CN110330258B - Active excitation type grinding aid for grinding slag in vertical mill - Google Patents
Active excitation type grinding aid for grinding slag in vertical mill Download PDFInfo
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- CN110330258B CN110330258B CN201910589860.6A CN201910589860A CN110330258B CN 110330258 B CN110330258 B CN 110330258B CN 201910589860 A CN201910589860 A CN 201910589860A CN 110330258 B CN110330258 B CN 110330258B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
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Abstract
The invention discloses an active excitation type grinding aid for grinding slag by a vertical mill, belonging to the technical field of slag additives. The grinding aid disclosed by the invention consists of a material A and a material B, wherein the material A consists of the following raw materials in parts by weight: 15-30 parts of polyacrylamide, 10-15 parts of diisopropylethanolamine, 5-10 parts of triethylene glycol, 3-10 parts of butyl cellosolve acetate and 50-75 parts of water; the material B consists of the following raw materials in parts by weight: 5-8 parts of redispersible latex powder, 10-20 parts of superfine aluminum silicate, 10-20 parts of an activator and 40-70 parts of limestone powder. The active excitation type grinding aid for the vertical mill grinding slag is obtained by adopting multiple chlorine-free components through optimized design combination, and various substances in the active excitation type grinding aid have synergistic effect, so that the problem of poor grinding aid effect of the traditional auxiliary agent on the vertical mill grinding slag is effectively solved, and meanwhile, the activity of the mineral powder is effectively excited.
Description
Technical Field
The invention belongs to the technical field of slag additives, and particularly relates to an active excitation type grinding aid for grinding slag by a vertical mill.
Background
Slag is a main byproduct in the steel industry and has been a main object of resource utilization research of solid wastes in cement-based materials. Slag has high activity, but has the potential problem that the slag is difficult to grind, but in order to obtain ore powder with larger fineness, grinding is often required for a longer time, and the energy consumption is necessarily increased. The slag grinding process of the vertical mill is selected by more and more slag powder production enterprises due to the characteristics of simple flow, high grinding efficiency, small occupied area, low civil engineering investment and the like. The research and application of the grinding aid for grinding the mineral powder by the ball mill are mature, while the grinding principle of the vertical mill is different from that of the ball mill, and related research and application reports are few. In addition, the early activity of the slag is low, and how to fully excite the potential activity of the slag is one of the important issues facing the industry at present.
Patent CN109650765A discloses a method for preparing an environment-friendly grinding aid for producing mineral powder by a vertical mill, wherein a large amount of sodium hydroxide is used and carries a large amount of alkali, and after the mineral powder added with the grinding aid is used, the risk of alkali-aggregate reaction of concrete is increased, which is not favorable for the durability of the concrete.
Disclosure of Invention
Aiming at the problems, the invention provides the active excitation type grinding aid for grinding the slag by the vertical mill, which can effectively improve the efficiency of grinding the slag by the vertical mill, reduce the energy consumption and effectively improve the activity of the slag, particularly the activity of early hydration reaction.
The technical scheme adopted by the invention is as follows:
an active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 15-30 parts of polyacrylamide, 10-15 parts of diisopropylethanolamine, 5-10 parts of triethylene glycol, 3-10 parts of butyl cellosolve acetate and 50-75 parts of water; the material B consists of the following raw materials in parts by weight: 5-8 parts of redispersible latex powder, 10-20 parts of superfine aluminum silicate, 10-20 parts of an activator and 40-70 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3-5:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 20-35%, introducing N2Heating to 65-75 deg.C for 20-30min, adding initiator solution, and introducing N2Reacting at 65-75 deg.C for 30-60min for 20-30min, and cooling to room temperature to obtain the final product.
Preferably, the mass percentage concentration of the initiator solution is 2-5%.
Preferably, the initiator is one of azobisisobutylamidine hydrochloride, azobisisobutyronitrile, lauroyl peroxide and ammonium persulfate.
