Foundry sand hta madung hku nna lawu na amyu ni lawm ai:
1.Silica nhpu: Madung mineral n-gun gaw SiO2 rai nga ai.Silica nhprang hpe shingra tara silica nhprang,lata la ai shingra tara nhprang hte shinggyim masha ni galaw ai nhprang ngu nna bai garan mai ai. Natural silica nhprang hpe n-hprang n-gun n-rawng ai n-gun n-gun n-rawng ai n-gun n-gun n-rawng ai nhprang rai ni, n-gun n-rawng ai n-gun kaji ni hte n-gun n-gun n-rawng ai nhprang arai ni hpe jai lang na matu n-gun n-gun hte core nhprang hku lang ai. nhprang wan hte nhprang wan
2.Non siliceous sand: dai hta quartz nlung, limestone nlung,etc zawn re ai amyu myu lawm ai.Quartz nlung gaw quartz nlung hpe madung raw material hku nna htu nna shapraw ai granular nhprang arai langai mi rai nna, nsam hpraw ai (sh) n-gun n rawng ai nsam rawng ai. Dai hpe n-gun dat ai, wan n hkru ai arung arai.metallurgy.chemical industry hte kaga lam ni hta lang ai. Limestone nhprang hpe limestone hpe htu nna galaw ai,dai hta madung mineral n-gun gaw CaCO 2 rai nga ai.3.Dai hpe n-gang htu shapraw na matu nhprang wan hte core nhprang hku nna lang ai.Dai hta n-ga,chromite nhprang,olivine nhprang ,bead nhprang ni nga ai. etc.
3.Special sand: silica sand a high-temperature performance gaw lang na matu ra kadawn ai lam ni hpe n lu galaw ai shaloi,zircon sand,chromite sand hte corundum sand zawn re ai laksan sand ni hpe lang ai.Ga shadawn, zircon sand,dai a mineral madung gaw ZrO 2 rai nga ai.2, hpe nhprang wan n-gun kaba ni hte nhprang n-gun kaba ni a matu nhprang wan n-gun (sh) nhprang n-gun n-gun (sh) nhprang n-gun n-gun kaba ni a matu lang ai.2O3.Corundum nhprang wan hta lawm ai madung nhprang sut rai gaw - A .l2O3,dai hpe gumhpraw bang ai hte ceramic mold galaw na matu shell arung arai hku nna lang ai.
Dai majaw, n bung ai casting sand amyu myu nga ai, casting sand amyu myu gaw casing galaw ai lam amyu myu hte casting amyu myu a matu htuk manu nga ai.Casting sand hpe lata ai shaloi, casting ra kadawn ai lam ni hte masa lam ni hpe hkan sa ra ai.
Anhte gaw - manu dan ai mullite htu shapraw ai nhpu, htu shapraw ai muk hte htu shapraw ai nhprang wan hpe galaw shapraw nna maigan de dut shabra ga ai
