Mu mapangidwe zitsulo pamwamba mankhwala a phosphorous khungu filimu ndondomeko, adzabala ambiri mankwala slag, monga kuchotsa yake ya izi inaimitsidwa mu madzi abwino slag particles, zidzakhudza bata ndi ukhondo wa thanki madzi mwachindunji. kukhudza chiyeneretso cha mankhwala.Chifukwa chake, ndikofunikira kukonza makina ochotsa phosphating slag pamzere wopanga.