CN115806803B - Moisture-keeping dust suppressant for mine ore transportation road and preparation method thereof - Google Patents
Moisture-keeping dust suppressant for mine ore transportation road and preparation method thereof Download PDFInfo
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- 239000000428 dust Substances 0.000 title claims abstract description 97
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 51
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 30
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 30
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 30
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 27
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 27
- 229920000578 graft copolymer Polymers 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 25
- 230000001629 suppression Effects 0.000 claims abstract description 23
- 239000011268 mixed slurry Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 19
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 15
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 239000003999 initiator Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000007334 copolymerization reaction Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 9
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 9
- 239000011591 potassium Substances 0.000 claims description 9
- 229910052700 potassium Inorganic materials 0.000 claims description 9
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
- 239000004289 sodium hydrogen sulphite Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012264 purified product Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
The invention discloses a moisture-preserving dust suppressant for mine ore transportation roads and a preparation method thereof, wherein the moisture-preserving dust suppressant comprises the following raw materials in parts by weight: 3-9 parts of sodium carboxymethyl cellulose, 4-12 parts of acrylamide, 1-3 parts of polyvinyl alcohol, 5-17 parts of glycerol, 0.6-1 part of sodium lignin sulfonate, 0.02-0.08 part of cross-linking agent, 0.04-0.15 part of initiator and 80-240 parts of water; the preparation method of the moisture-preserving dust suppressant comprises the following steps: s1: mixing sodium carboxymethylcellulose and polyvinyl alcohol, adding into water, and heating and mixing in a stirring state to obtain uniformly mixed slurry; s2: adding acrylamide, a cross-linking agent and an initiator into the mixed slurry of the S1 to react, so as to obtain a graft copolymer; s3: and (3) adding glycerol and sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant. The invention improves the synthesis efficiency of the moisture-preserving dust suppressant, and the moisture-preserving dust suppressant has good film forming performance, thereby having better and longer lasting dust suppression effect.
Description
Technical Field
The invention relates to the technical field of road dust suppression, in particular to a moisture-preserving dust suppressant for mine ore transportation roads and a preparation method thereof.
Background
In order to meet the increasing production demands of cement mines, the transportation work of ores after blasting operation is more frequent, dust which is shaken off in the transportation process and dust taken by mine cars from mines and secondary dust generated in the process that original dust on the transportation way of the mine cars also can fly to the surrounding environment, and harm is caused to the physical health of on-site workers, so that the problem of dust on the mine transportation road is solved, and the problems of the mine construction and the key problems on the mineral resource management and the mining development road under new situation are solved.
In order to effectively prevent dust diffusion, an effective dust suppression means is required, and three ways are mainly adopted for the existing dust method, namely, the dust suppression process of blasting operation and mining equipment are optimized and improved from the source of dust production, so that the generation of dust is reduced; dust suppression treatment is carried out on the mine car loading raw material site, so that dust falling in mine car transportation is reduced; the ore transportation road is subjected to dust suppression treatment, so that the aim of suppressing secondary dust emission is fulfilled. However, the process and equipment optimization and improvement cost is too high, and the time is too long; the raw material loading treatment cannot effectively inhibit the secondary dust emission phenomenon generated in the process of running the mine car on the ore transportation path; only from the ore transportation to the road, the generation of dust generated when the mine car runs on the ore transportation road is reduced or inhibited, and the effective dust suppression can be really realized.
The current methods adopted at home and abroad in the road dust suppression field comprise methods of sprinkling water, dust suppression, chemical dust suppression, biological dust suppression, tarpaulin covering and the like. Firstly, although the water spraying and dust suppression have the advantages of low cost and convenience, the water evaporation speed is high, the bonding force on dust is insufficient, the effective dust suppression time is short, the water resource waste is serious, and the environment-friendly concept of protecting water resources in the current green mine construction is not met; the biological dust suppression cost is higher, and the cohesiveness is poorer; the chemical dust suppression adopts chemical reagents to achieve the aim of dust suppression, generally causes pollution to the environment, damages equipment, and simultaneously is not easy to degrade and pollute the environment, and causes harm to surrounding vegetation and the health of on-site working people. In view of the foregoing, there is a strong need for an environment-friendly dust suppressant with certain moisture retention, which is nontoxic, harmless and pollution-free, for road dust suppression, so as to solve the above problems.
Disclosure of Invention
Based on the technical problems in the background technology, the invention provides the moisture-preserving dust suppressant for the mine transportation road and the preparation method thereof, the synthesis efficiency of the moisture-preserving dust suppressant is improved, and the moisture-preserving dust suppressant has good film forming performance, so that the moisture-preserving dust suppressant has better and more durable dust suppressing effect.
