Preparation method of expanded vermiculite foam glass insulating material

The invention discloses a preparation method of an expanded vermiculite foam glass insulating material. The preparation method comprises the steps of taking natural mineral vermiculite and waste glass as primary materials; taking water glass as a foaming agent and a binder; doping a proper amount of auxiliary additive; ball-milling, pre-heating, sintering, foaming, cooling and annealing to obtain the expanded vermiculite foam glass insulating material. The foam glass insulating material is good in pore structure, light in weight, low in water absorption, small in heat conductivity coefficient, good in heat preservation effect, heat insulation effect and flame retardant efficiency, wide in material source, easy to obtain the materials, low in cost, energy-saving and environment-friendly, wide in development prospect, and is an ideal building insulating material; and the combustion performance can achieve level A.