Phosphate castable yog hais txog castable ua ke nrog phosphoric acid los yog phosphate, thiab nws cov txheej txheem hardening muaj feem xyuam rau hom binder siv thiab cov txheej txheem hardening.
Lub binder ntawm phosphate castable tuaj yeem yog phosphoric acid los yog tov ntawm aluminium dihydrogen phosphate tsim los ntawm cov tshuaj tiv thaiv ntawm phosphoric acid thiab aluminium hydroxide. Feem ntau, cov binder thiab aluminium silicate tsis hnov mob ntawm chav tsev kub (tshwj tsis yog hlau). Cov cua sov yuav tsum tau dehydrate thiab condense lub binder thiab khi cov hmoov sib sau ua ke kom tau lub zog ntawm chav tsev kub.
Thaum siv coagulant, cua sov tsis tas yuav tsum tau, thiab nplua magnesia hmoov lossis siab alumina cement tuaj yeem ntxiv kom nrawm coagulation. Thaum magnesium oxide nplua hmoov ntxiv, nws reacts sai nrog phosphoric acid los tsim, ua rau cov ntaub ntawv refractory teeb thiab tawv. Thaum aluminate cement ntxiv, phosphates nrog cov khoom zoo gelling, dej-muaj phosphates xws li calcium monohydrogen phosphate los yog diphosphate yog tsim. Hydrogen calcium, thiab lwm yam, ua rau cov khoom sib xyaw thiab tawv.
Los ntawm cov txheej txheem hardening ntawm phosphoric acid thiab phosphate refractory castables, nws yog paub tias tsuas yog thaum cov tshuaj tiv thaiv tus nqi ntawm cov cement thiab cov refractory aggregates thiab hmoov yog tsim nyog thaum lub sij hawm cua sov txheej txheem yuav ib tug zoo heev refractory castable tsim. Txawm li cas los xij, cov khoom siv refractory tau yooj yim coj mus rau hauv cov txheej txheem ntawm pulverization, pob milling thiab sib tov. Lawv yuav hnov mob nrog cov cementing tus neeg sawv cev thiab tso tawm hydrogen thaum sib tov, uas yuav ua rau cov refractory castable swell, xoob cov qauv thiab txo cov compressive zog. Qhov no tsis zoo rau kev tsim cov phosphoric acid thiab phosphate refractory castables.
Post lub sij hawm: Nov-04-2021