A harkar hakar ma’adinai, daidaitaccen ma'anar amfana shine kowane tsari wanda ya inganta (fa'idodi) the economic value of mined ore. Removing valueless materials, results in a higher grade of

Ran Lahadi, Afrilu 22nd, duniya tayi bikin ranar Duniya. Ya fara a 1970 kuma ya zama al'amuran yau da kullun da aka kiyaye a rana ɗaya, inda ake gudanar da abubuwa daban-daban