The invention discloses a method for preparing
foam glass with a high foaming rate by utilizing a lead-free high-
barium abandoned lamp tube and belongs to the field of
foam glass. The method comprises the following steps: carrying out ball milling on the lead-free high-
barium abandoned lamp tube to form a glass
powder raw material; feeding foaming agents, namely
manganese dioxide and
calcium carbonate, a fluxing agent, namely
sodium fluorosilicate, and a stabilizer, namely
sodium phosphate into a
ball mill to be subjected to ball milling; feeding mixture obtained through ball milling into a high-temperature-resistant mould, preheating for 15-20 minutes at the temperature of 400-430 DEG C, then heating up to 800-820 DEG C, and carrying out heat preservation for 20-30 minutes; then cooling to 500-550 DEG C, annealing, and carrying out heat preservation for 35-40 minutes; and finally carrying out furnace cooling to
room temperature. The prepared
foam glass is uniform in
pore diameter, closed pores are formed mainly, the average
pore diameter reaches about 4.2mm, the density is 0.58g / cm<3>, the
compressive strength is 3.78MPa, the performance is excellent, and the application standard of the foam glass can be met.