CN102718429B - Enhanced cement grinding aid and preparation method thereof - Google Patents
Enhanced cement grinding aid and preparation method thereof Download PDFInfo
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- CN102718429B CN102718429B CN2012102096921A CN201210209692A CN102718429B CN 102718429 B CN102718429 B CN 102718429B CN 2012102096921 A CN2012102096921 A CN 2012102096921A CN 201210209692 A CN201210209692 A CN 201210209692A CN 102718429 B CN102718429 B CN 102718429B
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Abstract
The invention relates to an enhanced cement grinding aid and a preparation method thereof. The enhanced cement grinding aid comprises the following raw materials by mass percent: 5 to 20% of triethanolamine, 5 to 20% of diethanolamine single isopropyl alcohol amine, 20 to 50% of diisopropyl monoethanolamine, 5 to 8% of propylene glycol, 2 to 8% of lignosulfonate, 3 to 10% of sodium lauryl sulfate, 3 to 10% of sodium humate and 10 to 30% of water. The invention further comprises the preparation method of the enhanced cement grinding aid. The prepared enhanced cement grinding aid has the advantages that the strength of cement is improved, the production efficiency is improved, and the cost is lowered.
Description
Technical field
The present invention relates to a kind of cement grinding aid and preparation method thereof, especially relate to a kind of enhanced cement grinding aid and preparation method thereof.
Background technology
Grinding is an important step in cement production process.Along with the development of grinding technology, the novel milling equipments such as Vertical Mill, asteroid mill have appearred now; Yet because the manufacturing cost of these equipment is high and not clear to finished cement particle performance impact, it still can not be widely used in a short time in manufacture of cement.Change in the process of finished cement at cement clinker, most of manufacture of cement business still use traditional ball mill to carry out cement grinding.Ball mill is applied to the pulverizing of ore the earliest, makes its particle size reduction, and specific surface area increases.Although the use of ball mill has considerable time, low this shortcoming of ball mill mill efficiency does not obtain basic improvement.In the energy that grinding machine consumes, quite a few energy changes acoustic energy, heat energy etc. into, and really be used for material grinding the not enough grinding machine total energy consumption of energy consumption 5%.
Cement grinding aid is a kind of chemical admixture that improves mill grinding efficiency, improves cement performance, be generally directly add in cement mill or by being added to cement clinker, enter to grind on belt, enter together cement grinding mill with cement clinker or other blended material and carry out grinding.After grinding aid entered grinding machine with cement clinker, it was attracted on material particles surface and crackle.Because grinding aid has the polar molecular structure feature, the static electric charge that the foreign ion that it provides has neutralized on the one hand cement clinker and produces because of friction in grinding process, reduced the ability that subparticle is assembled, the grog particle is separated with powder grinding medium, reduce or prevented that slimeball, paste from grinding phenomenon.On the other hand, grinding aid plays a part balance granules surface excess valence link in the material grinding process.The foreign ion balance that its is introduced the upper unsaturated electrovalent bond in new formations surface, make surperficial can the reduction, eliminate thus or weaken the trend that crackle heals again, particle is assembled again.The use of grinding aid not only makes cement granules reach better dispersion state, has also improved simultaneously the friability of cement granules.
