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Preparation method of binder asphalt, binder asphalt and electrode for aluminum smelting

A technology of binder asphalt and asphalt, which is applied in the direction of processing tar asphalt/petroleum asphalt/natural asphalt, processing of tar asphalt/petroleum asphalt/natural asphalt, petroleum industry, etc. Pores, blocked surface openings, etc.

Active Publication Date: 2021-06-29
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the content of heavy components is increased through the usual thermal modification, a large number of large-sized mesophases will be produced in the asphalt. When the binder asphalt is kneaded with the aggregate coke, it will block the surface pores of the coke and prevent the asphalt from infiltrating into the coke. coke inner hole

Method used

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  • Preparation method of binder asphalt, binder asphalt and electrode for aluminum smelting
  • Preparation method of binder asphalt, binder asphalt and electrode for aluminum smelting
  • Preparation method of binder asphalt, binder asphalt and electrode for aluminum smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Tar 1 and 2 are produced by different coking enterprises, and cinder and coal ash are removed by centrifugal treatment. Toluene was added to the purified coal tar in an amount of 8%, and mixed uniformly by a mixer with a stirring paddle at a mixing temperature of 70°C. The mixed tar is passed into the electrolytic reactor, the anode is lead dioxide, and the cathode is graphite. The voltage is 3V and the current is 5mA. After 6 minutes of electrochemical reaction, the processed tar on the anode plate was scraped off with a scraper, and the above reaction was repeated to collect the processed tar.

[0072] The QI1 of the processed tar 1 after the above treatment is 2.02% by mass, and the CV1 is 24.9%. The QI2 and CV2 of the processed tar 2 are 6.12% and 28.4% respectively. After mixing according to the ratio of 65:35, the mixed tar 12 is obtained and then decompressed Medium-temperature pitch 12 was obtained by distillation, which was blown into the pitch at a reforming...

Embodiment 2

[0074] Tar 1 and 2 are produced by different coking enterprises, and cinder and coal ash are removed by centrifugal treatment. Toluene was added to the purified coal tar in an amount of 8%, and mixed uniformly by a mixer with a stirring paddle at a mixing temperature of 70°C. The mixed tar is passed into the electrolytic reactor, the anode is lead dioxide, and the cathode is graphite. The voltage is 3V and the current is 5mA. After 6 minutes of electrochemical reaction, the processed tar on the anode plate was scraped off with a scraper, and the above reaction was repeated to collect the processed tar. Processed tar 2 and 3 processed above, QI2 and CV2 of processed tar 2 are 6.12%, 28.4% respectively, processed tar 3QI3 is 3.40% by mass, CV3 26.4%, mixed according to the ratio of 55:45 to obtain mixed tar 23 was further subjected to vacuum distillation to obtain medium-temperature pitch 23, which was blown into the pitch at a reforming temperature of 310°C at a steam injecti...

Embodiment 3

[0087] Processed tar 1 and 2 were obtained in the same manner as in Example 1. The QI1 of tar 1 was 2.02% by mass, and the CV1 was 24.9%. The QI2 and CV2 of tar 2 were 6.12% and 28.4%, respectively, and mixed according to the ratio of 65:35 to obtain mixed tar 12 Further vacuum distillation was carried out to obtain medium-temperature pitch 12, which was blown into the pitch at a reforming temperature of 300°C with a steam injection rate of 30kg steam / t pitch, and then thermally reformed for 12 hours to obtain binder pitch 12 (1) . The softening point (SP) of gained binder pitch 12 (1) is shown in the binder pitch column of table 2, quinoline insoluble matter (QI), comprises the content of primary and secondary QI, coking value (CV) , viscosity (160°C) and 360°C fraction. The binder pitch coking value is 64 through calculation.

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Abstract

The invention provides a preparation method of binder asphalt. The preparation method comprises the following steps: a, mixing a plurality of original tar raw materials into mixed coal tar, purifying the mixed coal tar, and carrying out an electrochemical oxidation reaction to obtain pretreated processed coal tar, wherein the quinoline insoluble content of the processed coal tar is 2% by mass or more and less than 20% by mass; b, distilling the processed coal tar to obtain medium-temperature pitch; c, carrying out thermal polymerization reaction on the medium-temperature pitch to obtain a polymer component; and d, evaporating low-molecular components in the polymer component to obtain the binder asphalt. The binder asphalt prepared by the preparation method has relatively low viscosity, and can fully wet aggregate coke when being applied to an electrode for aluminum smelting. A composite material formed by the binder asphalt and the aggregate coke is relatively high in stacking density and high in mechanical strength after being roasted. Thus, the resistivity of the electrode for aluminum smelting can be reduced, and consumption and cost in an aluminum smelting production process are reduced. The invention also relates to the binder asphalt and the aluminum smelting electrode.

Description

technical field [0001] The invention belongs to the field of asphalt, and more specifically relates to a preparation method of binder pitch, binder pitch and an electrode for aluminum smelting. Background technique [0002] Carbon materials or carbon / carbon composite materials for electrodes for aluminum smelting are required to have properties such as high mechanical strength, high electrical conductivity, and high thermal conductivity. In order to satisfy the above properties, aggregates (petroleum coke, pitch coke, etc.) need to be bonded to each other through a binder, and modified pitch made of coal tar or the like is generally used as a binder. Then kneading, firing, and graphitization are used to manufacture carbon composite materials such as aluminum smelting electrodes. Coal tar is obtained by cooling and condensing gas produced by carbonizing coal such as bituminous coal and anthracite at 1100 to 1350° C. in a coke oven. [0003] The main performance indicators o...

Claims

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Application Information

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IPC IPC(8): C10C3/06C10C3/00C25C3/12
CPCC10C3/00C10C3/06C25C3/125
Inventor 庞伟伟刘哲朱来福霍国山张志敏桑小江李现芳
Owner BEIJING RISUN TECH CO LTD
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