Opaline Outgrowths on Lee Formation Sandstones in Wise County,Virginia

Good quality Petosky stones can still be found even though people have been collecting them for years; they are especially easy to spot when wet and free from their containing rocks.     

胺类捕收剂对异极矿等4种矿物浮选行为的影响

考察了不同碳链长度的胺类捕收剂对异极矿、石英、白云石和褐铁矿浮选行为的影响,讨论了胺的碳链长度对捕收异极矿的影响。结果表明,在pH为9~11的条件下,异极矿的浮选回收率最高,胺对异极矿的选择性随着脂肪胺碳链长度的增加而增加,其中,十八胺对异极矿具有较好的捕收能力和选择性。