CN101985760B - Components of graphitized anode and preparation method thereof - Google Patents

Abstract

The invention belongs to a graphitized anode manufacturing process, and in particular relates to components of a graphitized anode and a preparation method thereof. The components of the graphitized anode comprise 20 to 22 weight percent of binder and 78 to 80 weight percent of calcined needle-like petroleum coke. The preparation method of the graphitized anode comprises the following steps of: crushing the calcined needle-like petroleum coke; proportioning; mixing and kneading; cooling; performing vibratory molding; baking; soaking; secondary baking; graphitizing; and machining for molding so as to form a graphitized anode block. By the preparation method, the volume density is effectively improved to ensure that the anode density is higher and the service life of the anode is prolonged; and the graphitized anode block has high electric conductivity which changes the current distribution of a metal layer and causes new magnetofluid kinetic equilibrium of an electrolytic bath, has extremely low resistivity to ensure that the cathode drop is reduced and the aims of saving energy and reducing consumption better are fulfilled, and has higher mechanical strength to ensure that the fracture sensitivity of a carbon block is reduced.

Description

Component of a kind of greying anode and preparation method thereof

[technical field]

The invention belongs to a kind of greying anode manufacturing process, especially relate to component of a kind of graphitized anode for titanium electrolytic tank and preparation method thereof.

[background technology]

Proposing technical progress according to " national industry technology policy " is the important spiritual of adjusting economic structure, the important channel of realizing Sustainable development, indicating the WeiLai Technology development strategy is: 2010, part new and high technology and international most advanced level keep synchronously, and the gordian technique of emphasis production field is reached advanced world standards substantially.

Along with the sustainable and healthy development of Chinese national economy, the application of titanium has spread to all trades and professions, and the output of titanium increases rapidly.The enterprise of domestic production metal titanium develops into present more than 10 by 2 0.9 ten thousand ton/years in 2000, and about 200,000 tons of annual capacities become the in the world big producing country of metal titanium.In the smelting process of titanium metal, the greying anode that electrolysis is used, reason owing to environment for use, the physical and chemical index of antianode requires very harsh, at present domesticly can't produce the titanium electrolysis of satisfying service requirements with full greying anode, whole dependence on import, annual a large amount of outer of cost that need remitted purchase.

[summary of the invention]

In order to overcome the deficiency in the background technology, the invention discloses component of a kind of greying anode and preparation method thereof, but component of described greying anode and preparation method thereof Effective Raise volume density make the anode compactness extent better, improve its work-ing life; And have the distribution of current that good conductivity has changed metal level, cause the new MAGNETOHYDRODYNAMIC EQUILIBRIA IN THE SOLAR of electrolyzer; Very low resistivity reduces cathode drop, has reached better energy-saving and cost-reducing purpose; Have higher physical strength and reduced charcoal piece fracture susceptibility.

For achieving the above object, the present invention adopts following technical scheme:

A kind of component of greying anode, described component raw material proportioning be by weight percentage:

Comprise binding agent 20-22%;

Forge rear acicular petroleum coke (siccative) 78-80%.

Wherein saidly forge rear acicular petroleum coke (siccative) size composition for by weight percentage;

Comprise 2-1mm20 ± 3%;

1-0mm38±3%；

-0.075mm42±3%。

The component of described greying anode, wherein binding agent is modified pitch.

A kind of preparation method of greying anode, described preparation method comprises following processing step:

1), get and forge rear acicular petroleum coke, then pulverize through disintegrating apparatus forging rear acicular petroleum coke;

2), the rear acicular petroleum coke of forging after the pulverizing sieves " by the size composition screening ";

3), batching: by its proportioning raw materials, with modified pitch, forge rear acicular petroleum coke and fully stir evenly and put into the kneading pot;

4), kneading: utilize kneading pot kneading;

A, kneading time 40-50 minute;

B, kneading temperature 170-180 ℃;

5), cool material: the modified pitch after the kneading, forge rear acicular petroleum coke mixture and use cooler to carry out cold to expect, wherein go out to stick with paste temperature 160-165 ℃;

6), vibratory compaction: with described modified pitch, forge rear acicular petroleum coke and mix to stick with paste to put into and vacuumize vibrating forming machine vibratory compaction, time of vibration 50-70 second;

7), roasting: at holding stage, temperature reaches 1100-1200 ℃, and soaking time is 20-40 hour;

8), dipping: in the high-pressure impregnation tank, add modified pitch: pressure is 1.4-1.6MPa, keeps 3-4 hour, fills nitrogen;

9), re-baking: at holding stage, temperature reaches 700-800 ℃, and soaking time is 10-20 hour;

10), greying: in inner string graphitization stove, finish electric power feeding time 30-33 hour.

11), the mechanical workout moulding forms graphitised anode block.

The preparation method of described greying anode, described cooler is for loving the vertical cooler of being permitted.

The preparation method of described greying anode, the described vibrating forming machine that vacuumizes is that KHD vacuumizes vibrating forming machine.

Because adopt aforesaid technical scheme, the present invention has following superiority:

The preparation method of greying anode of the present invention, for satisfying domestic titanium industry to the ever-increasing demand of full greying anode portion, reduce simultaneously the purchase cost of manufacturing enterprise, Supply period shortened, the finished product that obtains by processing step of the present invention has following advantage:

1) Effective Raise volume density make the anode compactness extent better, improve its work-ing life;

2) electric property: good conductivity has changed the distribution of current of metal level, causes the new MAGNETOHYDRODYNAMIC EQUILIBRIA IN THE SOLAR of electrolyzer; Very low resistivity reduces cathode drop, has reached better energy-saving and cost-reducing purpose;

3) have higher physical strength and reduced charcoal piece fracture susceptibility.

