MOLD CORE MATERIALS CASTING AREA Mingxi Jinfeng Silicon Industry Co Ltd China A World renowned manufacturer of various materials for foundry industry colloidal silica mullite sand and powder Silica Quartz Olivine Chromite and Zircon Sand Fused Fumed Silica Nano Colloidal Silica Powders for Investment Casting Resin coated Precoated Sand for Shell Moulding