CN104559253A - Preparation method for improving asphalt performance by using coal direct liquefied residues - Google Patents
Preparation method for improving asphalt performance by using coal direct liquefied residues Download PDFInfo
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Abstract
The invention relates to a preparation method for improving asphalt performance by using coal direct liquefied residues and belongs to the field of pavement petroleum asphalt. The coal direct liquefied residues modified asphalt which is excellent in performance and low in price is prepared by adding 5-10% of granular coal direct liquefied residues and 2-3% of rubber oil into matrix asphalt to be stirred at a high temperature (150-160 DEG C), so that the additional value of the coal direct liquefied residues is improved. As the coal direct liquefied residues, the rubber oil and petroleum asphalt are same substances and are good in compatibility, the separation phenomenon is avoided. Meanwhile, the price for improving asphalt performance by using coal direct liquefied residues is far lower than that of conventional SBS modified asphalt, so that the preparation method is an economical and practical technical method.
Description
Technical field
The present invention relates to the preparation method utilizing coal directly-liquefied residue to improve asphalt performance, relating to a kind of preparation method improving asphalt performance by adding coal directly-liquefied residue in pitch specifically.
Background technology
Coal direct liquefaction is at high temperature (more than 400 DEG C), high pressure (more than 10MPa), under catalysts and solvents effect, make the molecule of coal carry out Hydrocracking, directly change into liquid fuel, processing and refining becomes the oil fuel such as gasoline, diesel oil, also known as hydrogenation liquefaction further again.In DCL/Direct coal liquefaction process, the byproduct of 30% can be produced---residue, i.e. coal directly-liquefied residue.
The composition of coal directly-liquefied residue and character depend on the kind of liquefaction coal, liquefaction process condition and solid-liquid separating method, and wherein determinative is solid-liquid separating method, and I crosses most of liquefaction process and tend to adopt underpressure distillation isolation technique at present.Coal directly-liquefied residue is the material of a kind of high charcoal, high-sulfur and height ash, containing up to 30% ~ 50% heavy oil and asphaltene class product, the properties-correcting agent as pitch can be applied, to improve the performance of pitch.
Rubber oil is a kind of dark thick liquid, abstracts from crude oil.Rubber oil has good consistency, and the feature such as high temperature resistant, low volatilization, it can as auxiliary agent for increasing the anti-aging of pitch and low-temperature performance.
The current conventional properties-correcting agent improving asphalt performance is the macromolecule modifiers such as SBS, SBR, EVA and PE.Because these properties-correcting agent itself are a kind of macromolecular materials, not easily compatible with pitch, segregation phenomenon can be produced with pitch time serious, thus not only can not improve the performance of pitch, also can play the effect destroying asphalt performance.Meanwhile, the price comparison of the macromolecule modifiers such as SBS, SBR, EVA and PE is high, easily causes the cost of pitch to increase considerably.
Zhu Weiping have studied the impact on asphalt performance of coal directly-liquefied residue addition, compounding process and compounding temperature in " research of coal directly-liquefied residue modifying asphalt " literary composition, but what adopt is 25 DEG C of ductilities, this point does not conform to the low-temperature performance index (5 DEG C of ductilities) of modifying asphalt with " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004), therefore cannot judge the improvement effect of coal directly-liquefied residue to pitch low-temperature performance.
King stockaded village rosy clouds etc. have studied the impact on asphalt performance under the addition of different coal directly-liquefied residue 7% in " coal directly-liquefied residue is on the preliminary assessment of modifying road asphalt effect " literary composition, but still employing is 25 DEG C of ductilities, this point does not conform to the low-temperature performance index (5 DEG C of ductilities) of modifying asphalt with " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004), therefore cannot judge the improvement effect of coal directly-liquefied residue to pitch low-temperature performance.
In a word, improve in the research of asphalt performance existing at present to coal directly-liquefied residue as properties-correcting agent, the index of the reflection pitch low-temperature performance that great majority adopt is incorrect, correctly cannot judge that the low temperature of coal directly-liquefied residue to pitch improves effect.Therefore, be extremely necessary to develop a kind of comprehensive preparation technology improving asphalt performance, overcome prior art and defect economically.