The use of cement grinding aid can improve mill efficiency and the mill output of unit time, the energy consumption that reduces grinding machine and the loss of ball mill, thereby reduces the production cost of cement.The history of the existing many decades of grinding aid is used in external cement mill, and the external cement grinding overwhelming majority uses grinding aid, uses grinding aid, and is effectively simple, as use proper 10%～40% the mill efficiency that improves.The output of China's cement in 2011 reaches 20.6 hundred million tons, accounts for 60% left and right of world's cement output, and the grinding aid that domestic manufacturer produces also has very large gap with external product on effect and stability.Most of cement grinding aid enterprise adopts to buy the composite production technique of industrial chemicals, and the threshold that enters this industry is lower, and most cement grinding aid enterprise production technique falls behind, management is lack of standardization, and quality product and cost performance are not high.At present, China's cement grinding aid product has powder and two kinds of forms of liquid, and the liquid volume is 0.02% ~ 0.2%, and the powder volume is 0.5% ~ 1.0%, and southern firms uses liquid product more, and northern Some Enterprises uses powder product.China's cement grinding aid patent is most of is powder product (wherein most products contains various hardening accelerator), and the main component in powder grinding aid is villaumite and sodium sulfate.But, chlorion in villaumite is to cause steel bar corrosion, the major cause that causes reinforced concrete structure failure, sulfate ion in sodium sulfate and the calcium ion in cement generate calcium sulfate, its coefficient of expansion is large, cause the concrete expansion cracking, therefore, powder grinding aid joins in cement and can cause some potential harm.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, and a kind of enhanced cement grinding aid and preparation method thereof is provided, and uses this cement grinding aid, can improve the intensity of cement, enhances productivity, and reduces costs.
The present invention's enhanced cement grinding aid, raw material by following massfraction is made: trolamine 5-20%, di-alcohol monoisopropanolamine 5-20%, diisopropyl ethanolamine 20-50%, propylene glycol 5-8%, sulfonated lignin 2-8%, sodium laurylsulfate 3-10%, sodium humate 3-10%, water 10-30%.
Sodium lignosulfonate and massfraction that wherein said sulfonated lignin preferred mass mark is 30-50% are the mixture of the calcium lignin sulphonate of 50-70%.
The preparation method of the present invention's enhanced cement grinding aid comprises the following steps:
(1) water of 10-30wt% is injected reactor, be heated to 30-60 ℃ (preferred 35-50 ℃), add the sodium laurylsulfate of 3-10wt%, stir 5-25min (preferred 8-12min);
(2) add the sodium humate of 3-10 wt%, stir the preferred 5min of 3-8min(), then add the sulfonated lignin of 2-8wt%, stir the preferred 12-18min of 10-30min();
(3) step (2) gained solution is cooled to room temperature, adds the propylene glycol of 5-8 wt%, stir the preferred 8-18min of 5-25min();
(4) add the di-alcohol monoisopropanolamine of 5-20wt% trolamine, 5-20 wt%, the diisopropyl ethanolamine of 20-50 wt%, stir the preferred 15-25min of 10-30min(), obtain the cement grinding aid product.
Described sulfonated lignin, sodium humate are that granularity is 80-120 purpose dried powder.
Research shows, the enhanced cement grinding aid that the present invention is prepared is all having unusual effect aspect raising mill efficiency and increase strength of cement.Adopt the present invention, take full advantage of trade waste and by product thereof, added di-alcohol monoisopropanolamine novel surfactant on the basis of usual component, effectively improve the cement grinding mill unit-hour output, reduce energy consumption, improve cement performance.The cement that uses this grinding aid to produce is good to concrete admixture adaptability.During grinding, according to the volume of the 0.01%-0.5% of grog and blended material total mass, mix, improve mill efficiency and reach 2%-7%, can also improve cement early strength 1-3MPa, later strength 2-4MPa simultaneously.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.Should be noted that following explanation is only in order to explain the present invention, does not limit its content.
Embodiment 1
The enhanced cement grinding aid A1 of the present embodiment, made by the raw material of following massfraction: trolamine 10%, di-alcohol monoisopropanolamine 8%, diisopropyl ethanolamine 30%, propylene glycol 5%, sulfonated lignin 8%, sodium laurylsulfate 4%, sodium humate 3%, water 32%.Wherein sulfonated lignin comprise the calcium lignin sulphonate of massfraction 35% sodium lignosulfonate and 65%.
The preparation method of the enhanced cement grinding aid of the present embodiment comprises the following steps:
(1) water is injected reactor, be heated to 45 ℃, add sodium laurylsulfate, stir 10min;
(2) add sodium humate, stir 5min, then add sulfonated lignin, stir 15min;
(3) step (2) gained solution is cooled to room temperature, adds propylene glycol, stir 10min;
(4) add trolamine, di-alcohol monoisopropanolamine, diisopropyl ethanolamine, stir 20min, obtain the cement grinding aid product.
