Fachartikel

The term “urban mining”, which is now a well-known concept, refers to the reclamation of compounds and elements from man-made sources. When buildings are being demolished, e. g., any valuable materials encountered, such as copper pipes and cables or old lead piping, can be extracted separately and the metals reused. Concrete rubble can also be recycled to produce new aggregate and ...

Successful process control during the extraction process, as well as the enrichment process of primary raw materials, requires the sensor-based determination of the material composition. Typical technologies, which have been utilized successfully in the mining industry, make use of the electromagnetic spectrum, e. g. XRF, LIBS, NIR, etc. These technologies are usually integrated into the respective process by either establishing a ...

According to a recent industry survey, only 25 % of mining companies believe that cost savings of more than 10 % can be achieved with the right choice of hydraulic oil. 43 % of the surveyed companies even question if the use of high-quality lubricating oil can lead to cost savings at all. At the same time, 95 % of mining companies claim to ...

This article presents the outcomes of a research project to determine the mechanisms of loads imposed on fasteners of cutting bits as well as the resulting wear. Reasons have been identified for the deterioration of the cutting steel under static loads during different cutting profiles. In this context research has also been undertaken to identify means to increase the useful ...

In total eleven dimension stone – limestone quarries in Slovenia, underground mining is carried out today in five quarries, Hotavlje I quarry, Lipica I quarry, Lipica II quarry, Doline quarry, and Debela griža quarry. In all five quarries the reason was primarily the geological structure of the site, the quarry’s condition, the potentially large amounts of the overburden in the event ...

This article deals with export finance for the mining industry. Although the issue has already entered the industry, the hurdles for small to medium-sized enterprises seem to be too large to make a full use of export finance. For this reason, the following article is addressed to exporters who have not yet dealt with the subject in detail. The topic ...

By 2030, workers aged 55 to 64 are expected to make up 30 % or more of the workforce in many European countries. The retirement age is increasing in many member states and many workers are likely to face longer working lives. Efforts must therefore be made to ensure safe and healthy conditions throughout working life. The Europe 2020 strategy identifies ...

Mine ventilation and climatization became increasingly important over the last decade. Main challenges and drivers have been the development of mining activities towards greater depths, more complex deposits with a larger areal extent, the further introduction and implementation of diesel-powered vehicles as well as stricter occupational exposure limits and rising energy costs. To meet these requirements and to keep the ...

As mining activities advanced throughout the centuries, mines increased in depth and complexity, resulting in the development of new technologies and processes. Ventilation was not only affected in terms of increased air quantities to be supplied, but controlling the airflow also gained attention. Until today, these trends are ongoing, meaning mines are still increasing in complexity, depth and machinery used, ...

Worldwide interest in developing technology for the automatic control of mine ventilation systems has existed since the 1980s and has mainly been driven by the need to save costs. Demand-oriented ventilation technology is based on the fundamental idea that those areas of the mine where a lot of work is being done should be provided with a greater flow of ...