CN110665626B - Steel slag modifier with structure-assisted grinding and surface wrapping functions and preparation method thereof - Google Patents
Steel slag modifier with structure-assisted grinding and surface wrapping functions and preparation method thereof Download PDFInfo
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- CN110665626B CN110665626B CN201911095395.7A CN201911095395A CN110665626B CN 110665626 B CN110665626 B CN 110665626B CN 201911095395 A CN201911095395 A CN 201911095395A CN 110665626 B CN110665626 B CN 110665626B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/06—Selection or use of additives to aid disintegrating
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Abstract
The invention provides a steel slag modifier with the functions of structure-assisted grinding and surface wrapping and a preparation method thereof, wherein the steel slag modifier comprises the following raw materials in percentage by weight: 5.0 to 20.0 percent of ethylene glycol, 5.0 to 20.0 percent of triisopropanolamine, 5.0 to 20.0 percent of triethanolamine, 35.0 to 70.0 percent of liquid paraffin and 15.0 to 50.0 percent of kerosene. Compared with the prior art, the steel slag complexing agent with the functions of grinding aid and surface wrapping is obtained by compounding the raw materials and controlling the stirring temperature, the stirring speed and the stirring time, and has obvious effects of improving the grindability and the dispersity of the steel slag. The invention can reduce the energy consumption of steel slag grinding, has the advantages of environmental protection and no pollution in the production process, simple components and low cost, realizes the unification of economy and environmental protection, has obvious economic benefit and social benefit, and is beneficial to the popularization and application of steel slag superfine powder.
Description
Technical Field
The invention belongs to the technical field of steel slag grinding, and particularly relates to a steel slag modifier with the functions of structure grinding aid and surface wrapping and a preparation method thereof.
Background
The steel slag is solid waste generated in the steel-making process, and accounts for about 10-15% of the steel-making yield. The main mineral phases of the steel slag are solid solutions formed by tricalcium silicate, dicalcium silicate, calcium forsterite, calcium aluminoferrite and oxides of silicon, magnesium, iron, manganese and phosphorus, and a small amount of free calcium oxide, metallic iron and the like. The existence of the mineral phases causes the steel slag to have poor grindability and poor compatibility, greatly limits the utilization of the steel slag, causes the stockpiling of a large amount of the steel slag, not only occupies valuable land, but also causes pollution to the surrounding environment and underground water. Therefore, how to improve the grindability of the steel slag and improve the utilization scale of the steel slag is a problem which needs to be solved urgently.
The method for realizing the ultramicro pulverization and the dispersity of the steel slag by utilizing the structure grinding aid technology and the surface wrapping technology is a main research direction for improving the utilization of the steel slag, and particularly solves the problems of poor grindability and poor compatibility of the steel slag. In order to solve the problems, the steel slag complexing agent with the structure grinding-aid and surface-wrapping functions is prepared by a material compounding method, so that the ultramicropulverization and the dispersibility of the steel slag are improved, the high-added-value application of the steel slag is realized, and the synergism of steel enterprises is promoted.
A patent with application number 201811151719.X, published in 2019, 1, 22 and a preparation method thereof discloses a steel slag powder grinding aid for improving particle aggregation, which mainly comprises the following components: 45-48 parts of water, 4-6 parts of industrial salt, 2-3 parts of sodium bicarbonate, 4-5 parts of sodium nitrite, 2-4 parts of urea, 15-17 parts of composite alcohol amine, 17-20 parts of glycerol and 4-5 parts of sugar. The grinding aid is relatively complex in composition, and has 8 substances, so that the actual production difficulty is increased; in addition, the grinding aid also contains sodium nitrite which is extremely harmful to human bodies, and the environment-friendly property is poor.
Disclosure of Invention
The invention aims to provide a steel slag modifier with the functions of structure grinding aid and surface wrapping, solves the problems of poor grindability, poor dispersibility and the like of steel slag, has simple components and low cost, and provides technical support for the popularization and large-scale application of steel slag micro powder technology.
