Phosphate castable yog hais txog castable ua ke nrog phosphoric acid lossis phosphate, thiab nws cov txheej txheem hardening yog cuam tshuam nrog hom binder siv thiab txoj kev hardening.
Tus binder ntawm phosphate castable tuaj yeem yog phosphoric acid lossis cov tshuaj sib xyaw ntawm aluminium dihydrogen phosphate uas tsim los ntawm cov tshuaj tiv thaiv ntawm phosphoric acid thiab aluminium hydroxide. Feem ntau, cov binder thiab aluminium silicate tsis ua haujlwm ntawm chav tsev kub (tshwj tsis yog hlau). Yuav tsum tau cua sov kom qhuav thiab ua kom cov binder khov thiab khi cov hmoov sib xyaw ua ke kom tau lub zog ntawm chav tsev kub.
Thaum siv cov tshuaj coagulant, tsis tas yuav ua kom sov, thiab cov hmoov magnesia zoo lossis cov cement alumina siab tuaj yeem ntxiv rau kom ua kom cov coagulation sai dua. Thaum ntxiv cov hmoov magnesium oxide zoo, nws teb sai nrog phosphoric acid los tsim, ua rau cov khoom siv refractory teeb tsa thiab tawv. Thaum ntxiv aluminate cement, cov phosphates uas muaj cov khoom gelling zoo, cov phosphates uas muaj dej xws li calcium monohydrogen phosphate lossis diphosphate raug tsim. Hydrogen calcium, thiab lwm yam, ua rau cov khoom siv condense thiab tawv.
Los ntawm cov txheej txheem ua kom tawv ntawm phosphoric acid thiab phosphate refractory castables, nws paub tias tsuas yog thaum qhov nrawm ntawm cov cement thiab cov khoom sib xyaw thiab hmoov refractory tsim nyog thaum lub sijhawm cua sov tuaj yeem tsim cov refractory castable zoo heev. Txawm li cas los xij, cov khoom siv refractory raw yooj yim coj mus rau hauv cov txheej txheem ntawm pulverization, pob milling thiab sib tov. Lawv yuav ua rau cov tshuaj cementing thiab tso tawm hydrogen thaum lub sijhawm sib tov, uas yuav ua rau cov refractory castable o, xoob cov qauv thiab txo qhov compressive zog. Qhov no tsis zoo rau kev tsim cov phosphoric acid thiab phosphate refractory castables.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-04-2021