Kodi zopangira ndi za chiyani njerwa zaumbali?

Pali mitundu yambiri ya zida zopangira njerwa zomangira. Kuchokera kumaganizo a mankhwala, zinthu zonse ndi zowonjezera zomwe zimakhala ndi malo osungunuka kwambiri zingagwiritsidwe ntchito ngati zipangizo; kuchokera ku mineralological point of view, mchere wonse wapamwamba kwambiri ungagwiritsidwe ntchito ngati zopangira njerwa refractory. Ndi zinthu ziti zopangira njerwa zowumbidwa, zomwe zimagawidwa kukhala: dothi, miyala, mchenga, silty ndi ena.

(1) Dothi labwino: kaolin, dongo ndi diatomite

(2) Ubwino wa miyala: bauxite, fluorite, kyanite, andalusite, sillimanite, forsterite, vermiculite, mullite, chlorite, dolomite, magnesia alumina spinel ndi silika, Cordierite, corundum, coke mwala wamtengo wapatali, zircon

(3) Ubwino wa mchenga: mchenga wa quartz, mchenga wa magnesia, ore chrome, etc.

(4) Ufa wabwino: ufa wa aluminiyamu, ufa wa silicon, ufa wa silicon

(5) Zina: phula, graphite, phenolic resin, perlite, mikanda yoyandama, galasi lamadzi, silika sol, simenti ya calcium, shale ceramsite, aluminium sol, silicon carbide, dzenje lozungulira.