CN107501480B - Preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water-quenched slag - Google Patents
Preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water-quenched slag Download PDFInfo
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Abstract
The invention provides a preparation method of an ether polyquaternary ammonium salt dispersant for wet milling of water-quenched slag, which comprises the steps of adding a polyether macromonomer and water into a reaction kettle, and stirring; adding hydrogen peroxide and ammonium persulfate at 5-25 ℃; after the addition of the initiator is finished for 5min, the initiator is started to be dripped, the small monomer solution is dripped within 10min, the dripping time of the small monomer solution is a hour, and the dripping time of the initiator is a +0.5 hour; the initiator consists of mercaptoethanol, sodium formaldehyde sulfoxylate and water, and the small monomer solution consists of quaternary ammonium salt cationic monomer, acrylamide, double-bond-containing silane coupling agent and water; after the dropwise addition is finished, adding sodium hypophosphite monohydrate, curing for b hours, adding liquid alkali when the temperature of the reaction solution is lower than 30 ℃, supplementing water, and stirring uniformly to obtain a finished product of the dispersing agent. The dispersant prepared by the invention has the advantages of improving the grinding efficiency, reducing the viscosity, obviously improving the fluidity of the wet-milled mineral powder after wet milling and reducing the water content of the finished product of the wet-milled mineral powder after wet milling.
Description
Technical Field
The invention belongs to the technical field of building materials, and aims at the current situations of high drying cost and low value of water quenched slag, so that a special dispersing agent for wet grinding is needed, and particularly relates to a preparation method of an ether polyquaternary ammonium salt dispersing agent for wet grinding of water quenched slag.
Background
Wet mechanical grinding is increasingly applied to preparing ultrafine powder, the industrial waste residue discharge process is generally a water cooling or wet discharging mode, the water content of water-quenched slag reaches 10-20%, and the water content of wet-discharged fly ash is higher. The existing grinding mode needs to be dried or burnt, and fuel (generally light diesel oil or coal powder) is consumed for removing water in each ton of water-quenched slag by dozens of kilograms, so that the energy consumption of the existing treatment method is increased. By adopting a stirring, grinding and wet grinding mode, the moisture in the industrial waste residue does not need to be dried, and the moisture in the wet grinding can also play a role of a grinding aid, so that the surface energy and the strength of the mineral admixture are reduced.
the wet grinding slurry rheological property and the wet mechanical grinding efficiency have a direct relation, and the slurry rheological property reflects the interaction among powder particles and the condition of particle agglomeration as the specific surface of the powder becomes larger. The particles will agglomerate or coalesce into a slurry due to electrostatic and van der waals forces and affect rheology. The addition of inorganic and polymeric dispersants to the slurry has a certain effect on both electrostatic and steric hindrance forces, and the steric hindrance produced by adsorption on the particles keeps the particles too close to each other, thereby weakening the van der Waals forces between the particles and forming a stable slurry by the addition of the polymer electrolyte.
The wet grinding dispersant is mostly low molecular weight water-soluble high molecular polymer, common inorganic dispersants comprise sodium silicate, sodium metaphosphate, sodium tripolyphosphate, sodium hydroxide, potassium hydroxide and the like, and common water-soluble high molecular polymer dispersants comprise polyacrylic acid, polymethacrylic acid, polyphosphoric acid, polystyrene sulfonic acid, polyvinyl ammonia, polyvinyl alcohol, polyacrylamide, polyethylene oxide, copolymer of acrylamide and olefine acid and the like. The existing dispersant system has the problems that the inorganic dispersant can not provide enough steric hindrance to assist in dispersing particles, and the high molecular polymer dispersant has the side effect that an anchoring group is singly adsorbed and is not firm or the molecular weight is too large to generate flocculation.
Patent CN 103333664A discloses a high-efficiency environment-friendly grinding aid for wet grinding of phosphate ore, which comprises the following components in percentage by mass: 40-50% of auxiliary agent, 10-20% of cationic dispersant, 5-20% of chelating agent and 10-30% of water, wherein the sum of all the components is 100%; the components are uniformly mixed to obtain the high-efficiency environment-friendly grinding aid for wet grinding of phosphate ore. The efficient environment-friendly grinding aid for wet grinding of phosphate ore is liquid at normal temperature, has good fluidity and small using amount, and generally only needs the efficient environment-friendly grinding aid.