Preferably, the amount of the initiator is 2-5% of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
Preferably, the ethylene glycol butyl ether acetate is monoethylene glycol butyl ether acetate and/or diethylene glycol butyl ether acetate.
More preferably, the ethylene glycol butyl ether acetate is a mixture of monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate in a weight ratio of 3: 1.
The redispersible latex powder is one of vinyl acetate homopolymerization rubber powder, ethylene-vinyl chloride-vinyl metasilicate ternary copolymerization rubber powder and acrylic ester-styrene copolymerization rubber powder.
More preferably, the redispersible latex powder is acrylate and styrene copolymerized rubber powder.
Preferably, the activator consists of aluminum sulfate and calcium formate in a weight ratio of 1-5: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
The addition amount of the material A is 0.02-0.05% of the total weight of the slag, and the addition amount of the material B is 0.03-0.08% of the total weight of the slag.
Has the advantages that:
(1) the formula of the invention is reasonable, the proportion is scientific, each raw material plays an important role, and the polyacrylamide salt has a good material layer stabilizing effect; diisopropylethanolamine and triethylene glycol can be adsorbed on the surfaces of fine material particles, so that the dispersion degree of the ground mineral powder in hot air flow is improved, and the powder selection efficiency is improved; ethylene glycol monobutyl ether acetate can be adsorbed on the surface of slag particles and can permeate into inherent cracks of the slag particles, so that the closing force of the slag particles is reduced, the capacity of forming new cracks under external force of the original cracks is improved, the cracks are expanded, the cracks are prevented from being compounded, the surface hardness of the slag particles is changed, the particles are easier to break, and the grinding efficiency is improved; when the re-dispersible latex powder is contacted with slag and water, the fluidity of the slag can be reduced, the material layer is stabilized, the grinding efficiency of the vertical mill is improved, and the powder selection efficiency cannot be influenced when the re-dispersible latex powder is dried and sorted; the superfine and grid structure of the superfine aluminum silicate can make a slag water spraying system slightly thicken and stabilize a material layer, and has good dispersibility during dispersion during drying; when the aluminum sulfate contacts the slag and the water sprayed on the slag, the aluminum sulfate is easy to agglomerate into large floccules, which is beneficial to the stability of a slag layer and the residue in mineral powder, and is also beneficial to hydration when the mineral powder is applied to cement and concrete, so that the strength of a cement-based material is improved, and the 7d activity of the mineral powder can be effectively improved under the synergistic effect of the aluminum sulfate and the calcium formate; the limestone powder has good grindability, can form ultrafine powder when being ground together with slag, has a physical filling effect, is reasonably graded with mineral powder composition, and can be used as a hydration nucleation point to improve the activity of the mineral powder.
(2) The active excitation type grinding aid for the vertical mill grinding slag is obtained by adopting multiple chlorine-free components through optimized design combination, and various substances in the active excitation type grinding aid have synergistic effect, so that the problem of poor grinding aid effect of the traditional auxiliary agent on the vertical mill grinding slag is effectively solved, and meanwhile, the activity of the mineral powder is effectively excited.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 15 parts of polyacrylamide, 15 parts of diisopropylethanolamine, 5 parts of triethylene glycol, 10 parts of ethylene glycol butyl ether acetate and 50 parts of water; the material B consists of the following raw materials in parts by weight: 8 parts of redispersible latex powder, 10 parts of superfine aluminum silicate, 20 parts of an activating agent and 40 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3:1, and then placingAdding distilled water into a four-neck flask to dilute the mixture to the mass percent concentration of 20 percent, introducing N2Heating to 75 deg.C for 30min, adding initiator solution, and introducing N2Reacting at constant temperature of 75 deg.C for 60min for 20min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 2%.
The initiator is azodiisobutyl amidine hydrochloride.
The dosage of the initiator is 2 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is monoethylene glycol butyl ether acetate.
