Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for utilizing industrial waste silica fume to prepare industrial silicon and production system

A technology of industrial waste and micro-silica fume, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of low comprehensive utilization of micro-silica fume and environmental pollution, shorten smelting time, reduce pollution, enhance highly valued effect

Active Publication Date: 2016-12-14
刘成成
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and production system for preparing industrial silicon by using industrial waste micro-silicon powder. The preparation process of the present invention is simple, safe and efficient, and the raw materials used can be used in addition to reducing agents. It is all waste micro-silica fume, and the reduction rate of micro-silica fume is greater than 85%, which effectively solves the problems of low comprehensive utilization of micro-silica fume and environmental pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for utilizing industrial waste silica fume to prepare industrial silicon and production system
  • Method for utilizing industrial waste silica fume to prepare industrial silicon and production system
  • Method for utilizing industrial waste silica fume to prepare industrial silicon and production system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the present invention provides a method for preparing industrial silicon by using industrial waste micro-silica powder. The raw materials used include 90 kg of micro-silica powder; 36 kg of petroleum coke with an iron content of less than 0.15%; and 9 kg of water.

[0040] The specific steps are:

[0041] In the production system of the present invention, the microsilica powder of the above weight portion is encrypted by a pneumatic encryption machine to 700kg / m 3 The density is sent into the microsilica powder storage encryption bin 1, and the microsilica powder metering and feeding valve 3 at the bottom of the microsilica powder storage encryption bin 1 automatically controls the feeding, and the obtained microsilica powder passes through the microsilica powder conveyor 6 It is transported to the Shuanglong mixing machine 8. At the same time, the reducing agent metering valve 4 at the lower part of the reducing agent storage bin 2 is opened...

Embodiment 2

[0043] Such as figure 1 As shown, the present invention provides a method for preparing industrial silicon by using industrial waste microsilica powder. The raw materials used include 100 kg of microsilica powder; 40 parts of coke powder with an iron content less than 0.15%; 10 parts of water.

[0044] The specific steps are:

[0045] In the production system of the present invention, the micro-silicon powder of the above weight portion is encrypted by a pneumatic fluidized bed encryption machine, and is encrypted to 750kg / m 3 The density is sent into the microsilica powder storage encryption bin 1, and the microsilica powder metering and feeding valve 3 at the bottom of the microsilica powder storage encryption bin 1 automatically controls the feeding, and the obtained microsilica powder passes through the microsilica powder conveyor 6 It is transported to the Shuanglong mixing machine 8. At the same time, the reducing agent metering valve 4 at the lower part of the reducing...

Embodiment 3

[0047] Such as figure 1 As shown, the present invention provides a method for preparing industrial silicon by using industrial waste microsilica powder. The raw materials used include 110 parts of microsilica fume; 55 parts of raw coal with an iron content less than 0.15%; 11 parts of water.

[0048] The specific steps are:

[0049] In the production system of the present invention, the microsilica powder of the above weight portion is encrypted by a pneumatic encryption machine to 800kg / m 3 The density is sent into the microsilica powder storage encryption bin 1, and the microsilica powder metering and feeding valve 3 at the bottom of the microsilica powder storage encryption bin 1 automatically controls the feeding, and the obtained microsilica powder passes through the microsilica powder conveyor 6 It is transported to the Shuanglong mixing machine 8. At the same time, the reducing agent metering valve 4 at the lower part of the reducing agent storage bin 2 is opened. Afte...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for utilizing industrial waste silica fume to prepare industrial silicon. The method includes the following steps that S1, encryption treatment is conducted on industrial waste silica fume, then the industrial waste silica fume is mixed, blended and stirred with a reducing agent to obtain a mixed material; S2, water is added to the mixed material, stirring is performed, pelletizing treatment is performed after stirring to obtain silica fume pellets; S3, the silica fume pellets are subjected to reduction smelting at the temperature of 1600-2000 DEG C for 19-21 minutes, and industrial silicon can be obtained. The invention further comprises a production system for utilizing waste silica fume to prepare industrial silicon. The system comprises a silica fume storage and encryption bin, a reducing agent storage bin, a double-auger stirring and mixing machine, an opposite-roller compression and pelletizing machine and a reducing smelting furnace. The reduced and smelt main raw materials can be wholly waste silica fume, the recovery rate of the silica fume is above 85%, the problems of low comprehensive utilization degree of silica fume and environmental pollution are solved, and higher-purity industrial silicon products are also produced.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy production, and specifically relates to a method and a production system for producing high-quality industrial silicon from dust waste recovered by an environmental protection dust collector. Background technique [0002] At present, the method of producing industrial silicon in our country is mainly to use river mine or mountain mine silica as raw material, add reducing agent and use submerged arc furnace for high temperature smelting production. Silica in mountain mines or river mines contains many impurities that are not conducive to reduction production. If they are not treated, the quality of the finished product will be reduced. In order to improve product quality, most of them need to be removed by oxygen supply during the smelting process. At the same time, industrial silicon will produce a large amount of waste associated with micro-silica fume during the production process....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/025
CPCC01B33/025C01P2006/80
Inventor 刘成成刘永康
Owner 刘成成
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com