FIELD: fireproof fibrous materials soluble in salt solutions. SUBSTANCE: salt soluble fireproof filer comprises, mol.%: CaO, 15.39-19.68; MgO, 7.65-16.63; ZrO2, 1.7-9.15; SiO2, 62.25-68.91. Fiber bar prepared by vacuum casting has shrinkage of 3.5% or less when maintained at 1260 C. Fiber is fireproof at temperatures from 1000 to 1260 C for 24 h. EFFECT: improved properties of the fiber. 15 cl, 1 dwg, 3 tbl
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