CN105198271A - Cement grinding aid and preparation method thereof - Google Patents
Cement grinding aid and preparation method thereof Download PDFInfo
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- CN105198271A CN105198271A CN201510713174.7A CN201510713174A CN105198271A CN 105198271 A CN105198271 A CN 105198271A CN 201510713174 A CN201510713174 A CN 201510713174A CN 105198271 A CN105198271 A CN 105198271A
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Abstract
The invention discloses a cement grinding aid and a preparation method thereof. The cement grinding aid concretely comprises, by weight, 3-7 parts of saltcake, 1-5 parts of industrial salt, 0.5-1.5 parts of sodium nitrite, 0.5-1.5 parts of sodium hyposulfite, 1-3 parts of sodium acetate, 0.5-1.5 parts of sodium sulfocyanate, 2-6 parts of triethanolamine, 0.5-1.5 parts of glycol, 0.3-0.7 parts of glycerol, 0.3-0.7 parts of polyethylene glycol, 0.5-1.5 parts of a high efficiency water reducer and 0.5-1.5 parts of a high efficiency reinforcing agent. The amounts of all materials in the cement grinding aid are controlled in order to effectively control the concentrations of chloride ions and alkalis in finished cement. Additionally, reduction of the amount of triethanolamine in the above formula greatly reduces the production cost of present cement grinding aids.
Description
Technical field
The invention belongs to technical field of cement production, relate to the cement grinding aid of low chlorine, low alkali, low cost, and preparation method thereof.
Background technology
In the grinding process of cement clinker, adding of a small amount of cement grinding aid can not only significantly improve mill efficiency, and can improve the performance of cement.But, but the chlorion simultaneously introduced in cement and alkali bring the unfavorable factor that can not be ignored.Chlorion can cause the corrosion of reinforcing bar in steel and concrete structure, and steel bar corrosion is exactly the important factor affecting steel and concrete structure weather resistance.Basicity too high time of coagulation that will shorten cement, increase water requirement, even likely with aggregate generation alkali, and then destroy concrete structure.
For above-mentioned situation, the countries in the world comprising China have promulgated relevant criterion one after another, the strict content controlling chloride ion in cement and alkali.According to the regulation in GB175-2007 " general purpose portland cement " national standard, allow during cement grinding to add grinding aid, but its volume should be no more than 0.5% of cement quality, the chloride ion content in cement should be not more than 0.06%, and the alkali content in cement should be not more than 0.6%.In strict control cement grinding aid, the content of chlorion and alkali is up to state standards being conducive to final cement products undoubtedly.
But the production cost of existing cement grinding aid of the same type is higher, the cost of finished product per ton is about 4000 ~ 5000 yuan, greatly constrains industrialization and popularizes.Therefore, study and develop a kind of novel low chlorine, low alkali, low cost cement grinding aid by significant.
Summary of the invention
For above-mentioned situation, the invention provides cement grinding aid of a kind of novelty and preparation method thereof.Under the prerequisite ensureing low chlorine and low alkali, greatly reduce production cost, be conducive to being used widely in manufacture of cement.
Specifically, cement grinding aid of the present invention, by weight, comprising: 3 ~ 7 parts of saltcake, 1 ~ 5 part of Industrial Salt, 0.5 ~ 1.5 part of Sodium Nitrite, 0.5 ~ 1.5 part of Sulfothiorine, 1 ~ 3 part of sodium-acetate, 0.5 ~ 1.5 part of Sodium Thiocyanate 99,2 ~ 6 parts of trolamines, 0.5 ~ 1.5 part of ethylene glycol, 0.3 ~ 0.7 part of glycerol, 0.3 ~ 0.7 part of polyoxyethylene glycol, 0.5 ~ 1.5 part of high efficiency water reducing agent and 0.5 ~ 1.5 part of highly efficient intensifying agent.
In a preferred embodiment, described cement grinding aid, by weight, comprising: 4 ~ 6 parts of saltcake, 2 ~ 4 parts of Industrial Salts, 0.75 ~ 1.25 part of Sodium Nitrite, 0.75 ~ 1.25 part of Sulfothiorine, 1.5 ~ 2.5 parts of sodium-acetates, 0.75 ~ 1.25 part of Sodium Thiocyanate 99,3 ~ 5 parts of trolamines, 0.75 ~ 1.25 part of ethylene glycol, 0.4 ~ 0.6 part of glycerol, 0.4 ~ 0.6 part of polyoxyethylene glycol, 0.75 ~ 1.25 part of high efficiency water reducing agent and 0.75 ~ 1.25 part of highly efficient intensifying agent.
