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Showing 1 to 20 of 87 for “"blasting"”.
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The Effect of Fragmentation Specification on Blasting Cost
Drilling and blasting are seen as sub-systems of size reducing operations in mining. To have better design parameters for economical excavation of mineral production and fragmentation, the comminution and fragmentation operations need to be studied and optimized independently, as well as together, …
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Innovative Deposition of Corrosion Inhibitors by Abrasive Blasting
Abrasive blasting of steel using garnet is a commercial surface cleaning procedure, for removing old corrosion scales and paint prior to the application of new coatings. A certain percentage of the garnet and its impurities remain attached, partially covering the steel. Between cleaning and …
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Abrasive Blasting with Post-Process and In-Situ Characterization
Abrasive blasting is a common process for cleaning or roughening the surface of a material prior to the application of a coating. Although the process has been in practice for over 100 years, the lack of a comprehensive understanding of the complex interactions that exist with the process can still …
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An experimental evaluation of explosives in blasting limestone and granite
<p>"The purpose of this study was the evaluation of military and commercial explosives. A standardized index of effectiveness was used as the basis of comparison.</p> <p>Testing was conducted at the Experimental Mine of Missouri School of Mines and Metallurgy at Rolla, Missouri, and at …
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Response of Buildings to Ground Vibrations Resulting From Construction Blasting
Made available in DSpace on 2014-12-10T22:21:44Z (GMT). No. of bitstreams: 1 7212143.pdf: 11787546 bytes, checksum: 9463e6e3372cb41f6ca497cd5ebed4ec (MD5) Previous issue date: 1971
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Particle breakage in sand blasting due to impact on ductile materials
… applications are done by several processes. Sand blasting is one of them, where a stream of sand particles is forcefully projected onto a surface, with compressed air or steam. These sand particles break up into very small pieces upon impact, which are inhaled by workers to cause silicosis. While …
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Analysis of rbd palm olein abrasive blasting as new metal surface cleaning method
Abrasive blasting is a process done for surface cleaning which has two methods which are dry or wet process. The dry process which uses abrasive media blasted onto a surface to clean dirt on the surface normally will release fine dust into the environment. Water is used with abrasive media to …
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Abrasive Blasting Process Optimization: Enhancing Productivity, and Reducing Consumption and Solid/Hazardous Wastes
Abrasive blasting process optimization is aimed at establishing relationships between applied feed rates and resulting productivity and consumption rates. It is clear that the high costs of disposal of the multimedia wastes generated by the dry abrasive blasting processes are of increasing concern …
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An Experimental Investigation of the Effect of Blasting on the Impact Breakage of Rocks
… of valuable minerals and rocks. Drilling and blasting, being the first operation in the size reduction chain, may have a significant downstream effect, influencing mine economics. This thesis investigates effects of blasting on subsequent size reduction operations. A series of small scale …
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Geometry optimization of dry ice blasting nozzle for the noise reduction using experimental validation
Dry ice blasting provides many advantages to surface cleaning in which the blasting medium sublimate during the surface impact will not leave a secondary contamination. However, on the negative side of dry ice blasting (DIB), it produces a high noise exposure. The noise exposure during a high …
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The influence of charge geometry on the response of cylinders to internal air blasting
The effect of charge geometry on the structural response of right circular cylinders, subjected to internal blast loading, was investigated. Thin-walled, seamless 304 stainless steel cylinders were subjected to blast loads from partially confined bare cylindrical PE4 charges with different diameter …
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Blasting Design Using Fracture Toughness and Image Analysis of the Bench Face and Muckpile
Few studies of blasting exist because of difficulties in obtaining reliable fragmentation data or even obtaining consistent blasting results. Many researchers have attempted to predict blast fragmentation using the Kuz-Ram model, an empirical fragmentation model suggested by Cunningham. The purpose …
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The effects of seismic blasting on shallow water wells and aquifers in western North Dakota
… Dakota has generated concern over the effects of blasting on groundwater supplies and wells. A preliminary investigation revealed complaints alleging declining productivity and decreased water quality in regions where coal aquifers are extensively used. Unplugged shotholes were frequently cited as …
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Policy, Participation and Empowerment: A Case Study of Community Resistance to Shells Seismic Blasting in the Eastern Cape
This research examines the conflict in South African government policy between a people-centred participatory rhetoric on the one hand, and neoliberal growth-centred rhetoric on the other; and how this has played out in the recent series of related court cases. The methodology employed was a case …
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Design and Analysis of a New Abrasive Blasting System for an Abrasive Applicator Utilized in a Novel Weed Control Method
<p>A new abrasive blasting system was designed to satisfy the unique design requirements of an abrasive applicator to be used in a novel, post-emergence, selective weed control method in organic cropping systems. Specifically, the desire to eliminate the pressurized reservoir and wear of the nozzle …
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Effect of Implant Surface Microtopography by Hydroxyapatite Grit-Blasting on Adhesion, Proliferation and Differentiation of Osteoblast-like Cell Line, MG-63
… modified surfaces, RBM (resorbable blasting media) surfaces that generate a hydroxyapatite grit-blasting. Methods: First, to produce microtopographically modified surfaces, we made the RBM surfaces using a hydroxyapatite grit-blasting and examined the surface morphology, roughness or …
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Investigating blast fume propagation, concentration and clearance in underground mines using computational fluid dynamics (CFD)
<p>"Blasting activities using standard industry explosives is an essential component of underground hard rock mining operations. Blasting operations result in the release of noxious gases, presenting both safety and productivity threats. Overestimation of post-blast re-entry time results in …
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The Adhesion Strength of a Plasma Sprayed Silicon Bond Coating on a Silicon Carbide Ceramic Matrix Composite
… roughening of metallic components via grit blasting is well documented and understood, but much less is known about preparing ceramic and ceramic composite surfaces for thermal spray coating. Silicon coatings are often used as a bond coating between SiC-based components and EBC top layers, …
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Development of icejet-based surface processing technology
… potential of water ice. Material removal by blasting with ice media such as particles, pellets and slugs was investigated. The ice media was accelerated by entrainment in a fluid stream (air, steam, liquid water, supercritical C0_2), impact of rotating blades, fluid expansion, etc. The …
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