Patent CN 103012637A discloses a heavy calcium carbonate wet grinding dispersant and a preparation method thereof. The method takes sodium polyacrylate as a main macromolecular structure, and adds an auxiliary agent X and an auxiliary agent Y to improve the chelation and the wettability of the sodium polyacrylate in the grinding process. The invention can obviously improve the electrostatic repulsion force and the steric hindrance effect of the dispersing agent on calcium carbonate and ensure the smooth grinding.
Patent CN 101786821A discloses a wet fly ash cementing material with high strength and low cost and a preparation method thereof, wherein the wet fly ash cementing material is prepared from the following raw materials in percentage by mass: 45-66% of dried wet fly ash; 28-49% of active mineral material; 1.5 to 8 percent of chemical curing agent; the active mineral material is prepared from the following raw materials in percentage by mass: 10-60% of blast furnace slag; 10-50% of cement clinker; 10-40% of metakaolin; 5-10% of gypsum; the chemical curing agent is prepared from the following raw materials in percentage by mass: 3-30% of aluminum sulfate; 5-30% of potassium carbonate; 5-30% of sodium silicate; 5-40% of sodium carbonate; 5-30% of sodium sulfate; 10-60% of water reducing agent.
the whole electrification of the ground water-quenched slag presents negative electricity, the electric charge of the slag powder is not deeply researched in the prior patent, and the specific design of a dispersing agent of the slag powder according to the electric charge characteristic is not required. At present, most of products on the market and patents are dispersing agents used in other industries, the dispersing agents are directly used for reference, and the molecular structure and the action mechanism of the dispersing agents are not suitable for wet grinding of slag powder.
disclosure of Invention
The invention aims to provide a preparation method of an ether polyquaternary ammonium salt dispersant for wet grinding of water quenched slag. Aiming at the water-quenched slag with the water content of 30-60 percent of the water-quenched slag admixture, the water-quenched slag with the ton dosage of 0.5-1.5 kg is dripped into the front section of the ball mill according to the measurement, the operation is simple, the grinding efficiency can be improved, the viscosity can be reduced, the fluidity of the wet-milled mineral powder after wet milling can be obviously improved, and the water content of the finished product of the wet-milled mineral powder after wet milling can be reduced.
The technical scheme of the invention is as follows:
a preparation method of an ether polyquaternary ammonium salt dispersant for wet milling of water-quenched slag comprises the following steps of polymerizing the following components in parts by mass, wherein the total parts by mass of the components is 1000 parts:
1) adding 350 parts of polyether macromonomer with molecular weight of 1500-2000 and 300 parts of water of 150-; after homogenization is completed;
2) Measuring the temperature in the kettle, controlling the temperature to be 5-25 ℃, and adding 1.5-5.0 parts of hydrogen peroxide and 0.5-1.5 parts of ammonium persulfate once after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the small monomer solution is dropwise added for a h, the initiator is dropwise added for a +0.5 h, and a is 2-4 h; the initiator consists of 0.5-2.0 parts of mercaptoethanol, 0.3-1.0 part of sodium formaldehyde sulfoxylate and 100-150 parts of water, and the small monomer solution consists of 25-40 parts of quaternary ammonium salt cationic monomer, 10-25 parts of acrylamide, 0.5-2.0 parts of double bond-containing silane coupling agent and 30-50 parts of water;
4) After the dropwise addition is finished, 3.0-8.0 parts of sodium hypophosphite monohydrate is added, curing is carried out for b hours, b is 0.5-2.0 hours, when the temperature of the reaction solution is lower than 30 ℃, 5-15 parts of liquid alkali is slowly added, water is supplemented until the total mass of the solution is 1000 parts, and after uniform stirring, the dispersant mother liquor with the mass fraction of 40% is obtained.
