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Process for producing anode asphalt for refining aluminium

A production method and technology of asphalt, which is applied in the field of anode asphalt production for aluminum smelting, can solve the problems of high cost, complex operation and equipment, and product quality that cannot meet the requirements of anode adhesives, and achieve small footprint and excellent product quality , easy-to-operate effects

Inactive Publication Date: 2004-04-28
黑龙江黑化集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process operation and equipment of the above method are complicated, the cost is high, and the product quality still cannot meet the requirements of the anode binder as the aluminum smelting industry develops day by day.

Method used

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  • Process for producing anode asphalt for refining aluminium
  • Process for producing anode asphalt for refining aluminium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Continuously put the medium-temperature asphalt into the reactor 1, control the temperature within the range of 380-400°C, and the reaction residence time is 7.0 to 7.5 hours. Thermal polymerization is carried out under stirring, and the liquid medium-temperature asphalt after thermal polymerization is discharged continuously and sent to the middle tank 4. During the thermal polymerization process of the reaction kettle, the flash oil flashed out is converted into the middle tank through the condensing cooler 6, and the flash oil conversion amount is flash oil: medium temperature asphalt is 1.2:100, mixed evenly and passed through the liquid The pump 5 sends it into the head tank 7, and then flows into the asphalt plate machine 8 to cool the formed granular solid anode asphalt product. The quality index of the anode pitch is:

[0024] Softening point, ℃96.0 Toluene insoluble matter, %28.9 Quinoline insoluble matter, %8.0

[0025] β-resin, %19.1 C content, %52.4 Ash, %0...

Embodiment 2

[0027] Example 2 has the same production process steps as Example 1, except that the ratio of flash oil to medium-temperature asphalt is 1.5:100. The obtained anode pitch quality index is:

[0028] Softening point, ℃95.1 Toluene insoluble matter, %29.4 Quinoline insoluble matter, %8.1

[0029] β-resin, %18.6 C content, %53.1 Ash, %0.15

Embodiment 3

[0031] Put the medium-temperature bitumen from the secondary evaporator into the reactor 1, heat it to 380-400°C in the reactor, and carry out thermal polymerization reaction under stirring for 7.0 hours, and then send the reacted bitumen into the asphalt middle tank 4, in the The flash oil that flashes out during the polymerization reaction of medium-temperature pitch in the reaction kettle is cooled by the condensing cooler 6 and then returned to the intermediate tank. The ratio of the converted flash oil to the medium-temperature asphalt added to the raw material is 1.2:100. After being mixed evenly, it is sent to the high-level tank 7 through the submerged pump 5, and then the self-flowing asphalt plate machine 8 is used to cool and form a solid anode asphalt product. The quality index of the anode pitch is:

[0032] Softening point, ℃96.8 Toluene insoluble matter, %28.6 Quinoline insoluble matter, %7.8

[0033] β-resin, % 21.0 C content, % 54 Ash, % 0.13

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Abstract

The production process of anode asphalt for refining aluminium includes the hot polymerization of medium temperature asphalt as liquid material, additon of flash distillation oil, cooling to form packing and other steps. In the present invention, single reactor hot polymerization and returned flash distillation oil mixing are adopted in producing high quality anode asphalt. The product has wide application.

Description

technical field [0001] The invention relates to pitch for smelting industry, in particular to a production method suitable for anode pitch for aluminum smelting. technical background [0002] At present, in the metallurgical industry, coal tar pitch is usually used as the binder for graphite electrodes for electric furnace steelmaking, anodes for aluminum smelting, and general carbon electrodes. Coal tar pitch is usually a by-product of the coking industry. Coal tar is distilled to obtain a tower bottom concentrate. It is a very complex mixture of macromolecular polycyclic aromatic hydrocarbons, condensed ring aromatic hydrocarbons and heterocyclic systems. The coal tar pitch Low softening point, low resin content, high volatile matter, low toluene insolubles, low coking value, etc., the electrode products produced by it have high specific resistance, poor oxidation resistance and thermal stability, and low mechanical strength. The coal tar pitch used in the aluminum smelti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/00C10C3/02C25C3/12
Inventor 朱勋绩刘征宇王宽起金明达阎树忠
Owner 黑龙江黑化集团有限公司