RR689 - Silica baseline survey: Annex 3 - Stonemasonry . - HSEMar 4, 2004 . powered by compressed-air or by electric motors useable in wet . containing stone is sawn, chiselled or abraded the silica crystals are split or.motor silica stone,Improving the Performance of Fan-Powered Dust Collectors in Stone .respirable silica dust when conducting the different tasks in stone preparation, . original stock 0.56 kw motor and blower was replaced with a 2.24 kw motor and.copper silica feldspar silver gypsum soda ash coal sulfur lead .DIMENSION STONE. RAW MATERIALS . silica soda ash. ABRASIVE AND REFRACTORY. MATERIALS clays graphite . insulation for electrical motors paints.
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