Hollow glass microballoons and production method thereof

Abstract

The invention relates to hollow glass microballoons and a production method thereof. The hollow glass microballoons are characterized by comprising the following raw materials in portion by weight: 75to 80 portions of silicon dioxide, 7 to 15 portions of boron oxide, 1 to 4 portions of aluminium oxide, 0.5 to 1.5 portions of calcium oxide, 0.8 to 1.2 portions of magnesium oxide, 5 to 6 portions of sodium oxide, 0.0 to 0.3 portion of sulfur trioxide and 0 to 0.05 portion of ferric oxide. The production method of the hollow glass microballoons comprises the following steps: compounding, melting, water quenching, drying, crushing, grading, hollow balling, collection and air separation, and is characterized in that the hollow balling comprises the following steps: ejecting a glass raw material, gas and combustion-supporting gas upwards from the bottom of a balling furnace for combustion, and cooling the glass microballoons upwards by a cooling device after melting under the action of a draft fan. The hollow glass microballoons have the advantages of good surface tension, high compression strength and chemical stability. The production method can better ensure material balling, and hassimple process, less equipment and good effect as much as possible.

Description

Technical field: [0001] The invention relates to a novel hollow glass microsphere and a production method thereof. Background technique: [0002] Hollow glass microspheres are hollow and tiny spherical materials containing inert gas. Due to their unique hollow structure, physical and mechanical properties and stable chemical properties, they are non-toxic, colorless and tasteless as additives for non-metallic materials, and have been widely used. . Hollow glass microspheres are mainly used in: 1. Paints and coatings 2. Engineering plastic products 3. Fiberglass products 4. Modified rubber 5. Building materials 6. Packaging materials 7. Aerospace and space development, military industry 8. Petroleum industry. At present, there are two main products on the market. One is the hollow microspheres produced during the combustion of coal powder. The appearance is gray. The chemical composition is mainly silica and alumina. The composition fluctuates greatly and the compressive str...

AI Technical Summary

Problems solved by technology

Especially the broken glass method to produce hollow microspheres, the disadvantages of foreign patents in this area, especially the United States, are relatively high cost, low strength and poor adjustability.

[0003] In CN1396130A, a continuous manufacturing device for glass beads is introduced, which includes a bead firing furnace, a bead collector and a waste gas processor, and the bead forming furnace is connected into a complete furnace body by upper, middle and lower sections; the furnace body The upper section is in the shape of a square platform, with an exhaust gas outlet connected to the exhaust gas processor on the top, and one or more jet burners on the side; the middle section of the furnace body is cylindrical, and the lower part is equipped with a damper baffle; the lower section of the furnace body is Round funnel-shaped, with a microbead collector at the bottom; the burner sprays flames from top to bottom to the bead forming furnace, and the raw material particles enter the flame from the direction perpendicular to the burner flame for roasting. Due to the influence of the air flow, the raw material powder The body cannot be in full contact with the flame, the beading rate is low, and the production cost is high. In addition, the movement of the molten glass beads cannot be limited, and it is easy to collide with the high-temperature furnace wall or other devices and stick to the wall. It is difficult to produce particles due to gravity settling collection. Small and low density hollow glass microspheres