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Process for preparing modified asphalt

A production process and modified asphalt technology, which is applied in the field of asphalt processing, can solve the problems of asphalt being easy to coke, etc., and achieve the effects of good product quality, improved control accuracy, and reduced production costs

Inactive Publication Date: 2007-05-30
杨东平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of production process of modified asphalt in view of the deficiencies in the prior art, which solves the problem that the bottom of the tank is easy to coke when the asphalt is thermally polymerized, thereby effectively controlling the QI content in the asphalt, and the production process is simple. Easy to operate and control, high product quality

Method used

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  • Process for preparing modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Sectional heating

[0021] Medium-temperature asphalt raw materials are kept warm in a medium-temperature tank at a temperature of 355°C and 3 / h is continuously sent to the heating system for heating. The heating system is a flat shot furnace, which is divided into 3 sections to heat up, and each section is evenly raised by 10°C to 385°C.

[0022] (2) Modified

[0023] The heated asphalt enters five heat-retaining reforming tanks simultaneously, the reaction temperature is 385°C, and after continuous stirring for 13 hours, the temperature of the reforming tanks is cooled to 170°C, and the cooling time is 6 hours. The heat preservation and cooling of the reforming kettle are completed by the heat transfer oil provided by the heat transfer oil furnace and the heat transfer oil cooler.

[0024] (3) cooling forming

[0025] The modified asphalt is sent to the intermediate cooling tank, and the intermediate cooling tank is 40m 3 / h circulation volume backflow at the...

Embodiment 2

[0027] (1) Sectional heating

[0028] Medium-temperature asphalt raw materials are kept warm in a medium-temperature tank with a temperature of 360°C and 3 / h is continuously fed into the heating system for heating. The heating system consists of four flat-fire furnaces, each of which is divided into four sections, and the temperature is raised in four sections.

[0029] (2) Modified

[0030] The heated bitumen is simultaneously fed into 5 reforming tanks respectively, the reaction temperature is 392°C, after continuous stirring for 11 hours, the temperature of the reforming tank is cooled to 175°C, and the cooling time is 7 hours. The heat preservation and cooling of the reforming kettle are completed by the heat transfer oil provided by the heat transfer oil furnace and the heat transfer oil cooler.

[0031] (3) cooling forming

[0032] The modified asphalt is sent to the intermediate cooling tank, and the intermediate cooling tank is 45m 3 / h circulation volume backflow...

Embodiment 3

[0034] (1) Sectional heating

[0035] Medium-temperature asphalt raw materials are kept warm in a medium-temperature tank at a temperature of 365°C and 3 / h is continuously sent to the heating system for heating. The heating system consists of three flat-fire furnaces, each of which is divided into one section, and the heating is divided into three sections.

[0036] (2) Modified

[0037] The heated asphalt enters 5 reforming tanks simultaneously, the reaction temperature is 395°C, after continuous stirring for 10 hours, the temperature of the reforming tanks is cooled to 170°C, and the cooling time is 6 hours. The heat preservation and cooling of the reforming kettle are completed by the heat transfer oil provided by the heat transfer oil furnace and the heat transfer oil cooler.

[0038] (3) cooling forming

[0039] The modified asphalt is sent to the intermediate cooling tank, and the intermediate cooling tank is 50m 3 / h circulation volume backflow at the same time wit...

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Abstract

The invention discloses a manufacturing technique of modified tar, which comprises the following steps: heating tar segment by segment; evening heat conductive oil to modify; cooling to generate steam; moulding tar.

Description

technical field [0001] The invention relates to asphalt processing technology, in particular to a production process of modified asphalt. Background technique [0002] Modified pitch (also known as high softening point coal pitch or high temperature coal pitch or hard pitch) is mainly used in graphite electrode binder, high temperature pitch anode paste, graphite anode binder for aluminum, binder in brush production, etc. At present, there are mainly the following production methods: (1) Intermittent pressurized thermal polymerization production with medium-temperature asphalt as raw material, which is to input molten medium-temperature asphalt into a closed kettle, slowly heat it to a specified temperature, and keep it under a certain pressure for a period of time After leaving the kettle, it is an intermittent operation. During the thermal polymerization process, the reaction temperature is 400°C; the pressure is 0.8-1.0MPa; the time is 4-8 hours, etc. are the best reactio...

Claims

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Application Information

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IPC IPC(8): C10C3/10
Inventor 杨东平
Owner 杨东平
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