Summary of the invention
Problem to be solved by this invention is: provide a kind of preparation method, effectively can improve the performance of pitch comprehensively.
Object of the present invention is achieved through the following technical solutions:
Select coal directly-liquefied residue as properties-correcting agent, rubber oil, as auxiliary agent, adds coal directly-liquefied residue and the rubber oil of optimum amount in pitch, improves the performance of pitch comprehensively, and make its performance close to or reach the technological standard of SBS modifying asphalt.
Owing to utilizing coal directly-liquefied residue as properties-correcting agent and rubber oil as auxiliary agent, wherein coal directly-liquefied residue its contain up to 30% ~ 50% heavy oil and asphaltene class product, and rubber oil is aromatic hydrocarbons type material, all belongs to allied substances with pitch.According to " compatible similar " principle, coal directly-liquefied residue, between rubber oil and pitch, segregation phenomenon can not be produced.Meanwhile, because coal directly-liquefied residue can improve the high-temperature behavior of pitch, and rubber oil can strengthen the ductility of pitch, thus significantly can improve high temperature and the low-temperature performance of pitch; In addition, because coal directly-liquefied residue existing market price is about 800 yuan/ton, and the existing market price of SBS modifier is about 20,000 yuan/ton, comparatively speaking, utilize coal directly-liquefied residue can not significantly improve the cost of pitch as asphalt modifier, the technology of the present invention has more economy.
Concrete implementation step is:
Step one: the technical indicator of test coal directly-liquefied residue, its ash oontent of stress test, ensures that the ash oontent of coal directly-liquefied residue is lower than 10%;
Step 2: coal directly-liquefied residue is pulverized in atomizer mill, the particle diameter after pulverizing is not more than 2mm;
Step 3: the technical indicator of test matrix pitch, ensures that its technical indicator meets the relevant regulations in " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004);
Step 4: the coal directly-liquefied residue of 5 ~ 10% to be joined in pitch and to mix, and then add the rubber oil of 2 ~ 3%, the technical indicator of pitch after test mixing is even, ensures that its technical indicator meets the relevant regulations in " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004); If the performance index of pitch do not meet the relevant regulations in " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) after mixing, then need the ratio readjusting coal directly-liquefied residue and rubber oil, until it meets relevant regulations, and determine the optimum amount of coal directly-liquefied residue and rubber oil.
Step 5: prepared by product: squeeze in retort by the matrix pitch of 150 ~ 160 DEG C, add the coal directly-liquefied residue under optimum amount, by retort insulation at 150 ~ 160 DEG C, start and stir, stir 0.5 ~ 1h, and then the rubber oil added under optimum amount, continue stirring 0.5 ~ 1h, carry out quality test qualified after coal directly-liquefied residue modifying asphalt finished product.
Determine that the method for optimum amount is: by the particulate state coal directly-liquefied residue and 2% of 5%, 6%, 7%, 8%, 10%, 2.5%, 3% rubber oil intersect coordinate, form 15 kinds of mixing ratios, join respectively in matrix pitch, the technical indicator of pitch after test mixing, choose the mixing ratio wherein meeting technical requirements, carry out econmics comparison, coal directly-liquefied residue and the rubber oil consumption of the mixing ratio of its economy the best are optimum amount.
The present invention adopt coal directly-liquefied residue as properties-correcting agent and rubber oil as auxiliary agent to improve the performance of pitch, because coal directly-liquefied residue, consistency between rubber oil and pitch are good, can not segregation phenomenon be produced, the performance of pitch can be improved comprehensively.Meanwhile, adopt coal directly-liquefied residue as properties-correcting agent, its price is well below the price of traditional SBS modifier, and therefore, the present invention is a kind of economical and practical technological method.
Embodiment
Below in conjunction with specific examples, the present invention will be further described, but content of the present invention is not only confined to the following examples.
Embodiment 1
Step one: the technical indicator of test coal directly-liquefied residue and rubber oil, the results are shown in Table 1 and table 2.
The performance index of table 1. coal directly-liquefied residue
TFOT residue (163 DEG C, 5h)
As shown in Table 1: the ash oontent of coal directly-liquefied residue is less than 10%.
