Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for separating and recycling carbon slag and electrolyte in waste anode slag of electrolytic aluminum

A technology of separation and recovery, electrolyte, applied in solid separation, flotation, etc., to achieve the effect of simple operation, simple process and high grade

Active Publication Date: 2018-10-16
SHANXI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still considerable room for further development of these technologies, such as the separation and recovery of valuable components carbon powder and electrolyte to obtain high-purity carbon powder and electrolyte

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
  • A method for separating and recycling carbon slag and electrolyte in waste anode slag of electrolytic aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for separating and recovering carbon slag and electrolyte in waste electrolytic aluminum anode slag, using a ball mill to pulverize electrolytic aluminum waste anode slag into anode slag powder, using a 45-mesh screen to sieve the anode slag powder, and the mass percentage of the sieved material is 75% , the carbon content is 35%, the anode slag powder is dried and put into the calcination bin for 30 minutes at 950°C, the carbon powder and electrolyte in the waste anode slag are separated, the molten electrolyte sinks to the bottom, and the carbon powder floats due to its light density Above the molten liquid electrolyte, through the discharge port at the lower part of the calcination chamber, the molten electrolyte is flowed into the collection box, and the liquid level is controlled to avoid mixing of carbon powder. After cooling, the carbon powder is collected, and the collected carbon powder is still Mix part of the electrolyte, return to the ball milling pr...

Embodiment 2

[0020] A method for separating and recovering carbon slag and electrolyte in waste electrolytic aluminum anode slag, using a ball mill to pulverize electrolytic aluminum waste anode slag into anode slag powder, using 70% of the -45 mesh material, separating the carbon powder through flotation, and obtaining the liquid The slurry is filtered and dried to obtain a crude electrolyte, which contains a certain amount of carbon powder. The crude electrolyte is put into the calcination bin and calcined at 950°C for 30 minutes. The carbon powder and electrolyte in the waste anode slag are separated, and the molten electrolyte sinks to the bottom. Due to its light density, the carbon powder floats on the molten liquid electrolyte. Through the discharge port at the lower part of the calcination chamber, the molten electrolyte is flowed into the collection box, and the liquid level is controlled to prevent the carbon powder from being mixed in. After cooling, the carbon powder is collected...

Embodiment 3

[0023] A method for separating and recovering carbon slag and electrolyte in waste electrolytic aluminum anode slag. The waste electrolytic aluminum anode slag is ground by a ball mill to 65% of the -45 mesh material, and is directly put into a calcination bin without flotation process and calcined at 1000°C for 20 Minutes, the carbon powder and electrolyte in the waste anode slag are separated, the molten electrolyte sinks to the bottom, the carbon powder floats on the molten liquid electrolyte due to its light density, and the molten electrolyte is flowed into the In the collecting box, the liquid level is controlled to avoid mixing of carbon powder, and the carbon powder is collected after cooling. The collected carbon powder is still mixed with part of the electrolyte. Return to the ball milling process and repeat the above steps many times to realize the separation and recovery of carbon powder and electrolyte in the waste anode slag. The obtained carbon powder has a fixed...

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 relates to a method for separating and recovering carbon residues and electrolytes from electrolytic aluminium waste anode slag. The electrolytic aluminium waste anode slag is ball-milled and crushed and is subjected to high-temperature treatment, so that electrolyte components are melted into the liquid state; the liquid electrolytes are located at the most part of the lower layer, carbon powder floats on the upper layer, the liquid electrolytes flow into a collection box via a discharging port in the bottom of a material bin, the liquid level is controlled to prevent the carbon powder from flowing into the collection box along with the liquid electrolytes, and the two components are separated. The method is simple in technology, simple to operate and low in cost, the recovered electrolytes have the high grade, the electrolytic aluminum industry can be reutilized, and the obtained carbon powder can be used as fuel.

Description

technical field [0001] The invention belongs to the technical field of electrolytic waste recycling, and in particular relates to a method for separating and recycling carbon slag and electrolyte in waste anode slag of electrolytic aluminum. Background technique [0002] my country's electrolytic aluminum industry produces a large amount of waste anode slag every year. According to incomplete statistics, 250,000 tons of solid waste will be generated every year, and about 2 million tons of solid waste have been piled up over the years. The vast majority of these solid wastes are spent anode slag, which is produced in the process of electrolytic aluminum and the anode carbon reacts and peels off, falling into the electrolyte and mixing a large amount of electrolyte. Its composition is mainly carbon powder and electrolyte. Since they cannot be separated and recovered effectively, they can only be piled up or buried in the soil in large quantities. The electrolyte contains flu...

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 Patents(China)
IPC IPC(8): C25C3/18B03D1/018
CPCB03D1/018C25C3/18
Inventor 张金才李美萍程芳琴
Owner SHANXI UNIV