CN105198275A - Cement grinding aid and preparation method thereof - Google Patents
Cement grinding aid and preparation method thereof Download PDFInfo
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- CN105198275A CN105198275A CN201510713130.4A CN201510713130A CN105198275A CN 105198275 A CN105198275 A CN 105198275A CN 201510713130 A CN201510713130 A CN 201510713130A CN 105198275 A CN105198275 A CN 105198275A
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Abstract
The invention discloses a cement grinding aid and a preparation method thereof. Specifically, the cement grinding aid comprises the components in parts by weight: 3-7 parts of glauber's salt, 1-3 parts of industrial salt, 0.5-1.5 parts of sodium nitrite, 0.5-1.5 parts of sodium thiosulfate, 1-3 parts of sodium acetate, 0.3-0.7 part of sodium thiocyanate, 10-30 parts of water, 0.3-0.7 part of triethanolamine, 0.5-1.5 parts of ethylene glycol, 0.3-0.7 part of glycerol, 0.05-0.15 part of Tween, 0.05-0.15 part of polyethylene glycol, 0.01-0.03 part of water-soluble silicone oil, and 0.5-1.5 parts of active silica. By controlling the amount of various materials in the cement grinding aid, the concentration of chloride ions and alkalis in a cement finished product is effectively controlled. In addition, because the amount of triethanolamine in the formula is reduced, the cement grinding aid has the production cost greatly reduced compared with a conventional cement grinding aid.
Description
Technical field
The invention belongs to technical field of cement production, relate to a kind of cement grinding aid, particularly the cement grinding aid of a kind 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 roughly equal to Renminbi 2000 ~ 3000 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 ~ 3 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, 0.3 ~ 0.7 part of Sodium Thiocyanate 99,10 ~ 30 parts of water, 0.3 ~ 0.7 part of trolamine, 0.5 ~ 1.5 part of ethylene glycol, 0.3 ~ 0.7 part of glycerol, 0.05 ~ 0.15 part of tween, 0.05 ~ 0.15 part of polyoxyethylene glycol, 0.01 ~ 0.03 part of water-soluble silicon oil and 0.5 ~ 1.5 part of active silica.
In a preferred embodiment, described cement grinding aid, by weight, comprising: 4 ~ 6 parts of saltcake, 1.5 ~ 2.5 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, 0.4 ~ 0.6 part of Sodium Thiocyanate 99,15 ~ 25 parts of water, 0.4 ~ 0.6 part of trolamine, 0.75 ~ 1.25 part of ethylene glycol, 0.4 ~ 0.6 part of glycerol, 0.075 ~ 0.125 part of tween, 0.075 ~ 0.125 part of polyoxyethylene glycol, 0.015 ~ 0.025 part of water-soluble silicon oil and 0.75 ~ 1.25 part of active silica.
In a preferred embodiment, described cement grinding aid, by weight, comprising: 5 parts of saltcake, 2 parts of Industrial Salts, 1 part of Sodium Nitrite, 1 part of Sulfothiorine, 2 parts of sodium-acetates, 0.5 part of Sodium Thiocyanate 99,20 parts of water, 0.5 part of trolamine, 1 part of ethylene glycol, 0.5 part of glycerol, 0.1 part of tween, 0.1 part of polyoxyethylene glycol, 0.02 part of water-soluble silicon oil, 1 part of active silica.
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, constitutes the important sources of chlorion in cement grinding aid.
Preferably, in above-mentioned cement grinding aid, the purity of described water affects the performance of cement grinding aid hardly, therefore preferred tap water.
Preferably, in above-mentioned cement grinding aid, described tween is tween 20.
Preferably, in above-mentioned cement grinding aid, described polyoxyethylene glycol is poly(oxyethylene glycol) 400.
Preferably, in above-mentioned cement grinding aid, described water-soluble silicon oil is polysiloxane-many alkoxyl groups ether copolymer, be generally yellow or brown yellow oil clear viscous liquid, first generate polysiloxane by hydrolyzing chlorosilane, then form with polyethers condensation, preferably 708 type water-soluble silicon oils.
Preferably, in above-mentioned cement grinding aid, described active silica is the silica derivative obtained after silane coupler modified process by silicon-dioxide.After modification, the wetting ability of self reduces, and effectively can reduce the alkali content in cement grinding aid.Prove through parallel test, use different silane coupler modified active silicas not produce on the final performance of cement grinding aid the impact differed greatly, various active silicon-dioxide is all applicable to preparation cement grinding aid of the present invention.
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 water 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 trolamine, ethylene glycol, glycerol, tween, polyoxyethylene glycol, water-soluble silicon oil and active silica, finally add remaining water 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, 1800kg water is added, add 500kg saltcake successively again, 200kg Industrial Salt, 100kg Sodium Nitrite, 100kg Sulfothiorine, 200kg sodium-acetate and 50kg Sodium Thiocyanate 99, 30min is stirred under 150rpm rotating speed, be heated to 80 DEG C and be incubated 4h, and then add 50kg trolamine successively, 100kg ethylene glycol, 50kg glycerol, 10kg tween 20, 10kg poly(oxyethylene glycol) 400, 2kg708 type water-soluble silicon oil and 100kg active silica, finally add 200kg water 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, 2700kg water is added, add 700kg saltcake successively again, 300kg Industrial Salt, 150kg Sodium Nitrite, 150kg Sulfothiorine, 300kg sodium-acetate and 70kg Sodium Thiocyanate 99, 40min is stirred under 140rpm rotating speed, be heated to 70 DEG C and be incubated 5h, and then add 70kg trolamine successively, 150kg ethylene glycol, 70kg glycerol, 15kg tween 20, 15kg poly(oxyethylene glycol) 400, 3kg708 type water-soluble silicon oil and 150kg active silica, finally add 300kg water 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, 2200kg water is added, add 600kg saltcake successively again, 250kg Industrial Salt, 125kg Sodium Nitrite, 125kg Sulfothiorine, 250kg sodium-acetate and 60kg Sodium Thiocyanate 99, 40min is stirred under 150rpm rotating speed, be heated to 80 DEG C and be incubated 5h, and then add 60kg trolamine successively, 125kg ethylene glycol, 60kg glycerol, 12.5kg tween 20, 12.5kg poly(oxyethylene glycol) 400, 2.5kg708 type water-soluble silicon oil and 125kg active silica, finally add 300kg water 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 0.1% 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 2000 ~ 3000 yuan per ton of existing cement grinding aid, cement grinding aid of the present invention can save half, or even the cost of 2/3rds, has significant economic worth.
Claims (10)
1. a cement grinding aid, by weight, it comprises: 3 ~ 7 parts of saltcake, 1 ~ 3 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, 0.3 ~ 0.7 part of Sodium Thiocyanate 99,10 ~ 30 parts of water, 0.3 ~ 0.7 part of trolamine, 0.5 ~ 1.5 part of ethylene glycol, 0.3 ~ 0.7 part of glycerol, 0.05 ~ 0.15 part of tween, 0.05 ~ 0.15 part of polyoxyethylene glycol, 0.01 ~ 0.03 part of water-soluble silicon oil and 0.5 ~ 1.5 part of active silica.
2. cement grinding aid according to claim 1, by weight, it comprises: 4 ~ 6 parts of saltcake, 1.5 ~ 2.5 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, 0.4 ~ 0.6 part of Sodium Thiocyanate 99,15 ~ 25 parts of water, 0.4 ~ 0.6 part of trolamine, 0.75 ~ 1.25 part of ethylene glycol, 0.4 ~ 0.6 part of glycerol, 0.075 ~ 0.125 part of tween, 0.075 ~ 0.125 part of polyoxyethylene glycol, 0.015 ~ 0.025 part of water-soluble silicon oil and 0.75 ~ 1.25 part of active silica.
3. cement grinding aid according to claim 1, by weight, it comprises: 5 parts of saltcake, 2 parts of Industrial Salts, 1 part of Sodium Nitrite, 1 part of Sulfothiorine, 2 parts of sodium-acetates, 0.5 part of Sodium Thiocyanate 99,20 parts of water, 0.5 part of trolamine, 1 part of ethylene glycol, 0.5 part of glycerol, 0.1 part of tween, 0.1 part of polyoxyethylene glycol, 0.02 part of water-soluble silicon oil and 1 part of active silica.
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 water is tap water.
7. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described tween is tween 20.
8. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described polyoxyethylene glycol is poly(oxyethylene glycol) 400.
9. cement grinding aid according to any one of claim 1 to 3, is characterized in that, described water-soluble silicon oil is 708 type water-soluble silicon oils.
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 water 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 trolamine, ethylene glycol, glycerol, tween, polyoxyethylene glycol, water-soluble silicon oil and active silica, finally add remaining water 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 |
|---|---|---|---|---|
| CN105503015A (en) * | 2016-01-19 | 2016-04-20 | 王金奎 | Portland cement efficient grinding aid and preparation method thereof |
| US20160176758A1 (en) * | 2013-07-12 | 2016-06-23 | Sika Technology Ag | Adjuvant combination of a milling assistant and a concrete admixture for accelerated hydration of cementitious binders |
| CN105731871A (en) * | 2016-01-19 | 2016-07-06 | 王金奎 | Enhanced cement aid and preparation method thereof |
| CN108558262A (en) * | 2017-12-30 | 2018-09-21 | 蒋春霞 | A kind of cement grinding aid |
| CN109437660A (en) * | 2018-12-29 | 2019-03-08 | 山东宏艺科技股份有限公司 | A kind of Ceramic Balls pulverizing cement auxiliary agent and preparation method thereof |
| CN114057417A (en) * | 2021-11-10 | 2022-02-18 | 萍乡亨厚新材科技有限公司 | Cement grinding aid and preparation method thereof |
| CN114657772A (en) * | 2022-03-22 | 2022-06-24 | 安徽中恩化工有限公司 | Bionic scale super wear-resistant agent for textile leather |
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 CN201510713130.4A patent/CN105198275A/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 (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160176758A1 (en) * | 2013-07-12 | 2016-06-23 | Sika Technology Ag | Adjuvant combination of a milling assistant and a concrete admixture for accelerated hydration of cementitious binders |
| US10752546B2 (en) * | 2013-07-12 | 2020-08-25 | Sika Technology Ag | Adjuvant combination of a milling assistant and a concrete admixture for accelerated hydration of cementitious binders |
| CN105503015A (en) * | 2016-01-19 | 2016-04-20 | 王金奎 | Portland cement efficient grinding aid and preparation method thereof |
| CN105731871A (en) * | 2016-01-19 | 2016-07-06 | 王金奎 | Enhanced cement aid and preparation method thereof |
| CN108558262A (en) * | 2017-12-30 | 2018-09-21 | 蒋春霞 | A kind of cement grinding aid |
| CN109437660A (en) * | 2018-12-29 | 2019-03-08 | 山东宏艺科技股份有限公司 | A kind of Ceramic Balls pulverizing cement auxiliary agent and preparation method thereof |
| CN109437660B (en) * | 2018-12-29 | 2020-12-15 | 临沂宏艺科技发展有限公司 | Ceramic ball grinding cement additive and preparation method thereof |
| CN114057417A (en) * | 2021-11-10 | 2022-02-18 | 萍乡亨厚新材科技有限公司 | Cement grinding aid and preparation method thereof |
| CN114057417B (en) * | 2021-11-10 | 2022-10-14 | 萍乡亨厚新材科技有限公司 | Cement grinding aid and preparation method thereof |
| CN114657772A (en) * | 2022-03-22 | 2022-06-24 | 安徽中恩化工有限公司 | Bionic scale super wear-resistant agent for textile leather |
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