CN101693605A - Composite high-efficient liquid cement grinding aid - Google Patents

Abstract

The invention belongs to the technical field of cement technology admixtures, and relates to a composite high-efficient liquid cement grinding aid which contains water solution with the following materials by weight percent: 10 to 20 percent of triethanolamine, 5 to 10 percent of glycol, 5 to 10 percent of tri-isopropanolamine, 5 to 10 percent of calcium lignosulphonate, 5 to 10 percent of molasses, and 5 to 10 percent of sodium silicate; and the water solution is subjected to magnetization treatment. The composite high-efficient liquid cement grinding aid has the following advantages: by the magnetization treatment, solid/liquid stable suspension durability is good, no separation or sediment phenomenon occurs after long-term storage, dosing amount is low, application range is wide, hourly output of a cement grinding mill can be improved by 15 to 20 percent, cement strength can be improved by 1 to 2MPa, 5 to 8 percent of clinker can be saved, and 5 to 8 percent of industrial residue can be additionally dosed.

Description

A kind of composite high-efficient liquid cement grinding aid

Technical field

The present invention relates to a kind of composite high-efficient liquid cement grinding aid, belong to the technical field of cement industry admixture, in the grinding process of manufacture of cement, add micro-grinding aid, can play the raising mill efficiency, improve the effect of cement performance.

Background technology

At present, the liquid cement grinding additive that the manufacture of cement industry is generally used mainly exists not enough, unscientific place at following technical elements: produce precipitation as long-term storage, the persistence of solid-liquid stable suspersion is poor, and grinding-aid effect is poor, and subject range is narrow, the effect that improves cement performance is poor, contains NH ₃Etc. objectionable constituent, the use cost height.

Summary of the invention

The present invention is in order to overcome the deficiency of above technical elements, a kind of efficient compound liquid cement grinding additive is provided, with nonionogenic tenside is main composite anion tensio-active agent, and can be according to the compound composition of different suitably adjustment of the cement type that is used for, and suitability is wide; Utilize absorption, the dissemination of different components to improve cement grinding efficient, change cement granules simultaneously and distribute and form; Utilize and cement minerals generation chemical reaction, promote the cement minerals aquation, thereby improve strength of cement; Handle through magnetization, make each composition consistency good, long-term storage is not from wash rice, precipitate; No NH3, Cl ^-, K ⁺, Na ⁺Deng oxious component.

Composite high-efficient liquid cement grinding aid of the present invention is characterized in that containing the aqueous solution of following weight proportion raw material: trolamine: 10-20% ethylene glycol: 5-10% tri-isopropanolamine: 5-10% calcium lignin sulphonate 5-10% molasses: 5-10% water glass: 5-10%;

Adopt following method preparation:

At first in retort, add quantitative water, be heated to 40-50 ℃, press formula rate and add calcium lignin sulphonate, open paddle simultaneously, add while stirring, treat that calcium lignin sulphonate dissolves fully after, adding ethylene glycol and water glass, stir about 30 minutes; Add trolamine and tri-isopropanolamine then while stirring, stirred 30 minutes; Stir the molasses that just add formula rate backmost; After treating that all material adds, it is that processing is magnetized in 5000 to 8000 Gausses' magnetic field through intensity that the ON cycle pump makes the aqueous solution, stirs 2-4 hour while magnetize, and filtration is finished product.

Trolamine (TEA) can promote C in the cement minerals ₃The aquation of A suppresses C ₃S, C ₂The S aquation.Because of the N atom is arranged, it has a pair of not shared electron in the trolamine molecule, is easy to form covalent linkage with metal ion, and complexing takes place; Form comparatively stable complex compound; These complex compounds have formed many solvable districts in solution, thereby have improved the rate of diffusion of hydrated product, improve the early strength of cement; Trolamine has increasing specific surface area in cement pulverizing course simultaneously, reduces fineness, accelerates the grinding aid effect of flow velocity.

Tri-isopropanolamine (TIPA) can promote C in the cement minerals ₄The aquation of AF suppresses C ₃A, C ₃The S aquation.Existing amino in the tri-isopropanolamine molecule contains hydroxyl again, has the over-all properties of amine and alcohol; By with difficult aquation mineral C ₄Complex reaction takes place in AF, promotes C ₄AF continues the later strength that aquation improves cement.Simultaneously, tri-isopropanolamine has good dissemination in cement pulverizing course, helps the raising of mill grinding efficiency.

Ethylene glycol is the nonionogenic tenside of hydroxyl.Add these and contain the micromolecular tensio-active agent of polarity in cement pulverizing course, polar molecule can be adsorbed onto particle surface automatically, reduces surface energy, and the electric charge on the shielding particle stops the reunion of small-particle, increases the flowability of material, has strengthened mill efficiency.Ethylene glycol is obvious to the effect of blended material in the cement, can significantly reduce the blended material fineness.

Wood calcium full name calcium lignin sulphonate is that sulphite process is produced xylogen separated behind chemical fibre slurry or the paper pulp by the product after closing among the CaO, is the very wide polymer dispersion of number molecular weight scope, belongs to anion surfactant.Its characteristic has tangible dissemination to cement granules, can improve the velocity of flow of material in the mill in cement pulverizing course.

