Industrialization method for preparation of hollow glass beads based on precursor process

Abstract

The invention discloses an industrialization method for preparation of hollow glass beads based on precursor process. The production technology includes the steps of: 1) preparation of slurry: accurately weighing all components of basic raw materials, a stable dispersing agent and a surfactant; wherein the basic raw materials comprise quartz, borax, calcium carbonate, sodium carbonate, sodium sulfate and sodium phosphate; 2) preparation of a precursor; 3) preparation of hollow glass beads; and 4) surface modification. The stable dispersion slurry prepared by the method provided by the invention has high solid phase content and low surface tension and viscosity, the energy consumption of spray granulation is remarkably reduced, and also the prepared precursor has small particle size span and uniform components, the floating rate of the hollow glass beads can be higher than 96% through combination with a high-temperature negative-pressure vitrification process, and low-temperature circulating air is employed to reinforce the hollow glass bead. The method provided by the invention adopts dry surface modification, has no need for drying again, broadens the application fields of the hollow glass beads while simplifying the technological process, and solves the problem of narrow application field of hollow glass beads.

Description

technical field [0001] The invention belongs to the technical field of preparation of hollow glass microspheres, and in particular relates to a method for preparing hollow glass microspheres using a precursor method. The produced hollow glass microspheres can be widely used in coatings, glass fiber reinforced plastics, oil and gas field exploitation, and epoxy / unsaturated resins. Nitrile, phenolic, acrylic and other coatings, as well as the production of inks, adhesives, sealants, emulsion explosives and other products. Background technique [0002] Hollow glass microspheres are hollow micron-sized spherical particles, which have excellent characteristics such as low density, high strength, low thermal conductivity, sound insulation, high melting point, strong stability, and good fluidity. It makes it an excellent modified material and endows the substrate with multiple functions, so it is widely used in petroleum, military industry, building materials, automobiles, plastics...

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Problems solved by technology

The production method of 3M Company in the United States is a solid-phase powder method, as described in patents US4391646, US3365315, and WO2017 / 040900 A1. The prepared hollow glass microspheres have high performance and good chemical stability, but the process is complicated, the floating rate is low, and energy consumption is low. High; the production method of PQ Company is a liquid phase atomization method, as described in patents US3794503 and US3796777, the process is simple, the energy consumption is low, and the floating rate is high, but the raw materials are limited, and the prepared hollow glass microspheres have low strength and are easy to Agglomeration; the performance of the hollow glass microspheres prepared by the soft chemical method is between the solid phase powder method and the soft chemical method, and the process is simple, but there are disadvantages such as excessive fuel cost and easy agglomeration

In order to improve the strength and floating rate of hollow glass microspheres (HGMs), relevant domestic enterprises and research institutions have improved the process or formula in surface modification and other aspects, but there are still high raw material costs, complicated processes, wide particle size distribution, Disadvantages such as low strength

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