The invention also aims to provide a preparation method of the steel slag modifier with the functions of structure grinding aid and surface wrapping.
The specific technical scheme of the invention is as follows:
the invention provides a steel slag modifier with the functions of structure-assisted grinding and surface wrapping, which comprises the following raw materials in percentage by weight:
the ethylene glycol is analytically pure; the triisopropanolamine is analytically pure; the triethanolamine is analytically pure; the liquid paraffin is industrially pure; the kerosene is commercially pure.
The invention provides a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping, which comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the formula ratio, and stirring to obtain an ethylene glycol-triisopropanolamine-triethanolamine mixed solution;
2) mixing the liquid paraffin and the kerosene according to the formula amount, and stirring to obtain a liquid paraffin-kerosene mixed solution;
3) mixing the mixed solution of ethylene glycol-triisopropanolamine-triethanolamine obtained in the step 1) and the mixed solution of liquid paraffin and kerosene obtained in the step 2), and stirring to obtain the steel slag modifier with the functions of structure-assisted grinding and surface coating.
The stirring conditions in the step 1) are as follows: stirring at the rotation speed of 400 r/min-1100 r/min for 60 min-120 min at the temperature of 30-40 ℃ to achieve the aim of uniformly mixing ethylene glycol, triisopropanolamine and triethanolamine;
the stirring conditions in the step 2) are as follows: stirring at the rotation speed of 500 r/min-1000 r/min for 60 min-120 min at the temperature of 25-45 ℃ so as to achieve the purpose of uniformly mixing the liquid paraffin and the kerosene;
the stirring conditions in step 3) are as follows: stirring the mixture for 30 to 60 minutes at a rotating speed of 600 to 800r/min at a temperature of between 25 and 35 ℃ so as to achieve the aim of uniformly dispersing the mixed solution of the ethylene glycol-triisopropanolamine-triethanolamine in the mixed solution of the liquid paraffin and the kerosene, and be beneficial to improving the grinding aid effect of the mixed solution of the ethylene glycol-triisopropanolamine-triethanolamine and the wrapping effect of the mixed solution of the liquid paraffin and the kerosene.
The application method of the steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
mixing the steel slag and the steel slag modifier, and grinding. The using amount of the steel slag modifier is 1.0 percent of the mass of the steel slag.
The invention utilizes ethylene glycol (5.0-20.0%), triisopropanolamine (5.0-20.0%) and triethanolamine (5.0-20.0%) in the steel slag modifier to form the ethylene glycol-triisopropanolamine-triethanolamine mixed solution with grinding aid performance according to the principle of similar compatibility, utilizes the molecules of the surfactant to form a monomolecular adsorption film on the surface of the steel slag to be ground, the steel slag is broken in the crushing process, and the free electrovalence bonds generated on the broken surface of the steel slag are neutralized with ions or molecules provided by the steel slag grinding aid, so that the aggregation tendency of the steel slag micropowder is eliminated or weakened, and the recombination of the broken surface is prevented. In addition, the steel slag modifier is adsorbed on the surface of the steel slag, and the wetting action and the adsorption action of the steel slag modifier on the steel slag are utilized to reduce the surface free energy of the steel slag, weaken the inter-grain resultant force of the steel slag and generate the stress of extrusion cracking seams so as to achieve the effect of damaging the hardness of the steel slag and ensure that the steel slag is easier to grind. In the steel slag modifier, liquid paraffin (35.0-70.0%) and kerosene (15.0-50.0%) form a liquid paraffin-kerosene mixed solution with permeability according to a similar compatibility principle, so that the paraffin-kerosene mixed solution can further improve the dispersibility of the ethylene glycol-triisopropanolamine-triethanolamine mixed solution, increase the contact surface area of the steel slag and improve the grinding aiding effect; on the other hand, the paraffin-kerosene mixed solution has permeability, an organic coating layer is formed on the surface of the steel slag superfine powder after grinding and crushing, the agglomeration of the steel slag superfine powder is reduced, the dispersion effect of the modified steel slag superfine powder is improved, and the agglomeration is prevented, so that the aim of good compatibility with other materials is fulfilled.
