Technology and apparatus of taking quartz as raw material to prepare fumed silica at low temperature

A technology of fumed white carbon black and low temperature, which is applied in the direction of hydrogen chloride preparation, silicon dioxide, hydrogen fluoride, etc., to achieve cost saving, low cost, and large-scale industrial production

Active Publication Date: 2016-12-14
田辉明
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Problems solved by technology

After consulting relevant information and Chinese patent documents, no relevant reports were found on the use of other raw materials to produce fumed silica

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  • Technology and apparatus of taking quartz as raw material to prepare fumed silica at low temperature
  • Technology and apparatus of taking quartz as raw material to prepare fumed silica at low temperature
  • Technology and apparatus of taking quartz as raw material to prepare fumed silica at low temperature

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0029] The structure of the preparation device provided in this example is as follows: figure 1 As shown, the device includes a hot air feeding system, a chemical reaction system, a cooling system and an exhaust gas absorption system, wherein the hot air feeding system is used to store compressed air and send it into the chemical reaction system after heating the air. The hot air feeding system comprises an air compressor 12, an air storage tank 13, an air heater 14 and pipelines, the air compressor 12, the air storage tank 13 and the air heater 14 are connected by pipelines, and the pipelines are also provided with valves and meter.

[0030] The chemical reaction system is composed of an acid liquid storage tank 1, a feed bin 2 and a reactor 3, th...

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Abstract

The invention provides a technology and apparatus of taking quartz as the raw material to prepare fumed silica at a low temperature. In the technology, wastes such as quartz tailing or micropowder are taken as the raw material; then quartz tailing or micropowder is reacted with a fluorine-containing acid liquid, hydrochloric acid, and nitric acid to prepare fumed silica with a high added value, the SiO2 content of prepared product is more than 99.9%; the specific surface area measured by a multi-point BET method is 350 to 500 m<2>/g; the wastes are converted into valuable resources; the generated acidic gas in the preparation technology is absorbed by a negative pressure water absorption tank, a corresponding acid liquid can be obtained, and the acid liquid can be reused after the concentration of concentrated acid liquid reaches a certain level. The invention also provides a production apparatus of the technology. The production apparatus are made of common devices in chemical factories, the cost is low, and the industrial massive production can be realized.

Description

technical field [0001] The invention relates to a process method and a device for producing gas-phase white carbon black at low temperature by using quartz sand and quartz tailings (micropowder), belonging to the technical fields of chemical purification and environmental protection. Background technique [0002] Quartz tailings are wastes in the production and processing of quartz sand. At present, the tailings produced in the process of quartz sand production and processing in my country are tens of millions of tons per year. How to effectively solve the problem of secondary utilization of quartz tailings resources, some quartz sand production enterprises have begun to use quartz tailings to produce aerated bricks and walls. body material; some companies also sell it to cement factories and ceramic factories as silicon raw materials; some companies grind it into 325 mesh powder as low-grade silicon micropowder raw material; none of the above methods can make the quartz tail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C01B7/19C01B7/01C01B21/40
CPCC01B7/012C01B7/193C01B21/40C01B33/18C01P2006/12C01P2006/80
Inventor 田辉明江军民
Owner 田辉明
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