Technique for producing different softening point special bitumen by using native asphalt bitumen

Abstract

The invention discloses a process method for producing special asphalt with different softening points by utilizing natural asphalt. The invention solves the problem of a present lack of a production process of processing the special asphalt by utilizing the natural asphalt with a blending method, and provides the process method which has the advantages the process is simple, the production cost is low, and the temperature of the softening points is high, the method comprises the steps that firstly, residual oil or petroleum asphalt is taken as solvent; secondly, the solvent is heated to be in the state of Newtonian fluid; thirdly, natural asphalt powder is taken, according to the difference of product softening points, the natural asphalt powder and the solvent are uniformly added into the solvent with proportion of 2 to 65 : 100; fourthly, the natural asphalt powder is heated continuously and stirred to be melted, and the development is performed for 30 to 120 minutes; fifthly, for asphaltic products with the softening point being above 120 DEG C, material charging is performed for cooling, special machinery is used for performing crushing process, special asphalt power with the high softening point is obtained, and products with the softening point lower than 120 DEG C are fed into a finished product tank.

Description

technical field [0001] The invention relates to a production process of special asphalt, in particular to a process for producing special asphalt with different softening points by using natural asphalt. Background technique [0002] At present, the production methods of special asphalt are limited by the traditional petroleum asphalt processing conditions, and there are few methods. In the patent literature, there are only a few technologies related to natural asphalt. [0003] Learned by retrieval: 1, utilize the method for producing energy and high-grade asphalt (patent application number 01107278) of natural asphalt ore, this method is mainly so-called depolymerization and fracture process to natural asphalt ore simply, utilizes sulfuric acid, hydrochloric acid as fracture agent, Its disadvantage is that it uses external energy to decompose macromolecular hydrocarbons in natural bituminous ore, which is an uneconomical method with high energy consumption, and it is diffi...

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Problems solved by technology

[0003] Learned by retrieval: 1, utilize the method for producing energy and high-grade asphalt (patent application number 01107278) of natural asphalt ore, this method is mainly so-called depolymerization and fracture process to natural asphalt ore simply, utilizes sulfuric acid, hydrochloric acid as fracture agent, Its disadvantage is that it uses external energy to decompose macromolecular hydrocarbons in natural bituminous ore, which is an uneconomical method with high energy consumption, and it is difficult to produce in practice.

[0004] 2. Application of Qingchuan natural asphalt ore products in paving petroleum asphalt pavement (patent application number 200410040424). This method mainly states that natural asphalt powder can be used as an additive in paving petroleum asphalt pavement to improve road performance, but only It is only a reference application of natural asphalt in North America, and the application range is too small, for example: applications not included in industries such as oil drilling

[0005] 3. Modified asphalt material for roads and its preparation method (patent application number 02139460). The so-called modified asphalt is based on asphalt with the highest wax content, adding powdered styrene-butadiene rubber, natural asphalt ore, and organometallic soap It is different from special asphalt, which is not conducive to the manufacture of high oxidation point asphalt powder products

[0006] Therefore, there is currently no blending method for processing special asphalt using natural asphalt. As a result, the petroleum asphalt oxidation method is usually used to process special asphalt. Production