The performance index of table 2 rubber oil
The performance index of table 2 rubber oil
Step 2: coal directly-liquefied residue is pulverized in atomizer mill, the particle diameter after pulverizing is not more than 2mm;
Step 3: the technical indicator of test No. 70 bi tumenf orr oads, the results are shown in Table 3.
The performance index of table 3.70 bi tumenf orr oad
The performance index of table 3.70 bi tumenf orr oad
As shown in Table 3: No. 70 bi tumenf orr oad performance index all meet the technical requirements of No. 70 bi tumenf orr oads relevant in " standard specification for construction and acceptance of highway asphalt pavement " JTG F40-2004.
Step 3: 7% coal directly-liquefied residue (with pitch weight ratio) to be joined in pitch and to mix, and then adding the rubber oil (with pitch weight ratio) of 2%, test mixing evenly after the technical indicator of pitch, in table 4.
Table 4. mixes the performance index of rear pitch
Table 4. mixes the performance index of rear pitch
As shown in Table 4: the technical indicator mixing rear pitch all meets the technical requirements of I-D in SBS modifying asphalt relevant in " standard specification for construction and acceptance of highway asphalt pavement " JTG F40-2004.
Step 4: Product processing.The matrix pitch of 150 ~ 160 DEG C is squeezed in retort, add 7% coal directly-liquefied residue, by retort insulation at 150 ~ 160 DEG C, start and stir, stir 0.5 ~ 1h, and then add 2% rubber oil, continue stirring 0.5 ~ 1h, carry out quality test qualified after coal directly-liquefied residue modifying asphalt finished product.
Embodiment 2
Step one: the technical indicator of test coal directly-liquefied residue and rubber oil, the results are shown in Table 5 and table 6.
The performance index of table 5 coal directly-liquefied residue
The performance index of table 5 coal directly-liquefied residue
TFOT residue (163 DEG C, 5h)
As shown in Table 5: the ash oontent of coal directly-liquefied residue is less than 10%.
The performance index of table 6 rubber oil
The performance index of table 6 rubber oil
Step 2: coal directly-liquefied residue is pulverized in atomizer mill, the particle diameter after pulverizing is not more than 2mm;
Step 3: the technical indicator of test No. 90 bi tumenf orr oads, the results are shown in Table 7.
The performance index of table 7.90 bi tumenf orr oad
The performance index of table 790 bi tumenf orr oad
As shown in Table 7: No. 90 bi tumenf orr oad performance index all meet the technical requirements of No. 90 bi tumenf orr oads relevant in " standard specification for construction and acceptance of highway asphalt pavement " JTG F40-2004.
Step 4: 8% coal directly-liquefied residue (with pitch weight ratio) to be joined in pitch and to mix, and then adding 2.5% rubber oil (with pitch weight ratio), test mixing evenly after the technical indicator of pitch, in table 8.
Table 8 mixes the performance index of rear pitch
Table 8 mixes the performance index of rear pitch
As shown in Table 8: the technical indicator mixing rear pitch all meets the technical requirements of SBS modifying asphalt I-C relevant in " standard specification for construction and acceptance of highway asphalt pavement " JTG F40-2004.
Step 5: Product processing.The matrix pitch of 150 ~ 160 DEG C is squeezed in retort, add the coal directly-liquefied residue of 8%, by retort insulation at 150 ~ 160 DEG C, start and stir, stir 0.5 ~ 1h, and then add 2.5% rubber oil, continue stirring 0.5 ~ 1h, carry out quality test qualified after coal directly-liquefied residue modifying asphalt finished product.
Claims (2)
1. utilize coal directly-liquefied residue to improve the preparation method of asphalt performance, it is characterized in that comprising the following steps:
Step one: every characteristic of test coal directly-liquefied residue and matrix pitch, wherein the ash oontent of coal directly-liquefied residue is less than 10%:
Step 2: coal directly-liquefied residue is processed in atomizer mill the particulate state being less than 2mm;
Step 3: joined in matrix pitch by the particulate state coal directly-liquefied residue of 5 ~ 10% and mix, and then add 2 ~ 3% rubber oils, the technical indicator of pitch after test mixing, determines the optimum amount of coal directly-liquefied residue and rubber oil;
Step 4: prepared by product: squeeze in retort by the matrix pitch of 150 ~ 160 DEG C, add the coal directly-liquefied residue under optimum amount, by retort insulation at 150 ~ 160 DEG C, start and stir, stir 0.5 ~ 1h, then adding the rubber oil under optimum amount, continuing stirring 0.5 ~ 1h, carry out quality test qualified after coal directly-liquefied residue modifying asphalt finished product.