The invention provides a moisture-keeping dust suppressant for mine ore transportation roads, which comprises the following raw materials in parts by weight: 3-9 parts of sodium carboxymethyl cellulose, 4-12 parts of acrylamide, 1-3 parts of polyvinyl alcohol, 5-17 parts of glycerol, 0.6-1 part of sodium lignin sulfonate, 0.02-0.08 part of cross-linking agent, 0.04-0.15 part of initiator and 80-240 parts of water.
Preferably, the crosslinking agent is N-N methylene bisacrylamide.
Preferably, the initiator is potassium persulfate-sodium bisulfite.
Preferably, the mass ratio of the sodium bisulphite to the potassium persulfate is 1:2-4.
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road provided by the invention comprises the following steps:
s1: mixing sodium carboxymethylcellulose and polyvinyl alcohol, adding into water, and heating and mixing in a stirring state to obtain uniformly mixed slurry;
s2: adding acrylamide, a cross-linking agent and an initiator into the mixed slurry of the S1 to react, so as to obtain a graft copolymer;
s3: and (3) adding glycerol and sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
Preferably, the temperature of the temperature rise in S1 is 95-105 ℃.
Preferably, the temperature of the graft copolymerization reaction in S2 is 60-70℃for 5-6 hours.
The beneficial technical effects of the invention are as follows:
(1) The invention firstly heats and mixes sodium carboxymethyl cellulose and polyvinyl alcohol when preparing the dust suppressant, then adds other raw materials to react, and compared with the existing preparation method, the invention has higher content of active ingredients, namely improves the synthesis efficiency of the dust suppressant, and the added polyvinyl alcohol does not influence the graft copolymerization of sodium carboxymethyl cellulose and acrylamide.
(2) The dust suppressant contains polyvinyl alcohol and glycerol, and has the mutual synergistic effect on improving the film forming performance of the dust suppressant, so that the film forming performance of the dust suppressant is obviously improved, and the dust suppressant has better and longer-lasting dust suppressing effect.
Drawings
Fig. 1 is an infrared scanning spectrum chart proposed by the present invention.
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Example 1
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethyl cellulose and 2g of polyvinyl alcohol into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until the polyvinyl alcohol is fully dissolved, the sodium carboxymethyl cellulose is fully swelled and has no caking, and calculating the dissolution amount of the sodium carboxymethyl cellulose to be 9.6g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 65 ℃, then 12g of acrylamide, 0.041g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0372 g of sodium bisulfate and 0.0973g of potassium persulfate) are added for graft copolymerization at 65 ℃ for 6.5 hours to obtain a graft copolymer;
s3: 12g of glycerol and 1.5g of sodium lignin sulfonate are added into the graft copolymer of S2, and the moisture-preserving dust suppressant is prepared after uniform mixing.
Example 2
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethyl cellulose and 2g of polyvinyl alcohol into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 98 ℃, stirring until the polyvinyl alcohol is fully dissolved, the sodium carboxymethyl cellulose is fully swelled and free of caking, and calculating the dissolving amount of the sodium carboxymethyl cellulose to be 8.9g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 60 ℃, 10g of acrylamide, 0.032g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (sodium bisulfate 0.0313g, potassium persulfate 0.0747 g) are added for graft copolymerization at 60 ℃ for 5 hours to obtain a graft copolymer;
s3: and (3) adding 9g of glycerol and 1g of sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
Example 3
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethyl cellulose and 3g of polyvinyl alcohol into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until the polyvinyl alcohol is fully dissolved, the sodium carboxymethyl cellulose is fully swelled and has no caking, and calculating the dissolution amount of the sodium carboxymethyl cellulose to be 9.8g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 70 ℃, 15g of acrylamide, 0.056g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0538 g of sodium bisulfate and 0.1379g of potassium persulfate) are added for graft copolymerization at 70 ℃ for 6 hours to obtain a graft copolymer;
s3: 25g of glycerol and 3g of sodium lignin sulfonate are added into the graft copolymer of S2, and the moisture-preserving dust suppressant is prepared after uniform mixing.
Comparative example 1
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethylcellulose into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until sodium carboxymethylcellulose is fully swelled and has no caking, and calculating the dissolution amount of sodium carboxymethylcellulose to be 6.3g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 65 ℃, then 12g of acrylamide, 0.041g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0372 g of sodium bisulfate and 0.0973g of potassium persulfate) are added for graft copolymerization at 65 ℃ for 6.5 hours to obtain a graft copolymer;
s3: 12g of glycerol, 1.5g of sodium lignin sulfonate and 2g of polyvinyl alcohol are added into the graft copolymer of S2, and the moisture-preserving dust suppressant is prepared after uniform mixing. Wherein 2g of polyvinyl alcohol is dissolved in water at 95℃and the polyvinyl alcohol solution is mixed with the graft copolymer after cooling.
