Quicklime Raw Khoom

Nyob rau hauv qhov tseeb ntau lawm, kom ceev decomposition, calcination kub feem ntau yog nce mus rau 1000-1100 degree. Vim qhov loj ntawm limestone raw cov ntaub ntawv los yog qhov kub tsis sib xws nyob rau hauv lub kiln thaum lub sij hawm calcination, quicklime feem ntau muaj underburned thiab overburned txiv qaub. Underburned txiv qaub muaj tsis tiav decomposed calcium carbonate, ua rau tsis muaj kev khi quab yuam thaum siv. Overburned txiv qaub muaj ib tug ntom qauv, feem ntau coated nrog ib txheej ntawm molten khoom, thiab melts heev maj mam. Vim tias cov khoom siv raw feem ntau muaj magnesium carbonate (MgCO3), quicklime kuj muaj magnesium oxide (MgO) ua cov khoom me me. Raws li tus nqi ntawm magnesium oxide, quicklime tau muab faib ua calcareous txiv qaub (MgO Tsawg dua lossis sib npaug li 5%) thiab cov txiv qaub magnesian (MgO> 5%).