CN101125742A - Cement grinding aid and preparation method thereof - Google Patents

Abstract

The invention discloses a cement grinding aid and a preparation method thereof. Raw materials of the cement grinding aid consists of 10-30 percent of triethanolamine, 12-30 percent of tirisopropanolamine, 5-20 percent of ethylene glycol, 3-10 percent of propanediol, 15-40 percent of water, 1-5 percent of sodium dodecyl benzene sulfonate, 3-10 percent of lignin and 2-5 percent of anhydrous sodium sulfate; water is poured into a reactor and heated to 40-50 DEG C to be reserved; the sodium dodecyl benzene sulfonate is added to be stirred for 15min; the anhydrous sodium sulfate is added and stirred for 10min, then the lignin is added and stirred for 30min; materials in the reactor are filtered by a 150 mesh screen; the ethylene glycol and the propanediol are added and stirred for 20min; the triethanolamine and the tirisopropanolamine are added and stirred for 30min and the grinding aid products are obtained. The cement grinding aid can improve grinding efficiency and early and later strength of cement and reduce cement cost.

Description

A kind of cement grinding aid and preparation method thereof

Technical field

The invention belongs to the cement additire technical field, especially relate to a kind of cement grinding aid and preparation method thereof.

Background technology

At present, in the Cement industry field, cement grinding aid is used widely in countries in the world.In cement production process, broken and grinding link is that consumes energy is the highest in the whole production link, also be that energy utilization rate is minimum, easily produce full mill, slimeball, wall built-up in the powder-grinding process and influence mill efficiency, therefore in grinding process, add grinding aid, can improve the mill efficiency of cement, reduce grinding power consumption and grinding cost, increase the flowability of cement, improve the quality of cement; And most of cement grinding aids in the market are though some can improve cement output, not ideal enough at cement quality and performance fermentation.

Summary of the invention

In order to overcome the defective that exists in the prior art, the purpose of this invention is to provide a kind of cement grinding aid and preparation method thereof, it not only can improve the unit-hour output of cement, and improves cement intensity, and is energy-saving and cost-reducing, reduces cost.

For achieving the above object, the present invention adopts following technical scheme:

Described cement grinding aid, its raw material is made up of trolamine, tri-isopropanolamine, ethylene glycol, propylene glycol, water, Sodium dodecylbenzene sulfonate, xylogen, anhydrous sodium sulphate, the weight ratio of each component is: trolamine 10%～30%, tri-isopropanolamine 12%～30%, ethylene glycol 5%～20%, propylene glycol 3%～10%, water 15%～40%, Sodium dodecylbenzene sulfonate 1%～5%, xylogen 3%～10%, anhydrous sodium sulphate 2%～5%.

Described cement grinding aid, its feed composition and weight ratio are: trolamine 20%, tri-isopropanolamine 10%, ethylene glycol 15%, propylene glycol 5%, water 35%, Sodium dodecylbenzene sulfonate 3%, xylogen 9%, anhydrous sodium sulphate 3%.

Described cement grinding aid, its feed composition and weight ratio are: trolamine 15%, tri-isopropanolamine 25%, ethylene glycol 10%, propylene glycol 6%, water 30%, Sodium dodecylbenzene sulfonate 1%, xylogen 8%, anhydrous sodium sulphate 5%.

The preparation method of described cement grinding aid, its step is as follows:

1) water filling in reactor, be heated to 40～50 ℃ standby;

2) Sodium dodecylbenzene sulfonate is added, stirred 15 minutes;

3) add anhydrous sodium sulphate and stirred 10 minutes, add xylogen again and stirred 30 minutes;

4) material in the reactor is filtered with 150 eye mesh screens;

5) add ethylene glycol, propylene glycol stirring 20 minutes;

6) add trolamine, tri-isopropanolamine stirring 30 minutes, promptly obtain product.

Owing to adopted aforesaid technical scheme, the present invention has following superiority:

One, cement grinding aid of the present invention and preparation method thereof significantly improves mill efficiency, puies forward the product amplitude and reaches 10～30%, reduces unit grinding pow consumption and grinding cost;

Two, cement grinding aid of the present invention and preparation method thereof, the flowability of increase cement reduces the cement caking phenomenon, reduces and carries cost, cuts the waste;

Three, cement grinding aid of the present invention and preparation method thereof improves the early stage and later strength of cement, and intensity improved 2～3Mpa in three days, and intensity improved 3～5Mpa in 28 days;

Four, cement grinding aid of the present invention and preparation method thereof reduces cement cost, replaces grog with non-blended material alive, saves grog 3%～8%.

