Ukukhubazeka kokunwetshwa okufana notwayi noma i-fin kufundwe kakhulu ngokubuka kokuqukethwe kwe-binder nezakhiwo.
Kuleli phepha, lokhu kukhubazeka kwensimbi yempunga okusungulwe ezimotweni kwahlolwa ngezikhunta zesihlabathi eziluhlaza nezikhunta zegobolondo, ikakhulukazi ngokubuka kokuqukethwe kwe-feldspar esihlabathini se-silica. Ukuqina okushisayo kwesihlabathi sokubumba kukhuphuke ngokwandisa okuqukethwe kwe-feldspar esihlabathini se-silica. Lokhu kwanda kobunzima obushisayo kubangelwe ukumanzana kwe-feldspar okusanhlamvu. Kwakusebenza kahle ekukhubazekeni kukakhwekhwe ekubunjweni kwesihlabathi esiluhlaza kanye nezikhunta zegobolondo. Lapho ukungena kwensimbi nokuqedwa kuvela ebusweni bezinhlamvu zegobolondo ezizungezwe yizingxenye zensimbi esindayo, izengezo ze-feldspar ziyelaphile le nkinga ezikhathini eziningi.
Isibonelo, ukufaka u-11% feldspar esihlabathini se-silica kunciphise ama-scabs ezindaweni ezingamakhebuli egobolondo abesetshenziselwa amacala okudlulisa (cishe isisindo esingu-25kg). Endabeni yama-cores wejazi lamanzi yamakhanda esilinda kanye nezinsimbi zenjini yedizili, bekudingeka ukwengezwa kuze kufike ku-11-37% lapho kwenzeke khona inhlawulo enkulu nokungena. Ngenkathi lawa ma-castings enezimbobo ezimbalwa ngokwedlulele zokukhipha isihlabathi esiyisisekelo, kwakudingekile ukuthi kungangezwa ngaphezu kwe-27% ye-feldspar, ngoba ama-cores wejacket ahluleka ukuwa ngenxa yokudla okwabangelwa ukuhlanganiswa kwe-feldspar.
iphathelene nobuchwepheshe bokuphonsa umfanekiso wesayizi omkhulu ngegobolondo lensimbi. Isebenzisa uqhekeko inqubo yokubuyisela emuva emuva kusuka ekubunjweni kwesihlabathi. Isendlalelo sokugcwalisa ukushuba okufana nokwodonga lokulingisa sibekwe ebusweni besikhala sangaphakathi sesikhunta saso sephrofayili, khona-ke umnyombo waso ungenziwa ngqo emgodini wangaphakathi, bese ukugcwaliswa kususwe, ukuze ingenza izinqubo zokuvala nokuthela. Ukusungulwa okulula kulula enqubeni yokubumba, kuphansi kwezindleko zokukhiqiza futhi akunasidingo sokwenza ibhokisi eliyisisekelo. Isifanekiso esishiwoyo singake sibunjwe, futhi ikhwalithi yaso yomhlaba yinhle, ifomu liyiqiniso ngempela
Isikhathi Iposi: Nov-20-2020