Mkulu zotayidwa mbedza njerwa

Ubwino wazogulitsa: kutentha kotsika, kutentha kwa dzimbiri, kukhazikika kwamphamvu kwamatenthedwe

Mafotokozedwe Akatundu

Njerwa zotsekemera zopangidwa ndi aluminiyamu yayikulu yokhala ndi alumina yomwe ili pamwamba pa 48% ndizopanda mbali zotsalira. Amapangidwa ndikupangidwa kuchokera ku bauxite kapena zinthu zina zopangira zokhala ndi alumina zambiri. Njerwa zotsekemera kwambiri zimakhala ndi matenthedwe otentha, ndipo mawonekedwe awo amakhala pamwamba pa 1770 ℃. Kukana kwa slag kuli bwino.

Ntchito yopanga njerwa zapamwamba za alumina komanso njerwa zadothi zingapo ndizofanana. Kusiyanitsa ndikuti kuchuluka kwa clinker muzopanganso ndikokwera, komwe kumatha kukhala 90-95%. Choponyeracho chimafunika kusanjidwa ndikuchotsedwa kuti chisiye chitsulo chisanaphwanye, ndipo kutentha kotentha Kwambiri, monga Ⅰ, Ⅱ njerwa zapamwamba za alumina nthawi zambiri zimakhala 1500 ～ 1600 ℃ zikawotchedwa mu uvuni wanjira.

Zizindikiro zakuthupi ndi zamankhwala

Udindo / Index	Njerwa zapamwamba za alumina	Secondary mkulu alumina njerwa	Atatu milingo alumina njerwa	Njerwa zapamwamba kwambiri za alumina
Udindo / Index	LZ-75	LZ-65	LZ-55	LZ-80
AL203 ≧	75	65	55	80
Fe203%	2.5	2.5	2.6	2.0
Kuchulukana kachulukidwe g / cm2	2.5	2.4	2.2	2.7
Kuponderezana kwamphamvu kutentha kwa firiji MPa>	70	60	50	80
Katundu wofewetsa kutentha ° C	1520	1480	1420	1530
Kutulutsa kotsutsa ° C>	1790	1770	1770	1790
Zikuoneka porosity%	24	24	26	22
Kutentha kwamuyaya kwa kusintha kwa mzere%	-0.3	-0.4	-0.4	-0.2