Dab tsi ntawm cov khoom siv refractory feem ntau yog siv hauv steelmaking

Steelmaking feem ntau yog siv cov khoom siv semi-acidic raw khoom (feem ntau yog fireclay): hauv kev faib tawm yav dhau los, av nplaum tau teev nyob rau hauv cov khoom siv acidic, uas yog qhov tsis tsim nyog. Lub acidity ntawm refractory raw cov ntaub ntawv yog raws li dawb silica (SiO2) raws li lub ntsiab lub cev, rau cov nram qab no yog vim li cas:

1. Vim hais tias raws li cov tshuaj muaj pes tsawg leeg ntawm fireclay thiab siliceous raw cov ntaub ntawv, cov dawb silica nyob rau hauv fireclay yog ntau tsawg tshaj li siliceous raw cov ntaub ntawv.

2. Vim hais tias muaj 30% mus rau 45% alumina nyob rau hauv dav dav fireclay, thiab alumina yog tsis tshua muaj dawb, nws yuav tsum tau ua ke nrog silica los ua kaolinite, txawm hais tias muaj me ntsis ntau tshaj silica, cov nyhuv yog me me heev.

3. Yog li ntawd, cov cuab yeej acid ntawm fireclay yog qhov tsis muaj zog ntau dua li cov khoom siv siliceous. Lub fireclay yog decomposed rau hauv dawb silicic acid thiab dawb alumina ntawm qhov kub thiab txias, tab sis nws tsis hloov pauv, thiab dawb silicic acid thiab dawb alumina yuav muab sib xyaw ua ke rau hauv quartz thaum nws tseem ua kom sov. Quartz muaj cov kua qaub zoo tiv thaiv alkaline slag, thiab vim qhov nce ntawm alumina nyob rau hauv cov av nplaum refractory, nws cov acidic tshuaj maj mam qaug zog, thaum lub alumina nce mus txog 50%, yuav muaj alkaline los yog nruab nrab zog, tshwj xeeb tshaj yog cov av nplaum cib ua nyob rau hauv ultra- siab siab, siab ceev, nplua thiab compact, tsawg porosity

4. Kev tiv thaiv rau alkaline slag muaj zog dua silica nyob rau hauv qhov kub thiab txias. Nyob rau hauv cov nqe lus ntawm nws yaig, quartz kuj qeeb heev, yog li nws yog tsim nyog los faib fireclay li semi-acidic raw khoom. Fireclay yog cov khoom siv dav siv hauv kev lag luam refractory.