Preparation method of TiB2/C gradient cathode material for aluminum electrolytic bath

A cathode material and aluminum electrolytic cell technology, applied in the field of electrolytic aluminum, can solve the problem of easy peeling off of the cathode material coating, and achieve the effects of solving the coating peeling defect, reducing the cost, and having strong sodium corrosion resistance.

Inactive Publication Date: 2009-12-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies in current aluminum electrolytic cell cathode materials and preparation methods, the present invention provides a TiB for aluminum electrolytic cell 2 Preparation method of / C gradient cathode material to solve carbon and TiB 2 The thermal mismatch of the cathode material causes problems such as easy peeling of the coating during use, and improves the anti-sodium corrosion performance of the cathode material, the current efficiency of the aluminum electrolytic cell, and the life of the electrolytic cell

Method used

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  • Preparation method of TiB2/C gradient cathode material for aluminum electrolytic bath
  • Preparation method of TiB2/C gradient cathode material for aluminum electrolytic bath
  • Preparation method of TiB2/C gradient cathode material for aluminum electrolytic bath

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The raw material used is TiB 2 , Carbonaceous aggregates and binders.

[0035] Of which TiB 2 The particle size requirement is 100μm, and the purity is 97%;

[0036] Choose one of the following ①, ②, ③, ④ or ⑤ for the binder:

[0037] ① One of coal tar with 65% solid content, petroleum pitch with 65% solid content, coal tar with 45% coking value, epoxy resin 6101, or furan resin with a molecular weight of 4500;

[0038] ②Composition obtained by mixing epoxy resin 6101 and coal tar pitch with a solid content of 65% at a weight ratio of 1:4;

[0039] ③ A composition obtained by mixing furan resin with a molecular weight of 5000 and petroleum pitch with a solid content of 55% in a weight ratio of 1:1;

[0040] ④Composition obtained by mixing coal tar with a coking value of 40% and epoxy resin 6101 at a weight ratio of 2:1;

[0041] ⑤Composition obtained by mixing coal tar with a coking value of 45%, epoxy resin 6101 and furan resin with a molecular weight of 5000 in a weight r...

Embodiment 2

[0061] The raw material used is TiB 2 , Carbonaceous aggregates and binders.

[0062] Of which TiB 2 The particle size requirement is 10μm, and the purity is 95%;

[0063] Choose one of the following ①, ②, ③, ④ or ⑤ for the binder:

[0064] ① A composition obtained by mixing coal tar with 75% solid content, petroleum pitch with 75% solid content, and coal tar with 28% coking value in a weight ratio of 1:2:3;

[0065] ②Composition obtained by mixing epoxy resin 634 product and coal tar pitch with a solid content of 75% in a weight ratio of 3:4;

[0066] ③The composition obtained by mixing furan resin product with a molecular weight of 6800 and petroleum pitch with a solid content of 85% in a weight ratio of 3:1;

[0067] ④Composition obtained by mixing coal tar with 28% coking value and epoxy resin 634 product at a weight ratio of 5:1;

[0068] ⑤Composition obtained by mixing coal tar with a coking value of 45%, epoxy resin 634 product, and furan resin product with a molecular weig...

Embodiment 3

[0089] The raw material used is TiB 2 , Carbonaceous aggregates and binders.

[0090] Of which TiB 2 The particle size requirement is 200μm, and the purity is 97%;

[0091] Choose one of the following ①, ②, ③, ④ or ⑤ for the binder:

[0092] ①It is obtained by mixing coal tar with 75% solid content, petroleum pitch with 75% solid content, coal tar with 48% coking value, epoxy resin 6101 and furan resin with a molecular weight of 7000 in a weight ratio of 1:1:1:1:1 Compositions;

[0093] ②Composition obtained by mixing epoxy resin 6101 product and petroleum asphalt with a solid content of 90% in a weight ratio of 1:6;

[0094] ③A composition obtained by mixing a furan resin product with a molecular weight of 7000 and a petroleum pitch with a solid content of 75% in a weight ratio of 1:8;

[0095] ④Composition obtained by mixing coal tar with 48% coking value and epoxy resin 634 product at a weight ratio of 10:1;

[0096] ⑤Composition obtained by mixing coal tar with a coking value ...

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Abstract

The invention relates to a preparation method of TiB2 / C gradient cathode material for an aluminum electrolytic bath, which belongs to the technical field of electrolytic aluminum. The adopted raw materials comprise TiB2, carbon aggregate and cementing agent. The procedure is continuous dosing, continuous mixing and paving and adopts the sequence as follows: the content of the TiB2 in each layer sequentially increases and changes from a bottom layer to a surface layer, and the content of the carbon aggregate sequentially reduces and changes; or the content of the TiB2 sequentially reduces and changes, and the content of the carbon aggregate sequentially increases and changes; the materials paved layer by layer are hot-pressed and sintered, and then are naturally cooled to the room temperature so as to obtain the product. Because micro components of the materials prepared by the invention sequentially change, the invention can better solve the problems of easy coating shedding and the like caused by thermal mismatching of carbon and TiB2; meanwhile, the cathode material has strong sodium corrosion resistance, can remarkably improve the current efficiency of the electrolytic bath, and prolongs the service life of the electrolytic bath.

Description

Technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and specifically relates to a method for preparing a cathode material of an aluminum electrolytic cell. Background technique [0002] The Hall-Elut electrolysis method for aluminum production has the following shortcomings: 1. Using consumable carbon anodes for production, high-quality carbon consumption (500 ~ 600kg / t-Al); 2. Serious environmental pollution, emitting a large amount of CO 2 (1.17t / t-Al) and carcinogens, fluorocarbons, etc.; 3. The cathode aluminum liquid has poor wettability. In order to avoid the fluctuation of the aluminum liquid, high pole-pitch operation is adopted, and the power consumption is high (14000~15000kwh / t-Al) ; 4. Single-chamber horizontal electrode, high production cost, low yield per unit area. Based on the above reasons, the domestic and foreign aluminum industry intends to develop a new type of aluminum electrolysis cell. The characteristics of this a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
Inventor 张廷安豆志河牛丽萍刘燕任晓冬蒋孝丽赫冀成
Owner NORTHEASTERN UNIV
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