Embodiment 2
The enhanced cement grinding aid A2 of the present embodiment, made by the raw material of following massfraction: trolamine 8%, di-alcohol monoisopropanolamine 5%, diisopropyl ethanolamine 43%, propylene glycol 4%, sulfonated lignin 3%, sodium laurylsulfate 4%, sodium humate 3%, water 30%.
Wherein sulfonated lignin comprise massfraction 35% sodium lignosulfonate and 65% calcium lignin sulphonate.
Its preparation method is with embodiment 1.
Embodiment 3
The enhanced cement grinding aid A3 of the present embodiment, made by the raw material of following massfraction: trolamine 5%, di-alcohol monoisopropanolamine 20%, diisopropyl ethanolamine 20%, propylene glycol 8%, sulfonated lignin 5%, sodium laurylsulfate 4%, sodium humate 10%, water 28%.
Wherein sulfonated lignin comprise massfraction 35% sodium lignosulfonate and 65% calcium lignin sulphonate.
Its preparation method is with embodiment 1.
Embodiment 4
The enhanced cement grinding aid A4 of the present embodiment, made by the raw material of following massfraction: trolamine 20%, di-alcohol monoisopropanolamine 5%, diisopropyl ethanolamine 21%, propylene glycol 8%, sulfonated lignin 8%, sodium laurylsulfate 3%, sodium humate 7%, water 28%.
Wherein sulfonated lignin comprise the calcium lignin sulphonate of massfraction 35% sodium lignosulfonate and 65%.
Its preparation method is with embodiment 1.
Embodiment of the present invention 1-4 is described is liquid cement grinding additive, is applied to ball mill when manufacture of cement, is applicable to ordinary Portland cement.General add-on is the 0.01-0.5% of cement quality.
The grinding-aid effect simultaneous test
Embodiment of the present invention 1-4 gained cement grinding aid A1-A4 is applied in the little mill of Φ 500mmx500mm standard test, same cement proportion: peaceful cement mill grog 95%, natural dihydrate gypsum 5%; Grinding quality 3Kg; Grinding time 5min.Result shows employing A1-A4 grinding aid, 3 ~ 30 μ m, and the content of＜80 μ m increases.Admixture embodiment of the present invention 1-4 cement grinding aid affects distribution situation in Table 1 to cement granularity.
The affect distribution situation of table 1 admixture embodiment of the present invention 1-4 cement grinding aid on cement granularity
| Grinding aid | Volume/% | 1~3μm | 3~30μm | 30~80μm | >80μm |
| Blank | 0 | 2.2 | 54.63 | 33.77 | 9.40 |
| A1 | 0.03 | 2.19 | 57.51 | 31.21 | 9.09 |
| A2 | 0.05 | 2.57 | 57.4 | 33.23 | 6.80 |
| A3 | 0.06 | 2.80 | 56.87 | 32.61 | 7.72 |
| A4 | 0.04 | 2.98 | 57.19 | 31.80 | 8.03 |
Add the impact of cement grinding aid on intensity
Embodiment of the present invention 1-4 gained cement grinding aid A1-A4 is applied in the little mill of Φ 500mmx500mm standard test, cement proportion: certain cement mill grog 80%, slag 10%, Wingdale 5%, natural dihydrate gypsum 5%; Grinding quality 5Kg; Grinding time 20min; The test of GB/T 17671-1999 Test method for strength of hydraulic cement mortar.Adopt the permanent loading tester test of TYA-300B type microcomputer control 3 days, 28 days cement mortar bending and compressive strength, test result be in Table 2, result show adopt the A1-A4 grinding aid to cement early, the later strength reinforced effects is good.
