CN113308025A - Method for directly preparing high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag - Google Patents
Method for directly preparing high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag Download PDFInfo
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- CN113308025A CN113308025A CN202110571464.8A CN202110571464A CN113308025A CN 113308025 A CN113308025 A CN 113308025A CN 202110571464 A CN202110571464 A CN 202110571464A CN 113308025 A CN113308025 A CN 113308025A
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
- C08K11/005—Waste materials, e.g. treated or untreated sewage sludge
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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Abstract
The invention discloses a method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag, which comprises the steps of mixing the gasified slag with a solvent, continuously grinding for 1-3 hours in a circulating horizontal grinder under the action of a proper amount of additives, separating ground slurry through suspension, then carrying out grading treatment in an ultrafine grading device, and carrying out vacuum gasification treatment on the graded ultrafine slurry to obtain the high-activity micro-nano superfine powder material. The invention aims to provide a method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag, the gasified slag can be directly prepared into the high-activity micro-nano superfine powder material by the method, the material has the composite property of carbon and silicate, and the material can be directly applied to an asphalt material due to higher surface activity, so that the comprehensive performance of the asphalt can be improved, the large-scale utilization rate of the gasified slag can be obviously improved, and the production cost of the asphalt can be reduced.
Description
Technical Field
The invention relates to the field of resource utilization of solid wastes, in particular to a method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag.
Background
At present, coal still occupies the leading position of energy consumption in China, and the coal gasification technology is developed in order to change the current situation of coal in the aspects of energy conservation and environmental protection in China and promote the clean utilization technology of coal resources in China. At present, although the productivity and yield of main products in the coal chemical industry in China are continuously kept in the first world for many years, the cleaning level is relatively low, and particularly the utilization problem of tailings after coal gasification becomes a common problem which restricts the development of the industry. Along with the annual increase of the oil and gas production yield of coal-to-liquid in China, the production amount of gasification slag is increased. According to statistics, the annual discharge amount of gasified slag in China in recent years exceeds 2700 million tons. Therefore, a new method and a new material for recycling and large-scale utilization of gasification slag are urgently needed to be developed.
At present, the gasified slag is mainly treated by stacking and burying, which not only occupies a large amount of land, but also pollutes the surrounding environment. Although the research make internal disorder or usurp on the related gasified slag is reported at home and abroad, the research is mostly in the laboratory research stage and is mostly concentrated in the fields of building materials, repairing agricultural soil, building roads and the like. The research and application of the novel micro-nano ultrafine powder material prepared from the gasified slag after surface activation treatment in emulsified asphalt has not been reported. The consumption of emulsified asphalt in China is huge, more than 410 tons of asphalt are needed for the construction of high-grade roads per kilometer, more than hundred million roads are needed for the construction and maintenance of the high-grade roads in China every year, and more than 2000 million tons of asphalt are consumed if the addition of 20% of the high-activity micro-nano ultrafine powder material prepared according to the patent is calculated, so that the technical level and the utilization rate of gasified slag recycling and large-scale utilization can be greatly improved, the effects of reducing the resource consumption of original asphalt micro powder and the asphalt production cost are achieved, and the method has important significance for the efficient and clean utilization of solid waste resources in China.
Disclosure of Invention
The invention aims to provide a method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag, the gasified slag can be directly prepared into the high-activity micro-nano superfine powder material by the method, the material has the composite property of carbon and silicate, and the material can be directly applied to an asphalt material due to higher surface activity, so that the comprehensive performance of the asphalt can be improved, the large-scale utilization rate of the gasified slag can be obviously improved, and the production cost of the asphalt can be reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag, which comprises the following steps of: and mixing the gasified slag with a solvent, continuously grinding for 1-3 hours in a circulating horizontal grinder under the action of a proper amount of additives, separating ground slurry through suspension, then grading the ground slurry in a superfine grading device, and performing vacuum gasification on the graded superfine slurry to obtain the high-activity micro-nano superfine powder material.
Furthermore, the water content of the gasified slag is less than or equal to 0.5 percent.
Further, the weight percentage of the gasified slag to the solvent is 1: 5-10.
Furthermore, the adding proportion of the used additive is 0.02-0.05% of the weight of the gasified slag.
