Glass microballoon manufacturing device and preparation method thereof

Abstract

The invention discloses a glass microballoon manufacturing device comprising a furnace body (1) and a waste gas treatment device, wherein the furnace body (1) is formed by air-tight connection of an upper part and a lower part, the upper part of the furnace body is of a cubic shape, a waste gas emission port (4) is arranged at the top of the upper part, one or more injection-type burners (2) are horizontally installed on the side of the upper part, a preheating air pipe (14) is arranged in the upper part, the lower part of the furnace body is of a square conical shape, and one or more microballoon collectors (3) are arranged at the bottom of the lower part. According to the glass microballoon manufacturing device and the preparation method thereof provided by the invention, the furnace body which adopts the cubic structure enlarges the cooling space; the horizontally installed injection-type burners and the preheating air pipe arranged in the furnace body can give full play to the heat value of fuel, thus reducing energy source waste, saving energy and reducing emission; TiO2 and Al2O3 with relatively lower costs are adopted, the refractive index of the product is greater than or equal to 1.93; and the glass microballoon manufacturing device and the preparation method thereof have the advantages of reducing devitrification, improving the cooling velocity, having good product quality, improving the utilization ratio of raw material, being capable of large-scale production, and the like.

Description

technical field [0001] The invention relates to a device for manufacturing glass microspheres and a preparation method thereof. Background technique [0002] High-refractive index glass beads are an essential additive material in retroreflective materials. Retro-reflective materials use the unique optical properties of high-refractive index glass beads to reflect the light from the light source to the direction of the light source and maintain in a small pyramid. At present, most of the retroreflective materials used in China are imported from the 3M company in the United States. Only a few high-refractive index glass beads in my country are produced by the platinum crucible melting method. The technical parameters of the products are very unstable, and the equipment investment is large. High energy consumption and low firmness of finished products make it difficult to mass-produce on a large scale. [0003] CN1396130A has introduced a kind of glass bead continuous manufact...

AI Technical Summary

Problems solved by technology

At present, most of the retroreflective materials used in China are imported from the 3M company in the United States. Only a few high-refractive index glass beads in my country are produced by the platinum crucible melting method. The technical parameters of the products are very unstable, and the equipment investment is large. High energy consumption, low firmness of finished products, difficult to mass production

[0003] CN1396130A has introduced a kind of glass bead continuous manufacturing device, and it mainly comprises microbead burning furnace, bead collector and waste gas processor, and its microbead burning furnace is divided into upper, middle and lower three sections, and the burner spout is positioned at the upper end and Adopt the way of tilting downward at a large angle. After entering the furnace chamber, the microbead precursor powder accelerates the falling speed of the microbeads under the double action of the flame and its own gravity, improves the cooling rate, and avoids crystallization. But it is not conducive to large-scale production. In the case of too much feed, a lot of raw materials will be taken away by the airflow before the thermal reaction occurs. There will be more raw materials in the follow-up process, more raw materials in the finished product, and the qualified rate of the finished product. Inferior disadvantages

[0004] CN86107294A has introduced a kind of glass bead manufacturing device, and it mainly comprises powder material container, burner, bead collector, isolation cylinder, waste gas treatment system, wherein the exhaust port on the isolation cylinder is located at the bottom of the burner, located at On the lower side wall of the furnace body, an adjustable air inlet is provided above the isolation cylinder to adjust the airflow and temperature in the cylinder. Therefore, the airflow direction in the cylinder is from top to bottom, resulting in more raw materials in the cylinder. Before the thermal reaction occurs, it enters the bead collector, which greatly reduces the quality of the product. The furnace does not have any cooling equipment, and it is easy to form scars on the inner wall of the furnace, which has the disadvantages of poor product quality and low production efficiency.

[0005] At present, most domestic manufacturers use platinum crucible production method to produce high refractive index glass raw materials. For every 50Kg of glass frit produced, about 8-10Kg of platinum crucibles are needed to be heated for several hours under molybdenum electrodes of several kilowatts. The loss of platinum per ton of glass frit produced is as high as 8-10%. The production cost is quite expensive and the output is low, which cannot meet the current market demand. When glass beads with a refractive index of 1.93 are required, it is often used to add glass beads to the glass composition. A large number of oxide components with a refractive index exceeding 1.93, often added raw materials include PbO, Bi 2 o 3 , TeO 2 and rare earth oxides while reducing SiO 2 、K 2 O, Na 2 O and other low refractive index oxide content, in industrial production, Pb 2+ Toxic, does not meet environmental protection requirements, Bi 2 o 3 , TeO 2 And rare earth oxides are expensive, not suitable as glass raw materials, and the range of forming glass is extremely narrow, not suitable for industrial production

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