Graphite paste spray material of anode steel claw and spraying method of graphite paste sprayer

A technology of anode steel claw and graphite paste, which is applied in the direction of coating, device for coating liquid on the surface, etc., can solve the problems of increasing the resistance of phosphorus pig iron, reducing the strength of phosphorus pig iron, and weak adhesion, and improving phosphorus pig iron. Strength, reduced graphite usage, and uniform coverage

Inactive Publication Date: 2013-05-08
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The adhesion of graphite on the steel claw head of this process is not strong, so when the steel claw is washed by the phosphorus pig iron water during assembly and casting, a part of the graphite will be detached from the anode steel claw head and float on the surface of the phosphorus pig iron water , even solidification in the middle of phosphorus pig iron water increases the resistance of phosphorus pig iron and reduces the strength of phosphorus pig iron
Even if the formulator takes this problem into consideration and increases the proportion of graphite in graphite paste to 25% to 40% to meet production needs, about 20% of the graphite is also wasted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The graphite paste spraying material of an anode steel claw contains graphite and kerosene, and the graphite accounts for 5-24% of the mass of the spraying material.

[0027] Graphite in the prior art accounts for 25-40% of the mass of the graphite paste, because the graphite paste is brushed or dipped onto the surface of the steel claw, and the fit is not tight and easy to fall off, wasting a lot of raw materials; in fact, the graphite paste remains on the surface of the steel claw Only 5-20% of graphite plays the role of actual protection and lubrication.

[0028] And the embodiment of the present invention can adopt compressed air and spraying tool to spray after graphite paste is sprayed, and spraying efficiency is high and easy to dry, and graphite fast and steel claw surface is closely attached, and raw material utilization rate is high, therefore, the graphite content in the raw material of spraying thing that adopts can be as little as 5-24%.

[0029] Preferabl...

Embodiment 2

[0041] A. Using 0.3 MPa compressed air as a carrier, spray kerosene onto the surface of the anode steel claw through a spray gun.

[0042] B. Using 0.3 MPa compressed air as a carrier, spray graphite onto the surface of the anode steel claw through a spray gun, and the interval between steps A and B is 10s. The mass ratio of graphite to kerosene is 1:9, that is, graphite accounts for 10% of the mass of the sprayed substance. Spraying speed is 1.2cm 3 / S, the thickness of single spraying is 0.3mm.

[0043] After standing still for 5 minutes, place the steel claw in the anode carbon bowl, and then pour phosphorus pig iron water in the gap. During the casting process, no graphite shedding was found. After casting the phosphorus pig iron solution once, the steel claws are fixed; the anode does not loosen the phosphorus pig iron ring during the service life of the aluminum electrolytic cell, and the iron-carbon pressure drop decreases by 7mv.

[0044] During the standing proces...

Embodiment 3

[0046] A. Using 0.3 MPa compressed air as a carrier, spray kerosene onto the surface of the anode steel claw through a spray gun.

[0047] B. Using 0.4 MPa compressed air as a carrier, spray graphite onto the surface of the anode steel claw through a spray gun, and the interval between steps A and B is 8s. The mass ratio of graphite to kerosene is 1:19, that is, graphite accounts for 5% of the mass of the sprayed substance. Spraying speed is 2cm 3 / S, the thickness of single spraying is 0.25mm.

[0048] After standing for 10 minutes, place the steel claw in the anode carbon bowl, and then pour phosphorus pig iron water into the gap. During the casting process, no graphite shedding was found. After casting a phosphorus pig iron solution, the steel claws are fixed; the anode has no loosening of the phosphorus pig iron ring during the service life of the aluminum electrolytic cell, and the iron-carbon pressure drop is reduced by 9mv.

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Abstract

The invention discloses a graphite paste spray material of an anode steel claw and a spraying method of the graphite paste spray material. The graphite paste spray material comprises, by mass, 5-24% of graphite and the balance kerosene. The spraying method includes: utilizing compressed air at 0.3-0.6 megapascal as a carrier to spray the kerosene on the surface of the anode steel claw via a spraying tool; and after 5-10 seconds, utilizing the compressed air at 0.3-0.6 megapascal as a carrier to spray graphite powder on the surface of the anode steel claw via the spraying tool. In the graphite paste spray material in the embodiment, graphite content is greatly reduced, cost is saved, particles are diminished, the graphite paste spray material are easy to attach on the surface of the anode steel claw, and stability is enhanced.

Description

technical field [0001] The invention relates to the technical field of prebaked anode assembly for an aluminum electrolytic cell, in particular to a graphite paste spray coating of an anode steel claw and a spray coating method thereof. Background technique [0002] When assembling carbon prebaked anodes in the aluminum electrolysis industry, in order to prevent the phosphorus pig iron from hitting the steel claws and iron rings and sticking to the steel claws during casting, generally the anode steel claws are coated with graphite powder first, and then the phosphorus pig iron is cast. The specific process is: A. Graphite powder is put into kerosene or diesel oil to make a paste, and the proportion of graphite in the graphite paste is generally 25% to 40%; B. Brush on the steel claw head with a brush, or directly brush the steel claw head Dip it in the graphite paste; C. Dry the graphite layer with natural gas or electric heating. There are following problems in this techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/36B05D1/02B05D1/12B05D7/14C25C3/12
Inventor 熊自强
Owner SNTO TECH GRP
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