Feasibility Study of Stone-Dust as an Alternative Material to Silica Sand for Al–Si (A356) Alloy Casting

2021 ◽  
Author(s):  
Ramesh Kumar Nayak ◽  
Jatin Sadarang
Keyword(s):  
Feasibility Study ◽  
A356 Alloy ◽  
Silica Sand ◽  
Alloy Casting ◽  
Stone Dust ◽  
Alternative Material

scholarly journals Economic analysis of the inclusion of thermoelectric ash in asphalt mixtures

2021 ◽  
Vol 10 (10) ◽  
pp. e28101018564
Author(s):  
Igor Nonato Almeida Pereira ◽  
Newton Paulo de Souza Falcão ◽  
Consuelo Alves da Frota
Keyword(s):  
Asphalt Concrete ◽  
Lower Cost ◽  
Electric Energy ◽  
Asphalt Mixtures ◽  
Raw Material ◽  
Stone Dust ◽  
Alternative Material ◽  
Good Technique ◽  
Materials Used ◽  
The Cost

The replacement of conventional materials used in hot asphalt mixtures with others of good technique and lower cost and environmental impact has motivated research in this area of knowledge in recent decades. The researches should be expanded in the scope of engineering, given that it contributes considerably to the transformation of spaces and raw material. In this context, thermoelectric ashes, which are residues from the production of electric energy, appear as an alternative to replace the stone powder input which contributes negatively to the environment considering that it comes from the blasting of rocks. This work aims to compare the cost of producing traditional asphalt concrete (reference) to asphalt compositions containing 5,15% of alternative material characterized by stone dust. There was a saving of R$ 0.21 per ton of AC machining, consisting of thermoelectric ash as a partial substitute (5.15%) for stone powder, which represents significant savings in a practical context.

A feasibility study on a novel stone dust looping process for abatement of ventilation air methane

2015 ◽  
Vol 140 ◽  
pp. 285-296 ◽  
Author(s):  
Kalpit Shah ◽  
Behdad Moghtaderi ◽  
Elham Doroodchi ◽  
James Sandford
Keyword(s):  
Feasibility Study ◽  
Stone Dust

DEVELOPMENT OF LOW COST BLOCK MOLD FOR COPPER ALLOY CASTING

2016 ◽  
Vol 78 (6-6) ◽  
Author(s):  
Siti Zaleha Mohd Nor ◽  
Romzee Ismail ◽  
Sahrim Ahmad ◽  
Ahmad Salihin Samsudin ◽  
Mohd Ikmar Nizam Mohamad Isa
Keyword(s):  
Copper Alloy ◽  
Low Cost ◽  
Mixing Time ◽  
Mold Temperature ◽  
Silica Sand ◽  
Alloy Casting ◽  
Wax Pattern ◽  
Dilute Suspension ◽  
Molding Materials ◽  
Rat Tail

Suitable block mold formulations for copper alloy casting have been developed and the formulations used were 25% plaster of paris (POP), 75% silica sand and 31-37% water. Silica sand with a grain size of 106-212 µm was added into dilute suspension of POP and the mixing process was continued until a thick slurry (mixture) was obtained. It has been found that the mixing time of molding materials was highly depended on the type of plaster and optimum slurry viscosity around the diameter of 7.7 – 9.6 cm (slump test) was essential to ensure that the wax pattern could be fully invested. In the dewaxing process, the mold was subjected to the temperature of 170oC for 3 hours and burnout process was effectively achieved by heating the molds at 750oC for 5 hours. The pouring process was successfully carried out without any leakage and it was found that all molds can be easily broken under a force of a hammer.  The developed mold also able to produce fully formed of casting without any major defects such as misrun, fin or flash and rat tail, which can be associated with inadequate mold temperature, mold cracks and the separation of mold’s material respectively.

Modification of Ceramic Mold for Investment Casting with Silica Sand as Stucco and Nylon Addition

2015 ◽  
Vol 1112 ◽  
pp. 510-514
Author(s):  
Bondan T. Sofyan ◽  
M. Syahid ◽  
Hafid. A. Khairuddin ◽  
R. Nurdin
Keyword(s):  
Investment Casting ◽  
Hardness Test ◽  
Casting Process ◽  
Silica Sand ◽  
Bending Test ◽  
Ceramic Mold ◽  
Mold Material ◽  
Alternative Material ◽  
Microstructure Examination ◽  
Investment Casting Process

The investment casting process has increasingly been used to produce components because it has the advantage to produce high precision part. One of the obstacles in the investment casting process in Indonesia is imported ceramic mold material. However, Indonesia has the potential silica sand which can be developed as an alternative material mullite . This study aims to develop local silica sand as stucco with the addition of nylon fibers in the slurry. Characterization of the ceramic material is bending test, edge test, and porosity tests that will be compared with the ceramic mold mullite-based. Characterization also conducted on casting product of aluminum impeller turbine by hardness test, microstructure examination by optical microscopy and SEM . The results showed that strength of ceramic molds made ​​from silica sand increase due to the addition of nylon but has not reached a standard ceramic strength. Ceramic mold is able to withstand the load at the time of pouring. There is not misrun in the casting product but some porosity due to low permeability.

scholarly journals Investigation of the Granulometric and Mechanical Properties of Inorganic Used Sand

2020 ◽  
Vol 5 (2) ◽  
pp. 302-308
Author(s):  
Viktória Dargai ◽  
László Varga
Keyword(s):  
Mechanical Properties ◽  
Metal Alloy ◽  
Silica Sand ◽  
Technological Properties ◽  
Inorganic Binder ◽  
Sand Mixture ◽  
Alloy Casting ◽  
Different Temperatures

This paper examines the use of a modified inorganic binder in metal-alloy casting. The results of investigations regarding the effect of reusing the used sand multiple times without reclamation. The technological properties of silica sand with inorganic binders were presented, two different temperatures were applied to make the used sands. After lump crushing the inorganic used sand was recycled in order to make a new sand mixture. Our work was focused on the effect of multiple usage of inorganic used sands on the mechanical and granulometric properties prepared with modified inorganic binder.

Silicon Tetrachloride Synthesis from Rice Hulls: Transmission and Scanning Electron Microscope Study

1972 ◽  
Vol 30 ◽  
pp. 236-237 ◽  
Author(s):  
Richard S. Thomas ◽  
Prabir K. Basu ◽  
Francis T. Jones
Keyword(s):  
Silicon Tetrachloride ◽  
Silica Sand ◽  
Mineral Matter ◽  
Chemical Heterogeneity ◽  
Scanning Electron Microscope Study ◽  
Rice Hulls ◽  
Hull Structure ◽  
Lower Temperature ◽  
Image Position ◽  
Disposal Problem

Silicon tetrachloride, used in industry for the production of highest purity silicon and silica, is customarily manufactured from silica-sand and charcoal.SiCl4 can also be made from rice hulls, which contain up to 20 percent silica and only traces of other mineral matter. Hulls, after carbonization, actually prove superior as a starting material since they react at lower temperature. This use of rice hulls may offer a new, profitable solution for a rice mill byproduct disposal problem.In studies of the reaction kinetics with carbonized hulls, conversion of SiO2 to SiCl4 was found to proceed within a few minutes to a constant, limited yield which depended reproducibly on the ambient temperature of the reactor. See Fig. 1. This suggested that physical or chemical heterogeneity of the silica in the hull structure might be involved.

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