Recycling of abrasives in abrasive water jet cutting with different types of granite
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ORIGINAL PAPER
Recycling of abrasives in abrasive water jet cutting with different types of granite Gokhan Aydin
Received: 9 February 2013 / Accepted: 10 September 2013 # Saudi Society for Geosciences 2013
Abstract The cost of abrasives has restricted usage of abrasive water jet (AWJ) technology in natural stone cutting applications. However, recycling of the abrasives makes the technology more economical, effective, and environmentally friendly. In this study, significant rock properties affecting the recycling of abrasives in AWJ cutting of granites are investigated. Abrasive mass percentage above 106 μm (AMP106μm) is considered as a performance criterion in terms of recycling of abrasives since these abrasives can be effectively reused in the rock cutting applications. The study reveals that a considerable amount of used abrasives is in a reusable form. Among the rock properties, the microhardness is statistically determined as the most significant rock property affecting the AMP106μm. It is also concluded that theAMP106μm can be explained with high accuracy by the proposed model including the microhardness, the quartz content, and the plagioclase content. Keywords Abrasive water jet . Rock . Abrasive . Recycling
Introduction The use of natural stones has dramatically increased in the last few years worldwide. The growing commercial market and competition for natural stones have resulted in an increased demand for innovative manufacturing processes (Sengun and Altindag 2013; Ataei et al. 2012). Due to the composition of natural stones (especially granite), machining and processing with traditional systems have some difficulties (Mikaeil et al. 2013; Bayram 2012). Therefore, new cutting methods to increase machining efficiency by minimizing production time G. Aydin (*) Department of Mining Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey e-mail: [email protected]
and costs are required. Among the innovative manufacturing processes, abrasive waterjet (AWJ) cutting has developed a broad application area as an alternative technology to traditional systems in processing and machining of natural stones and most engineered materials (Aydin et al. 2011). Many studies have been conducted on the AWJ technology and the cutting of natural rock and artificial rocklike materials with particular applications. The effects of some process parameters on the penetration of sandstones machined by highspeed AWJ were investigated by Brook and Summers (1969). A fine continuous high-pressure AWJ for coal and rock penetration was studied by Nikonov and Goldin (1972). Chakravarthy and Babu (1999) presented a fuzzy-based model and suggested a set of process parameters in the cutting of black granite by AWJ. Chakravarthy and Babu (1998) proposed an approach based on the principles of fuzzy logic and genetic algorithm for the selection of optimal process parameters in AWJ cutting of granite. Xiaohong et al. (2000) conducted experimental studies on rock cutting by collimated AWJ. An experimental study was carried out t
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