CN112358214A - Chemical activator for improving activity of coal gangue - Google Patents
Chemical activator for improving activity of coal gangue Download PDFInfo
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- CN112358214A CN112358214A CN202011420457.XA CN202011420457A CN112358214A CN 112358214 A CN112358214 A CN 112358214A CN 202011420457 A CN202011420457 A CN 202011420457A CN 112358214 A CN112358214 A CN 112358214A
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- coal gangue
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- chemical activator
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of new material processing, and discloses a chemical activator for improving the activity of coal gangue.
Description
Technical Field
The invention belongs to the technical field of new material processing, and particularly relates to a chemical activator for improving the activity of coal gangue.
Background
The coal gangue is solid waste discharged in the coal mining process and the coal washing process, and is a black and gray rock which has lower carbon content and is harder than coal and is associated with a coal bed in the coal forming process. Comprises tunneling waste rocks in the tunneling process of a roadway, waste rocks extracted from a top plate, a bottom plate and an interlayer in the mining process, and washing waste rocks extracted in the coal washing process. The main components of the material are Al2O3 and SiO2, and the material also contains Fe2O3, CaO, MgO, Na2O, K2O, P2O5, SO3 and trace rare elements (gallium, vanadium, titanium and cobalt).
The coal gangue is applied to the field of processing and manufacturing of building materials, and the performance and the manufacturing cost of the building materials can be obviously improved. However, the coal gangue is doped in the building energy-saving heat-insulating material, and the dosage of the coal gangue is only a little, because the great amount of doping can cause the loss of the whole structural strength. On the other hand, the coal gangue is not activated by a specific chemical excitant, so that the application of the coal gangue in the field of building materials is greatly limited.
Disclosure of Invention
The invention aims to provide a chemical activator for improving the activity of coal gangue, aiming at the existing problems.
The invention is realized by the following technical scheme:
a chemical activator for improving the activity of coal gangue is prepared from the following components in parts by weight: 16-19 parts of monocalcium phosphate, 90-95 parts of modified attapulgite, 5.0-6.0 parts of copper sulfate, 4.2-4.6 parts of potassium sulfate, 1.2-1.4 parts of boric acid and 3.4-3.8 parts of magnesium sulfate;
the preparation method of the modified attapulgite comprises the following steps: grinding attapulgite until the attapulgite is sieved by a sieve of 35-45 meshes, adding perlite powder with the mass ratio of 1.7-1.9%, uniformly mixing, putting the mixture into a crucible, putting the mixture into a muffle furnace, calcining the mixture for 4-5 hours at the temperature of 370-380 ℃, naturally cooling the mixture along with the furnace, adding water to prepare slurry with the solid content of 74-77%, adding 0.11-0.13 volume times of aqueous solution of dioctadecyl dimethyl ammonium chloride with the mass concentration of 0.65-0.70% into the slurry, stirring the mixture for 30-40 minutes at the speed of 140-150 rpm, continuously performing ultrasonic treatment for 10-15 minutes, then putting the mixture into a water bath kettle with the temperature of 60-70 ℃, stirring the mixture for 1-2 hours at constant temperature, taking the mixture out, transferring the mixture into a constant-temperature drying box with the temperature of 80-85 ℃, standing and aging the mixture for 20-24 hours, filtering the mixture to obtain a filtrate, and putting the filtrate into a sodium bicarbonate solution with the mass concentration of 0.34-0.36% according to the mass ratio of 1:1.6 Soaking for 10-15 min, filtering, and dewatering and drying in an airflow drier.
The particle size of the perlite powder is between 40 and 60 microns.
The dosage of the chemical activator is 0.37-0.49% of the mass of the coal gangue.
Compared with the prior art, the invention has the following advantages: in order to solve the problems of poor performance effect of the whole material and the like caused by the application of the existing coal gangue in the building material, the invention provides the chemical activator for improving the activity of the coal gangue.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.
Example 1
A chemical activator for improving the activity of coal gangue is prepared from the following components in parts by weight: 16 parts of monocalcium phosphate, 90 parts of modified attapulgite, 5.0 parts of copper sulfate, 4.2 parts of potassium sulfate, 1.2 parts of boric acid and 3.4 parts of magnesium sulfate;
the preparation method of the modified attapulgite comprises the following steps: grinding attapulgite to a 35-mesh sieve, adding 1.7 mass percent of perlite powder, uniformly mixing, placing in a crucible, feeding into a muffle furnace, calcining at 370 ℃ for 4 hours, naturally cooling along with the furnace, adding water to prepare slurry with a solid content of 74%, adding 0.11 volume times of aqueous solution of dioctadecyldimethylammonium chloride with a mass concentration of 0.65% into the slurry, stirring at 140 revolutions per minute for 30 minutes, continuing ultrasonic treatment for 10 minutes, then placing in a 60 ℃ water bath, stirring at constant temperature for 1 hour, taking out, transferring into a 80 ℃ constant-temperature drying oven, standing and aging for 20 hours, filtering to obtain a filtrate, placing the filtrate in a 0.34 mass percent sodium bicarbonate solution according to a material-liquid ratio of 1:1.6, soaking for 10 minutes, filtering, and placing in an air flow dryer for dehydration and drying.
