1,720,972 research outputs found
Geo-mechanical characterization for the underground marble mine “Su Cuccumiau” (Sardinia)
No full textPromoting ecological sustainable planning for natural stone quarrying. The case of the Orosei Marble Producing Area in Eastern Sardinia
No full textThis paper presents an analysis of the main environmental impact factors (noise, vibration, fumes, dust, vehicle traffic) associated with marble quarrying and processing in the Orosei industrial area and their effects. Solutions are also proposed to prevent, mitigate and, where possible, eliminate the impact on the environment. Using three-dimensional topographic models, the authors simulated quarry and industrial processing development, with projections over the next 10, 30 and 50 years. The aim of these simulations was to establish land management planning guidelines for the optimal and environmentally sustainable development of the Orosei Marble industrial area. Lastly, careful quarry development planning is important both for enhancing LCA and for improving production processes through sustainable technologies that yield green label products meeting environmental performance standards
Geo-mechanical characterization for the underground marble mine “Su Cuccumiau” (Sardinia)
No full text
Recovery of sawdust resulting from marble processing plants for future uses in high value added products
No full textThe disposal of microfine marble sawdust contained in marble slurry waste, currently represents an additional economic burden for dimension stones companies. This is because the sawdust is considered less important in comparison with the crushed calcareous aggregate produced in stone processing
plants. In addition, the sludge is mistakenly viewed as waste that has to be disposed of in landfill. State of the art in recovery and utilisation of calcareous sawdust is mainly aimed in uses as substitute for more expensive ingredient in the building sector. Moreover limestone dust, recovered from marble sawing and
processing slurry, has not yet found real economically feasible industrial usage. Due to the high market value of micronised CaCO3, we study the use of limestone sawdust as functional filler in industrial products having higher added value, such as paper, rubber, paints, pharmaceuticals. Standard requirements
of CaCO3 for this kind of products are very tight, especially those relating to purity level, particle size distribution and brightness. The high Calcium limestone deposit and the factories in Orosei Marble producing area (Sardinia, Italy) allow the production of high quality microfine dust. To evaluate the properties of the sawdust, several analysis were carried out to compare the results with the standard requirements of CaCO3 for paper, rubber and tyre production. The assessment concerns five different factories and it highlights the possible usage of the sawdust produced in Orosei by carrying out simple and inexpensive changes in both stone-working process and wastewater treatment. Finally, a commentary on environmental laws pertaining to the recycle of this kind of waste is also made in this paper
Programmatic guidelines for the environmentally sustainable improvement and development of the Industrial District of Orosei Marble
No full textFrom landfill to water, land and life: the creation of the Centre for stone materials aimed at secondary processing
No full textThis paper focuses on the creation of a Centre for the recycling of stone materials. The Centre will be able to offer a range of activities amongst which is the improvement of the production chain of the Orosei Marble district in Sardinia, Italy. Several companies operate within the marble producing area, specializing in both quarrying and stone processing. They have formed a Consortium in order to rehabilitate an area of more than 17 ha. The restoration will be carried out through an environmentally sustainable procedure. The area was previously used as a landfill for waste deriving from marble quarrying and processing. At that time unshaped blocks of various sizes (which are unsuitable to block-cutter sawing), waste deriving from both block sawing and slab/strip cutting (such as broken slabs, strips, tiles) and microfine dust from filter presses of water treatment plants were representing an environmental problem. The local administration was struggling to find new areas which could be used for landfills, resulting in an additional cost for the landfill, ultimately affecting the variable production costs. The project involves the building of a venue to be used for temporary storage, treatment of wastes produced by both quarrying and primary processing, in order to make them suitable as secondary raw materials. The project also deals with the catch basin hydrology of the area involved in the project, the building of a multifunctional centre, the landscaping and other environmental features such as vehicle traffic and slopes greening
COMBINED CYCLE PLANT FOR ELECTRICAL ENERGY PRODUCTION WITH COGENERATION OF THERMAL ENERGY FROM THE COMBUSTION OF VEGETABLE OILS
No full text- …