In a preferred embodiment, described cement grinding aid, by weight, comprising: 5 parts of saltcake, 3 parts of Industrial Salts, 1 part of Sodium Nitrite, 1 part of Sulfothiorine, 2 parts of sodium-acetates, 1 part of Sodium Thiocyanate 99,4 parts of trolamines, 1 part of ethylene glycol, 0.5 part of glycerol, 0.5 part of polyoxyethylene glycol, 1 part of high efficiency water reducing agent and 1 part of highly efficient intensifying agent.
Preferably, in above-mentioned cement grinding aid, described saltcake is Sulfates mineral, and main component is Disodium sulfate decahydrate.
Preferably, in above-mentioned cement grinding aid, described Industrial Salt is undressed crude salt, and main component is sodium-chlor.
Preferably, in above-mentioned cement grinding aid, described polyoxyethylene glycol is poly(oxyethylene glycol) 400.
Preferably, in above-mentioned cement grinding aid, described high efficiency water reducing agent is Amino-sulfonic Acid-based Water-reducer (ASP), and it is formed by phenol compound, sulfanilate and aldehyde compound condensation; Wherein, described phenol compound be selected from phenol, dihydroxy-benzene, benzenetriol, fortified phenol any one, described aldehyde compound be selected from formaldehyde, acetaldehyde, furfural, trioxymethylene any one.Preferred, described Amino-sulfonic Acid-based Water-reducer is Sodium sulfanilate-phenol-formaldehyde condensate (ASPF-Na).
Preferably, in above-mentioned cement grinding aid, described highly efficient intensifying agent is colloid silica (also known as micropowder silica gel), and it is standby by Gas Phase Electrolysis legal system, and bulk density is minimum, and particle diameter is in nanometer.
Above-mentioned cement grinding aid can be obtained by laxative remedy:
According to the weight part of composition various in described cement grinding aid, calculate each plant demand and correspondingly to take, most of trolamine is added in advance in reaction vessel, add saltcake again, Industrial Salt, Sodium Nitrite, Sulfothiorine, sodium-acetate and Sodium Thiocyanate 99, stir 30 ~ 40 minutes under 140 ~ 150rpm rotating speed, be heated to 70 ~ 80 DEG C and be incubated 4 ~ 5 hours, and then add remaining trolamine, ethylene glycol, glycerol, polyoxyethylene glycol, high efficiency water reducing agent and highly efficient intensifying agent, and continue insulated and stirred 30 ~ 40 minutes, stop heating and stir, discharging when temperature is reduced to 40 DEG C, namely required cement grinding aid is obtained.
By controlling the consumption of various material in cement grinding aid, effectively control chlorion and paper mill wastewater.Be applied in the production of ordinary Portland cement by obtained cement grinding aid with the volume being equal to existing cement grinding aid, after testing, chloride ion content and alkali content all meet the regulation in GB175-2007 " general purpose portland cement " national standard.In addition, because the consumption of the relatively high trolamine of price reduces, therefore compared with existing cement grinding aid, production cost reduces greatly, is conducive to promoting the use of on a large scale.
Embodiment
Come below in conjunction with specific embodiments to set forth the present invention further.It should be noted that, unless there are specified otherwise, the instrument used in following embodiment and material all obtain by commercial means.
Embodiment 1: the preparation of cement grinding aid.
First in reactor, 300kg trolamine is added, add 500kg saltcake successively again, 300kg Industrial Salt, 100kg Sodium Nitrite, 100kg Sulfothiorine, 200kg sodium-acetate and 100kg Sodium Thiocyanate 99, 30min is stirred under 150rpm rotating speed, be heated to 80 DEG C and be incubated 4h, and then add 100kg trolamine successively, 100kg ethylene glycol, 50kg glycerol, 50kg poly(oxyethylene glycol) 400, 100kgASPF-Na and 100kg colloid silica, and continue insulated and stirred 30min, stop heating and stir, discharging when temperature is reduced to 40 DEG C, namely required cement grinding aid is obtained.
Embodiment 2: the preparation of cement grinding aid.
