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Novel optimized prebaked anode recipe for aluminum electrolysis

A technology of prebaked anodes and aluminum electrolysis, which is applied in the field of improving the production stability of prebaked anodes for aluminum electrolysis, and can solve problems such as electrolyte carbon content, accelerated consumption of prebaked anodes, and weakened electrochemical action, so as to reduce internal defects , Excellent carbon consumption index, small process changes

Active Publication Date: 2018-06-29
INNER MONGOLIA HUOMEI TONGSHUN CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the stability of the prebaked anode is poor, the consumption of the prebaked anode will be accelerated, and more seriously, the slag and blocks will be oxidized, which will cause the electrolyte to contain carbon, thereby deteriorating the performance of the electrolyte, weakening the electrochemical action, and greatly destroying the electrolytic process. The technical conditions for normal production of aluminum seriously endanger the normal production of aluminum electrolysis, and even lead to accidental shutdown

Method used

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  • Novel optimized prebaked anode recipe for aluminum electrolysis
  • Novel optimized prebaked anode recipe for aluminum electrolysis
  • Novel optimized prebaked anode recipe for aluminum electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1 A kind of novel optimized aluminum electrolysis prebaked anode formula

[0090] The total weight of the paste is 4000kg, of which:

[0091] Coal tar pitch 628kg;

[0092] Calcined petroleum coke 3372kg.

[0093] The calcined petroleum coke is a mixture of four calcined petroleum coke materials with different particle sizes, and the quality of the mixture is respectively:

[0094] 978 kg of calcined petroleum coke pellets with a particle size of 3-6 mm;

[0095] 708 kg of calcined petroleum coke pellets with a particle size of 1-3 mm;

[0096] Calcined petroleum coke powder 1315kg (the quality of the powder whose particle size is less than 0.075mm is 750kg);

[0097] 371 kg of calcined petroleum coke pellets with a particle size of less than 1 mm.

[0098] Preparation:

[0099] (1) Raw material preparation: the coal tar pitch was melted and left standing for later use, and it was used up within 72 hours; the petroleum coke was calcined, crushed, and si...

Embodiment 2

[0103] Embodiment 2 A kind of novel optimized aluminum electrolysis prebaked anode formula

[0104] The total weight of the paste is 4000kg, of which:

[0105] Coal tar pitch 588kg;

[0106] Calcined petroleum coke 3412kg.

[0107] The calcined petroleum coke is a mixture of four calcined petroleum coke materials with different particle sizes, and the quality of the mixture is respectively:

[0108] 954 kg of calcined petroleum coke pellets with a particle size of 3-6 mm;

[0109] 615 kg of calcined petroleum coke pellets with a particle size of 1-3 mm;

[0110] Calcined petroleum coke powder 1256kg (the quality of the powder with particle size less than 0.075mm is 752kg);

[0111] 587 kg of calcined petroleum coke pellets with a particle size of less than 1 mm.

[0112] Preparation:

[0113] (1) Raw material preparation: the coal tar pitch was melted and left standing for later use, and it was used up within 72 hours; the petroleum coke was calcined, crushed, and sieved...

Embodiment 3

[0117] Embodiment 3 A kind of novel optimized aluminum electrolysis prebaked anode formula

[0118] The total weight of the paste is 4000kg, of which:

[0119] Coal tar pitch 596kg;

[0120] Calcined petroleum coke 3404kg.

[0121] The calcined petroleum coke is a mixture of four calcined petroleum coke materials with different particle sizes, and the quality of the mixture is respectively:

[0122] 978 kg of calcined petroleum coke pellets with a particle size of 3-6 mm;

[0123] 619 kg of calcined petroleum coke pellets with a particle size of 1-3 mm;

[0124] Calcined petroleum coke powder 1259kg (wherein the quality of the powder with particle size less than 0.075mm is 755kg);

[0125] 548 kg of calcined petroleum coke pellets with a particle size of less than 1 mm.

[0126] Preparation:

[0127] (1) Raw material preparation: the coal tar pitch was melted and left standing for later use, and it was used up within 72 hours; the petroleum coke was calcined, crushed, and ...

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Abstract

The invention discloses a novel optimized prebaked anode recipe for aluminum electrolysis. Petroleum coke in a raw material is calcinated and broken into four types of granules different in granularity, the purity of all the calcinated petroleum coke granules is controlled, the ratio of the granules different in granularity and the ratio of coal pitch are defined, the production stability of a prebaked anode can be effectively improved, and the quality of the prebaked anode is guaranteed. The invention further provides a preparation method for the prebaked anode for aluminum electrolysis, andthe preparation method is high in operability and practicability. The prebaked anode produced by the prebaked anode optimized recipe completely meets all performance required by YS / T285-2012, and internal defects are obviously reduced. The prebaked anode produced by the prebaked anode optimized recipe has a good use effect in the aluminum electrolysis production process, all indexes reach or exceed the domestic advanced level, particularly the carbon consumption index is excellent, and the novel optimized prebaked anode recipe is small in process change and good in compatibility with the priorart and has quite good prospect.

Description

technical field [0001] The invention relates to the technical field of prebaked anodes for aluminum electrolysis, in particular to a novel and optimized formula for prebaked anodes for aluminum electrolysis, and in particular to an improved method for improving the production stability of prebaked anodes for aluminum electrolysis. Background technique [0002] The prebaked anode for aluminum electrolysis is a carbon electrode that conducts electricity and participates in electrochemical reactions during the production of electrolytic aluminum. The main chemical reactions are: [0003] 2Al 2 o 3 +3C→4Al+3CO 2 [0004] Al 2 o 3 +2C→2Al+CO 2 +CO [0005] Because of the oxidation reaction that occurs in the electrochemical reaction of the prebaked anode, it is called the anode. At the same time, this kind of anode has undergone high-temperature roasting heat treatment in the roasting furnace before being installed in the electrolytic cell. The coal tar pitch has complete...

Claims

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Application Information

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IPC IPC(8): C25C3/12
CPCC25C3/125
Inventor 刘军李相军王金明张吉李其其格佟永清崔文辉耿少会沙宣
Owner INNER MONGOLIA HUOMEI TONGSHUN CARBON
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