2. the preparation method utilizing coal directly-liquefied residue to improve asphalt performance according to claim 1, it is characterized in that the method determining optimum amount is: by the particulate state coal directly-liquefied residue and 2% of 5%, 6%, 7%, 8%, 10%, 2.5%, 3% rubber oil intersect coordinate, form 15 kinds of mixing ratios, join respectively in matrix pitch, the technical indicator of pitch after test mixing, choose the mixing ratio wherein meeting technical requirements, carry out price comparison, coal directly-liquefied residue and the rubber oil consumption of its cheapest mixing ratio are optimum amount.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105802652A (en) * | 2016-05-23 | 2016-07-27 | 神华集团有限责任公司 | Coal liquefaction residue modified asphalt and preparation method and application thereof |
| CN106380105A (en) * | 2016-08-30 | 2017-02-08 | 长安大学 | Asphalt concrete additive and preparation method thereof |
| CN106433166A (en) * | 2016-09-30 | 2017-02-22 | 陕西延长石油（集团）有限责任公司炼化公司 | Coal-based asphaltic sand-modified asphalt and preparation method thereof |
| CN107488351A (en) * | 2017-08-17 | 2017-12-19 | 江苏诺路桥工程检测有限公司 | Pouring asphalt cementitious matter prepared by a kind of coal liquefaction residue and preparation method thereof |
| CN109251539A (en) * | 2018-07-27 | 2019-01-22 | 北京建筑大学 | A kind of pair of coal directly-liquefied residue modified pitch carries out the physical method of increase-volume |
| CN109593369A (en) * | 2017-09-30 | 2019-04-09 | 神华集团有限责任公司 | Road asphalt modifier and modified pavement asphalt and preparation method thereof and asphalt |
| CN109777131A (en) * | 2017-11-15 | 2019-05-21 | 神华集团有限责任公司 | The method of modifying of DCL/Direct coal liquefaction pitch and modified DCL/Direct coal liquefaction pitch and its application |
| CN110358317A (en) * | 2019-08-07 | 2019-10-22 | 交通运输部公路科学研究所 | Coal liquefaction residue is used as the preparation method of road asphalt modifier |
| CN114479491A (en) * | 2021-12-14 | 2022-05-13 | 中路高科(北京)公路技术有限公司 | High-modulus asphalt containing coal liquefied asphalt and preparation method and application thereof |
| CN116004020A (en) * | 2022-12-16 | 2023-04-25 | 广州市北二环交通科技有限公司 | Preparation method of self-healing pre-curing asphalt |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0009275A2 (en) * | 1978-09-11 | 1980-04-02 | Bergwerksverband GmbH | Moulding compositions from thermoplastic resins and coal liquefaction residues |
| CN1827697A (en) * | 2006-03-30 | 2006-09-06 | 中国科学院山西煤炭化学研究所 | Road asphalt modifier and utilization method thereof |
| CN101735627A (en) * | 2010-01-11 | 2010-06-16 | 山东高速建设材料有限公司 | Waterproof material and preparation method thereof |
| CN102532926A (en) * | 2012-02-09 | 2012-07-04 | 镇江金阳道路材料科技发展有限公司 | Asphalt modifier for improving low temperature ductility and preparation method thereof |
| CN102775956A (en) * | 2012-08-08 | 2012-11-14 | 中国建筑材料科学研究总院苏州防水研究院 | Asphalt-based non-curable heat-resistant waterproof sealant and preparation method thereof |
| CN103275501A (en) * | 2013-06-08 | 2013-09-04 | 湖南云中沥青有限责任公司 | Asphalt regenerating agent for recycling waste asphalt, and preparation method and application thereof |
-
2013
