Gulu la njerwa zotha kupuma (3)

(Chithunzi) GW mndandanda anatumbula mtundu kupuma njerwa

Njerwa permeable akhoza kugawidwa mu corundum-spinel dongosolo mpweya mpweya njerwa, corundum-chromium okusayidi dongosolo mpweya njerwa, corundum-spinel dongosolo mpweya mpweya mpando njerwa ndi corundum-chromium okusayidi dongosolo mpweya mpweya mpando njerwa malinga ndi zipangizo zawo.

1 Corundum-spinel system njerwa zopumira

Chifukwa kukana kwa slag ndi kukana kwamafuta amtundu umodzi wa corundum castables sikoyenera, zinthu za spinel zimakhala ndi kukana kukokoloka kwa slag. Choncho, high-purity fused spinel imawonjezeredwa ku corundum castable kuti akwaniritse cholinga chowongolera ntchito ya corundum castable. Zopangirazo zimakhala ndi corundum zooneka ngati mbale, ndipo njerwa zowomberedwa ndi mpweya zomwe zimawotchedwa kutentha kwambiri ndi binder zimakhala ndi kukana kutenthedwa kwamafuta komanso kukana kwa slag.

2 Corundum-Chromium Oxide System Njerwa Zopumira

Pofuna kupititsa patsogolo kukana kwa chitsulo cha slag cha njerwa yodutsa mpweya, kuchuluka kwa chromium oxide micropowder kumawonjezeredwa pakupanga. Chopangira chachikulu ndi corundum chooneka ngati mbale, ndipo chromium oxide imawonjezeredwa ku corundum castable. Pa kutentha kwambiri, chromium oxide ndi aluminium oxide imapanga njira zotentha kwambiri zotentha, ndipo nthawi yomweyo zimapanga njira yokhazikika yokhazikika MgO · Cr2O3-MgO · Al2O3 ndi pang’ono magnesium oxide. The mamasukidwe akayendedwe a njira olimba ndi mkulu kwambiri, ndi dzimbiri ndi kukana Fe2O3 kapena slag kwambiri kumatheka, kotero kuti malowedwe ndi dzimbiri la zitsulo slag akhoza bwino kupewedwa pa kutentha kwambiri. Nthawi yomweyo, Cr2O3 yocheperako imathanso kuletsa kukula kwakukulu kwa Al2O3, kuchepetsa kupsinjika mu kristalo, ndikuwongolera mawonekedwe akuthupi. Komabe, ngati kuchuluka kwa kuwonjezereka kuli kwakukulu kwambiri, kukula kwa mbewu za corundum kudzalepheretsedwa mopitirira muyeso, ndipo kupsinjika kwa mkati kudzapangidwanso, motero kuchepetsa thupi la zinthuzo. Kuonjezera apo, mtengo wa Cr2O3 ndi wokwera kwambiri, kuwonjezera kwambiri kudzawonjezera mtengo wake, ndipo kudzakhala ndi zotsatira zina pa chilengedwe.

3 Corundum-spinel system yopumira mpando njerwa

The corundum-spinel system breathable seat njerwa ndizomwe zimagwiritsidwa ntchito kwambiri, ndipo zopangira zazikulu ndi corundum. Ubwino wake ndi wakuti spinel imakhala ndi mphamvu yolimbana ndi ma acid ndi alkalis, ndipo imakhala yosungunuka kwambiri yomwe imakhala ndi ntchito yabwino. Aluminiyamu-magnesium spinel imatsutsana kwambiri ndi slag ya alkaline, ndipo imakhala ndi zotsatira zokhazikika pazitsulo zachitsulo. Ikakhudzana ndi magnetite pa kutentha kwakukulu, idzachitapo kanthu kuti ipange yankho lolimba, ndipo kukana kwa kutentha kwapamwamba kwa njerwa yopuma mpweya kumatha kusintha; Nthawi yomweyo, yankho lolimba la MgO kapena Al2O3 spinel lili ndi kukana kwamphamvu kwamafuta chifukwa cha kusiyana kwa coefficient yowonjezera pakati pa mchere.

4 Corundum-Chromium Oxide System Breathable Block

The corundum-chromium oxide system breathable seat njerwa amapangidwa pamaziko a corundum-spinel system kuti apititse patsogolo kutentha kwapamwamba kwa njerwa yopumira. Zopangira zazikuluzikulu ndi tabular corundum, ndipo kachulukidwe kakang’ono ka ufa wa chromium okusayidi amawonjezeredwa. Ubwino wake ndikuti pamaziko a kuwongolera magwiridwe antchito a njerwa ndi spinel, njira yolimba yopangidwa ndi Al2O3-Cr2O3 ili ndi kuwonjezeka kwakukulu kwa kutukula kukana kwa iron oxide slag. Kuonjezera Cr2O3 yocheperako kumatha kulepheretsa kukula kwakukulu kwa makristasi a aluminiyamu, potero kuchepetsa makhiristo amkati. Kupsinjika, sinthani kukana kugwedezeka kwamafuta, kukana kukokoloka komanso kukana kukokoloka kwa njerwa yopumira.

Mawu omaliza

Ziribe kanthu momwe ntchito yogwiritsira ntchito pamalopo ndi yovuta bwanji, pogwiritsa ntchito zomwe zachitika kale komanso kusanthula koyeserera komwe kuli pamalopo, titha kupeza mtundu wa njerwa yopumira yomwe imakwaniritsa zofunikira pakusungunula pamalopo.