Front Cover: POLIGEM SRL
Via Ernesto Rizzi 13/p, 20077 Melegnano (MI) - Italy

Poligem is a private independent company that has been a leader in the superabrasive market since 1996. Thanks to the experience accumulated in the synthesis, selection and grinding of the diamond, Poligem has been for years a constant presence in Europe in the tools, abrasives and non-conventional diamond applications sectors. From natural diamond to synthetic diamond, from polycrystalline diamond to Cubic Boron Nitride, Poligem is able to respond with the best solution to the needs of the industry.

www.poligem.it

10) IMAS, conceiving, designing and making molds for shaping mattery

20) Quintarelli pietre e marmi Srl. Tradition carved on stone hands down the unchanging beauty of nature

32) The Plus Theatre Exhibitions - WALK OF STONE

34) Marble Izmir to open its doors for the 30th time

40) Stone as a mineral resource in the production of innovative geomaterials and as a tool to enhance the historical centers of Sardinia

On July 13, a conference entitled "A Resource for Transition", organized by the 'Cave and Mines of Sardinia' Association in collaboration with the Department of Chemical and Geological Sciences of the University of Cagliari, was held at the Council Chamber of the Orosei Municipality. During the event, which was well attended not only by those working in the mining sector, there were numerous talks by professors from the Universities of Cagliari, Sassari and Ferrara. In the two scheduled scientific sessions, organized and coordinated by Stefano Columbu, professor of Mining Resources in the degree course in Geological Sciences and Technologies at Cagliari University, various topics of interest to the mining sector and its possible future developments were discussed: from the reuse of mining waste within various industrial sectors to the use of stone for ornamental use to revalorize Sardinia's historic centers. In the first session entitled "Standards and Prospects of the Sector", the first talk by Fiorenzo Fumanti of ISPRA covered recent European and national regulations, in light of the issuance of the recent Decree-Law No. 84 of 06/25/24 bearing: "Urgent provisions on critical raw materials of strategic interest". Stefano Naitza, professor of Economic Geology at the University of Cagliari, summarized the European and Italian regulatory framework on strategic raw materials, highlighting its impact on the mining scene in Sardinia, whose districts are the most relevant, in terms of reserves and production, on a national scale. Indeed, the island is home to numerous critical and strategic raw materials for Europe, from feldspar to fluorspar, cobalt, nickel, copper, tungsten and others, including rare earths.

49) Temporary fixation of diamond cutting and coring equipment

Abstract: The safety of operators working in the cutting and drilling of concrete structures with diamond tools critically depends on the temporary anchoring systems used on construction sites. NADECO, the National Demolition and Circular Economy Association for Construction, has collaborated with IACDS (International Association of Concrete Drillers and Sawers, the global association that unites the major companies operating in the concrete cutting and drilling sector) to develop the Italian version of a guide, available for free upon registration on the NADECO website. The main topics of this guide are reported in this article to provide detailed recommendations to ensure safe and proper anchoring during these operations. The original guide in English, "Temporary Fixation of Diamond Cutting and Coring Equipment", is available on the IACDS website. The aim of this document is to offer practical guidelines and recommendations to improve operational safety on construction sites. The correct anchoring system depends on the following fundamental aspects: the materials to be cut or drilled, the distance of the cutting lines from the edges of the object and specific operational data. Additionally, the correct anchoring procedures will be defined to perform all operations in the safest and most effective manner.

56) Use of diamond wire in decommissioning activities of large metallic structures: the case of the Berkan B ship in Ravenna

64) The implementation of a novel approach to the rare earth magnets recycling

Abstract: Rare Earth magnets have been used in different industrial sectors: household utilities, automotive applications, informatics sensors, etc. Rare Earth magnets show the best magnetic performance, predominantly in the case of Neodymium magnets. However, the economic aspect concerning the raw magnetic materials affects many of the magnet devices, mainly considering the instability of the raw material market. For these reasons, recycling NdFeB magnets is considered a promising solution. Different techniques are available, but they are generally expensive or very dangerous. This work proposes a new approach to recycling the NdFeB sintered magnets using a particular mechanical technique without using Hydrogen, resulting in a safer, less complicated and cheaper process than chemical methods. Based on an impact mill, the process has been performed to grind the magnets recovered from the hard disks. The operation was conducted in a vacuum. Finally, some bonded magnets with recycled powder have been prepared and characterized.

74) SAIE Observatory: revenue growth for more than half of construction companies

77) Machinery-X: the data space for machine tools