[description of drawings]

Fig. 1 is process flow sheet of the present invention.

[embodiment]

Can explain in more detail the present invention by the following examples, disclose purpose of the present invention and be intended to protect all changes and improvements in the scope of the invention that the present invention is not limited to the following examples;

A kind of component of greying anode, described component raw material proportioning be by weight percentage:

Comprise binding agent 20-22%;

Forge rear acicular petroleum coke (siccative) 78-80%.

Wherein saidly forge rear acicular petroleum coke (siccative) size composition for by weight percentage;

Comprise 2-1mm20 ± 3%;

1-0mm38±3%；

-0.075mm42±3%。

The component of described greying anode, wherein binding agent is modified pitch.

A kind of preparation method of greying anode, described preparation method comprises following processing step:

1), get and forge rear acicular petroleum coke, then pulverize through disintegrating apparatus forging rear acicular petroleum coke;

2), the rear acicular petroleum coke of forging after the pulverizing sieves " by the size composition screening ";

3), batching: by its proportioning raw materials, with modified pitch, forge rear acicular petroleum coke and fully stir evenly and put into the kneading pot;

4), kneading: utilize kneading pot kneading;

A, kneading time 40-50 minute;

B, kneading temperature 170-180 ℃;

5), cool material: the modified pitch after the kneading, forge rear acicular petroleum coke mixture and use cooler to carry out cold to expect, wherein go out to stick with paste temperature 160-165 ℃;

6), vibratory compaction: with described modified pitch, forge rear acicular petroleum coke and mix to stick with paste to put into and vacuumize vibrating forming machine vibratory compaction, time of vibration 50-70 second;

7), roasting: at holding stage, temperature reaches 1100-1200 ℃, and soaking time is 20-40 hour;

8), dipping: in the high-pressure impregnation tank, add modified pitch: pressure is 1.4-1.6MPa, keeps 3-4 hour, fills nitrogen;

9), re-baking: at holding stage, temperature reaches 700-800 ℃, and soaking time is 10-20 hour;

10), greying: in inner string graphitization stove, finish, electric power feeding time 30-33 hour, obtain the greying anode.

11), the mechanical workout moulding forms graphitised anode block.

The preparation method of described greying anode, described cooler is for loving the vertical cooler of being permitted.

The preparation method of described greying anode, the described vibrating forming machine that vacuumizes is that KHD vacuumizes vibrating forming machine.

The present invention is as follows through implementing its physical and chemical index and customer requirement and same kind of products at abroad contrast situation

Classification	Resistivity μ Ω m	Volume density g/cm3	True density g/cm3	Compressive strength Mpa	Folding strength Mpa	Ash content %	Coefficient of thermal expansion 10-6/k
								The industry requirement index	≤5	≥1.72	----	----	≥17.6	≤0.1	≤2.5
Product of the present invention	5	1.75	2.23	25	20	0.05	2.35
								Same kind of products at abroad	8	1.73	2.22	23	21	0.03	3.26

Can find out greying anode volume density 〉=1.75g/cm of the present invention by upper table ³, folding strength 〉=20MPa, resistivity≤5 μ Ω .m, effect is very obvious.

Claims (1)

1. the component of a greying anode is characterized in that: described component raw material proportioning by weight percentage:

Comprise binding agent 20-22%;

Forge rear acicular petroleum coke siccative 78-80%;

Described binding agent is modified pitch;

Describedly forge the size composition of rear acicular petroleum coke siccative for by weight percentage;

Comprise 2-1mm20 ± 3%;

1-0mm?41%；

-0.075mm?39%。

2, the preparation method of described greying anode according to claim 1, it is characterized in that: described preparation method comprises following processing step:

1), get and forge rear acicular petroleum coke, then pulverize through disintegrating apparatus forging rear acicular petroleum coke;

2), the rear acicular petroleum coke of forging after the pulverizing sieves by size composition;

3), batching: by its proportioning raw materials, with modified pitch, forge rear acicular petroleum coke and fully stir evenly and put into the kneading pot;

4), kneading: utilize kneading pot kneading;

A, kneading time 40-50 minute;

B, kneading temperature 170-180 ℃;

5), cool material: the modified pitch after the kneading, forge rear acicular petroleum coke mixture and use cooler to carry out cold material, wherein go out to stick with paste temperature 160-165 ℃, described cooler is for loving vertical perhaps cooler;

6), vibratory compaction: with described modified pitch, forge rear acicular petroleum coke and mix to stick with paste to put into and vacuumize vibrating forming machine vibratory compaction, time of vibration 50-70 second, the described vibrating forming machine that vacuumizes is that KHD vacuumizes vibrating forming machine;

7), roasting: at holding stage, temperature reaches 1100-1200 ℃, and soaking time is 20-40 hour;

8), dipping: in the high-pressure impregnation tank, add modified pitch: pressure is 1.4-1.6MPa, keeps 3-4 hour, fills nitrogen;

9), re-baking: at holding stage, temperature reaches 700-800 ℃, and soaking time is 10-20 hour;

10), greying: in inner string graphitization stove, finish electric power feeding time 30-33 hour;

11), mechanical workout moulding.

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