Edge Grinding of Ceramic Tile by Diamond Cup Wheels

Author(s):  
Hui Yuan ◽  
Y.P. Cheng ◽  
Cheng Yong Wang ◽  
Ying Ning Hu
Keyword(s):  
2021 ◽  
Vol 13 (7) ◽  
pp. 4006
Author(s):  
Lisa Branchini ◽  
Maria Chiara Bignozzi ◽  
Benedetta Ferrari ◽  
Barbara Mazzanti ◽  
Saverio Ottaviano ◽  
...  

Ceramic tile production is an industrial process where energy efficiency management is crucial, given the high amount of energy (electrical and thermal) required by the production cycle. This study presents the preliminary results of a research project aimed at defining the benefits of using combined heat and power (CHP) systems in the ceramic sector. Data collected from ten CHP installations allowed us to outline the average characteristics of prime movers, and to quantify the contribution of CHP thermal energy supporting the dryer process. The electric size of the installed CHP units resulted in being between 3.4 MW and 4.9 MW, with an average value of 4 MW. Data revealed that when the goal is to maximize the generation of electricity for self-consumption, internal combustion engines are the preferred choice due to higher conversion efficiency. In contrast, gas turbines allowed us to minimize the consumption of natural gas input to the spray dryer. Indeed, the fraction of the dryer thermal demand (between 600–950 kcal/kgH2O), covered by CHP discharged heat, is strictly dependent on the type of prime mover installed: lower values, in the range of 30–45%, are characteristic of combustion engines, whereas the use of gas turbines can contribute up to 77% of the process’s total consumption.


2021 ◽  
Vol 23 (4) ◽  
pp. 1295-1310
Author(s):  
Burçin Atılgan Türkmen ◽  
Tuba Budak Duhbacı ◽  
Şeyma Karahan Özbilen

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3863
Author(s):  
Deng-Fong Lin ◽  
Wei-Jhu Wang ◽  
Chia-Wen Chen ◽  
Kuo-Liang Lin

Municipal incinerator bottom ash (MIBA) and sewage sludge ash (SSA) are secondary wastes produced from municipal incinerators. Landfills, disposal at sea, and agricultural use have been the major outlets for these secondary wastes. As global emphasis on sustainability arises, many have called for an increasing reuse of waste materials as valuable resources. In this study, MIBA and SSA were mixed with clay for ceramic tile manufacturing in this study. Raw materials firstly went through TCLP (Toxicity Characteristic Leaching Procedure) to ensure their feasibility for reuse. From scanning electron microscopy (SEM), clay’s smooth surface was contrasted with the porous surface of MIBA and SSA, which led to a higher water requirement for the mixing. Specimens with five MIBA mix percentages of 0%, 5%, 10%, 15%, and 20% (wt) and three SSA mix percentages of 0%, 10%, and 20% (wt) were made to compare how the two waste materials affected the quality of the final product and to what extent. Shrinkage tests showed that MIBA and SSA contributed oppositely to tile shrinkage, as more MIBA reduced tile shrinkage, while more SSA encouraged tile shrinkage. However, as the kiln temperature reached 1150 °C, the SiO2-rich SSA adversely reduced the shrinkage due to the glass phase that formed to expand the tile instead. Both MIBA and SSA increased water tile absorption and reduced its bending strength and wear resistance. Increasing the kiln temperature could effectively improve the water absorption, bending strength, and wear resistance of high MIBA and SSA mixes, as SEM showed a more compact structure at higher temperatures. However, when the temperature reached 1100 °C, more pores appeared and seemingly exhausted the benefit brought by the higher temperature. Complex interactions between kiln temperature and MIBA/SSA mix percentage bring unpredictable performance of tile shrinkage, bending strength, and water absorption, which makes it very challenging to create a sample meeting all the specification requirements. We conclude that a mix with up to 20% of SSA and 5% of MIBA could result in quality tiles meeting the requirements for interior or exterior flooring applications when the kiln temperature is carefully controlled.


2001 ◽  
Vol 20 (4) ◽  
pp. 319-331
Author(s):  
F. Xavier Molina-Morales

This paper focuses on the creation of human capital in the industrial districts. I argue that the recent firm strategy perspectives may explain regional (district) differences. In this context human resources are critical to creation and dissemination of the knowledge-based resources. I further distinguish between the degree of control and ownership of resources and transferable and non-transferable human capital. Using this conceptual framework I analyze industrial district addressable non-transferable resources. This paper suggests that firms should take on a more active role in creating and exploiting local addressable human resources. The paper ends by describing an illustrative example: the Spanish ceramic tile industry.


2015 ◽  
Vol 91 (10-11) ◽  
pp. 768-791 ◽  
Author(s):  
Ana Catarina Lopes ◽  
Inês Flores-Colen ◽  
Luis Silva

2010 ◽  
Vol 13 (3) ◽  
pp. 319-323 ◽  
Author(s):  
Carmeane Effting ◽  
Marilena Valadares Folgueras ◽  
Saulo Güths ◽  
Orestes Estevam Alarcon

2017 ◽  
Vol 113 ◽  
pp. 1283-1289 ◽  
Author(s):  
Eduardo F.S. Ciacco ◽  
Jose R. Rocha ◽  
Aparecido R. Coutinho

Sign in / Sign up

Export Citation Format

Share Document