Effect of Temperature on Sodium Silicate Bonded Sand and Its Phase Transformations to Cristobalite in Metal Casting Industry

JOM ◽  
2022 ◽  
Author(s):  
Nayana P. Hoolikantimath ◽  
K. G. Guptha ◽  
Raghuraj K. Rao ◽  
Praveen A. Ghorpade
Keyword(s):  
Phase Transformations ◽  
Sodium Silicate ◽  
Metal Casting ◽  
Effect Of Temperature ◽  
Casting Industry

Effect Pouring Temperature on Casting Defect Susceptibility of Hot Tearing in Metal Alloy Al-Si

2015 ◽  
Vol 758 ◽  
pp. 95-99 ◽  
Author(s):  
Akhyar Hasan ◽  
Suyitno
Keyword(s):  
Mold Temperature ◽  
Metal Alloy ◽  
Hot Tearing ◽  
Metal Casting ◽  
Casting Temperature ◽  
Pouring Temperature ◽  
Index Analysis ◽  
Defect Susceptibility ◽  
Casting Industry ◽  
Hot Tearing Susceptibility

Hot tearing is one of metal casting defects and often found in the casting products such as cracks on the surface. Solidifaction metal causes a thermal contraction and shrinkage, when the contraction and shrinkage occurs if a metal alloy is restrained by mold design, it will effect hot tearing. Hot tearing is influenced by several factors, including the chemical composition of the alloy, the casting temperature, mold temperature, mold constraint, fast or slow solidifaction, non uniform solidifaction, and so on. This study aimed to obtain a certain temperature that cause the maximum of hot tearing defects, so it can be recommended to the metal casting industry in aluminum-silicon material to avoid the casting temperature. Three variations of the casting temperature used in this study including 710 oC, 760 oC and 810 oC. The material used in this study is an alloy of Al-1.19% Si (percent by weight). The method used is a visual method using mold CRCM (Constrain Casting Rod Modified) Horizontal used for the index analysis of HTS (Hot tearing Susceptibility). The results gotten include the hot tearing increases with the increasing of casting temperature, and it decreases with the decreasing the casting pouring. The maximum of hot tearing index is 45 HTS at 760 oC for casting temperature. Tear formed on products from smooth categories (hairline cracks) to the complete categories (broken specimen).

scholarly journals Effect of Temperature and pH on Phase Transformations in Citric Acid Mediated Hydrothermal Growth of Tungsten Oxide

2018 ◽  
Vol 2018 (7) ◽  
pp. 917-923 ◽  
Author(s):  
Kasper Wenderich ◽  
Johannes Noack ◽  
Anne Kärgel ◽  
Annette Trunschke ◽  
Guido Mul
Keyword(s):  
Citric Acid ◽  
Phase Transformations ◽  
Tungsten Oxide ◽  
Hydrothermal Growth ◽  
Effect Of Temperature

scholarly journals Aplikasi 3D Printer Fused Deposite Material (FDM) pada Pembuatan Pola Cor

2019 ◽  
Vol 13 (2) ◽  
pp. 110
Author(s):  
Hamid Abdillah ◽  
Ulikaryani Ulikaryani
Keyword(s):  
Production Process ◽  
Metal Casting ◽  
3D Printer ◽  
Material System ◽  
Total Production ◽  
3D Cad ◽  
Classic Problem ◽  
Good Shape ◽  
3D Printers ◽  
Casting Industry

Metal Casting Industry has a classic problem in handling the production process and quality assurance. This research aims to provide solutions to solve the problems of the metal casting industry by introducing and applying 3D printers with a fused deposit material system. this technology is used to streamline the production process of cast patterns. The process of making a casting pattern usually takes 70% of the total production time of a cast product. The purpose of this study is to examine the application of making cast patterns with a 3D printer with a fused deposit material system. The research methods carried out are (1) create of 3D CAD cast patterns, (2) conversion to STL format, (3) 3D printer setup, (4) printing process, (5) analysis, (6) conclusions. The results obtained are a 3D printer with a fused deposit material system that can be used to make cast patterns. From the analysis of the accuracy of the cast pattern with the 3D printer has a difference in size ranging from 0.2 mm. As for the analysis of the quality of the geometry, the results of the cast pattern of the 3D printer with the fused deposit material system have a good shape but lack results on the surface. Thus a 3D printer with a fused deposit material system is suitable for making cast patterns because it has a consistent tendency and ease in making cast patterns. This opens up opportunities for continued development of 3D printers in the metal casting industry sector.

scholarly journals Effect of Depressants and Temperature on Bastnaesite and Monazite Flotation Separation from a Canadian Rare Earth Element (REE) Ore

Minerals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 225 ◽  
Author(s):  
Jean-Francois Boulanger ◽  
Claude Bazin ◽  
Keven Turgeon
Keyword(s):  
Rare Earth ◽  
Sodium Silicate ◽  
Rare Earth Element ◽  
Earth Element ◽  
Guar Gum ◽  
Effect Of Temperature ◽  
Gangue Mineral ◽  
Lower Grade ◽  
Optimal Separation ◽  
The Impact

A full factorial experimental design was conducted to investigate the effect of temperature and depressants on the flotation of monazite and bastnaesite from carbonate gangue minerals. Temperature, sodium silicate, and guar gum dosage were examined. Mineral reconstruction from energy-dispersive x-ray fluorescence (EDXRF) data was performed to quantify bastnaesite, monazite, and gangue mineral recoveries. Bastnaesite and monazite both follow first-order rates of recovery, with bastnaesite recovering faster and to a larger extent than monazite. The main gangue minerals were depressed together. Optimal separation efficiency was achieved using a larger Na2SiO3 dosage (2400 g/t), no guar gum addition, and a high temperature (75 °C). The rate of bastnaesite recovery increased with the temperature, while sodium silicate improved the ultimate recovery. An economic analysis was performed to evaluate the impact of increasing Rare Earth Element (REE) recovery by allowing a lower grade concentrate to be generated. Despite the high value of REEs, increasing recovery by producing a concentrate bearing more than 68 wt % carbonaceous gangue was uneconomical.

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