Tam sim no, qhov tshwm sim ntawm ntau yam ntaub ntawv tseem tuaj yeem ua tau raws li qhov xav tau ntawm kev lag luam loj. iav muajsodium hexametaphosphatemaj mam yaj hauv dej, yog li ntawd, siv los ua cov khoom siv refractory tom qab crushed rau hauv cov hmoov binder thaum xav tau kom ceev nws cov kev sib cais, nws tuaj yeem ua tau ib qho kev faib ua ke nrog dej, cia cov khoom siv refractory vim nws cov khoom siv hluav taws xob zoo thiab ua cov neeg to taub cov khoom siv. Raws li qhov tshwm sim, cov neeg siv khoom lag luam tseem yuav tsum paub txog cov txheej txheem cuam tshuam thaum xaiv cov khoom siv:

1. Refractoriness ntawm cov ntaub ntawv

2. Compressive lub zog ntawm cov khoom

Qee lub tuam txhab xaiv cov ntaub ntawv refractory, tsis tsuas yog xav txog cov refractoriness, tab sis kuj yog cov refractoriness thiab kub tsis kam, compressive zog ntawm cov ntaub ntawv.

Sodium hexametaphosphateyog cov khoom siv refractory tshiab nrog cov khoom zoo hauv phosphate. Zoo thermal shock stability, siab compressive zog, slag corrosion kuj thiab cuam tshuam tsis kam, nrog siab softening kub nyob rau hauv load thiab tshuaj stability. Nws siv kub nyob ntawm ntau yam thiab qib ntawm cov ntaub ntawv raw, ntawm 1000 ~ 1800 ℃. Raws li qee qhov siv cov khoom siv magnesium li refractory aggregate thiab hmoov, ntau yuav siv kev lag luam sodium hexametaphosphateua binder.