Ob yam tseem ceeb cuam tshuam rau kev ua haujlwm ntawm cov khoom siv refractory

1. Tshuaj muaj pes tsawg leeg

Tshuaj muaj pes tsawg leeg ntawm cov ntaub ntawv refractory yog ib qho ntawm cov yam ntxwv ntawm cov khoom refractory. Cov ntaub ntawv refractory yog heterogeneous, uas yog tsim los ntawm cov khoom tseem ceeb thiab theem nrab. Cov khoom tseem ceeb feem ntau yog hu ua lub ntsiab lus tseem ceeb, thiab lwm qhov yog hu ua cov khoom me me. Sub-components yog cov khoom siv tsis muaj txiaj ntsig los yog tsis zoo rau lub hom phiaj ntxiv los txhim kho kev ua tau zoo ntawm cov khoom lag luam lossis kev ua yuam kev lossis tsis tuaj yeem coj mus rau hauv, feem ntau hu ua cov khoom ntxiv thiab cov khoom tsis huv. Cov ntsiab lus tseem ceeb feem ntau yog ib lossis ntau dua ntawm qhov siab melting point refractory oxides los yog cov ntxhia sib xyaw lossis cov tsis muaj oxides. Nws yog lub cev tseem ceeb ntawm cov khoom siv refractory, ncaj qha txiav txim siab cov txheej txheem ntawm cov khoom refractory kev ua tau zoo.

Cov khoom xyaw ntxiv yog feem ntau ua rau kev ua haujlwm ntawm daim ntawv thov, kev ua haujlwm tsis txaus lossis kev ua haujlwm ua haujlwm, feem ntau hu ua binder, mineralizing agent, stabilizer, sintering tus neeg saib xyuas thiab dej txo tus neeg sawv cev, tus neeg sawv cev tiv thaiv dej, coagulant, expansion agent, thiab lwm yam. yog ntau yam sib txawv ntawm additives thiab yog tam sim no lub hom phiaj ntawm refractory kev lag luam kev tshawb fawb. Lawv cov yam ntxwv zoo sib xws yog:

1) qhov sib ntxiv yog tsawg heev;

2) Nws tuaj yeem pom tseeb hloov qee qhov haujlwm lossis cov yam ntxwv ntawm cov khoom siv refractory;

3) Nws tsis muaj qhov cuam tshuam loj rau cov khoom tseem ceeb ntawm cov khoom.

Cov impurity tivthaiv yog hais txog qhov uas tau coj los yog sib xyaw rau hauv cov txheej txheem tsim khoom vim tias tsis muaj purity ntawm cov khoom siv raw thiab muaj qhov tsis zoo rau kev ua haujlwm ntawm cov khoom siv refractory. Feem ntau hais lus, KO, NAO thiab FeO yog teeb meem impurities hauv refractories.

Tsis tas li ntawd, cov kua qaub oxides nyob rau hauv alkaline refractories thiab alkaline oxides nyob rau hauv acidic refractories raug suav hais tias yog teeb meem impurities, thiab lawv muaj zog flux nyhuv ntawm qhov kub thiab txias. Cov nyhuv no txo ​​qhov kub ntawm eutectic kua theem thiab ua kom cov kua theem generated, thiab nce tus nqi ntawm cov kua theem nce nrog kub, uas cuam tshuam rau qhov kub thiab txias kev ua tau zoo ntawm cov khoom refractory.

2. Mineral Composition

Cov khoom siv refractory yog cov ntxhia muaj pes tsawg leeg. Cov khoom ntawm cov khoom yog qhov kev xav txog ntawm lawv cov minerals thiab microstructure. Yog li ntawd, thaum soj ntsuam cov nyhuv ntawm cov khoom muaj pes tsawg leeg ntawm cov khoom ntawm lawv cov khoom, nws tsis yog txaus los soj ntsuam thiab tshawb xyuas qhov teeb meem tsuas yog los ntawm kev xav ntawm cov tshuaj muaj pes tsawg leeg, tab sis es tsis txhob maj soj ntsuam cov tshuaj thiab ntxhia muaj pes tsawg leeg. Cov ntaub ntawv refractory, nyob rau hauv cov xwm txheej ruaj khov ntawm cov tshuaj muaj pes tsawg leeg, vim qhov tsis sib xws ntawm cov khoom sib txawv thiab kev siv tshuab, yog tsim los nrog ntau yam muaj pes tsawg leeg ntawm cov pob zeb hauv av, tus lej, qhov loj me, lub xeev ntawm kev sib xyaw ntawm cov ntxhia sib txawv, thiab. qhov sib txawv microstructure, uas ua rau tag nrho cov kev ua tau zoo ntawm cov khoom. Piv txwv li, cov khoom siliceous nrog tib tus nqi ntawm SiO2, tuaj yeem tsim ob hom minerals nrog cov qauv sib txawv thiab cov khoom - squamous quartz thiab quartzite txawm nyob rau hauv tib txoj kev mob, yog li cov khoom sib txawv ntawm cov khoom. Txawm hais tias cov ntxhia muaj pes tsawg leeg ntawm cov khoom yog qhov tseeb, cov khoom ntawm cov khoom yuav cuam tshuam loj heev los ntawm qhov sib txawv ntawm cov nplej, cov duab thiab kev faib tawm ntawm cov ntxhia theem.