Use of glass polishing waste in the development of ecological ceramic roof tiles by the geopolymerization process

2020 ◽  
Vol 17 (6) ◽  
pp. 2649-2658
Author(s):  
Afonso R. G. Azevedo ◽  
Markssuel Teixeira Marvila ◽  
Higor Azevêdo Rocha ◽  
Lucas Reis Cruz ◽  
Carlos Mauricio Fontes Vieira
Keyword(s):  
Glass Polishing

Circular economy and durability in geopolymers ceramics pieces obtained from glass polishing waste

2021 ◽  
Author(s):  
Afonso R.G. de Azevedo ◽  
Markssuel Teixeira Marvila ◽  
Leandro Barbosa de Oliveira ◽  
Weslley Macario Ferreira ◽  
Henry Colorado ◽  
...  
Keyword(s):  
Circular Economy ◽  
Glass Polishing

Velocity control algorithm in glass polishing based on the cubic NURBS curve

2017 ◽  
Vol 232 (4) ◽  
pp. 685-696 ◽  
Author(s):  
Junzhao Han ◽  
Wenhua Chen
Keyword(s):  
Control Algorithm ◽  
Linear Acceleration ◽  
Control Points ◽  
Velocity Control ◽  
Polishing Process ◽  
Nurbs Curve ◽  
Weighting Factors ◽  
Final Velocity ◽  
Contact Points ◽  
Glass Polishing

To limit velocity fluctuations and to achieve a controllable jerk value in a glass polishing process, a new velocity control algorithm is proposed based on nonuniform rational B-splines (NURBS). The key of this algorithm is replacing the traditional linear acceleration–deceleration with flexible NURBS acceleration–deceleration. Based on the linear acceleration–deceleration algorithm, the control points of the NURBS curve are confirmed, and the final velocity of the polishing wheel center is solved using the Preston equation. With jerk continuity and limitations of the servo system, nonlinear equations are constructed, and the weighting factors corresponding to the control points are obtained. Cubic velocity control equations can be derived from the obtained feature parameters, which include the final velocity, control points, weighting factors and knot vectors. Based on the proposed NURBS acceleration–deceleration algorithm, a fourth-order Runge–Kutta formula was used to obtain the initial points, and the Milne–Hamming equation was used to predict and correct the next point. The predictor-corrector interpolation algorithm for parametric trajectory was implemented during the polishing process. The experimental results indicate that the proposed approach guarantees limited fluctuations of the relative velocity at contact points and ensure smoother velocity changes at dangerous points.

scholarly journals Recycle of Ceria-Based Glass Polishing Powder Using NaOH Solution.

2000 ◽  
pp. 725-731 ◽  
Author(s):  
Kazuhiro KATO ◽  
Toshiaki YOSHIOKA ◽  
Akitsugu OKUWAKI
Keyword(s):  
Naoh Solution ◽  
Glass Polishing

scholarly journals Recovery of Cerium from Glass Polishing Waste: A Critical Review

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 801 ◽  
Author(s):  
Chenna Borra ◽  
Thijs Vlugt ◽  
Yongxiang Yang ◽  
S. Offerman
Keyword(s):  
Particle Size ◽  
Chemical Properties ◽  
Value Added ◽  
Leach Solution ◽  
Chemical Processes ◽  
Efficient Utilization ◽  
Selective Precipitation ◽  
Physico Chemical ◽  
Main Component ◽  
Glass Polishing

Ceria is the main component in glass polishing powders due to its special physico-chemical properties. Glass polishing powder loses its polishing ability gradually during usage due to the accumulation of other compounds on the polishing powder or due to changes in the particle size distribution. The recovery of cerium from the glass polishing waste results in the efficient utilization of natural resources. This paper reviews processes for the recovery of rare earths from polishing waste. Glass polishing powder waste can be reused via physical, physico-chemical or chemical processes by removing silica and/or alumina. The removal of silica and/or alumina only improves the life span up to some extent. Therefore, removal of other elements by chemical processes is required to recover a cerium or cerium-rich product. However, cerium leaching from the polishing waste is challenging due to the difficulties associated with the dissolution of ceria. Therefore, high acid concentrations, high temperatures or costly reducing agents are required for cerium dissolution. After leaching, cerium can be extracted from the leach solution by solvent extraction or selective precipitation. The product can be used either in glass polishing again or other high value added applications.

Study for Recycling of Ceria-Based Glass Polishing Powder

2000 ◽  
Vol 39 (4) ◽  
pp. 943-947 ◽  
Author(s):  
Kazuhiro Kato ◽  
Toshiaki Yoshioka ◽  
Akitsugu Okuwaki
Keyword(s):  
Glass Polishing

scholarly journals Development of Alternative Abrasives of Cerium Oxide for Glass Polishing

2012 ◽  
Vol 78 (791) ◽  
pp. 2710-2719
Author(s):  
SeungBok LEE ◽  
Okiharu KIRINO ◽  
Yasuhiro TANI ◽  
Junji MURATA
Keyword(s):  
Cerium Oxide ◽  
Glass Polishing

Analysis and modeling of tribology effects in conventional glass polishing

2013 ◽  
Author(s):  
Daniel Waechter ◽  
Olaf Dambon ◽  
Fritz Klocke
Keyword(s):  
Glass Polishing
Sign in / Sign up

Export Citation Format

Share Document