The particle size of the perlite powder is between 40 and 60 microns.
The dosage of the chemical activator is 0.37 percent of the mass of the coal gangue.
The chemical activator is processed and prepared according to the method of the embodiment 1, the chemical activator and the coal gangue are doped into cement together, the doping amount of the coal gangue accounts for 40%, the doping amount of the foaming agent hydrogen peroxide accounts for 5.5%, the doping amount of the polypropylene fiber accounts for 0.25%, the doping amount of the water reducing agent accounts for 0.1%, the doping amount of the foam stabilizer accounts for 1.2%, the foaming cement insulation board is prepared according to the water-cement ratio of 0.56, the used cement is ordinary portland cement, the foaming cement insulation board is maintained at 20 ℃ and the relative humidity of 75% after being demoulded, the strength of the foaming cement insulation board is recorded for 7 days and 28 days, and the performance is as: the compressive strength is 0.57MPa in 7 days and 0.85MPa in 28 days, and the die collapse phenomenon is avoided.
Control group: directly doping coal gangue without adding a prepared chemical activator, keeping the balance consistent, and measuring to obtain: the compressive strength is 0.28MPa in 7 days, the compressive strength is 0.41MPa in 28 days, and the die is partially collapsed.
Example 2
A chemical activator for improving the activity of coal gangue is prepared from the following components in parts by weight: 17 parts of monocalcium phosphate, 93 parts of modified attapulgite, 5.5 parts of copper sulfate, 4.4 parts of potassium sulfate, 1.3 parts of boric acid and 3.4 parts of magnesium sulfate;
the preparation method of the modified attapulgite comprises the following steps: grinding attapulgite to pass through a 40-mesh sieve, adding perlite powder with the mass ratio of 1.8%, uniformly mixing, placing in a crucible, sending into a muffle furnace, calcining at 375 ℃ for 4.5 hours, naturally cooling along with the furnace, adding water to prepare slurry with the solid content of 75%, adding 0.12 volume times of aqueous solution of dioctadecyldimethylammonium chloride with the mass concentration of 0.68% into the slurry, stirring at the speed of 145 r/min for 35 minutes, continuing ultrasonic treatment for 12 minutes, then placing in a water bath kettle with the temperature of 65 ℃, stirring at constant temperature for 1.5 hours, taking out, transferring into a constant-temperature drying oven with the temperature of 82 ℃, standing, aging for 22 hours, filtering to obtain a filtrate, placing the filtrate in a sodium bicarbonate solution with the mass concentration of 0.35% according to the mass ratio of 1:1.7, soaking for 12 minutes, filtering, and placing in an airflow dryer for dehydration and drying.
The particle size of the perlite powder is between 40 and 60 microns.
The dosage of the chemical activator is 0.43 percent of the mass of the coal gangue.
The chemical activator is processed and prepared according to the method of the embodiment 2, the chemical activator and the coal gangue are doped into cement together, the doping amount of the coal gangue accounts for 40%, the doping amount of the foaming agent hydrogen peroxide accounts for 5.5%, the doping amount of the polypropylene fiber accounts for 0.25%, the doping amount of the water reducing agent accounts for 0.1%, the doping amount of the foam stabilizer accounts for 1.2%, the foaming cement insulation board is prepared according to the water-cement ratio of 0.56, the used cement is ordinary portland cement, the foaming cement insulation board is maintained at 20 ℃ and the relative humidity of 75% after being demoulded, the strength of the foaming cement insulation board is recorded for 7 days and 28 days, and the performance is as: the compressive strength is 0.59MPa in 7 days and 0.87MPa in 28 days, and the die collapse phenomenon is avoided.
Control group: directly doping coal gangue without adding a prepared chemical activator, keeping the balance consistent, and measuring to obtain: the compressive strength is 0.28MPa in 7 days, the compressive strength is 0.41MPa in 28 days, and the die is partially collapsed.
Example 3
A chemical activator for improving the activity of coal gangue is prepared from the following components in parts by weight: 19 parts of monocalcium phosphate, 95 parts of modified attapulgite, 6.0 parts of copper sulfate, 4.6 parts of potassium sulfate, 1.4 parts of boric acid and 3.8 parts of magnesium sulfate;
the preparation method of the modified attapulgite comprises the following steps: grinding attapulgite to a 45-mesh sieve, adding perlite powder with the mass ratio of 1.9%, uniformly mixing, placing in a crucible, sending into a muffle furnace, calcining at 380 ℃ for 5 hours, naturally cooling along with the furnace, adding water to prepare slurry with the solid content of 77%, adding 0.13-time volume of 0.70% dioctadecyl dimethyl ammonium chloride aqueous solution into the slurry, stirring at the speed of 150 r/min for 40 minutes, continuing ultrasonic treatment for 15 minutes, then placing in a 70 ℃ water bath, stirring at constant temperature for 2 hours, taking out, transferring into a 85 ℃ constant-temperature drying oven, standing and aging for 24 hours, filtering to obtain a filtrate, placing the filtrate in 0.36% sodium bicarbonate solution with the mass concentration of 1:1.8 by mass ratio, soaking for 15 minutes, filtering, and placing in an air flow dryer for dehydration and drying.
