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Novel technique for purification recovery of tiny silica flour

A technology of micro-silica powder and process, applied in the direction of silicon compounds, inorganic chemistry, non-metallic elements, etc., to achieve the requirements of reducing the quality of cloth bags, improving the effect of dust removal, and reducing the effect of filter wind resistance

Inactive Publication Date: 2012-01-04
北京民海艳科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of low efficiency of existing micro-silicon powder purification and recovery devices, low purity of micro-silicon powder products, overall product quality and quality defects, etc. , to provide a micro-silica powder purification and recovery process, which can effectively improve the efficiency of micro-silica fume purification and recovery, improve the purity of micro-silica fume, thereby improving the overall quality and quality of products

Method used

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  • Novel technique for purification recovery of tiny silica flour
  • Novel technique for purification recovery of tiny silica flour

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Embodiment Construction

[0022] After the flue gas is cooled by the air cooler, it enters the temperature and tempering device through the pipeline. The device is equipped with a monitor and a controller inside, and the controller is also connected to the external main fan. The monitor is mainly used to monitor the temperature and concentration of flue gas. If the temperature of the flue gas is higher than the standard temperature range, the device will activate its adjacent valve to allow cold air to enter the system through the valve, and the cold air will mix with the flue gas to keep the temperature of the flue gas in a normal constant range Inside. In addition, when the soot concentration in the pipeline is too high, the controller will activate the valve connected to it to let the outside air enter the valve and mix with the flue gas with a higher concentration to reduce the concentration of the flue gas; if the soot concentration in the pipeline If the temperature is too low, the controller wi...

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Abstract

The invention relates to a technology of micro silicon power purification, which mainly includes working procedures of monitoring and controlling, purification, recovery, etc. The new technology not only can effectively monitor and adjust the temperature and the thickness of high temperature dust and gas and avoid much fluctuation from being generated for gas volume and gas components because of the difference of raw materials and furnace conditions and the different stages of a smelting technology in the smelting process to influence the subsequent treatment technology and the product quality, but can realize the separation treatment of coarse particles and the dust of a plurality of metal oxides in dust and smoke through the ways of centrifugal separation, gravitational separation and electric separation and improve the content of SiO2 in the micro silicon power. The new technology causes a bag-type dust remover to collect aerosol micro silicon power of 0.01 micrometers through the way of coagulation of charged electric and static of the dust, and the micro silicon power is easy to realize shallow filtration when passing the bag to be filtered.

Description

technical field [0001] The invention relates to a process for purifying and recovering micro-silicon powder, in particular to a process for purifying and recovering micro-silicon powder. Background technique [0002] Micro-silica fume is a large amount of highly volatile SiO produced when ferrosilicon alloys and industrial silicon with a silicon content of more than 75% are produced in a submerged electric furnace. 2 It is formed by rapid oxidation and condensation of Si gas and air. Main componentSiO2 2 The content accounts for about 90% of the total amount of smoke and dust. The smoke and dust particles are very fine, most of which are below 1 μm. They belong to inhalable particulate matter (PM10). After being absorbed by the human body, they directly enter the lungs. If the smoke and dust are discharged directly, it will cause extremely serious air pollution. But at the same time, due to the small size of silica fume particles and large specific area (about 25-30m 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/037
Inventor 张振海刘恒黄毅
Owner 北京民海艳科技有限公司
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