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Petroleum coke breeze agglomerate material and its preparation method

A technology of petroleum coke powder and coke powder coke, which is applied in the field of petroleum coke materials and its preparation, petroleum coke powder coke agglomeration molding preparation technology, can solve the problems of high content of petroleum coke powder coke, affecting the density of prebaked anodes, etc., to achieve The effect of high conductance

Inactive Publication Date: 2012-06-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the high content of petroleum coke powder coke in the aluminum industry affects the density of prebaked anodes, the present invention provides a petroleum coke powder coke agglomeration material and a preparation method thereof, so as to finally obtain a prebaked anode with high density and high conductivity , to achieve the purpose of energy saving, emission reduction and consumption reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Sieve petroleum coke powder and divide it into two particle sizes of 3-6mm and less than 3mm; then 3-6mm petroleum coke powder: petroleum coke powder less than 3mm=0:1 mass ratio mixing;

[0035] (2) Heat the coal tar pitch binder at 80°C for 20 minutes to make it in a molten state;

[0036] (3) Mix the binder obtained in step (2) with the petroleum coke powder coke obtained in step (1) according to the following mass percentages:

[0037] Petroleum coke powder coke 94%

[0038] Binder 6%;

[0039] (4) Press molding at a temperature of 50°C and a pressure of 62MPa, and keep the pressure for 20s. After drying, the petroleum coke powder coke agglomeration material is obtained, and its bulk density is 1.17g / cm 3 , The throwing strength is 72.87%.

Embodiment 2

[0041] (1) Sieve the petroleum coke powder and divide it into two particle sizes of 3-6mm and less than 3mm; then 3-6mm petroleum coke powder: petroleum coke powder less than 3mm=2:8 mass ratio mixing;

[0042] (2) Add water to the emulsified asphalt binder to dissolve, and make a liquid binder solution with a mass concentration of 20%;

[0043] (3) Mix the binder obtained in step (2) with the petroleum coke powder coke obtained in step (1) according to the following mass percentages:

[0044] Petroleum coke powder coke 92%

[0045] Binder 8%;

[0046] (4) Press molding at a temperature of 160°C and a pressure of 126MPa, and keep the pressure for 40s. After drying, the coke agglomeration material of petroleum coke powder is obtained, and its bulk density is 1.20g / cm 3 , The throwing strength is 73.14%.

Embodiment 3

[0048] (1) Sieve the petroleum coke powder and divide it into two particle sizes of 3-6mm and less than 3mm; then 3-6mm petroleum coke powder: less than 3mm petroleum coke powder = 3:7 mass ratio mixing;

[0049] (2) Add water to dissolve the sodium humate binder to make a liquid binder solution with a mass concentration of 26%;

[0050] (3) Mix the binder obtained in step (2) with the petroleum coke powder coke obtained in step (1) according to the following mass percentages:

[0051] Petroleum coke powder coke 90%

[0052] Binder 10%;

[0053] (4) Press molding at a temperature of 25°C and a pressure of 188MPa, and keep the pressure for 60s. After drying, the coke agglomeration material of petroleum coke powder is obtained, and its bulk density is 1.22g / cm 3 , The throwing strength is 84.83%.

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Abstract

The invention provides a petroleum coke breeze agglomerate material and its preparation method. The method consists of: sieving petroleum coke breeze, then mixing it with a binder, and conducting breeze moulding, thus obtaining the petroleum coke breeze agglomerate material composed of, by mass percent: 88-94% of petroleum coke breeze and 6-12% of the binder. The moulded breeze obtained by the method of the invention has good volume density and dropping strength, so that the breeze can be fully calcined during petroleum coke calcination, harmful impurities as well as volatile matters can be eliminated timely, and a breeze agglomerate with large granularity, high density and good conductance can be obtained. And finally, a prebaked anode with high density and high conductance can be obtained so as to reach the purposes of energy saving, emission reduction and consumption lowering, thus being able to bring enormous benefits to electrolytic aluminum enterprises.

Description

technical field [0001] The invention relates to a petroleum coke material and a preparation method thereof, in particular to a preparation method for coke agglomeration of petroleum coke powder in the production process of a carbon anode for aluminum, and belongs to the technical field of engineering materials. Background technique [0002] At present, the content of powder coke in petroleum coke, the raw material for aluminum carbon in China, is increasing, which has brought adverse effects on the production and quality performance of carbon anodes for aluminum, and seriously increased the excessive consumption of carbon and the energy consumption of electrolytic aluminum. The powder coke can only be deposited on the surface of the material and cannot be deposited to the bottom of the material. The calcination is insufficient, and the impurities and volatile components of the powder coke cannot be fully removed in time, so that the electrical properties and density of the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/00C01B32/00C01B32/05
Inventor 严继康贾瑞娇袁君甘国友邱哲生周永全周林杜景红张家敏易健宏
Owner KUNMING UNIV OF SCI & TECH
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