The polyether macromonomer is one or a combination of allyl polyoxyethylene ether, methyl allyl polyoxyethylene ether, isoamylol polyoxyethylene ether and vinyl butyl ether polyoxyethylene ether.
the polyether macromonomer takes the hydration activity degree of the fly ash into consideration, and is preferably a polyether macromonomer with better slump retaining capability, namely one or a composition of two of prenyl polyoxyethylene ether and vinyl butyl ether polyoxyethylene ether, from the matching effect;
The polyether macromonomer considers that a longer polyether macromonomer branched chain cannot be stretched out in a low water-cement ratio cementing material hydration environment, and a long branched chain is easy to curl and wind to cause steric hindrance effect failure, and the polyether macromonomer with a lower molecular weight, namely one or a combination of two of prenyl polyoxyethylene ether and vinyl butyl ether polyoxyethylene ether with the molecular weight of 1500-2000, is preferably selected from a molecular structure mechanism of action.
The quaternary ammonium salt cationic monomer is one or a composition of two of diallyl quaternary ammonium salts and acrylamide alkyl quaternary ammonium salts; preferably acrylamide alkyl quaternary ammonium salt cationic monomer;
The quaternary ammonium salt cationic monomer is preferably one or a combination of two of methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl trimethyl ammonium chloride (DAC).
The quaternary ammonium salt cationic monomer is preferably a composition of methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl trimethyl ammonium chloride (DAC) in a mass ratio of 1: 1.
The double-bond-containing silane coupling agent is one or a composition of more of vinyl trimethylsilane, 3- (2,3 epoxypropoxy) propyl methyldiethoxysilane, vinyl triethoxysilane and gamma-methacryloxypropyl trimethoxysilane;
The double bond-containing silane coupling agent is preferably selected from the group consisting of 1:1 vinyltrimethylsilane and 3- (2,3 glycidoxy) propylmethyldiethoxysilane.
The dropping time a of the small monomer solution is preferably 3 hours, and the curing time b is preferably 1 hour.
The invention has the beneficial effects that:
1. the common inorganic dispersant has no steric hindrance effect, has limited rejection capability and can not reduce the water content of the wet-grinding superfine admixture; common macromolecular polymer dispersants are mostly applied to other industries, and the molecular structure and the size of the dispersant cannot adapt to an application system of the superfine mineral admixture. Taking polyacrylamide as an example, the low molecular weight of the industrial grade product in the market is more than several million molecular weights, the long chain structure of the industrial grade product promotes bridging among particles or enables the particles to flocculate and agglomerate through charge neutralization, the viscosity is increased, in addition, the whole effective adsorption of the whole surface area of the superfine mineral admixture particles with the diameter of several micrometers cannot be realized by the molecular grade, further the application effects of high dispersion and viscosity reduction cannot be achieved, and additionally, the bridging effect can be generated.
2. through Zeta potential measurement, the slag has negative charges, the surface of the slag can be adsorbed by adopting a cationic polymer, and then the slag is dispersed by utilizing electrostatic repulsion and steric hindrance. The ether polyquaternary ammonium salt dispersant is prepared by compounding quaternary amine, phosphate and amide groups, and adopts a polyether macromonomer with the molecular weight of 1500-2000 to provide steric hindrance effect, so as to disperse superfine wet-milled mineral powder and inhibit secondary hydration of the superfine wet-milled mineral powder; in the synthesis process, a strong reducing agent sodium formaldehyde sulfoxylate is adopted, and an oxidation-reduction system and a single initiation system are constructed with the oxidizing agents of ammonium persulfate and hydrogen peroxide to ensure that the process can react at normal temperature or low temperature, so that the process is simple, the working hours are short, and the production is simple and convenient; in the curing stage, a small excess of reducing agent of sodium hypophosphite monohydrate assists sodium formaldehyde sulfoxylate to construct an initiation system, and the surplus amount is equivalent to a part of inorganic dispersant to assist dispersion and secondary hydration.
Drawings
FIG. 1 is a graph of the molecular weight distribution of the dispersant prepared in example 1.
Detailed Description
Example 1
A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) Adding 332 parts by mass of prenyl alcohol polyoxyethylene ether with the molecular weight of 1600 and 275 parts by mass of water into a reaction kettle, and continuously stirring until a stirring solution has no obvious blocky or agglomerate materials; after homogenization is completed;
2) measuring the temperature in the kettle, controlling the temperature at 22 ℃, and adding 4.8 parts of hydrogen peroxide and 0.72 part of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the dropwise adding time of the small monomer solution is 2 hours, and the dropwise adding time of the initiator is 2.5 hours; the initiator consists of 1.85 parts of mercaptoethanol, 0.8 part of sodium formaldehyde sulfoxylate and 110 parts of water, and the small monomer solution consists of 20 parts of DMC, 20 parts of DAC, 16 parts of acrylamide, 1.7 parts of vinyltrimethylsilane and 32 parts of water;
4) after the dropwise addition is finished, 3.5 parts of sodium hypophosphite monohydrate is added, the mixture is cured for 1.8 hours, when the temperature of the reaction solution is lower than 30 ℃, 12.8 parts of liquid caustic soda is slowly added, water is supplemented until the total mass of the solution is 1000 parts, and the dispersant mother liquor with the mass fraction of 40% is obtained after uniform stirring.
Table 1 example 1 dispersant molecular weight distribution table
94.01% of the dispersant component is concentrated at 50480, and another 5.98% of the minor component is concentrated at 1610, the 5.98% component being the incompletely reacted polyether (1600 mw prenol polyoxyethylene ether).
Example 2
A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) Adding 340 parts by mass of prenyl alcohol polyoxyethylene ether with the molecular weight of 1800 and 200 parts by mass of water into a reaction kettle, and continuously stirring until the stirring solution has no obvious blocky or agglomerate materials; after homogenization is completed;
2) measuring the temperature in the kettle, controlling the temperature at 18 ℃, and adding 3.8 parts of hydrogen peroxide and 1.15 parts of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) after adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the small monomer solution is dropwise added for 3 hours, and the initiator is dropwise added for 3.5 hours; the initiator consists of 1.26 parts of mercaptoethanol, 0.68 part of sodium formaldehyde sulfoxylate and 125 parts of water, and the small monomer solution consists of 17.5 parts of DMC, 17.5 parts of DAC, 13.9 parts of acrylamide, 1.0 part of 3- (2, 3-epoxypropoxy) propyl methyldiethoxysilane and 40 parts of water;
4) After the dropwise addition is finished, 5.0 parts of sodium hypophosphite monohydrate is added, the mixture is cured for 1.0 hour, 8.7 parts of caustic soda liquid is slowly added when the temperature of the reaction solution is lower than 30 ℃, water is supplemented until the total mass of the solution is 1000 parts, and the dispersant mother liquor with the mass fraction of 40% is obtained after the uniform stirring.
Example 3
A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) 346 parts of vinyl butyl ether polyoxyethylene ether with molecular weight of 2000 and 180 parts of water are added into a reaction kettle in parts by mass, and the stirring is continued until the stirring solution has no obvious blocky or lumpy materials; after homogenization is completed;
2) Measuring the temperature in the kettle, controlling the temperature to be 9 ℃, and adding 2.0 parts of hydrogen peroxide and 1.2 parts of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the dropwise adding time of the small monomer solution is 2 hours, and the dropwise adding time of the initiator is 2.5 hours; the initiator consists of 0.77 part of mercaptoethanol, 0.46 part of sodium formaldehyde sulfoxylate and 100 parts of water, and the small monomer solution consists of 13 parts of DMC, 13 parts of DAC, 11 parts of acrylamide, 0.3 part of vinyltrimethylsilane, 0.3 part of 3- (2,3 epoxypropoxy) propyl methyldiethoxysilane and 46 parts of water;
4) After the dropwise addition is finished, 8 parts of sodium hypophosphite monohydrate is added, the mixture is cured for 0.5 hour, when the temperature of the reaction solution is lower than 30 ℃, 6.2 parts of liquid caustic soda is slowly added, water is supplemented until the total mass of the solution is 1000 parts, and the dispersant mother liquor with the mass fraction of 40% is obtained after the mixture is uniformly stirred.
example 4
A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) adding 330 parts by mass of a composition of allyl polyoxyethylene ether with the molecular weight of 1500 and methyl allyl polyoxyethylene ether with the molecular weight of 1500 and 150 parts by mass of water into a reaction kettle, and continuously stirring until a stirring solution has no obvious blocky or cluster material; after homogenization is completed;
2) Measuring the temperature in the kettle, controlling the temperature at 10 ℃, and adding 3.4 parts of hydrogen peroxide and 1.5 parts of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) after adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the small monomer solution is dropwise added for 4 hours, and the initiator is dropwise added for 4.5 hours; the initiator consists of 1.67 parts of mercaptoethanol, 0.3 part of sodium formaldehyde sulfoxylate and 150 parts of water, and the small monomer solution consists of 30 parts of DMC, 25 parts of acrylamide, 1.6 parts of vinyl triethoxysilane and 45 parts of water;
4) After the dropwise addition is finished, 3 parts of sodium hypophosphite monohydrate is added, the mixture is cured for 0.7 hour, when the temperature of the reaction solution is lower than 30 ℃, 10.3 parts of liquid caustic soda is slowly added, water is supplemented until the total mass of the solution is 1000 parts, and the dispersant mother liquor with the mass fraction of 40% is obtained after the mixture is uniformly stirred.
Example 5
a preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) adding 337 parts by mass of a composition of prenyl alcohol polyoxyethylene ether with a molecular weight of 1700 and vinyl butyl ether polyoxyethylene ether with a molecular weight of 1700 and 220 parts by mass of water into a reaction kettle, and continuously stirring until the stirring solution has no obvious blocky or agglomerate materials; after homogenization is completed;
2) Measuring the temperature in the kettle, controlling the temperature to be 5 ℃, and adding 5 parts of hydrogen peroxide and 0.5 part of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the dropwise adding time of the small monomer solution is 2.5 hours, and the dropwise adding time of the initiator is 3 hours; the initiator consists of 2 parts of mercaptoethanol, 0.4 part of sodium formaldehyde sulfoxylate and 140 parts of water, and the small monomer solution consists of 12.5 parts of DMC, 12.5 parts of DAC, 22 parts of acrylamide, 0.5 part of gamma-methacryloxypropyltrimethoxysilane and 50 parts of water;
4) And after the dropwise addition is finished, adding 7 parts of sodium hypophosphite monohydrate, curing for 1.2 hours, slowly adding 5 parts of liquid caustic soda when the temperature of the reaction solution is lower than 30 ℃, supplementing water until the total mass of the solution is 1000 parts, and uniformly stirring to obtain the dispersant mother liquor with the mass fraction of 40%.
example 6
A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the adhesive is polymerized by the following components in percentage by mass, the total mass is 1000, and the specific steps are as follows:
1) adding 350 parts by mass of allyl polyoxyethylene ether with the molecular weight of 1700, a composition of prenol polyoxyethylene ether with the molecular weight of 1700 and vinyl butyl ether polyoxyethylene ether with the molecular weight of 1700 and 300 parts by mass of water into a reaction kettle, and continuously stirring until the stirring solution has no obvious blocky or agglomerate materials; after homogenization is completed;
2) measuring the temperature in the kettle, controlling the temperature to be 5 ℃, and adding 1.5 parts of hydrogen peroxide and 1.3 parts of ammonium persulfate at one time after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the dropwise adding time of the small monomer solution is 2.5 hours, and the dropwise adding time of the initiator is 3 hours; the initiator consists of 0.5 part of mercaptoethanol, 1 part of sodium formaldehyde sulfoxylate and 100 parts of water, and the small monomer solution consists of 27 parts of DAC, 10 parts of acrylamide, 1 part of vinyltrimethylsilane, 1 part of 3- (2, 3-glycidoxy) propylmethyldiethoxysilane and 30 parts of water;
4) after the dropwise addition is finished, 4 parts of sodium hypophosphite monohydrate is added, the mixture is cured for 1.2 hours, 15 parts of liquid caustic soda is slowly added when the temperature of the reaction solution is lower than 30 ℃, water is added until the total mass of the solution is 1000 parts, and the dispersant mother liquor with the mass fraction of 40% is obtained after the mixture is uniformly stirred.
results of example testing
The influence of an inorganic dispersant A (configured into a mass fraction of 40%), an organic dispersant B (configured into a mass fraction of 40%) and examples 1-6 commonly used in the market on the fineness, the final water precipitation rate and the viscosity of the slag slurry admixture after wet grinding is respectively inspected by adopting a slurry viscometer and a 500ml measuring cylinder standing and ageing method.