Further, the additive is sodium dodecyl benzene sulfonate.
Further, the vacuum gasification treatment conditions are as follows: the vacuum distillation temperature is 40-80 ℃, the vacuum degree is-10 to-30 KPa, and the time is 30-90 min.
Furthermore, the addition proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 10-30%, the consumption of asphalt can be reduced, and the comprehensive performance of asphalt can be improved.
Compared with the prior art, the invention has the beneficial technical effects that:
the method can prepare the gasified slag into the high-activity micro-nano superfine powder material by one step and directly apply the material to the asphalt, wherein the addition amount of the asphalt reaches 10-30 percent, thereby not only saving the addition amount of the micro powder in the asphalt, but also saving resources and reducing production cost, and the method has the greatest advantage of remarkably improving the large-scale utilization rate of the gasified slag.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a flow chart of a preparation process for directly preparing a high-activity micro-nano ultrafine powder material for highway asphalt by utilizing gasified slag.
Detailed Description
As shown in fig. 1, a method for directly preparing a high-activity micro-nano ultrafine powder material for highway asphalt by using gasified slag comprises the following steps: and mixing the gasified slag with a solvent, continuously grinding for 1-3 hours in a circulating horizontal grinder under the action of a proper amount of additives, separating ground slurry through suspension, then grading the ground slurry in a superfine grading device, and performing vacuum gasification on the graded superfine slurry to obtain the high-activity micro-nano superfine powder material.
Wherein: the water content of the gasified slag is less than or equal to 0.5 percent. The weight percentage of the gasified slag to the solvent is 1: 5-10. The addition proportion of the used additive is 0.02-0.05% of the weight of the gasification slag. The additive is sodium dodecyl benzene sulfonate. The vacuum gasification treatment conditions are as follows: the vacuum distillation temperature is 40-80 ℃, the vacuum degree is-10 to-30 KPa, and the time is 30-90 min. The addition proportion of the prepared high-activity micro-nano superfine powder material in the emulsified asphalt for concrete is 10-30%, the consumption of asphalt can be reduced, and the comprehensive performance can be improved.
Example 1
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.5% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 5, the solvent is ethanol, the adding proportion of sodium dodecyl benzene sulfonate is 0.02 percent of the weight of the gasification slag, the mixture is continuously ground for 3 hours in a circulating horizontal grinding machine, ground slurry is separated by suspension and then enters a superfine grading device for grading treatment, the graded superfine slurry is subjected to vacuum gasification treatment, the vacuum distillation temperature is 40 ℃, the vacuum degree is-30 KPa, and the time is 30 min. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 30%, the comprehensive performance of the asphalt can be improved, the water seepage coefficient of the asphalt can reach 40/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water seepage coefficient of the asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.3MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
Example 2
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.3% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 10, the solvent is acetone, the adding proportion of sodium dodecyl benzene sulfonate is 0.05 percent of the weight of the gasified slag, the mixture is continuously ground for 1 hour in a circulating horizontal grinding machine, the ground slurry is separated by suspension and then enters a superfine grading device for grading treatment, the graded superfine slurry is subjected to vacuum gasification treatment, the vacuum distillation temperature is 80 ℃, the vacuum degree is-30 KPa, and the time is 90 min. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 20%, the comprehensive performance of asphalt can be improved, the water permeability coefficient of asphalt can reach 41ml/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water permeability coefficient of asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.5MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
Example 3
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.2% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 8, using methanol as a solvent, adding sodium dodecyl benzene sulfonate in a proportion of 0.05 percent of the weight of the gasified slag, continuously grinding for 2 hours in a circulating horizontal grinder, separating ground slurry by suspension, then entering a superfine grading device for grading treatment, and then carrying out vacuum gasification treatment on the graded superfine slurry, wherein the vacuum distillation temperature is 60 ℃, the vacuum degree is-20 KPa, and the time is 60 min. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 20%, the comprehensive performance of the asphalt is improved, the water permeability coefficient of the asphalt can reach 42ml/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water permeability coefficient of the asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.4MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
Example 4