The redispersible latex powder is vinyl acetate homopolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 1: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill in the embodiment is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
Example 2
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 30 parts of polyacrylamide salt, 10 parts of diisopropylethanolamine, 10 parts of triethylene glycol, 3 parts of ethylene glycol butyl ether acetate and 75 parts of water; the material B consists of the following raw materials in parts by weight: 5 parts of redispersible latex powder, 20 parts of superfine aluminum silicate, 10 parts of activating agent and 70 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to a weight ratio of 5:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 35%, introducing N2Heating to 65 deg.C for 20min, adding initiator solution, and introducing N2Reacting for 30min at constant temperature of 65 ℃, and cooling to room temperature to obtain the polyacrylamide salt.
The initiator solution has a mass percent concentration of 5%.
The initiator is azobisisobutyronitrile.
The dosage of the initiator is 5 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is diethylene glycol butyl ether acetate.
The redispersible latex powder is ternary copolymer rubber powder of ethylene, vinyl chloride and vinyl orthosilicate.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 5: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill in the embodiment is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
Example 3
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 20 parts of polyacrylamide salt, 12 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 7 parts of butyl cellosolve acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 15 parts of superfine aluminum silicate, 16 parts of activating agent and 55 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to a weight ratio of 4:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 25%, introducing N2Heating to 70 deg.C for 25min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 50min for 25min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 4%.
The initiator is lauroyl peroxide.
The dosage of the initiator is 3 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 3: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill in the embodiment is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
Example 4
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 22 parts of polyacrylamide salt, 13 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 6 parts of ethylene glycol butyl ether acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 18 parts of superfine aluminum silicate, 15 parts of activating agent and 60 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 30%, introducing N2Heating to 70 deg.C for 28min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 40min for 22min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 3%.
The initiator is ammonium persulfate.
The dosage of the initiator is 4 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 4: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill in the embodiment is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
Example 5
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 26 parts of polyacrylamide salt, 12 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 6 parts of ethylene glycol butyl ether acetate and 65 parts of water; the material B consists of the following raw materials in parts by weight: 6 parts of redispersible latex powder, 14 parts of superfine aluminum silicate, 18 parts of activating agent and 55 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to a weight ratio of 4:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 30%, introducing N2Heating to 70 deg.C for 25min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 45min for 25min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 3%.
The initiator is azodiisobutyl amidine hydrochloride.
The dosage of the initiator is 4 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 3: 1.
The active excitation type grinding aid for grinding slag by using the vertical mill is used by adding the material A into a water conveying pipeline, grinding the material A together with water, adding the material B onto the slag of a feeding belt, and grinding the material B together with the slag.
Comparative example 1
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 16 parts of methacryloyloxyethyl trimethyl ammonium chloride, 4 parts of sodium methallyl sulfonate, 12 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 7 parts of ethylene glycol butyl ether acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 15 parts of superfine aluminum silicate, 16 parts of activating agent and 55 parts of limestone powder.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 3: 1.
The use method of the active excitation type grinding aid for grinding slag in the vertical mill in the comparative example is that the material A is added into a water pipeline and is milled together with water, and the material B is added onto the slag of a feeding belt and is milled together with the slag.
This comparative example is different from example 3 in that methacryloyloxyethyltrimethyl ammonium chloride and sodium methallyl sulfonate were not reacted to prepare a polyacrylamide salt, but were directly used as raw materials, and the rest was the same as example 3.
Comparative example 2
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 22 parts of polyacrylamide, 13 parts of diisopropylethanolamine, 6 parts of ethylene glycol butyl ether acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 18 parts of superfine aluminum silicate, 15 parts of activating agent and 60 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 30% of general formula I2Heating to 70 deg.C for 28min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 40min for 22min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 3%.
The initiator is ammonium persulfate.
The dosage of the initiator is 4 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 4: 1.
The use method of the active excitation type grinding aid for grinding slag in the vertical mill in the comparative example is that the material A is added into a water pipeline and is milled together with water, and the material B is added onto the slag of a feeding belt and is milled together with the slag.
This comparative example differs from example 4 in that no triethylene glycol is added, and is otherwise the same as example 4.
Comparative example 3
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 20 parts of polyacrylamide salt, 12 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 7 parts of butyl cellosolve acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 15 parts of superfine aluminum silicate, 16 parts of an activating agent and 55 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to a weight ratio of 4:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 25%, introducing N2Heating to 70 deg.C for 25min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 50min for 25min, and cooling toAnd (5) obtaining the polyacrylamide salt at room temperature.
The mass percentage concentration of the initiator solution is 4%.
The initiator is lauroyl peroxide.
The dosage of the initiator is 3 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 3: 1.
The use method of the active excitation type grinding aid for grinding slag in the vertical mill in the comparative example is that the material A is added into a water pipeline and is milled together with water, and the material B is added onto the slag of a feeding belt and is milled together with the slag.
This comparative example differs from example 3 in that there is no redispersible latex powder and the rest is the same as example 3.
Comparative example 4
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 22 parts of polyacrylamide salt, 13 parts of diisopropylethanolamine, 8 parts of triethylene glycol and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 18 parts of superfine aluminum silicate, 15 parts of activating agent and 60 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 30%, introducing N2Heating to 70 deg.C for 28min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 40min for 22min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 3%.
The initiator is ammonium persulfate.
The dosage of the initiator is 4 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 4: 1.
The use method of the active excitation type grinding aid for grinding slag in the vertical mill in the comparative example is that the material A is added into a water pipeline and is milled together with water, and the material B is added onto the slag of a feeding belt and is milled together with the slag.
The comparative example differs from example 4 in that no redispersible latex powder is added, and the rest is the same as example 4.
Comparative example 5
An active excitation type grinding aid for grinding slag in a vertical mill is composed of a material A and a material B, wherein the material A is composed of the following raw materials in parts by weight: 22 parts of polyacrylamide salt, 13 parts of diisopropylethanolamine, 8 parts of triethylene glycol, 6 parts of ethylene glycol butyl ether acetate and 60 parts of water; the material B consists of the following raw materials in parts by weight: 7 parts of redispersible latex powder, 15 parts of activating agent and 60 parts of limestone powder.
The polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 30%, introducing N2Heating to 70 deg.C for 28min, adding initiator solution, and introducing N2Reacting at constant temperature of 70 deg.C for 40min for 22min, and cooling to room temperature to obtain the final product.
The mass percentage concentration of the initiator solution is 3%.
The initiator is ammonium persulfate.
The dosage of the initiator is 4 percent of the total weight of the methacryloyloxyethyl trimethyl ammonium chloride and the sodium methallyl sulfonate.
The ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to the weight ratio of 3: 1.
The redispersible latex powder is acrylate and styrene copolymerized rubber powder.
The activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 4: 1.
The use method of the active excitation type grinding aid for grinding slag in the vertical mill in the comparative example is that the material A is added into a water pipeline and is milled together with water, and the material B is added onto the slag of a feeding belt and is milled together with the slag.
This comparative example differs from example 4 in that no ultra-fine aluminum silicate is added, and is otherwise identical to example 4.
Performance testing
In a mineral powder production enterprise at Shandong near-Yi, the grinding aid of the embodiment 1-5, the comparative example 1-5 and the grinding aid for a ball mill sold in the market are used for grinding slag in a vertical mill, the material A is added into a water conveying pipeline and is milled together with water, and the material B is added onto slag of a feeding belt and is milled together with the slag. Commercial grinding aids are also added to the water line and milled with the water. The addition amount of the material A is 0.02-0.05% of the total weight of the slag, and the addition amount of the material B is 0.03-0.08% of the total weight of the slag. The slag activity index test is determined according to the method in appendix A of GB/T18046-2017 granulated blast furnace slag powder for cement, mortar and concrete.