TABLE 2 final water-separating out rate and viscosity of slag slurry admixture
According to the data in the table, the consumption of the inorganic dispersant A commonly used in the market is large, the water content of the slurry cannot be effectively reduced, the consumption of the organic dispersant B is relatively small, the water content is slightly controlled, and the water precipitation rate is large; and both have relatively high viscosities. With the dispersants prepared in examples 1 to 6, the incorporation was significantly reduced and the fineness was significantly improved, with the fineness tending to increase with increasing incorporation and the viscosity and the water-release rate decreasing synchronously. The reason is that the dispersant prepared in the patent can specifically adsorb slag in multiple points, and fully exert repulsive forces such as solvation film acting force, double electric layer electrostatic acting force, steric hindrance and the like.
Claims (7)
1. A preparation method of ether polyquaternary ammonium salt dispersant for wet grinding of water quenching slag is characterized in that: the dispersing agent is polymerized by the following components in parts by mass, wherein the total parts by mass of the components is 1000 parts, and the dispersing agent comprises the following specific steps:
1) adding 330-350 parts of polyether macromonomer with molecular weight of 1500 ~ 2000 and 150-300 parts of water into a reaction kettle, and continuously stirring until the stirring solution has no obvious blocky or cluster materials;
2) Measuring the temperature in the kettle, controlling the temperature to be 5-25 ℃, and adding 1.5-5.0 parts of hydrogen peroxide and 0.5-1.5 parts of ammonium persulfate once after the temperature is stable, wherein the mass fraction of the hydrogen peroxide is 27.5%;
3) After adding hydrogen peroxide and ammonium persulfate for 5min, sequentially dropwise adding an initiator and a small monomer solution, and after adding the initiator, dropwise adding the small monomer solution within 10min, wherein the small monomer solution is dropwise added for a h, the initiator is dropwise added for a +0.5 h, and a is 2-4 h; the initiator consists of 0.5-2.0 parts of mercaptoethanol, 0.3-1.0 part of sodium formaldehyde sulfoxylate and 100-150 parts of water, and the small monomer solution consists of 25-40 parts of quaternary ammonium salt cationic monomer, 10-25 parts of acrylamide, 0.5-2.0 parts of double bond-containing silane coupling agent and 30-50 parts of water;
4) After the dropwise addition is finished, 3.0-8.0 parts of sodium hypophosphite monohydrate is added, curing is carried out for b hours, b is 0.5-2.0 hours, when the temperature of the reaction solution is lower than 30 ℃, 5-15 parts of liquid alkali is slowly added, water is supplemented until the total mass of the solution is 1000 parts, and after uniform stirring, the dispersant mother liquor with the mass fraction of 40% is obtained.
2. the method for preparing the ether type polyquaternary ammonium salt dispersant for wet grinding of water-granulated slag according to claim 1, wherein: the polyether macromonomer is one or a combination of allyl polyoxyethylene ether, methyl allyl polyoxyethylene ether, isoamylol polyoxyethylene ether and vinyl butyl ether polyoxyethylene ether.
3. the method for preparing the ether type polyquaternary ammonium salt dispersant for wet grinding of water-granulated slag according to claim 1, wherein: the quaternary ammonium salt cationic monomer is one or a combination of diallyl quaternary ammonium salt and acrylamide alkyl quaternary ammonium salt.
4. the method for preparing the ether type polyquaternary ammonium salt dispersant for wet grinding of water-granulated slag according to claim 1, wherein: the quaternary ammonium salt cationic monomer is one or a composition of two of methacryloyloxyethyl trimethyl ammonium chloride and acryloyloxyethyl trimethyl ammonium chloride.
5. The method for preparing the ether type polyquaternary ammonium salt dispersant for wet grinding of water-granulated slag according to claim 1, wherein: the quaternary ammonium salt cationic monomer is a composition of methacryloyloxyethyl trimethyl ammonium chloride and acryloyloxyethyl trimethyl ammonium chloride in a mass ratio of 1: 1.
6. the method for preparing the ether type polyquaternary ammonium salt dispersant for wet grinding of water-granulated slag according to claim 1, wherein: the double-bond-containing silane coupling agent is one or a composition of more of vinyltrimethylsilane, vinyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
7. The method for preparing ether type polyquaternary ammonium salt dispersant for wet grinding of water-quenched slag according to claim 1, wherein the dispersant comprises: the dropping time a of the small monomer solution is 3 hours, and the curing time b is 1 hour.
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