Njerwa zosagwira kuvala

Njerwa za phosphate zolimba zotsekemera zotchedwa aluminiyumu zimatchedwanso kuti phosphate zosavala njerwa zosavala njerwa. Njerwa za phosphate zosavala ndi mtundu wa zida zotsitsimutsa, zomwe ndizapamwamba kwambiri za bauxite clinker kapena yankho lolimba la phosphoric acid monga chopangira chachikulu, kapena aluminiyamu phosphate binder, Pambuyo poumirizidwa ndikupangidwa ndi makina owuma, amathandizidwa ndi kutentha pa 400-600 ℃ kupanga mankhwala omwe ali ndi zotsutsana. Zimaphatikizidwa ndi njerwa. Pofuna kupewa kuchepa kwakukulu mukamagwiritsa ntchito mankhwalawa kutentha kwambiri, zosakaniza nthawi zambiri zimafunikira kuyambitsa zowonjezera zowonjezera, monga kyanite, sillimanite, pyrophyllite, ndi silicon carbide. Sintered ndi njerwa zapamwamba za alumina ndi ziwiya zadothi, kukana khungu ndikwabwino, koma kutentha kocheperako ndikotsika komanso kukana kwa dzimbiri, chifukwa chake pangakhale kochulukirapo ka corundum, mullite, ndi zina zambiri. Kutengera fosforasi asidi ndi fosforasi asidi osagwirizana njerwa, njerwa za refractory zopangidwa ndi njerwa wamba zapamwamba za alumina kudzera paukadaulo wapadera ndi zowonjezera zamagetsi zathandizira kwambiri kukana kwa abrasion ndikutentha kwanyengo, kuposa njerwa zapamwamba za alumina, mphamvu yabwino, kuzirala mwachangu komanso kutentha kwakanthawi, Kugonjetsedwa ndi dzimbiri ndi kumva kuwawa. Maonekedwe ake ndi apamwamba kuposa njerwa zapamwamba za alumina m’makina oyenda simenti.

Zochita:

(1) Kutentha kosagwira magwiridwe antchito ndibwino, kutentha kotsutsa ndikokulirapo kuposa madigiri 1770, kumatha kupirira kutentha kocheperako, komanso kusinthasintha kwa kutentha sikukhudza kwenikweni.

(2) Kutentha kwabwino kwambiri, kukana kuzizira komanso kutentha kwanyengo, ndipo palibe kuyimitsa kapena kusenda pakusintha kwa kutentha.

(3) Kukana kwamankhwala, palibe ming’alu ndi khungu lomwe lingachitike mumlengalenga wa Co kutentha kwa 400-600 ° C.

(4) Kukana kwabwino komanso mphamvu yayikulu.

Njerwa za phosphate zadziwika kuti njerwa zapamwamba kwambiri zopangira ma simenti ndi ma kilimu a mandimu.

Pali mitundu iwiri ya njerwa za phosphate zolimba kwambiri: imodzi ndi njerwa za phosphate-high-alumina njerwa (zotchedwa njerwa za phosphate), ndipo inayo ndi njerwa za phosphate-high-alumina (zomwe zimatchedwa njerwa zosagwira).

Njerwa za phosphate zimagwiritsa ntchito njira ya asidi ya phosphoric yokhala ndi 42.5% mpaka 50% ngati binder, ndipo gulu lonse la bauxite clinker limapangidwa potentha pamwamba pa 1600 ° C mu uvuni wozungulira. Pogwiritsira ntchito njerwa, phosphoric acid imagwirana ndi ufa wabwino wa bauxite mu njerwa kuti ichitane ndi dongo lonyenga, ndipo pamapeto pake limapanga cholumikizira chomwe chimapangidwa ndi cristobalite aluminium orthophosphate. Njerwa zosavala zimagwiritsa ntchito phosphoric acid ndi mafakitale a aluminium hydroxide kukonzekera njira ya aluminium phosphate ngati binder. Kuchuluka kwake kwa molar ndi Al2O3: P2O5 = 1: 3.2. Magulu onse omwe amagwiritsidwa ntchito ndi ofanana ndi a njerwa za phosphate. Pogwiritsira ntchito njerwa, monga phosphate, binder yochokera ku cristobalite-aluminium orthophosphate imapangidwa.

Njerwa za phosphate ndizoyenera pakamwa pamoto pakasinthidwe kazitsulo mozungulira ndi madera ena pomwe njerwa sizivuta kuwerako, ndipo ndiyopindulitsanso malo owombera. Amagwiritsidwanso ntchito pamakina a shaft, ma kilimu a laimu, makina oyatsira makina a kaboni, ndi zina zambiri.

Kuchita kwazinthu: Ili ndi mawonekedwe a mphamvu yayikulu pompopompo kutentha, kutentha kwabwino kwamphamvu, kutentha kwambiri, kutentha kolondola, kuchuluka kwakanthawi, komanso kukana kwabwino.

Zizindikiro zakuthupi ndi zamagetsi za njerwa za phosphate: