CN101270247B - Water-proof emulsion for coal pile in the open air - Google Patents
Water-proof emulsion for coal pile in the open air Download PDFInfo
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- CN101270247B CN101270247B CN200710038384A CN200710038384A CN101270247B CN 101270247 B CN101270247 B CN 101270247B CN 200710038384 A CN200710038384 A CN 200710038384A CN 200710038384 A CN200710038384 A CN 200710038384A CN 101270247 B CN101270247 B CN 101270247B
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Abstract
The invention discloses waterproof latex applied to open-pit coal heap, which is prepared by taking styrene-acrylic emulsion and elastic acrylic emulsion as base materials for emulsion polymerization, and adding in filler, water and functional aids. The materials and the weight proportion are as below: the styrene-acrylic emulsion and the elastic acrylic emulsion base materials: 35 to 45, wherein, the blending ratio of the styrene-acrylic emulsion and the elastic acrylic emulsion: 4: 6 to 6: 4; wetting agent:0.25 to 0.30; dispersant: 0.30 to 0.40; defoamer: 0.20 to 0.30; antifreezer: 1.1 to 1.3; film-forming additive: 3 to 5; hydrophobic agent: 0.5 to 1.5; short fiber: 0.05 to 0.1; filler: 0.5 to 2.0; water: 45 to 60; thickener: 2.0 to 3.0. The waterproof latex can reduce the penetration of external water into the coal heap, reduce water in the coal, reduce energy consumption, improve output and stabilize the production to the next procedure, and meanwhile, inhibit dust.
Description
Technical field
The invention belongs to the waterproof paint technical field, be specifically related to a kind of water-proof emulsion that is applied to large-scale open-air dump.
Background technology
Industrial large-sized dump is owing to air storage, and the rainwash infiltration is inevitable, adds in order to control coal dust and flies upward the artificial water spray measure of taking, and the moisture of raw coal is significantly increased.At present coking coal moisture is on average about 10%, during rainy season then up to 13%-15%.Stipulate according to the coking technology rules: the every increase by 1% of coking coal moisture, the about 29-33kJ/kg of the corresponding increase of coking thermal losses for capacity coke oven, can increase about 62kJ/kg.And the increase of moisture makes corresponding increase of coking time 20-30 minute in the raw coal, and the prolongation of coking time has not only increased the coking energy consumption, and has reduced production efficiency.Therefore, cause the raising of enterprise's production cost and the waste of the energy.Simultaneously, the moisture fluctuation has brought bigger influence for user's production stable smooth operation.But consult various data, basic at present relevant waterproof product and the relevant report that does not have at open-air dump.
In recent years, it is more to be devoted to study the product that reduces the dump dust from flying, as chemical dust-inhibitors such as polyvinyl acetate liquid, N81620.This series products airborne dust effect is better, but water resistance is not good, can not effectively stop the infiltration of outside rainwater to dump.
Traditional waterproof paint kind is a lot, is mainly used in aspects such as building, is not applied to the waterproof paint of dump.Waterproof paint generally is to be main film forming substance by pitch, synthesising macromolecule copolymer, synthesising macromolecule copolymer and pitch, synthetic macromolecule and cement or with inorganic composite materials etc., mix solvent-borne type, water-latex type or response type that an amount of pigment, auxiliary agent, solvent etc. are processed into, do not have the matrix material of the pbz polymer synthetic materials of the liquid or liquable pressed powder state of the sticky shape of solid shape at normal temperatures.Large-scale open-air dump does not have even curface, because coal particle is big and shape is different, the bulk particulate coal tumbles the dump bottom, make dump form the surface of inclination, and the dump surface that tilts is irregular, having a lot of holes, is not all right so common building water-proof paint is applied on the dump.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of novel water-proof emulsion that is applied to open-air dump, this water-proof emulsion can reduce the infiltration to dump such as outside moisture such as rainwater and artificial water spray, thereby reduction moisture content of coal, effect to later process such as coking production are played energy efficient, improved production capacity and stably manufactured can also take into account the effect that suppresses airborne dust simultaneously.
Technical scheme of the present invention is as follows:
A kind of open-air dump water-proof emulsion, it be with benzene emulsion and elastomeric propylene yogurt liquid as the letex polymerization base-material, add that filler, water and functional aid make, material that it is used and weight proportion are:
The elastomeric propylene yogurt liquid base material 35-45 of the benzene emulsion of solid content 48 ± 2% and solid content 50 ± 2%, wherein, the blending ratio of benzene emulsion and elastomeric propylene yogurt liquid is 4: 6～6: 4;
Wetting agent DP-18 0.25-0.30; Dispersion agent DP-511 0.30-0.40;
Defoamer R201 0.20-0.30; Antifreeze glycol 1.1-1.3;
Film coalescence aid Texanol or propylene glycol 3-5; Hydrophober Fan Kete TL type 0.5-1.5;
Staple fibre 0.05-0.1; Filler 0.5-2.0;
Water 45-60; Thickening material RHA 2.0-3.0.
The preferable weight proportion of the used material of above-mentioned water-proof emulsion is:
Benzene emulsion and elastomeric propylene yogurt liquid base material 39, wherein the blending ratio of benzene emulsion and elastomeric propylene yogurt liquid is 6: 4; Wetting agent 0.25; Dispersion agent 0.30; Defoamer 0.25; Frostproofer 1.25; Film coalescence aid 4.0; Hydrophober 1.0; Staple fibre 0.05; Filler 1.2; Water 50; Thickening material 2.7.
Key of the present invention is the special applications at large-scale open-air dump, determines the kind of water-proof emulsion base-material and functional aid, and by various tests and effect comparison, finally determines the proportioning of each component, formulates the rational technological process of production simultaneously.
Determining of the selection of base-material and composition thereof:
By repeatedly repeatedly and simultaneous test, from the validity and the economy of product, finally select benzene emulsion (hard emulsion) and elastomeric propylene yogurt liquid (soft emulsion) blend, preparation water-proof emulsion best results as base-material.The performance of benzene emulsion and elastomeric propylene yogurt liquid sees Table 1.
Table 1 emulsion the key technical indexes
For determining suitable blending ratio, the present invention has carried out 7 parallel tests, each test is taked on the initial formulation basis, it is constant to fix other auxiliary agent (as dispersion agent, wetting agent, defoamer, film coalescence aid etc.) addition, blend proportioning according to different benzene emulsions and elastomeric propylene yogurt liquid is carried out, and measures the latex performance then and is analyzed.The physical function parameter of the latex that records under the test situation of benzene emulsion and elastomeric propylene yogurt liquid different mixture ratio sees Table 2.
The different mixture of table 2 benzene emulsion and elastomeric propylene yogurt liquid is than the physicals of latex under the situation
By the performance of different mixture than the water-proof emulsion that makes under the situation detected, find that its thermotolerance and water tolerance are good, but surface drying time differs.Surface drying time depends primarily on the minimum film-forming temperature, the particularly add-on of elastomeric propylene yogurt liquid of main film forming substance emulsion in the add-on of film coalescence aid in the latex and the latex.Elastomeric propylene yogurt liquid belongs to soft emulsion, minimum film-forming temperature lower (20 ℃), but in temperature range very widely just fast filming, the add-on of elastomeric propylene yogurt liquid is big more, the surface drying time of the water-proof emulsion that blend makes is short more.If the surface drying time of water-proof emulsion is too short, then be unfavorable for forming complete film on the dump surface, some place might occur and not be sprayed onto as yet, and the dried phenomenon of some local water-proof emulsion, it is imperfect, discontinuous to be easy to make water-proof emulsion like this.If the surface drying time of water-proof emulsion is long also unfavorable, because actual dump grain diameter differs, there are a lot of holes the centre, and water-proof emulsion has certain fluidity, will cause a large amount of latex seepages like this, makes the latex consumption increase.Therefore, consider from surface drying time and cost angle, determine finally that the blending ratio of benzene emulsion and elastomeric propylene yogurt liquid is about 4: 6～between 6: 4, the best is 6: 4.