The affect experimental result of table 2 admixture embodiment 1-4 enhanced cement grinding aid on strength of cement
| Grinding aid | Volume (%) | 3 days folding strengths (MP) | 3 days ultimate compression strength (MP) | 28 days folding strengths (MP) | 28 days ultimate compression strength (MP) |
| Blank | 0 | 3.7 | 19.3 | 6.0 | 38.8 |
| A1 | 0.03 | 4.3 | 22.1 | 6.4 | 42.3 |
| A2 | 0.05 | 4.6 | 22.9 | 6.6 | 43.7 |
| A3 | 0.06 | 4.3 | 22.4 | 6.6 | 44.8 |
| A4 | 0.04 | 3.9 | 22.6 | 6.3 | 43.5 |
Claims (5)
1. enhanced cement grinding aid, it is characterized in that, raw material by following massfraction is made: trolamine 5-20%, di-alcohol monoisopropanolamine 5-20%, diisopropyl ethanolamine 20-50%, propylene glycol 5-8%, sulfonated lignin 2-8%, sodium laurylsulfate 3-10%, sodium humate 3-10%, water 10-30%.
2. enhanced cement grinding aid according to claim 1, is characterized in that, wherein said sulfonated lignin are that massfraction is that sodium lignosulfonate and the massfraction of 30-50% is the mixture of the calcium lignin sulphonate of 50-70%.
3. enhanced cement grinding aid according to claim 1 and 2, is characterized in that, described sulfonated lignin, sodium humate are that granularity is 80-120 purpose dried powder.
4. the preparation method of an enhanced cement grinding aid as claimed in claim 1 or 2, is characterized in that, comprises the following steps:
(1) water of 10-30wt% is injected reactor, be heated to 30-60 ℃, add the sodium laurylsulfate of 3-10wt%, stir 5-25min;
(2) add the sodium humate of 3-10 wt%, stir 3-8 minute, then add the sulfonated lignin of 2-8wt%, stir 10-30min;
(3) step (2) gained solution is cooled to room temperature, adds the propylene glycol of 5-8 wt %, stir 5-25min;
(4) add the di-alcohol monoisopropanolamine of 5-20wt% trolamine, 5-20 wt%, the diisopropyl ethanolamine of 20-50 wt%, stir 10-30min, obtain the cement grinding aid product.
5. the preparation method of enhanced cement grinding aid according to claim 4, is characterized in that, comprises the following steps:
(1) water of 10-30wt% is injected reactor, be heated to 35-50 ℃, add the sodium laurylsulfate of 3-10wt%, stir 8-12min;
(2) add the sodium humate of 3-10 wt%, stir 5min, then add the sulfonated lignin of 2-8wt%, stir 12-18min;
(3) step (2) gained solution is cooled to room temperature, adds the propylene glycol of 5-8 wt %, stir 8-18min;
(4) add the di-alcohol monoisopropanolamine of 5-20wt% trolamine, 5-20 wt%, the diisopropyl ethanolamine of 20-50 wt%, stir 15-25min, obtain the cement grinding aid product.
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| CN104402295B (en) * | 2014-11-18 | 2016-08-17 | 桂林华越环保科技有限公司 | A kind of enhanced cement grinding aid |
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| CN104496259B (en) * | 2014-11-18 | 2017-01-18 | 桂林华越环保科技有限公司 | Slow-setting grinding aid |
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| CN102060462B (en) * | 2010-12-10 | 2012-11-21 | 山东宏艺科技股份有限公司 | Preparation method of enforced flyash cement grinding aid |
| CN102503235A (en) * | 2011-11-15 | 2012-06-20 | 绍兴试金石建材科技有限公司 | Efficient cement liquid grinding aid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108383419A (en) * | 2018-04-13 | 2018-08-10 | 江西万年青工程有限公司 | A kind of high-efficiency concrete grinding aid |
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Application publication date: 20121010 Assignee: Hunan Xijiesi Building Materials Technology Co. Ltd. Assignor: Shi Caijun Contract record no.: 2013430000182 Denomination of invention: Reinforced type cement grinding aid and preparation method thereof Granted publication date: 20131120 License type: Exclusive License Record date: 20131224 |
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