The interpolation of cement grinding aid is to cement output and Effect on Performance, as table 1, table 2

Table 1 2.4 * 13m Super-fine grinder (Portland cement P.042.5) of opening a way

Numbering	Unit-hour output (t/h)	Grinding aid consumption (g/t)	Fineness (%)	Vigorous formula specific surface area (m 2/Kg)	Folding strength Mpa		Ultimate compression strength Mpa
									3d	28d	3d	28d
					1	28.5	------	2.0					330	5.0	7.3	30.1	51.1

2

32.5

250

1.8

345

5.5

7.8

32.3

55.2

Table 2 2.4 * 8m Super-fine grinder (slag cement P.S32.5) of opening a way

Numbering	Unit-hour output (t/h)	Grinding aid consumption (g/t)	Fineness (%)	Vigorous formula specific surface area (m 2/Kg)	Folding strength Mpa		Ultimate compression strength Mpa
									3d	28d	3d	28d
					1	24	------	2.8					300	4.7	6.5	15.1	39.2
2	27.5	200	2.5	310					4.5	6.6	17.3	42.5

Embodiment

Embodiment one

Choose raw material by weight: trolamine 20%, tri-isopropanolamine 10%, ethylene glycol 15%, propylene glycol 5%, water 35%, Sodium dodecylbenzene sulfonate 3%, xylogen 9%, anhydrous sodium sulphate 3%;

In reactor, annotate 35% water, be heated to 40～50 ℃ standby; 3% Sodium dodecylbenzene sulfonate is added, stirred 15 minutes; Add 3% anhydrous sodium sulphate and stirred 10 minutes, add 9% xylogen again and stirred 30 minutes; Material in the reactor is filtered with 150 eye mesh screens; Add 15% ethylene glycol, the stirring of 5% propylene glycol 20 minutes; Add 20% trolamine, the stirring of 10% tri-isopropanolamine 30 minutes, promptly obtain the product cement grinding aid.

Embodiment two

Choose raw material by weight: trolamine 15%, tri-isopropanolamine 25%, ethylene glycol 10%, propylene glycol 6%, water 30%, Sodium dodecylbenzene sulfonate 1%, xylogen 8%, anhydrous sodium sulphate 5%;

In reactor, annotate 30% water, be heated to 40～50 ℃ standby; 1% Sodium dodecylbenzene sulfonate is added, stirred 15 minutes; Add 5% anhydrous sodium sulphate and stirred 10 minutes, add 8% xylogen again and stirred 30 minutes; Material in the reactor is filtered with 150 eye mesh screens; Add 10% ethylene glycol, the stirring of 6% propylene glycol 20 minutes; Add 15% trolamine, the stirring of 25% tri-isopropanolamine 30 minutes, promptly obtain the product cement grinding aid.

Claims (4)

1. cement grinding aid, it is characterized in that: its raw material is made up of trolamine, tri-isopropanolamine, ethylene glycol, propylene glycol, water, Sodium dodecylbenzene sulfonate, xylogen, anhydrous sodium sulphate, and the weight ratio of each component is:

Trolamine 10%～30%

Tri-isopropanolamine 12%～30%

Ethylene glycol 5%～20%

Propylene glycol 3%～10%

Water 15%～40%

Sodium dodecylbenzene sulfonate 1%～5%

Xylogen 3%～10%

Anhydrous sodium sulphate 2%～5%.

2. cement grinding aid as claimed in claim 1, it is characterized in that: described cement grinding aid, its feed composition and weight ratio are: trolamine 20%, tri-isopropanolamine 10%, ethylene glycol 15%, propylene glycol 5%, water 35%, Sodium dodecylbenzene sulfonate 3%, xylogen 9%, anhydrous sodium sulphate 3%.

3. cement grinding aid as claimed in claim 1, it is characterized in that: described cement grinding aid, its feed composition and weight ratio are: trolamine 15%, tri-isopropanolamine 25%, ethylene glycol 10%, propylene glycol 6%, water 30%, Sodium dodecylbenzene sulfonate 1%, xylogen 8%, anhydrous sodium sulphate 5%.

4. the preparation method of cement grinding aid as claimed in claim 1, it is characterized in that: its step is as follows:

1) water filling in reactor, be heated to 40～50 ℃ standby;

2) Sodium dodecylbenzene sulfonate is added, stirred 15 minutes;

3) add anhydrous sodium sulphate and stirred 10 minutes, add xylogen again and stirred 30 minutes;

4) material in the reactor is filtered with 150 eye mesh screens;

5) add ethylene glycol, propylene glycol stirring 20 minutes;

6) add trolamine, tri-isopropanolamine stirring 30 minutes, promptly obtain product.