Except base-material, the selection of various functional aids and ratio are also very important.Be sprayed directly on open-air dump use and form one deck waterproof membrane for water-proof emulsion of the present invention can easily be gushed out from nozzle swimmingly, need to add wetting agent, dispersion agent, film coalescence aid, defoamer, hydrophober, thickening material, water and filler in the prescription to play good waterproof effect; For this water-proof emulsion can be adsorbed on the dump surface with a lot of holes securely, added staple fibre in the prescription; For this water-proof emulsion also can be used in winter, added frostproofer in the prescription.
Above-mentioned physique filler can be selected wherein one or more such as wollastonite powder, kaolin, lime carbonate, talcum powder.Wetting dispersing agent can be divided into ionic and non-ionic type, and wetting agent DP-18 that produces as the chemical company limited of moral modest (Shanghai) and dispersion agent DP-511 etc. all can select for use.Thickening material can be selected alkali swelling type thickening material for use, the thickening material RHA that produces as Shanghai China friendly science and trade Industrial Co., Ltd. etc.The optional defoamer R201 that uses the production of Shanghai China friendly science and trade Industrial Co., Ltd. of defoamer etc.Film coalescence aid can be selected Texanol (alcohol ester-12), ethylene glycol ethyl ether, propylene glycol etc. for use.The optional spent glycol of frostproofer etc.Hydrophober can be selected the Fan Kete TL type hydrophober of Suzhou Research Inst. of Architecture Science's production etc. for use.Staple fibre can be selected polyster fibre etc. for use.
The production technique of water-proof emulsion of the present invention following (process flow sheet is seen Fig. 1):
(1) water, wetting agent, dispersion agent, defoamer, staple fibre, frostproofer etc. are added in the stirred pot, stir at a slow speed;
(2) slowly add filler;
(3) high speed dispersion stirs 30min;
(4) under stirring condition at a slow speed, add letex polymerization base-material, film coalescence aid, hydrophober etc., continue to stir 30min;
(5) waiting to stir afterwards, adding thickening material, pH regulator agent improve system viscosity.
Beneficial effect of the present invention is as follows:
The present invention is a kind of novel water-proof emulsion that is applied to open-air dump, its water-repellancy is good, can be sprayed directly on easily on the open-air dump and use, summer can be heat-resisting, winter can be antifreeze, can effectively reduce the infiltration of outside rainwater to dump, thereby reduce moisture content of coal, later process such as coking and blast furnace production are played energy efficient, improved the purpose of production capacity and stably manufactured, can also take into account the effect that coal dust flies upward that suppresses simultaneously.This latex is better to the water resistance of dump, and environmental pollution is very little, belongs to the environmental type water-proof emulsion.
The present invention reduces the later process energy consumption to reducing the intrusion of the external moisture of open-air dump, improves production stability and all can produce positively effect, can be widely used in enterprises such as Steel Plant, coke-oven plant, Coal Stack Yard, harbour, has good popularizing application prospect.
Description of drawings
Fig. 1 is a water-proof emulsion preparation process synoptic diagram of the present invention.
Embodiment
The invention will be further described below by embodiment and application test example.
Embodiment:
Select for use different ingredients to make 1-4# water-proof emulsion of the present invention (being embodiment 1-4) by the following method respectively:
(1) adopts the high speed dispersor method, water, wetting agent, dispersion agent, defoamer, staple fibre, frostproofer and a spot of thickening material are added in the stirred pot, under the speed of 400-500rpm, stir at a slow speed;
(2) slowly add filler,, then press the ascending adding of oil number size of filler if any several fillers.Soon, extender paste is thickening gradually behind the adding filler, suitably regulates a dispersion impeller and barrel end distance this moment, makes whirlpool become shallow pot shape;
(3) treat after filler adds stirring velocity to be brought up to 1500rpm, high speed dispersion stirs 30-60min.For preventing that temperature from rising too high, can when the extender paste homodisperse, be decreased to 400rpm to stirring velocity according to practical situation water flowing condensation;
(4) under stirring condition at a slow speed, gradual slow adds letex polymerization base-material, film coalescence aid, hydrophober, and continues to stir 30-60min;
(5) back of waiting to stir adds thickening material, and by adjusting pH value with the raising system viscosity.
