Isiphetho:Umshini wokucisha i-feldspar ukhuluma ngomshini ongakwazi ukufaka isidingo sokuqeshwa kwe-feldspar. Lomshini unamathuluzi amaningi nezici, ngakho-ke kudingeka ukhetho, nakuba into ibonisiwe.

Umshini wokucisha i-feldspar ukhuluma ngomshini ongakwazi ukufaka isidingo sokuqeshwa kwe-feldspar. Lomshini unamathuluzi amaningi nezici, ngakho-ke kudingeka ukhetho, nakuba into ibonisiwe,

Okwamanje, sesikwazi kakade i-material okumele kusetshenziswe – i-feldspar, bese kudingeka siqonde okuthile ngayo, ukuze sibone izimpawu zayo ezithile. Lokhu kuyinto eyodwa yokukhetha imishini yokuhlafuna, uma ungaqondi isimo se-feldspar ekukhetheni idivayisi, bese lokho kungaba yinkinga ekukhiqizeni, kungaba ngenxa kwezimpawu ze-material kanye nekhono ledivayisi lokwenza umsebenzi, okwenza ukukhiqiza kungayihlala kahle.

Okwabili, kudingeka siqonde izidingo zokusebenza, isibonelo, ukukhuluka kwesifeldspathi esigqityiwe, kanye nobukhulu bokusebenzisa okutholiweyo, lezi zinto nazo zibalulekile njengemibono yokukhetha umshini wokucisha. Ngaphandle kwalokho, akukho ndlela yokwanelisa izidingo zokukhiqiza.

Ngaphezu kwalezi zinto ezimbili ezingenhla, inqubo yokukhetha umshini wokugaya i-feldspar, kodwa futhi kudingeka kubhekwe ubunzima benqubo, ukusetshenziswa kwemishini yamanani nokunye, lokhu kunesithakazelo esikhulu ezingeni lokuthuthukiswa kokwenziwa, ngakho-ke ukukhetha isikhathi akunakudunyiswa.