Afterheat recovery method and special appts for silcon ore furnace fume purification and nano si02 micro powder

A technology for flue gas purification and waste heat recovery, applied in lighting and heating equipment, chemical instruments and methods, separation methods, etc., can solve the problem of large equipment structure, waste heat of flue gas not being recycled, increasing dust removal fan power and operating costs and other issues to achieve good results

Inactive Publication Date: 2005-01-12
金科
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Problems solved by technology

However, the silicon content of silicon products will decrease, making it difficult to improve the grade of silicon products
At the same time, the power and operating costs of the dust removal fan are also increased, and the waste heat of the flue gas has not been recycled.
The air cooler is used, which occupies a large area and has a huge equipment structure, which wastes the waste heat resources of the flue gas, and the investment cost is equivalent to that of the waste heat boiler.
Therefore, the traditional dust removal technology is difficult to fully meet the dust control requirements of silicon submerged arc furnaces. It is necessary to modify the traditional dust removal equipment to develop flue gas purification and nano-SiO 2 Micropowder - equipment for waste heat recovery

Method used

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  • Afterheat recovery method and special appts for silcon ore furnace fume purification and nano si02 micro powder
  • Afterheat recovery method and special appts for silcon ore furnace fume purification and nano si02 micro powder

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0022] figure 1 Among them, the dust generation mechanism of silicon submerged arc furnace 1: the production of industrial silicon, ferrosilicon, silicon manganese, silicon calcium is in the high temperature reducing atmosphere of submerged arc furnace, high-purity SiO 2 It is prepared by reacting CaO with coke. in SiO 2 During the reduction reaction with CaO, a large amount of SiO and CO gas escape from the material surface, and gaseous SiO and O in the air 2 The reaction produces free SiO 2 Micronized powder, namely:

[0023]

[0024]

[0025]

[0026]

[0027] The inventor shows through sampling test that industrial silicon submerged arc furnace SiO 2 The purity of micropowder is the highest (93%-98%), and the whiteness is about 50%; followed by ferrosilicon, silicon-calcium, and silicon-manganese submerged ar...

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Abstract

Dedicated equipment integrating multiple decentralized coarse and fine fume cleaning equipment and heat recovery boiler is composed of fume intake duct, upper cone shaped clearance chamber, straight shaped reclaiming chamber, lower cone shaped ash collection chamber and clearance delivery tube for cleansing fume from hot stove of silicon mine, reclaiming nano SiO2 powder and waste heat. Upper part of the straight shaped reclaiming chamber includes several filters made from metal rubber or mipor ceramics, and lower part is composed of several tubular type heat exchangers with forced circulation water-cooled guide plate. Fume cleaning reaches discharge standard. Reclaimed saturated steam can be utilized for production and life and grain size of reclaimed nano SiO2 powder less than 100nm is more than 60%.

Description

technical field [0001] Flue gas purification of silicon submerged arc furnace described in the present invention, nano-SiO 2 Micropowder-waste heat recovery method and its special equipment, belonging to the fume control, waste heat recovery and nano-SiO of industrial silicon, ferrosilicon, silicomanganese, silicon-calcium submerged arc furnaces 2 Technical field of preparation. technical background [0002] Existing nano-SiO 2 The preparation techniques mainly include the following methods: [0003] (1) Gas phase synthesis method [0004] Under the protection of hydrogen atmosphere, SiCl 4 SiO is produced during combustion 2 Micropowder: [0005] <chemistry num="001"> <chem file="200410029990_cml001.xml" / > < / chemistry> [0006] This method is complex in technology, high in production cost, and high in price, so it is difficult to popularize and apply. [0007] (2) Sol-Gel method [0008] Silicone raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00C01B33/113F27D17/00
CPCY02P10/25Y02P20/10Y02P20/129
Inventor 金科
Owner 金科
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