Comparative example 2
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethyl cellulose and 2g of polyvinyl alcohol into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until the polyvinyl alcohol is fully dissolved, the sodium carboxymethyl cellulose is fully swelled and has no caking, and calculating the dissolution amount of the sodium carboxymethyl cellulose to be 9.5g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 65 ℃, then 12g of acrylamide, 0.041g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0372 g of sodium bisulfate and 0.0973g of potassium persulfate) are added for graft copolymerization at 65 ℃ for 6.5 hours to obtain a graft copolymer;
s3: and (3) adding 1.5g of sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
Comparative example 3
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethylcellulose into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until sodium carboxymethylcellulose is fully swelled and has no caking, and calculating the dissolution amount of sodium carboxymethylcellulose to be 6.1g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 65 ℃, then 12g of acrylamide, 0.041g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0372 g of sodium bisulfate and 0.0973g of potassium persulfate) are added for graft copolymerization at 65 ℃ for 6.5 hours to obtain a graft copolymer;
s3: and (3) adding 1.5g of sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
Comparative example 4
The preparation method of the moisture-preserving dust suppressant for the mine ore transportation road comprises the following steps:
s1: adding sodium carboxymethylcellulose into 160mL of water under stirring, then keeping stirring at a constant speed, heating to 95 ℃, stirring until sodium carboxymethylcellulose is fully swelled and has no caking, and calculating the dissolution amount of sodium carboxymethylcellulose to be 5.8g to obtain uniformly mixed slurry;
s2: the mixed slurry of S1 is cooled to 65 ℃, then 12g of acrylamide, 0.041g of N-N methylene bisacrylamide solution and potassium persulfate-sodium bisulfate solution (0.0372 g of sodium bisulfate and 0.0973g of potassium persulfate) are added for graft copolymerization at 65 ℃ for 6.5 hours to obtain a graft copolymer;
s3: 12g of glycerol and 1.5g of sodium lignin sulfonate are added into the graft copolymer of S2, and the moisture-preserving dust suppressant is prepared after uniform mixing.
The graft copolymer prepared in example 1 was purified and then subjected to infrared spectroscopic examination, and the results are shown in FIG. 1.
Analysis of profile c for the purified graft copolymer product with reference to profiles a, b for PVA and CMC showed that: 1022cm -1 The absorption peak of beta- (1, 4) -di-glycoside bond of CMC-Na is 1394cm -1 The process comprises purifying-CH, -CH in the grafted product 2 Is 1620cm -1 Is characterized by the absorption peaks in CMC-Na and AM, 2910cm -1 at-CH 2 Is 3169cm -1 The structure of the dust suppressant containing chain unit of AM and CMC-Na is shown by the infrared spectrum analysis, which shows that the AM has been successfully grafted into CMC-Na. c, no O-H stretching vibration absorption peak of the corresponding PVA at 3278 exists, because the PVA does not participate in the reaction, only plays a role of assisting film forming, and is removed in the purification process of the graft copolymerization product.
The products prepared in example 1 and comparative examples 1 to 4 were measured for the effective dust suppressing component solids content and film forming properties (tensile strength), and the results are shown in Table 1. Wherein:
the detection method for the solid content of the effective dust suppression component comprises the following steps: washing the graft copolymer product with absolute ethanol to obtain white flocculent precipitate, and washing the ethanol with warm water. And (3) placing the precipitate in a constant-temperature drying oven, drying to constant weight, crushing, extracting with a Soxhlet extractor for 15h by using acetone as a solvent, washing off the acetone, drying to constant weight to obtain a purified product, and weighing.
The tensile strength detection method comprises the following steps: and removing bubbles from the prepared dust suppressant solution by ultrasonic, pouring the solution into a polytetrafluoroethylene plate, and placing the polytetrafluoroethylene plate in a vacuum drying oven at 35 ℃ for drying after the polytetrafluoroethylene plate is fully cast and distributed, and keeping certain humidity. The smooth and flat adhesive film is cut into 10mm multiplied by 50mm sample bars, and the sample bars are detected by a film breaking elongation tester.