The prescription of 1-4# water-proof emulsion sees Table 3.
The salient features test result of 1-4# water-proof emulsion sees Table 4.
Table 4 1-4# water-proof emulsion The performance test results
In addition, above-mentioned 1-4# water-proof emulsion water resistance and resistance toheat experiment have been carried out.
The 1-4# water-proof emulsion is placed on soaks 24h in the water, take out and observe that water-proof emulsion does not all have foaming, elephant skin, phenomenon such as come off, consistent with dry film; The back water droplet that drips all presents the water-repellent layer of similar lotus leaf on water-proof emulsion.Illustrate that 1-4# water-proof emulsion water tolerance is good.
The 1-4# water-proof emulsion is placed in the 40-70 ℃ of temperature range, observes the thermotolerance of water-proof emulsion and vary with temperature situation, find that water-proof emulsion does not have phenomenons such as aliquation, bubbling, cracking.Illustrate that 1-4# water-proof emulsion thermotolerance is good.
The application test example:
Use water-proof emulsion product of the present invention and carried out three groups of commerical tests at the open-air coal yard of Baosteel, respectively choose 2 high 8m at the CE coal yard at every turn in mid-December, 2005, diameter 20m, the big dump that weight is 760 tons is simulated the rainy parallel test of carrying out with the water barrow sprinkling.The sampling spot of each dump is that two layers of all directions different directions are total to 8-10 point up and down, and sampling depth is 0.5m.Testing sequence is as follows: choose two parallel dumps that unload from same ship, sampling and measuring moisture; A pile is sprayed water-proof emulsion, and another heap does not spray; After treating the latex surface drying, simulated rainfall is sprayed water; Resampling is measured the moisture comparative analysis.
Test example 1: the Specifeca tion speeification of test latex sees Table 5, and the moisture content of coal data situation sees Table 6 before and after the test.
The performance of table 5 test example 1 used waterproof dust suppression latex
Table 6 test example 1 moisture content of coal correlation data
After simulation was rained, not spraying water-proof emulsion dump moisture increased: 8.7%-8.36%=0.34%
After simulation was rained, spraying water-proof emulsion dump moisture increased: 8.4%-8.36%=0.04%
The waterproof rate of water-proof emulsion is: (0.34%-0.04%)/and 0.34%*100%=88%
Test example 2: the Specifeca tion speeification of test latex sees Table 7.
The performance of table 7 test example 2 used waterproof dust suppression latexes
Moisture average out to 9.2% before the test, not spraying heap after the test is 9.83%, spraying heap is 9.35%.That is:
After simulation was rained, not spraying water-proof emulsion dump moisture increased: 9.83%-9.2%=0.63%
After simulation was rained, spraying water-proof emulsion dump moisture increased: 9.35%-9.2%=0.15%
The waterproof rate of water-proof emulsion is: (0.63%-0.15%)/and 0.63%*100%=76%
Test example 3: the Specifeca tion speeification of test latex sees Table 8.
The performance of table 8 test example 3 used waterproof dust suppression latexes
Moisture average out to 8.85% before the test, not spraying heap after the test is 9.72%, spraying heap is 9.02%.That is:
After simulation was rained, not spraying water-proof emulsion dump moisture increased: 9.72%-8.85%=0.87%
After simulation was rained, spraying water-proof emulsion dump moisture increased: 9.02%-8.85%=0.17%
The waterproof rate of water-proof emulsion is: (0.87%-0.17%)/and 0.87%*100%=80%
Above application test result shows: the waterproof effect that water-proof emulsion of the present invention is applied on the open-air dump is apparent in view.This water-proof emulsion can be sprayed directly on the large-scale open-air dump and use, and forms one deck waterproofing protection film on the surface of dump, has reduced the intrusion of external moisture thus.After spraying once this water-proof emulsion on the large-scale open-air dump, waterproof effect can be kept more than three weeks approximately, therefore, needs as actual situation, can spray several times more.
