Brown jade, dzina wamba amadziwikanso kuti diamondi mchenga, ndi munthu bulauni creted ndi aluminiyamu, carbon zinthu, ndi zipangizo zitatu zopangira kuti amasungunuka ndi kuchepetsedwa mu ng'anjo magetsi arc, choncho ndi dzina.Zosakaniza zazikulu za mankhwala a yade ya bulauni ndi Al2O3, ndipo zomwe zili ndi 95.00% -97.00%, ndipo palinso pang'ono pang'ono Fe, Si, Ti, etc. Yade ya bulauni ndiyomwe imayambitsa abrasive kwambiri, chifukwa ntchito yake yopera ndi zabwino, zambiri zogwiritsira ntchito, ndizotsika mtengo, ndipo zimagwiritsidwa ntchito kwambiri.
Yade ya bulauni ndiye zopangira zazikulu zokhala ndi aluminiyamu zotayidwa, coke (anthracite), ndipo zimakhala ndi kutentha kwambiri kusungunuka mung'anjo yamagetsi yamagetsi.Ndi oyenera akupera zitsulo mkulu, monga zosiyanasiyana wamba zitsulo., Angathe kupangira chitsulo chosungunula, mkuwa wolimba, ndi zina zotero, amatha kupanganso zopangira zapamwamba.Brown grungy ali ndi makhalidwe a chiyero chapamwamba, crystallization yabwino, fluidity yamphamvu, coefficient yowonjezera ya waya, ndi kukana kwa dzimbiri.Ndi ambiri opanga zosagwira moto, mankhwalawa ali ndi mawonekedwe a kuphulika, osapaka ufa, komanso osasweka pogwiritsira ntchito.Makamaka, ndi apamwamba kwambiri kuposa mtengo-mwachangu wa chikhalidwe bulauni jasteas, zomwe zimapangitsa kuti bwino akaphatikiza ndi filler bulauni yade refractory zipangizo.
