Feem ntau thaum siv phosphateyas castable, kua txhuas dihydrogen phosphate (kua txhuas phosphate) los yog iav dej (sodium silicate tov) tuaj yeem siv los ua kom sib haum. Cov additives no tuaj yeem txhim kho cov yas ntawm cov yas kom zoo dua li kev xav tau ntawm engineering.
Hluav taws kub-resistant yas castable yog ib hom yas tshwj xeeb uas feem ntau siv hauv kev tsim kho thiab kho hauv qhov chaw kub kub. Nws yog tsim los ntawm refractory aggregates, binders thiab additives, thiab muaj cov yam ntxwv ntawm kub tsis kam thiab corrosion kuj. Rau tempering ntawm refractory plastics, ib qho kev xyaum yog siv cov kua los yog khoom additives kom ua tiav qhov no.
Qee zaum, cov tshuaj hauv qab no tuaj yeem siv rau kev sib xyaw:
Cov kua dej ntxiv: Cov kua dej ntxiv feem ntau suav nrog kua sodium silicate (dej iav), kua txhuas dihydrogen phosphate, thiab lwm yam. Cov kua dej ntxiv no txhim kho kev sib raug zoo thiab plasticity ntawm cov yas castable, ua kom yooj yim rau kev thov thiab cov duab.
Khoom additives: Khoom additives muaj xws li ntau yam refractory aggregates, refractory fibers, thiab lwm yam. Cov additives no tuaj yeem txhim kho cov hluav taws kub thiab cov khoom siv hluav taws xob ntawm cov yas thiab txhim kho lawv cov stability thiab durability nyob rau hauv qhov kub thiab txias ib puag ncig.
Thaum sib tov, nws yog ib qho tsim nyog los xaiv cov additives tsim nyog raws li cov kev xav tau ntawm engineering thiab kev siv thiab sib tov rau hauv ib qho piv txwv kom ntseeg tau tias cov yas refractory muaj qhov yuav tsum tau ua thiab engineering zoo.
Yuav ua li cas mus cuag lub sij hawm cia ntawm phosphate yas castable?
Qhov ceev ntawm phosphoric acid yog 1.2 ~ 1.g / cm3, thiab nws cov koob tshuaj yog 1% ~ 1.5%. Qhov ntau npaum ntawm cov khoom txhuas phosphate thiab sodium hexametaphosphate yog 2% mus rau 6%, thiab cov additives suav nrog inhibitor oxalic acid. Nws qhov ntau npaum li cas yog 1.{{10}}% ~ 1.5%, thiab calcium lignosulfonate thiab hmoov txhuv nplej siab kuj siv, thiab nws qhov ntau npaum li cas yog 0.5% thiab 0.5% ~ 1.0% raws. Qhov sib xyaw ntawm phosphoric acid refractory yas yog 50% ~ 60% refractory aggregate, % ~ 35% refractory hmoov, thiab qhov sib xyaw ntawm phosphate huab cua-resistant qhob yog 60% aggregate, % ~ 35% refractory hmoov, mos av nplaum % ~ %, thaum siv, thawj zaug siv 60% phosphoric acid, aggregate hmoov thiab mos av nplaum los cuab cov khoom.
Nws yog nyob rau hauv daim ntawv ntawm ib tug tawv av nkos muab tshuaj txhuam thiab tswj siab plasticity rau lub sij hawm ntev. Nws muaj ntau cov av nplaum yas thiab muaj dej noo ntau dua li cov ntaub ntawv ramming. Nws muaj cov yas zoo ua ntej hardening thiab muaj qee lub zog tom qab hardening. Nws muaj cov khoom zoo sintering, qee qhov ntim ruaj khov thiab lwm yam khoom siv kub ntawm qhov kub thiab txias. Yuav ua tau rau hauv cov ntawv los yog blocks. Qee cov binders kuj tuaj yeem ntxiv thaum tsim kho. Thaum siv, qhov sib tov yog compacted los yog pounded, thiab tom qab ci, nws muaj peev xwm tsim ib tug ntom ntom thiab qauv.
Hauv kev tsim thiab kev tsim kho ntawm cov yas refractory castable, lub plasticity Performance index yog ib qho tseem ceeb heev, uas yog, nyob rau hauv ib lub sij hawm cia, lub viscoplasticity yuav tsum tau khaws cia siab kom pab tamping siv. Oxalic acid thiab citric acid feem ntau yog siv los ua preservatives hauv tsev thiab txawv teb chaws, tab sis tus nqi yog siab. Kev siv cov molasses ua cov khoom noj muaj txiaj ntsig zoo dua. Qhov sib xyaw ua ke ntawm tsib pawg yog qhov pib zoo ib yam. Lub refractory aggregate thiab hmoov yog ua los ntawm bauxite clinker, thiab Guangxi av nkos yog siv los ua tus neeg sawv cev. Ib pawg yog tov nrog av nplaum, thiab qhov fineness feem ntau yog 170 mesh, thiab lwm pab pawg yog 50 mesh. Tus neeg sawv cev khi yog aluminium sulfate thiab phosphoric acid los yog ua ke ntawm ob qho tib si. Refractory yas tov nrog molasses tuaj yeem txuas lub txee lub neej, uas yog qhov yooj yim ywj pheej ntawm hom thiab fineness ntawm av nplaum. Rau qhov sib xyaw binder ntawm phosphoric acid thiab aluminium sulfate, tsis ntxiv molasses, plasticity Performance index poob li ntawm 60% tom qab 2 lub hlis ntawm kev cia, thiab viscoplasticity yuav luag ploj tom qab 3 lub hlis. Tom qab ntxiv molasses thiab khaws cia rau 4 lub hlis, tus thawj plasticity Performance index yeej tseem nyob. Rau txhuas sulfate binder, tom qab ntxiv molasses thiab khaws cia rau plaub lub hlis, lub plasticity Performance index yeej tsis hloov, thiab poob mus txog 15% hauv 8 lub hlis. Kev tsim kho tseem ua tau.
Molasses muaj cov organic acids xws li oxalic acid, malic acid thiab succinic acid, uas txo cov phosphates thiab sulfates, yog li ncua lub txee lub neej ntawm refractory yas castable. Nyob rau tib lub sijhawm, nws muab cov ntaub qhwv thiab cov ntaub ntawv raw cov ntaub ntawv ua tiav ntau dua thiab lub sijhawm ntub dej, kom cov kev sib txuas thiab viscoplasticity tau ua tiav, ua rau kev txhim kho thiab txhim kho kev ua haujlwm kub.