Claims (4)
1. an open-air dump water-proof emulsion is characterized in that, it be with benzene emulsion and elastomeric propylene yogurt liquid as the letex polymerization base-material, add that filler, water and functional aid make, material that it is used and weight proportion are:
The elastomeric propylene yogurt liquid base material 35-45 of the benzene emulsion of solid content 48 ± 2% and solid content 50 ± 2%, wherein, the blending ratio of benzene emulsion and elastomeric propylene yogurt liquid is 4: 6～6: 4;
Wetting agent DP-180.25-0.30; Dispersion agent DP-511 0.30-0.40;
Defoamer R201 0.20-0.30; Antifreeze glycol 1.1-1.3;
Film coalescence aid Texanol or propylene glycol 3-5; Hydrophober Fan Kete TL type 0.5-1.5;
Staple fibre 0.05-0.1; Filler 0.5-2.0;
Water 45-60; Thickening material RHA 2.0-3.0.
2. open-air dump water-proof emulsion according to claim 1, wherein, the weight proportion of used material is: benzene emulsion and elastomeric propylene yogurt liquid base material 39, wherein, the blending ratio of benzene emulsion and elastomeric propylene yogurt liquid is 6: 4; Wetting agent 0.25; Dispersion agent 0.30; Defoamer 0.25; Frostproofer 1.25; Film coalescence aid 4.0; Hydrophober 1.0; Staple fibre 0.05; Filler 1.2; Water 50; Thickening material 2.7.
3. open-air dump water-proof emulsion according to claim 1 and 2, wherein, described filler is one or more in wollastonite powder, kaolin, lime carbonate, the talcum powder.
4. open-air dump water-proof emulsion according to claim 1 and 2, wherein, described staple fibre is a polyster fibre.
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| CN200710038384A CN101270247B (en) | 2007-03-23 | 2007-03-23 | Water-proof emulsion for coal pile in the open air |
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| CN200710038384A CN101270247B (en) | 2007-03-23 | 2007-03-23 | Water-proof emulsion for coal pile in the open air |
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| CN102503246B (en) * | 2011-10-31 | 2013-04-10 | 重庆中交科技股份有限公司 | Bituminous pavement preventive maintenance material and preparation method thereof |
| CN104403567B (en) * | 2014-11-10 | 2017-06-06 | 厦门防水博士建筑工程有限公司 | Ten thousand seep throughs |
| CN104893440A (en) * | 2015-04-29 | 2015-09-09 | 安徽嘉木橡塑工业有限公司 | Acrylic acid waterproof material preparation process |
| CN105482595A (en) * | 2016-01-05 | 2016-04-13 | 桐城市慧琦工贸有限公司 | Environment-friendly exterior wall latex coating and preparing method thereof |
| CN106433361A (en) * | 2016-09-13 | 2017-02-22 | 东华大学 | Cement-based waterproof coating applied to large open fine ore heap and preparation method of cement-based waterproof coating |
| CN106508724A (en) * | 2016-12-07 | 2017-03-22 | 成都晟兴牧业机械有限公司 | Feeding equipment |
| CN106614095A (en) * | 2016-12-07 | 2017-05-10 | 成都晟兴牧业机械有限公司 | Cyclic feeder for solving waste feed |
| CN109239262B (en) * | 2018-08-21 | 2022-01-11 | 安徽理工大学 | Coal dust suppressant, dust suppression rate testing device and working method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233637A (en) * | 1998-12-25 | 1999-11-03 | 童忠良 | Water-soluble composite high molecular polymer out-wall coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233637A (en) * | 1998-12-25 | 1999-11-03 | 童忠良 | Water-soluble composite high molecular polymer out-wall coating |
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