
Vasić M, Goel G, Vasić M, Radojević Z. Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study. in Environmental Technology & Innovation. 2021;21. doi:10.1016/j.eti.2020.101350 .
Vasić, Milica, Goel, Gaurav, Vasić, Miloš, Radojević, Zagorka, "Recycling of waste coal dust for the energy-efficient fabrication of bricks: A laboratory to industrial-scale study" in Environmental Technology & Innovation, 21 (2021), https://doi.org/10.1016/j.eti.2020.101350 . .