Low-cost carbon anode for aluminum electrolysis, and preparation method thereof

A carbon anode, low-cost technology, applied in the field of carbon anode for electrolytic aluminum and its preparation, can solve the problems of increasing the cost of carbon prebaked anode, adverse effects of working environment, low product yield, etc. The effect of lacking, increasing the density and compressive strength of carbon anode, and ensuring the final quality

Inactive Publication Date: 2014-01-01
HENAN UNIV OF SCI & TECH
View PDF5 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the rapid development of the national economy, the consumption of carbon products has been rising year after year, so that the cost of carbon prebaked anodes with petroleum coke as raw materials has been greatly increased. During the production of carbon anodes, coal tar pitch releases SO2 at high temperatures , CO2 and other harmful substances have a negative impact on the working environment. The more gas

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] A method for preparing a low-cost carbon anode for electrolytic aluminum, comprising the following steps:

[0048] Step 1, preparation of raw materials

[0049] a. Carbonization of rice husk

[0050] Put the rice husk into the carbonization furnace and raise the temperature to 700°C for heating and carbonization. During the heating process: 25~80°C, the heating rate is 1.3°C / min; 80°C-200°C, the heating rate is 0.5°C / min; 200°C- 700°C, with a heating rate of 4.5°C / min; heat up to 700°C and keep warm for 1 hour, then cool naturally to room temperature to obtain carbonized rice husks for later use;

[0051] b. Anthracite calcination

[0052] Put the anthracite into the calciner and calcinate it under the condition of 1750~2000℃ to volatilize the ash in the anthracite for later use;

[0053] c. Broken and abrasive

[0054] The carbonized rice husks prepared in step a are crushed and ground successively on a crusher and an abrasive mill, so that the particle size of the...

Embodiment 1

[0073] A low-cost carbon anode for electrolytic aluminum, its raw material is composed of binder and aggregate, the weight percentage of the binder and the total weight of the carbon anode raw material is 15%, and the aggregate accounts for carbon The weight percentage of the total weight of the anode raw material is 85%; the binder is composed of modified phenolic resin and modified pitch, the modified phenolic resin accounts for 70% by weight of the binder, and the modified pitch accounts for 70% by weight of the binder 30%; the aggregate is composed of the following components by weight percentage: 50% carbonized rice husk with a particle size of 2-6 mm after acid-base ash removal, 20% anthracite coal with a particle size of 0-1 mm, 16% 14% of petroleum coke with a particle size of 2-6mm and 14% of artificial graphite with a particle size of 0-1mm. Among them, the ash content of carbonized rice husk and anthracite coal after acid-base deashing are both lower than 1%; the ash...

Embodiment 2

[0102] A low-cost carbon anode for electrolytic aluminum, its raw material is composed of binder and aggregate, the weight percentage of the binder and the total weight of the carbon anode raw material is 20%, and the aggregate accounts for carbon The weight percent of the total weight of the anode raw material is 80%; the binder is composed of modified phenolic resin and modified asphalt, and the weight percent of modified phenolic resin in the binder is 60%, and the weight percent of modified asphalt in the binder is 40%; the aggregate is composed of the following components by weight percentage: 60% carbonized rice husk with a particle size of 2-6mm after acid-base ash removal, 16% anthracite coal with a particle size of 0-1mm, 12% Petroleum coke with a particle size of 2-6mm and 12% of artificial graphite with a particle size of 0-1mm. Among them, the ash content of carbonized rice husk and anthracite after acid-base deashing are both lower than 1%; the ash content of artif...

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
Granularityaaaaaaaaaa
Granularityaaaaaaaaaa
True densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a low-cost carbon anode for aluminum electrolysis, and a preparation method thereof. Raw materials of the carbon anode comprise 80-85wt% of aggregate and 15-20wt% of a binder, the aggregate comprises 50-60wt% of carbonized rice husk having a granularity of 2-6mm and subjected to acid and alkali ash removal, 15-20wt% of anthracite having a granularity of 0-1mm, 12-16wt% of petroleum coke and 12-16wt% of artificial graphite having a granularity of 0-1mm, and the binder comprises 60-70wt% of a modified phenolic resin and 30-40wt% of modified asphalt. The preparation method comprises the following steps: preprocessing the aggregate, mixing with the binder, carrying out compression molding, roasting and cooling to prepare the carbon anode. The preparation method, which uses the carbonized rice husk and the anthracite to substitute the petroleum coke as a main aggregate, can mitigate Chinese petroleum import pressure and alleviate the petroleum scarcity crisis caused by the rapid industrial development to realize the effective utilization of byproducts of agricultural products and the reduction of the aluminum electrolysis cost.

Description

technical field [0001] The invention relates to a carbon anode for electrolytic aluminum and a preparation method thereof, in particular to a carbon anode for electrolytic aluminum produced by using carbonized rice husk and anthracite coke as raw materials and a preparation method thereof. Background technique [0002] At present, the 350~400KA electrolytic cell in my country has gradually become the mainstream cell type of aluminum electrolysis. With the enlargement of the electrolytic cell, the overall technology of the aluminum electrolytic cell has approached the international level, but the current domestic carbon anode consumption is about 490kg / t aluminum, and the electrode change cycle is in 30 days or so. Prebaked anodes for electrolytic aluminum have the largest output among domestic carbon products, but their service life and conductivity are far behind the international level, resulting in huge waste of materials and energy in my country's aluminum electrolysis in...

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): C25C3/12
Inventor 王维谷万铎李海涛温铁军王运江
Owner HENAN UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap