Method and device for continuously producing high-purity fused quartz material at low cost

Abstract

The invention provides a method and a device for continuously producing a high-purity fused quartz material at low cost. The method comprises the following steps: firstly, carrying out preheating and high-temperature chlorination on quartz sand of which the SiO2 content is greater than or equal to 99.5%, the moisture is smaller than 0.5%, and the grain size is 20-200 meshes to obtain high-purity quartz sand of which the SiO2 content is greater than or equal to 99.95%; then putting the hot high-purity quartz sand into a quartz glass continuous furnace to melt fused quartz; opening a discharge valve at the furnace bottom after the high-purity quartz sand is completely fused into a liquid state and clarified; simultaneously starting a cutting device at a discharge hole to cut the liquid fused quartz; feeding the cut ball-billet into a chute; forming a smooth and round fused quartz ball material by a ball separator; feeding to a finished product bin, and fluidizing and cooling to prepare the product fused quartz ball material. The method and device disclosed by the invention are scientific and reasonable in design, energy-saving and environment-friendly; the ratio of first-grade products can be over 90%; the method and the device can be applied to large-scale industrial production; development of a high-purity fused quartz industry in China is facilitated; the method and the device have great economic benefits and social benefits to enterprises and countries.

Description

technical field [0001] The invention belongs to the field of deep processing and manufacturing of non-metallic ores, in particular to a method and device for continuously producing high-purity fused silica materials at low cost. Background technique [0002] Fused silica is essentially a quartz glassy substance or a quartz glass body. Its main chemical composition is SiO 2 , it has the characteristics of high service temperature, high stability and low thermal expansion coefficient, and has a wide range of applications in industry. The current production process of fused silica block in my country is: put high-purity (SiO 2 content ≥ 99.5%), the vein quartz ore is selected, washed, and crushed to particles with a diameter of 3-8mm, then purified by pickling, washed with water, and dried, and then loaded into a fused quartz furnace (using graphite rods or carbon rods As a heating element), turn on the power supply and melt the quartz particles at 1800-2300°C. During the me...

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Problems solved by technology

[0015] The purpose of the present invention is to solve the problems of backward production process of fused silica, long melting period, high production cost, high labor intensity of workers, impurity pollution easily occurring in production and failure to produce high-quality fused silica, etc., to provide a low-cost , Method and device for continuous production of high-purity fused silica material

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