TABLE 1 detection results
| Group of | Effective dust suppression component solids content (%) | Elongation at break (%) |
| Example 1 | 8.21 | 117.3 |
| Comparative example 1 | 5.08 | 98.6 |
| Comparative example 2 | 8.15 | 85.7 |
| Comparative example 3 | 4.96 | 49.4 |
| Comparative example 4 | 5.12 | 60.2 |
As can be seen from the test results of example 1 in Table 1, the moisture-keeping dust suppressant prepared by the present invention has high content of effective dust suppressing component and high elongation at break of the film, thereby having better and longer lasting dust suppressing effect. In addition, as can be seen from the results of the embodiment 1 and the comparative example 1, compared with the existing preparation process of the dust suppressant, the preparation method of the invention can remarkably improve the content of the effective dust suppression component of the moisture-preserving dust suppressant, thereby improving the dust suppression effect of the moisture-preserving dust suppressant; as can be seen from the test results of comparative examples 3 and 4, in the absence of polyvinyl alcohol, the added glycerol mainly plays a role in conventional auxiliary film formation and moisture retention, and the degree of improvement of the tensile properties of the film is limited (the elongation at break is increased from 49.4% to 60.2%) by the independent addition of glycerol; the results of the embodiment 1 and the comparative example 2 show that the added glycerol not only can play a role in conventional auxiliary film forming and moisture preservation in the presence of the polyvinyl alcohol, but also can obviously improve the tensile strength of the film (the breaking elongation is improved to 117.3 percent from 85.7 percent), thereby proving that the added polyvinyl alcohol and the glycerol have a certain synergistic effect in improving the tensile strength of the film, so that the prepared moisture-preserving dust suppressant has better film forming performance and better and longer lasting dust suppression effect.
Claims (8)
1. The mine ore transportation road moisture-keeping dust suppressant is characterized by comprising the following raw materials in parts by weight: 3-9 parts of sodium carboxymethyl cellulose, 4-12 parts of acrylamide, 1-3 parts of polyvinyl alcohol, 5-17 parts of glycerol, 0.6-1 part of sodium lignin sulfonate, 0.02-0.08 part of cross-linking agent, 0.04-0.15 part of initiator and 80-240 parts of water;
the preparation method of the moisture-keeping dust suppressant for the mine ore transportation road comprises the following steps:
s1: mixing sodium carboxymethylcellulose and polyvinyl alcohol, adding into water, and heating and mixing in a stirring state to obtain uniformly mixed slurry;
s2: adding acrylamide, a cross-linking agent and an initiator into the mixed slurry of the S1 to react, so as to obtain a graft copolymer;
s3: and (3) adding glycerol and sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
2. The mine haul road moisture and dust suppressant of claim 1, wherein the cross-linking agent is N-N methylene bisacrylamide.
3. The mine haul road moisture and dust suppressant of claim 1, wherein the initiator is potassium persulfate-sodium bisulfite.
4. The mine haul road moisture and dust suppressant of claim 3, wherein the mass ratio of sodium bisulphite to potassium persulfate is 1:2-4.
5. A method for preparing the moisture-preserving dust suppressant for mine ore transportation roads according to any one of claims 1 to 4, which comprises the following steps:
s1: mixing sodium carboxymethylcellulose and polyvinyl alcohol, adding into water, and heating and mixing in a stirring state to obtain uniformly mixed slurry;
s2: adding acrylamide, a cross-linking agent and an initiator into the mixed slurry of the S1 to react, so as to obtain a graft copolymer;
s3: and (3) adding glycerol and sodium lignin sulfonate into the graft copolymer of the S2, and uniformly mixing to obtain the moisture-preserving dust suppressant.
6. The method for producing a moisture-retaining dust suppressant for mine transportation roads according to claim 5, wherein the temperature of the rise in S1 is 95 to 105 ℃.
7. The method for preparing the moisture-preserving dust suppressant for mine transportation roads according to claim 5, wherein the temperature of the graft copolymerization reaction in S2 is 60-70 ℃ for 5-6 hours.
8. Use of the mine ore-carrying road moisture-retention dust suppressant according to any one of claims 1-4 in cement mine road dust suppression.
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| WO2018176713A1 (en) * | 2017-03-27 | 2018-10-04 | 日东（青岛）研究院有限公司 | Environmentally friendly efficient dust suppression agent, preparation method therefor and use thereof |
| CN110628386A (en) * | 2019-11-01 | 2019-12-31 | 万宝矿产有限公司 | Composite moisturizing dust suppressant and preparation method thereof |
| CN113088260A (en) * | 2020-12-31 | 2021-07-09 | 青岛睿鸿鑫环保科技有限公司 | Efficient environment-friendly degradable dust suppressant with quick sterilization effect and preparation method thereof |
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