Konstrukcijske značajke i učinkovitost vertikalnih udarnih drobilica
| Autor: | Branko Salopek, Ivan Sobota, Goran Bedeković |
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| Jazyk: | chorvatština |
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Rudarsko-geološko-naftni zbornik Volume 14 Issue 1 Rudarsko-geološko-naftni Zbornik, Vol 14, Iss 1, Pp 65-75 (2002) |
| ISSN: | 1849-0409 0353-4529 |
| Popis: | Na tržištu tehničkog kamena najtraženije su klase veličine zrna 4/8, 2/4, -4, -2 mm, čiji maseni udio prevladava u agregatima za izradu betona i asfalta. Međutim proizvodnja tih klasa nije uvijek jednostavna. Pored zahtjeva za količinom, redovito se traži određeni grano-sastav i oblik zrna kamenog agregata, te minimalan udio čestica veličine -0,09 mm. Do prije desetak godina, najčešće su se za proizvodnju navedenih klasa koristile udarne drobilice i čekićare, dok se danas u tu svrhu sve češće koriste vertikalne udarne drobilice. Vertikalne udarne drobilice predstavljaju izvjestan tehnološki napredak koji se prvenstveno očituje u većem udjelu zrna kubičnog oblika u izlaznom materijalu i manjem habanju udarnih elemenata i obloge u odnosu na prije spomenute drobilice. U članku su opisane osnovne konstrukcijske značajke i princip rada vertikalnih udarnih drobilica, te je analizirana njihova učinkovitost (grano-sastav proizvoda, udio zrna povoljnog oblika, udio čestica -0,09 mm u ovisnosti o utjecaju pojedinih tehnoloških parametara. In the technical stone market, the most demanded grain size classes are 4/8, 2/4, -4, -2 mm, which weight portion being predominant in aggregates for production of concrete and asphalt. However, the production of these classes is not always simple. In adition to quantity requirements, the specific grain size distribution and grain shape of stone aggregate, as well as a minimal portion of the particles -0,09 mm are regurarly demanded. Until about ten years ago, impact and hammer crushers were most often used for the production of the above mentioned classes, while nowdays vertical impact crushers are being used with increasing frequency for this purpose. Compared to the first-mentioned crushers, vertical impact crushers represent a certain technological progress manifested primarily in a greater content of cubic shaped graines in output material and reduced wear of crusher lining and impact elements. The paper descibes the basic construction features and the operating principle of vertical impact crusher and analyzes their efficiency (grain size distribution of the crushed product, content of favourably shaped grains, filler content) as a function of the particular technological parameters. |
| Databáze: | OpenAIRE |
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