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

Carbonaceous reducing agent pellets for industrial silicon production and preparation method thereof

A reducing agent, industrial silicon technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problem of not finding an ideal carbonaceous reducing agent, and achieve resource utilization, excellent performance, and lower preparation costs. Effect

Pending Publication Date: 2019-10-11
KUNMING METALLURGY INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an ideal carbonaceous reducing agent that can only partially replace charcoal and completely replace charcoal has not been found so far.

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
  • Carbonaceous reducing agent pellets for industrial silicon production and preparation method thereof
  • Carbonaceous reducing agent pellets for industrial silicon production and preparation method thereof
  • Carbonaceous reducing agent pellets for industrial silicon production and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in combination with the accompanying drawings and specific embodiments.

[0028] The composition of the carbonaceous reducing agent for industrial silicon production in this embodiment includes no more than 3% by mass of charcoal, and also includes 0-48.81% by mass of washed coal powder, 26.5%-70% by mass of petroleum coke powder, 8% to 10% mass ratio of additives and 3% to 5% mass ratio of binder, with sodium hydroxide solution as the wetting medium (the concentration of sodium hydroxide solution is 4mol / L, and the mass ratio added is 6% ), mixed evenly and pressed into agglomerates to make carbonaceous reducing agent. When the particle size range of the largest particle among the components of the carbonaceous reducing agent is 3.3mm-4.75mm, the proportion of the largest particle is 60%.

[0029] Further, starch A is selected as the binder, and its composition ratio is: 0.38% protein, 0.07% fat, 13% moisture, 0.17...

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

No PUM Login to View More

Abstract

The invention provides carbonaceous reducing agent pellets for industrial silicon production and a preparation method thereof, and belongs to the technical field of metallurgy and energy. The carbonaceous reducing agent pellets comprise, by mass, not more than 3% of charcoal, 0-48.81% of cleaned coal powder, 26.5-70% of petroleum coke powder, 8-10% of additives and 3-10% of binders. A sodium hydroxide solution is used as a wetting medium, and the carbonaceous reducing agent pellets are obtained after uniform mixing, pressing and pelleting. The preparation method includes crushing and sieving components of a carbonaceous reducing agent, adding the additives and the binders for proportional and uniform mixing, adding the sodium hydroxide solution, sufficiently and uniformly mixing to form amixture, and pelleting the mixture under the formation pressure of 20-30 MPa, wherein the mass of each pellet is 70-100g. The carbonaceous reducing agent has the advantages that charcoal raw materialscan be completely replaced, and under the condition of the replacement rate of the carbonaceous reducing agent being 80%, the composite binders greatly reduce the preparation cost of the pellets.

Description

technical field [0001] The invention relates to a carbonaceous reducing agent pellet for industrial silicon production and a preparation method thereof, belonging to the technical field of metallurgy and energy. Background technique [0002] my country's industrial silicon production began in the 1960s. Up to now, my country's industrial silicon production capacity has far exceeded that of developed regions. Restrictions such as backward development and application of reducing agents such as high-quality low-ash coal and other factors have affected the competitiveness of my country's industrial silicon products with those of Russia, Norway, Brazil, Iceland and other countries. The physical and chemical properties and particle size of the carbonaceous reducing agent used in industrial silicon production have a great influence on the smelting index and quality of industrial silicon. In addition, its chemical composition, resistivity and reaction ability, particle size compositi...

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
IPC IPC(8): C01B33/025
CPCC01B33/025
Inventor 杨妮谢刚田林李小英杨震林琳刘宝云彭学斌
Owner KUNMING METALLURGY INST
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