TABLE 1 Industrial Experimental data
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (8)
1. An active excitation type grinding aid for grinding slag in a vertical mill is characterized by comprising a material A and a material B, wherein the material A comprises the following raw materials in parts by weight: 15-30 parts of polyacrylamide, 10-15 parts of diisopropylethanolamine, 5-10 parts of triethylene glycol, 3-10 parts of butyl cellosolve acetate and 50-75 parts of water; the material B consists of the following raw materials in parts by weight: 5-8 parts of redispersible latex powder, 10-20 parts of superfine aluminum silicate, 10-20 parts of an activator and 40-70 parts of limestone powder; the activating agent consists of aluminum sulfate and calcium formate according to the weight ratio of 1-5: 1;
the polypropylene alkylamine salt is prepared by the following method: mixing methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate according to the weight ratio of 3-5:1, placing the mixture into a four-neck flask, adding distilled water to dilute the mixture until the mass percentage concentration is 20-35%, introducing N2Heating to 65-75 deg.C for 20-30min, adding initiator solution, and introducing N2Reacting at 65-75 deg.C for 30-60min for 20-30min, and cooling to room temperature to obtain the final product.
2. The active excitation type grinding aid for vertical mill slag grinding as claimed in claim 1, wherein the initiator is one of azobisisobutylamidine hydrochloride, azobisisobutyronitrile, lauroyl peroxide and ammonium persulfate; the mass percentage concentration of the initiator solution is 2-5%.
3. The active excitation type grinding aid for grinding slag in a vertical mill according to claim 1, wherein the amount of the initiator is 2-5% of the total weight of methacryloyloxyethyl trimethyl ammonium chloride and sodium methallyl sulfonate.
4. The active excitation type grinding aid for grinding slag in a vertical mill according to claim 1, wherein the ethylene glycol butyl ether acetate is monoethylene glycol butyl ether acetate and/or diethylene glycol butyl ether acetate.
5. The active excitation type grinding aid for grinding slag by using the vertical mill as claimed in claim 1, wherein the ethylene glycol butyl ether acetate is obtained by mixing monoethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate according to a weight ratio of 3: 1.
6. The active excitation type grinding aid for vertical mill slag grinding as claimed in claim 1, wherein the redispersible latex powder is one of vinyl acetate homopolymerized rubber powder, ethylene-vinyl chloride-vinyl metasilicate ternary copolymerized rubber powder, and acrylate-styrene copolymerized rubber powder.
7. The active excitation type grinding aid for grinding slag in a vertical mill according to any one of claims 1 to 6, wherein the grinding aid is used by feeding the material A into a water conveying pipeline and grinding the material A together with water, and feeding the material B onto the slag of a feeding belt and grinding the material B together with the slag.
8. The active excitation type grinding aid for grinding slag through a vertical mill according to claim 7, wherein the addition amount of the material A is 0.02-0.05% of the total weight of the slag, and the addition amount of the material B is 0.03-0.08% of the total weight of the slag.
Priority Applications (1)
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| CN113135688B (en) * | 2021-05-27 | 2022-09-27 | 金明寓建设集团有限公司 | Active grinding aid for grinding steel slag by vertical mill |
| CN113461350B (en) * | 2021-07-08 | 2022-04-01 | 安徽海螺新材料科技有限公司 | Vertical mill powder bed stabilizer and preparation method and application thereof |
| CN114057426B (en) * | 2021-12-22 | 2022-08-26 | 安徽海螺新材料科技有限公司 | Additive for cement production by vertical mill finish grinding process and preparation method thereof |
| CN116535122A (en) * | 2023-05-12 | 2023-08-04 | 辽宁天宝华瑞建材有限公司 | Grinding and activating method for steel slag and steel slag grinding-assisting activating agent |
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