First in reactor, 500kg trolamine is added, add 700kg saltcake successively again, 500kg Industrial Salt, 150kg Sodium Nitrite, 150kg Sulfothiorine, 300kg sodium-acetate and 150kg Sodium Thiocyanate 99, 40min is stirred under 140rpm rotating speed, be heated to 70 DEG C and be incubated 5h, and then add 100kg trolamine successively, 150kg ethylene glycol, 70kg glycerol, 70kg poly(oxyethylene glycol) 400, 150kgASPF-Na and 150kg colloid silica, and continue insulated and stirred 40min, stop heating and stir, discharging when temperature is reduced to 40 DEG C, namely required cement grinding aid is obtained.
Embodiment 3: the preparation of cement grinding aid.
First in reactor, 400kg trolamine is added, add 600kg saltcake successively again, 400kg Industrial Salt, 125kg Sodium Nitrite, 125kg Sulfothiorine, 250kg sodium-acetate and 125kg Sodium Thiocyanate 99, 40min is stirred under 150rpm rotating speed, be heated to 80 DEG C and be incubated 5h, and then add 100kg trolamine successively, 125kg ethylene glycol, 60kg glycerol, 60kg poly(oxyethylene glycol) 400, 125kgASPF-Na and 125kg colloid silica, and continue insulated and stirred 30min, stop heating and stir, discharging when temperature is reduced to 40 DEG C, namely required cement grinding aid is obtained.
Embodiment 4: the parametric measurement of cement grinding aid and cost keeping.
Parallel production 3 batches of ordinary Portland cements, are ensureing that under the prerequisite that other processing condition are constant, mix the cement grinding aid of preparation in embodiment 1 ~ 3 respectively, parameters the results are shown in following table.
As seen from the above table, be under the condition of 0.03% at volume, in the silicate cement of fusion 3 batches of cement grinding aids of the present invention, the content of chlorion and alkali is less than 0.06% and 0.6% respectively, all meets the regulation in GB175-2007 " general purpose portland cement " national standard.In addition, compared with producing cost with the one-tenth of about 4000 ~ 5000 yuan per ton of existing cement grinding aid, cement grinding aid of the present invention cost-savingly can reach about 40% ~ 50%, has significant economic worth.
Claims (10)
1. a cement grinding aid, by weight, it comprises: 3 ~ 7 parts of saltcake, 1 ~ 5 part of Industrial Salt, 0.5 ~ 1.5 part of Sodium Nitrite, 0.5 ~ 1.5 part of Sulfothiorine, 1 ~ 3 part of sodium-acetate, 0.5 ~ 1.5 part of Sodium Thiocyanate 99,2 ~ 6 parts of trolamines, 0.5 ~ 1.5 part of ethylene glycol, 0.3 ~ 0.7 part of glycerol, 0.3 ~ 0.7 part of polyoxyethylene glycol, 0.5 ~ 1.5 part of high efficiency water reducing agent and 0.5 ~ 1.5 part of highly efficient intensifying agent.
2. cement grinding aid according to claim 1, by weight, it comprises: 4 ~ 6 parts of saltcake, 2 ~ 4 parts of Industrial Salts, 0.75 ~ 1.25 part of Sodium Nitrite, 0.75 ~ 1.25 part of Sulfothiorine, 1.5 ~ 2.5 parts of sodium-acetates, 0.75 ~ 1.25 part of Sodium Thiocyanate 99,3 ~ 5 parts of trolamines, 0.75 ~ 1.25 part of ethylene glycol, 0.4 ~ 0.6 part of glycerol, 0.4 ~ 0.6 part of polyoxyethylene glycol, 0.75 ~ 1.25 part of high efficiency water reducing agent and 0.75 ~ 1.25 part of highly efficient intensifying agent.
3. cement grinding aid according to claim 1, by weight, it comprises: 5 parts of saltcake, 3 parts of Industrial Salts, 1 part of Sodium Nitrite, 1 part of Sulfothiorine, 2 parts of sodium-acetates, 1 part of Sodium Thiocyanate 99,4 parts of trolamines, 1 part of ethylene glycol, 0.5 part of glycerol, 0.5 part of polyoxyethylene glycol, 1 part of high efficiency water reducing agent and 1 part of highly efficient intensifying agent.
4. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described saltcake is Sulfates mineral, and main component is Disodium sulfate decahydrate.
5. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described Industrial Salt is undressed crude salt, and main component is sodium-chlor.
6. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described polyoxyethylene glycol is poly(oxyethylene glycol) 400.
7. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described high efficiency water reducing agent is Amino-sulfonic Acid-based Water-reducer.
8. cement grinding aid according to claim 7, is characterized in that, described amido sulfoacid series high-efficiency water reducer is Sodium sulfanilate-phenol-formaldehyde condensate.
9. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described highly efficient intensifying agent is colloid silica.
10. a preparation method for cement grinding aid according to any one of claim 1 to 9, it comprises the following steps:
According to the weight part of composition various in described cement grinding aid, calculate each plant demand and correspondingly to take, most of trolamine is added in advance in reaction vessel, add saltcake again, Industrial Salt, Sodium Nitrite, Sulfothiorine, sodium-acetate and Sodium Thiocyanate 99, stir 30 ~ 40 minutes under 140 ~ 150rpm rotating speed, be heated to 70 ~ 80 DEG C and be incubated 4 ~ 5 hours, and then add remaining trolamine, ethylene glycol, glycerol, polyoxyethylene glycol, high efficiency water reducing agent and highly efficient intensifying agent, and continue insulated and stirred 30 ~ 40 minutes, stop heating and stir, discharging when temperature is reduced to 40 DEG C, namely required cement grinding aid is obtained.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673479A (en) * | 2016-10-25 | 2017-05-17 | 广东弘朝科技有限公司 | Cement grinding aid used for gangue |
| CN107986648A (en) * | 2017-12-26 | 2018-05-04 | 天津山水水泥有限公司 | Portland slag cement and preparation method thereof |
| CN108906305A (en) * | 2018-09-17 | 2018-11-30 | 浙江长盈建材科技有限公司 | A kind of miberal powder grinding aid and preparation method thereof for accelerating miberal powder hardening |
| CN108940553A (en) * | 2018-07-19 | 2018-12-07 | 佛山陵朝新材料有限公司 | A kind of ore crushing grinding aid special |
| CN109231862A (en) * | 2018-09-17 | 2019-01-18 | 浙江长盈建材科技有限公司 | A kind of environment-friendly type water cement grinding aids and preparation method thereof |
| CN111517687A (en) * | 2020-06-15 | 2020-08-11 | 安徽海螺新材料科技有限公司 | Chromium-reducing cement grinding aid and preparation method thereof |
| JP2020158710A (en) * | 2019-03-27 | 2020-10-01 | デンカ株式会社 | Ground improvement material, cement milk, and ground improvement method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432217A (en) * | 2011-09-21 | 2012-05-02 | 东阿东昌天汇科技有限公司 | Sulphamate-based cement grinding aid |
-
2015
- 2015-10-28 CN CN201510713174.7A patent/CN105198271A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432217A (en) * | 2011-09-21 | 2012-05-02 | 东阿东昌天汇科技有限公司 | Sulphamate-based cement grinding aid |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673479A (en) * | 2016-10-25 | 2017-05-17 | 广东弘朝科技有限公司 | Cement grinding aid used for gangue |
| CN107986648A (en) * | 2017-12-26 | 2018-05-04 | 天津山水水泥有限公司 | Portland slag cement and preparation method thereof |
| CN108940553A (en) * | 2018-07-19 | 2018-12-07 | 佛山陵朝新材料有限公司 | A kind of ore crushing grinding aid special |
| CN108906305A (en) * | 2018-09-17 | 2018-11-30 | 浙江长盈建材科技有限公司 | A kind of miberal powder grinding aid and preparation method thereof for accelerating miberal powder hardening |
| CN109231862A (en) * | 2018-09-17 | 2019-01-18 | 浙江长盈建材科技有限公司 | A kind of environment-friendly type water cement grinding aids and preparation method thereof |
| JP2020158710A (en) * | 2019-03-27 | 2020-10-01 | デンカ株式会社 | Ground improvement material, cement milk, and ground improvement method |
| CN111517687A (en) * | 2020-06-15 | 2020-08-11 | 安徽海螺新材料科技有限公司 | Chromium-reducing cement grinding aid and preparation method thereof |
| CN111517687B (en) * | 2020-06-15 | 2022-03-11 | 安徽海螺新材料科技有限公司 | Chromium-reducing cement grinding aid and preparation method thereof |
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Application publication date: 20151230 |