Izitena zealumni eziphakamileyo kwiziko lokudubula

Izitena eziphezulu zealumum zokuqhushumba iifanitshala zibhekisa kwiimveliso ezinqabileyo ezenziwe nge-alumina bauxite clinker ephezulu enomxholo weAl2O3 ongaphezulu kwe-48% kwaye isetyenziselwa ukwakha umlilo. Isithando somlilo sesona sixhobo siphambili sokwenza i-ironmaking, kunye nezitena zodongwe zizinto zokufakelwa ezisetyenziswe kwangoko kakhulu kwiziko lokuqhushumba. Ukuqala ngee-1950s, umthamo weeflast blast ukhule waya kwinqanaba elikhulu, kwaye i-8-12m yeziko lobushushu sele iqhelekile. Imveliso inyuke ngokukhawuleza. Nangona kunjalo, isithando somlilo kunye nesisu sokubola ngokucacileyo kuchaphazela ukuveliswa kwesithando somlilo seRuo. Inkqubo yokuveliswa kwezitena eziphezulu zealumni kunye nezitena zodongwe ezininzi ziyafana. Umahluko kukuba inani le-clinker kwizithako liphezulu.

Izitena zokuqhumisa izitena eziphezulu zealumumina zibhekisa kwiimveliso ezinqabileyo ezenziwe nge-alumina bauxite clinker enomxholo we-Al2O3 ongaphezulu kwe-48% kwaye isetyenziselwa ukwakha umlilo.

Isithando somlilo sesona sixhobo siphambili sokwenza i-ironmaking, kunye nezitena zodongwe zizinto zokufakelwa ezisetyenziswe kwangoko kakhulu kwiziko lokuqhushumba. Ukuqala ngee-1950s, umthamo weeflast blast ukhule waya kwinqanaba elikhulu, kwaye i-8-12m yeziko lobushushu sele iqhelekile. Imveliso inyuke ngokukhawuleza. Nangona kunjalo, isithando somlilo kunye nesisu sokubola ngokucacileyo kuchaphazela ukuveliswa kwesithando somlilo seRuo.

Umsebenzi wobugcisa:

Inkqubo yokuveliswa kwezitena eziphezulu zealumni kunye nezitena zodongwe ezininzi ziyafana. Umahluko kukuba inani le-clinker kwizithako liphezulu, elinokuthi libe phezulu njenge-90-95%. I-clinker kufuneka ihlelwe kwaye isuswe ukuze isuse i-iron ngaphambi kokutyunyuzwa, kwaye iqondo lokudubula liphezulu, njenge-Ⅰ, Ⅱ izitena eziphezulu ze-alumina zihlala zi-1500 ～ 1600 ℃ xa zidutyulwa kwitonela yethonela.

Ukuziqhelanisa nemveliso e-China kungqinile ukuba ngaphambi kokutyunyuzwa, i-high-aluminium clinker ihlelwe ngokungqongqo kwaye yahlelwa, kwaye igcinwe kumanqwanqwa. Ukusetyenziswa kwe-bauxite clinker kunye nodongwe oludityanisiweyo lokugaya indlela inokuphucula umgangatho wemveliso.

ukusebenza:

a. Ukujonga kwakhona

Ukuphindaphindwa kwezitena zealuminium eziphakamileyo kunezitena zodongwe kunye nezitena ezinesilica, ezifikelela kwi-1750 ~ 1790 ℃, eyinto ekumgangatho ophezulu yokuphamba.

b. Layisha ubushushu obuthambileyo

Ngenxa yokuba iimveliso zealumina eziphezulu zineAl2O3 ephezulu, ukungcola okuncinci, kunye nemizimba yeglasi encinci enefusus, umthwalo othomalalisa ubushushu uphezulu kunowezitena zodongwe. Nangona kunjalo, ngenxa yokuba amakristali e-mullite engenzi ubume benethiwekhi, ubushushu obuthomalisayo bomthwalo abukho njengobude bezitena zesilica.

c. Ukuxhathisa kweSlag

Izitena eziphakamileyo ze-alumina zine-Al2O3 engaphezulu, esondeleyo kwizinto ezingathathi hlangothi, kwaye inokuxhathisa ukhukuliseko lwe-slag ene-acid kunye ne-alkaline slag. Ngenxa yokubandakanywa kwe-SiO2, ukubanakho ukumelana ne-alkaline slag kubuthathaka kunaleyo ye-acidic slag.

Amanqaku enkqubo:

Izinto zendalo zebauxite zifuna ukubalwa kakuhle kunye nokuhlelwa okungqongqo. Umxholo we-iron oxide kuhlalutyo lweekhemikhali ulawulwa ngezantsi kwe-1.2%, kwaye akukho ndawo zixineneyo zentsimbi okanye ii-cores zentsimbi ezivunyelweyo. Kufuneka inqanaba eliphezulu kunye nococeko oluphezulu. Ukubunjwa ngomatshini wokushicilela wezitena ophezulu, ubume besitena buqhelekile, kwaye akukho ndawo yokuqhekeka komnatha kunye ne-delamination yangaphakathi evunyelweyo. Qinisekisa uxinano lwezitena oluphezulu kunye neqondo lokudubula elingaphantsi kwe-1500 ℃.