Njerwa yozungulira ya simenti yopingasandi chinthu chofunika kwambiri pakupanga simenti yozungulira. Monga gawo lofunika kwambiri loteteza makina a uvuni, limakhudza mwachindunji kukhazikika kwa zida, kugwiritsa ntchito bwino mphamvu komanso moyo wonse wa ntchito. Ma uvuni a simenti amagwira ntchito m'mikhalidwe yovuta kwambiri yokhala ndi kutentha kwambiri kosalekeza, kutentha kosinthasintha, kusweka kwa makina ndi dzimbiri la alkali, zomwe zimapangitsa njerwa zapamwamba kukhala zofunika kwambiri popanga clinker yokhazikika.
Malo ogwirira ntchito ovuta amafuna ntchito yabwino kwambiri kuchokera ku njerwa zosagwira ntchito. Zogulitsa zapamwamba zimakhala ndi kukana kutentha kwambiri, zimapirira kutentha kopitirira 1350°C popanda kusintha kapena kuwonongeka kwa kapangidwe kake. Zimaperekanso kukana kutentha kwambiri, kukana ming'alu ndi kuphulika komwe kumachitika chifukwa cha kusintha kwa kutentha nthawi zambiri panthawi yoyatsa uvuni, kuzimitsa moto komanso kugwira ntchito tsiku ndi tsiku.
Njerwa zofewa izi zimakhala ndi mphamvu yolimbana ndi dzimbiri ya mankhwala motsutsana ndi zinthu za alkaline, mankhwala a sulfure ndi slag ya clinker yomwe imapangidwa mu calcination, zomwe zimathandiza kupewa kuwonongeka kwa lining ndi kukalamba msanga. Mphamvu zawo zazikulu zamakaniko ndi kukana kukalamba zimapirira kukangana kosalekeza ndi kukakamizidwa kuchokera ku zipangizo zopangira ndi clinker, zomwe zimapangitsa kuti uvuni uzigwira ntchito kwa nthawi yayitali komanso mokhazikika.
Mitundu yosiyanasiyana ya njerwa zopingasa imapangidwa kuti igwire ntchito mu uvuni wogawika m'magulu.
Njerwa zokhala ndi aluminiyamu yambiri zimagwirizana ndi malo otenthetsera ndi osinthira omwe ali ndi ma porosity ochepa, mphamvu yotentha kwambiri komanso kugwiritsa ntchito bwino ndalama.
Njerwa za Magnesia-spinel ndi zabwino kwambiri pa malo oyaka moto chifukwa cha kukhazikika kwa kutentha komanso kukana kwa alkali.
Njerwa zoletsa kuchotsedwa zimayikidwa m'malo omwe kutentha kumasinthasintha kuti zisagwedezeke ndikuwonjezera nthawi ya moyo wa mkati.
Njerwa zozungulira za simenti zapamwamba kwambiri zimapangitsa kuti zomera za simenti zikhale ndi phindu lalikulu pazachuma.
Amachepetsa kutayika kwa kutentha, amawonjezera mphamvu ya kutentha ndi 5%-10% komanso amachepetsa ndalama zamafuta. Kulimba kwawo kwambiri kumachepetsa nthawi yosinthira ndi kukonza, amachepetsa nthawi yogwira ntchito ya uvuni ndipo amawongolera kwambiri magwiridwe antchito onse opanga.
Mwachidule, njerwa zapamwamba zosasunthika ndizofunikira kwambiri popanga simenti bwino. Kukhazikika kwawo kodalirika komanso kutentha kwambiri, kukana dzimbiri komanso kulimba kumatsimikizira kuti ma uvuni ozungulira simenti amagwira ntchito bwino, moyenera komanso motchipa.
Mukufuna njerwa zolimba komanso zogwira ntchito bwino za simenti yozungulira yolimba?
Timapereka njira zosinthira zinthu zomwe zimapangidwa mwamakonda zomwe zimagwirizana ndi mitundu yosiyanasiyana ya uvuni ndi momwe ntchito ikuyendera. Zogulitsa zathu zimagwiritsidwa ntchito kwambiri m'mafakitale apadziko lonse lapansi a simenti okhala ndi khalidwe lokhazikika, mitengo yopikisana komanso chithandizo chaukadaulo chaukadaulo.
Lumikizanani nafe lero kuti mupeze magawo aulere azinthu, mayankho apadera komanso mitengo yaposachedwa ya fakitale.
Nthawi yotumizira: Julayi-02-2026