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.5% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 8, using ethanol as a solvent, adding sodium dodecyl benzene sulfonate in a proportion of 0.05 percent of the weight of the gasified slag, continuously grinding for 2 hours in a circulating horizontal grinder, separating ground slurry by suspension, then grading in a superfine grading device, and then carrying out vacuum gasification on the graded superfine slurry, wherein the vacuum distillation temperature is 50 ℃, the vacuum degree is-10 KPa, and the time is 70 min. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 20%, the comprehensive performance of asphalt can be improved, the water permeability coefficient of asphalt can reach 42ml/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water permeability coefficient of asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.4MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
Example 5
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.5% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 9, the solvent is methanol, the adding proportion of sodium dodecyl benzene sulfonate is 0.04 percent of the weight of the gasification slag, the mixture is continuously ground for 2 hours in a circulating horizontal grinder, the ground slurry is separated by suspension and then enters a superfine grading device for grading treatment, the graded superfine slurry is subjected to vacuum gasification treatment, the vacuum distillation temperature is 80 ℃, the vacuum degree is-10 KPa, and the time is 40 min. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 30%, the comprehensive performance of asphalt can be improved, the water seepage coefficient of asphalt can reach 40ml/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water seepage coefficient of the asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.3MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
Example 6
The method comprises the following steps of taking gasified slag with the water content of less than or equal to 0.5% as a raw material, firstly mixing the gasified slag with a solvent, wherein the weight percentage of the gasified slag to the solvent is 1: 8, using acetone as a solvent, adding sodium dodecyl benzene sulfonate in a proportion of 0.02 percent of the weight of the gasification slag, continuously grinding for 3 hours in a circulating horizontal grinder, separating ground slurry through suspension, then entering a superfine grading device for grading treatment, and then carrying out vacuum gasification treatment on the graded superfine slurry, wherein the vacuum distillation temperature is 80 ℃, the vacuum degree is-10 KPa, and the time is 60 minutes. The high-activity micro-nano superfine powder material can be obtained, the adding proportion of the prepared high-activity micro-nano superfine powder material in emulsified asphalt for concrete is 10%, the comprehensive performance of the asphalt can be improved, the water permeability coefficient of the asphalt can reach 42ml/min by adding the high-activity micro-nano superfine powder material prepared by the patent, and the water permeability coefficient of the asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.4MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (7)
1. A method for directly preparing a high-activity micro-nano superfine powder material for highway asphalt by utilizing gasified slag is characterized by comprising the following steps of: and mixing the gasified slag with a solvent, continuously grinding for 1-3 hours in a circulating horizontal grinder under the action of a proper amount of additives, separating ground slurry through suspension, grading the ground slurry in a superfine grading device, and performing vacuum gasification on the graded superfine slurry to obtain the high-activity micro-nano superfine powder material.
2. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1, which is characterized by comprising the following steps of: the water content of the gasified slag is less than or equal to 0.5 percent.
3. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1, which is characterized by comprising the following steps of: the weight percentage of the gasified slag to the solvent is 1: 5-10.
4. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1 or 4, which is characterized by comprising the following steps of: the addition proportion of the used additive is 0.02-0.05% of the weight of the gasification slag.
5. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1, which is characterized by comprising the following steps of: the additive is sodium dodecyl benzene sulfonate.
6. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1, which is characterized by comprising the following steps of: the vacuum gasification treatment conditions are as follows: the vacuum distillation temperature is 40-80 ℃, the vacuum degree is-10 to-30 KPa, and the time is 30-90 min.
7. The method for directly preparing the high-activity micro-nano superfine powder material for the road asphalt by using the gasified slag according to claim 1, which is characterized by comprising the following steps of: the proportion of the prepared high-activity micro-nano superfine powder material added into emulsified asphalt for concrete is 10-30%, the consumption of the asphalt can be reduced, the comprehensive performance of the asphalt can be improved, the water permeability coefficient of the asphalt can reach 40-42 ml/min by adding the prepared high-activity micro-nano superfine powder material, and the water permeability coefficient of the asphalt without adding the material is about 45 ml/min; the bending tensile strength of the asphalt added with the high-activity micro-nano superfine powder material prepared by the method can reach 8.3-8.5 MPa, and the bending tensile strength of the asphalt not added is 8.1 MPa.
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