- 2013-10-28 CN CN201310512293.7A patent/CN104559253B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0009275A2 (en) * | 1978-09-11 | 1980-04-02 | Bergwerksverband GmbH | Moulding compositions from thermoplastic resins and coal liquefaction residues |
| CN1827697A (en) * | 2006-03-30 | 2006-09-06 | 中国科学院山西煤炭化学研究所 | Road asphalt modifier and utilization method thereof |
| CN101735627A (en) * | 2010-01-11 | 2010-06-16 | 山东高速建设材料有限公司 | Waterproof material and preparation method thereof |
| CN102532926A (en) * | 2012-02-09 | 2012-07-04 | 镇江金阳道路材料科技发展有限公司 | Asphalt modifier for improving low temperature ductility and preparation method thereof |
| CN102775956A (en) * | 2012-08-08 | 2012-11-14 | 中国建筑材料科学研究总院苏州防水研究院 | Asphalt-based non-curable heat-resistant waterproof sealant and preparation method thereof |
| CN103275501A (en) * | 2013-06-08 | 2013-09-04 | 湖南云中沥青有限责任公司 | Asphalt regenerating agent for recycling waste asphalt, and preparation method and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| 中国公路学会高速公路运营管理分会主编: "《中国高速公路管理学术论文集（2014卷）》", 30 September 2014, 人民交通出版社股份有限公司 * |
| 朱伟平: ""煤直接液化残渣改性沥青的研究"", 《神华科技》 * |
| 王寨霞等: ""煤直接液化残渣对道路沥青改性作用的初步评价"", 《燃料化学学报》 * |
Cited By (13)
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|---|---|---|---|---|
| CN105802652B (en) * | 2016-05-23 | 2019-04-05 | 神华集团有限责任公司 | A kind of coal liquefaction residue modified pitch and its preparation method and application |
| CN105802652A (en) * | 2016-05-23 | 2016-07-27 | 神华集团有限责任公司 | Coal liquefaction residue modified asphalt and preparation method and application thereof |
| CN106380105A (en) * | 2016-08-30 | 2017-02-08 | 长安大学 | Asphalt concrete additive and preparation method thereof |
| CN106433166A (en) * | 2016-09-30 | 2017-02-22 | 陕西延长石油（集团）有限责任公司炼化公司 | Coal-based asphaltic sand-modified asphalt and preparation method thereof |
| CN107488351A (en) * | 2017-08-17 | 2017-12-19 | 江苏诺路桥工程检测有限公司 | Pouring asphalt cementitious matter prepared by a kind of coal liquefaction residue and preparation method thereof |
| CN109593369A (en) * | 2017-09-30 | 2019-04-09 | 神华集团有限责任公司 | Road asphalt modifier and modified pavement asphalt and preparation method thereof and asphalt |
| CN109593369B (en) * | 2017-09-30 | 2022-06-21 | 国家能源投资集团有限责任公司 | Road asphalt modifier, modified road asphalt, preparation method of modified road asphalt and asphalt mixture |
| CN109777131A (en) * | 2017-11-15 | 2019-05-21 | 神华集团有限责任公司 | The method of modifying of DCL/Direct coal liquefaction pitch and modified DCL/Direct coal liquefaction pitch and its application |
| CN109777131B (en) * | 2017-11-15 | 2021-08-17 | 国家能源投资集团有限责任公司 | Method for modifying coal direct liquefaction asphalt, modified coal direct liquefaction asphalt and application thereof |
| CN109251539A (en) * | 2018-07-27 | 2019-01-22 | 北京建筑大学 | A kind of pair of coal directly-liquefied residue modified pitch carries out the physical method of increase-volume |
| CN110358317A (en) * | 2019-08-07 | 2019-10-22 | 交通运输部公路科学研究所 | Coal liquefaction residue is used as the preparation method of road asphalt modifier |
| CN114479491A (en) * | 2021-12-14 | 2022-05-13 | 中路高科(北京)公路技术有限公司 | High-modulus asphalt containing coal liquefied asphalt and preparation method and application thereof |
| CN116004020A (en) * | 2022-12-16 | 2023-04-25 | 广州市北二环交通科技有限公司 | Preparation method of self-healing pre-curing asphalt |
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