Method for preparing hollow glass beads through waste glass

Abstract

The invention discloses a method for preparing hollow glass beads through waste glass. The method includes the following steps that a, the waste glass, water, stabilizing agents and foaming agents are mixed and subjected to ball milling, and waste glass powder slurry with the high solid phase content is prepared; b, the waste glass powder slurry is directly conveyed to a bead forming furnace by a conveying pump to be dried and hollowly balled; c, the products obtained through heating of the bead forming furnace are collected, and then the hollow glass beads are separated with a float method. According to the preparing method, the waste glass serves as main raw materials, the slurry is directly and hollowly balled, the glass high-temperature melting process in a glass powder method is avoided in the technology, and meanwhile the step that the slurry is prilled into precursors with a spray prilling method is omitted. The method is short in technological process and low in energy consumption, the prepared cost of the hollow glass beads is greatly reduced, and the situation that due to high cost, the application of the hollow glass beads is limited can be easily broken through.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic lightweight fillers, in particular to a method for preparing hollow glass microspheres by using industrial waste glass. Background technique [0002] Hollow glass microsphere is a kind of artificially prepared tiny spherical glass powder with a diameter of several microns to hundreds of microns, which is hollow and contains inert gas. It is an inorganic non-metallic material, which has the advantages of light weight, large volume, low thermal conductivity, high compressive strength, good dispersion, fluidity and stability. It also has low oil absorption, insulation, self-lubricating, sound insulation, non-absorbent, Fire resistance, corrosion resistance, radiation protection, non-toxic and other excellent properties that some ordinary materials do not have, so its use involves many fields, known as "the king of composite materials", "space materials in the new era", "magic powder"...

AI Technical Summary

Problems solved by technology

The spray granulation method (soft chemical method) uses chemical products as the main raw materials, and its preparation raw materials are very expensive, resulting in very high cost of the prepared hollow glass microspheres. In addition, the hollow glass microspheres prepared by the spray granulation method have high alkalinity, chemical Poor stability and low strength; while the glass powder method uses minerals as the main raw material, but requires two high energy-consuming processes, one is the melting of the prepared glass powder, and the other is the hollow spheroidization of the glass powder, resulting in the cost of hollow glass microspheres It also increases accordingly. In addition, as described in the No. 200910185799.5 patent application, its preparation process steps are cumbersome, which increases the difficulty of process control

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