The particle size of the perlite powder is between 40 and 60 microns.
The dosage of the chemical activator is 0.49 percent of the mass of the coal gangue.
The chemical activator is processed and prepared according to the method of the embodiment 3, the chemical activator and the coal gangue are doped into cement together, the doping amount of the coal gangue accounts for 40%, the doping amount of the foaming agent hydrogen peroxide accounts for 5.5%, the doping amount of the polypropylene fiber accounts for 0.25%, the doping amount of the water reducing agent accounts for 0.1%, the doping amount of the foam stabilizer accounts for 1.2%, the foaming cement insulation board is prepared according to the water-cement ratio of 0.56, the used cement is ordinary portland cement, the foaming cement insulation board is maintained at 20 ℃ and the relative humidity of 75% after being demoulded, the strength of the foaming cement insulation board is recorded for 7 days and 28 days, and the performance is as: the compressive strength is 0.58MPa in 7 days and 0.85MPa in 28 days, and the die collapse phenomenon is avoided.
Control group: directly doping coal gangue without adding a prepared chemical activator, keeping the balance consistent, and measuring to obtain: the compressive strength is 0.28MPa in 7 days, the compressive strength is 0.41MPa in 28 days, and the die is partially collapsed.
Claims (5)
1. A chemical activator for improving the activity of coal gangue is characterized by being prepared from the following components in parts by weight: 16-19 parts of monocalcium phosphate, 90-95 parts of modified attapulgite, 5.0-6.0 parts of copper sulfate, 4.2-4.6 parts of potassium sulfate, 1.2-1.4 parts of boric acid and 3.4-3.8 parts of magnesium sulfate;
the preparation method of the modified attapulgite comprises the following steps: grinding attapulgite until the attapulgite is sieved by a sieve of 35-45 meshes, adding perlite powder with the mass ratio of 1.7-1.9 percent, uniformly mixing, placing the mixture into a crucible, sending the mixture into a muffle furnace, calcining the mixture for 4-5 hours at the temperature of 370 plus materials and 380 ℃, naturally cooling the mixture along with the furnace, adding water to prepare slurry with the solid content of 74-77 percent, adding 0.11-0.13 volume times of dioctadecyl dimethyl ammonium chloride aqueous solution into the slurry, stirring the slurry for 30-40 minutes at the speed of 140 plus materials and 150 rpm, continuing ultrasonic treatment for 10-15 minutes, then placing the slurry into a water bath kettle with the temperature of 60-70 ℃, stirring the slurry for 1-2 hours at constant temperature, taking out the slurry, transferring the slurry into a constant temperature drying box with the temperature of 80-85 ℃, aging the slurry for 20-24 hours, filtering the slurry to obtain a filter, placing the filter into a sodium bicarbonate solution for soaking for 10-15 minutes according to the mass ratio of 1:1.6, filtering, and dehydrating and drying in an air flow dryer.
2. The chemical activator for improving the activity of the coal gangue as claimed in claim 1, wherein the perlite powder has a particle size of 40-60 microns.
3. The chemical activator for improving the activity of the coal gangue as claimed in claim 1, wherein the mass concentration of the aqueous solution of dioctadecyldimethylammonium chloride is 0.65-0.70%.
4. The chemical activator for improving the activity of the coal gangue as claimed in claim 1, wherein the mass concentration of the sodium bicarbonate solution is 0.34-0.36%.
5. The chemical activator for improving the activity of the coal gangue as claimed in claim 1, wherein the dosage of the chemical activator is 0.37-0.49% of the mass of the coal gangue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420457.XA CN112358214A (en) | 2020-12-08 | 2020-12-08 | Chemical activator for improving activity of coal gangue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011420457.XA CN112358214A (en) | 2020-12-08 | 2020-12-08 | Chemical activator for improving activity of coal gangue |
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| Publication Number | Publication Date |
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| CN112358214A true CN112358214A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011420457.XA Withdrawn CN112358214A (en) | 2020-12-08 | 2020-12-08 | Chemical activator for improving activity of coal gangue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105798A (en) * | 2021-03-21 | 2021-07-13 | 吾尚良品环境服务(上海)有限公司 | Preparation method of surface curing agent for stone curing |
-
2020
- 2020-12-08 CN CN202011420457.XA patent/CN112358214A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113105798A (en) * | 2021-03-21 | 2021-07-13 | 吾尚良品环境服务(上海)有限公司 | Preparation method of surface curing agent for stone curing |
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Application publication date: 20210212 |
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