Molasses are the sugar industry waste residue, contain materials such as OH, COOH, carbonyl because of it, have strong polarity, belong to anion surfactant.Because adsorption is attracted on the nucleus (embryos) of cement-hydrate, hinder the crystallization continued growth, mainly be to C in the cement ₃The A hydrate delays and postpones, and helps the crystal development of other hydrates simultaneously.Molasses mainly work to regulate cement setting time and intermediary and later stages intensity among the present invention.

Grinding aid of the present invention, after handling through hard magnetization, the one, strengthened polarity, make its grinding-aid effect good, the 2nd, improved the stability of grinding aid, long-term storage does not have from wash rice, deposited phenomenon.

Product of the present invention has following result of use and advantage:

＜1〉handle through magnetization, make the persistence of solid-liquid stable suspersion good, long-term storage does not have from wash rice, deposited phenomenon.

＜2〉addition content is low, and use cost is low.

＜3〉applied widely, can adjust composite composition with different cement types.

＜4〉keep specific surface area (fineness) constant, can improve cement mill unit-hour output 15-20%, improve strength of cement 1-2Mpa.

＜5〉keep the cement mill unit-hour output constant, can save the 5-8% grog, the industrial residue of many admixtures 5-8%.

＜6〉product of the present invention does not contain NH ₃, Cl ^-, K ⁺, Na ⁺Deng oxious component, good with the concrete admixture suitability.

Embodiment:

Example 1:

At first in retort, add 460Kg water, be heated to 45 ℃, add the 60Kg calcium lignin sulphonate, open paddle simultaneously, add while stirring, treat that calcium lignin sulphonate dissolves fully after, add 60Kg ethylene glycol and 80Kg water glass, stir about 30 minutes; Add 200Kg trolamine and 60Kg tri-isopropanolamine then while stirring, stirred 30 minutes; Backmost stir and just add the 80Kg molasses; After treating that all material adds, it is that processing is magnetized in 7000 Gausses' magnetic field through intensity that the ON cycle pump makes the aqueous solution, stirs 3 hours while magnetize, filters, and removes precipitation, and clear liquid is finished product with the filtration of 325 eye mesh screens.

Above-mentioned finished product was placed 2 years, took place without any precipitation.

Example 2:

At first in retort, add 520Kg water, be heated to 45 ℃, add the 80Kg calcium lignin sulphonate, open paddle simultaneously, add while stirring, treat that calcium lignin sulphonate dissolves fully after, add 80Kg ethylene glycol and 60Kg water glass, stir about 30 minutes; Add 120Kg trolamine and 80Kg tri-isopropanolamine then while stirring, stirred 30 minutes; Backmost stir and just add the 60Kg molasses; After treating that all material adds, it is that processing is magnetized in 6000 Gausses' magnetic field through intensity that the ON cycle pump makes the aqueous solution, stirs 3 hours while magnetize, filters, and removes precipitation, and clear liquid is finished product with the filtration of 325 eye mesh screens.

Above-mentioned finished product was placed 2 years, took place without any precipitation.

Case effect detects

If no special instructions, following proportioning is weight ratio.

1. do little mill experiment with example 1 product, effect is as follows:

Table 1 cement ingredient scheme:

Numbering	Grog (%)	Slag (%)	Flyash (%)	Gypsum (%)	Grinding aid (%)
						??1	??85	??4	??6	??5	??0
??2	??85	??4	??6	??4	??1
						??3	??80	??10	??5	??4	??1

Table 2 test-results:

2. do little mill test with example 2 products, effect is as follows:

Table 3 proportion scheme:

Numbering	Grog (%)	Slag (%)	Wingdale (%)	Gypsum (%)	Grinding aid (%)
						??1	??60	??30	??5	??5	??0
??2	??60	??30	??5	??4	??1
						??3	??55	??35	??5	??4	??1

Table 4 test-results:

3, do little mill test with example 2 products, effect is as follows:

Table 5 proportion scheme:

Numbering	Grog (%)	Flyash (%)	Gypsum (%)	Grinding aid (%)
					??1	??65	??30	??5	??0
??2	??65	??30	??4	??1
					??3	??60	??35	??4	??1

Table 6 test-results

Claims (1)

1. composite high-efficient liquid cement grinding aid is characterized in that containing the aqueous solution of following weight proportion raw material: trolamine: 10-20% ethylene glycol: 5-10% tri-isopropanolamine: 5-10% calcium lignin sulphonate 5-10% molasses: 5-10% water glass: 5-10%;

Adopt following method preparation:

At first in retort, add quantitative water, be heated to 40-50 ℃, press formula rate and add calcium lignin sulphonate, open paddle simultaneously, add while stirring, treat that calcium lignin sulphonate dissolves fully after, adding ethylene glycol and water glass, stir about 30 minutes; Add trolamine and tri-isopropanolamine then while stirring, stirred 30 minutes; Stir the molasses that just add formula rate backmost; After treating that all material adds, it is that processing is magnetized in 5000 to 8000 Gausses' magnetic field through intensity that the ON cycle pump makes the aqueous solution, stirs 2-4 hour while magnetize, and filtration is finished product.