Preparation method and device of high-softening-point asphalt, high-softening-point asphalt, and binding agent prepared from high-softening-point asphalt

Abstract

The invention provides a preparation method of high-softening-point asphalt, which comprises the following steps: introducing modified asphalt into a single container, and introducing inert gas into the single container, wherein the single container is sequentially provided with at least three independent heating zones from top to bottom, an independent heater is arranged in each heating zone, the heating temperatures gradually increase, and the reaction pressure is 0.03-0.05 MPa; and after heating the modified asphalt to the target temperature, keeping the temperature for 6-18 hours, thereby obtaining the high-softening-point asphalt. The invention also provides a preparation device, a prepared high-softening-point asphalt and a binding agent prepared from the high-softening-point asphalt. The invention can control the softening point of the modified asphalt within a narrow range, so that the modified asphalt has more stable quality, and the high-softening-point asphalt and binding agent with high softening point and high fixed carbon content can be prepared.

Description

technical field [0001] The invention relates to the preparation of high softening point asphalt, in particular to a process for preparing high softening point asphalt by heating a monomer container and the equipment used. Background technique [0002] At present, modified asphalt is a product obtained after deep processing of coal tar, which is a product obtained by atmospheric distillation and vacuum distillation of coal tar. [0003] Now, as the requirements for the environment and energy are getting higher and higher, small-scale steelmaking blast furnaces are gradually being eliminated, and the softening point of refractory binders currently used in the market to repair steelmaking blast furnaces is generally 150°C ~160°C, and the carbon content is very low, so it is unstable at high temperatures. With the increasing scale of steelmaking blast furnaces and higher working temperatures, the current refractory binders have far reached Less than required. Asphalt is one of...

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Problems solved by technology

However, when heating in the existing reactor, the modified asphalt itself is relatively viscous and has poor thermal conductivity. Therefore, when the temperature in the reactor is raised, the temperature of the modified asphalt itself is difficult to control properly, resulting in poor heating. In general, the quality of the produced high softening point special asphalt is not stable enough, that is, the softening point of the product cannot be controlled within a narrow range

Also because of this reason, the average softening point of asphalt is generally not high at present. When the required softening point is higher, the softening point of the asphalt will not be controlled within a narrow range due to uneven heating.

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