Compared with the prior art, the steel slag complexing agent with the structure grinding aid and the surface coating function is obtained by compounding 5.0-20.0 percent of ethylene glycol, 5.0-20.0 percent of triisopropanolamine, 5.0-20.0 percent of triethanolamine, 35.0-70.0 percent of liquid paraffin and 15.0-50.0 percent of kerosene, and controlling the stirring temperature, the stirring speed and the stirring time, and has obvious effect on improving the grindability and the dispersibility of steel slag. Moreover, the steel slag modifier provided by the invention can reduce the energy consumption of steel slag grinding, is environment-friendly and pollution-free in the production process, simple in components and low in cost, realizes the unification of economy and environmental protection, has obvious economic benefit and social benefit, and is beneficial to popularization and application of steel slag superfine powder.
Detailed Description
The invention is further illustrated by the following examples in which: ethylene glycol is analytically pure; the triisopropanolamine is analytically pure; the triethanolamine is analytically pure; the liquid paraffin is industrially pure; the kerosene is commercially pure. The above products are all commercially available.
Example 1
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 80min at the temperature of 35 ℃ and the rotating speed of 900r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 110min at the temperature of 40 ℃ at the rotating speed of 600r/min by using a constant-temperature magnetic stirrer to obtain a liquid paraffin-kerosene mixed solution.
3) And mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 40min at a rotation speed of 800r/min by using a constant-temperature magnetic stirrer at a temperature of 25 ℃ to obtain the steel slag modifier.
Example 2
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 120min at the temperature of 40 ℃ and the rotating speed of 700r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 90min at the rotation speed of 900r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain a liquid paraffin-kerosene mixed solution.
3) And finally, mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 60min at a rotation speed of 600r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain the steel slag modifier.
Example 3
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 100min at the temperature of 30 ℃ and the rotating speed of 500r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 70min at 35 ℃ by using a constant-temperature magnetic stirrer at the rotating speed of 1000r/min to obtain a liquid paraffin-kerosene mixed solution.
3) And mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 30min at 35 ℃ and 700r/min by using a constant-temperature magnetic stirrer to obtain the steel slag complexing agent.
Example 4
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 60min at 35 ℃ and at the rotating speed of 800r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 110min at 35 ℃ by using a constant-temperature magnetic stirrer at the rotating speed of 700r/min to obtain a liquid paraffin-kerosene mixed solution.
3) And mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 50min at a rotation speed of 600r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain the steel slag modifier.
Example 5
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 120min at 40 ℃ and the rotating speed of 1000r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 70min at the temperature of 30 ℃ and the rotating speed of 800r/min by using a constant-temperature magnetic stirrer to obtain a liquid paraffin-kerosene mixed solution.
3) And mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 50min at 35 ℃ and at the rotating speed of 800r/min by using a constant-temperature magnetic stirrer to obtain the steel slag modifier.
Example 6
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 80min at the temperature of 30 ℃ and the rotating speed of 600r/min by using a constant-temperature magnetic stirrer to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 90min at 40 ℃ by using a constant-temperature magnetic stirrer at a rotating speed of 500r/min to obtain a liquid paraffin-kerosene mixed solution.
3) Mixing the mixed solution of ethylene glycol-triisopropanolamine-triethanolamine with the mixed solution of liquid paraffin and kerosene, and stirring for 60min at a rotation speed of 700r/min at a temperature of 25 ℃ by using a constant-temperature magnetic stirrer to obtain the steel slag complexing agent.
100g of steel slag powder grinding aid for improving particle aggregation and a preparation method thereof, which is disclosed in the patent with the application number of 201811151719.X, is prepared and compared with the grinding aid prepared in the application, the grinding aid prepared in the patent has the following advantages:
comparative example 1
The steel slag powder grinding aid for improving particle aggregation is prepared from the following raw materials in parts by mass:
wherein the mass ratio of monoethanolamine to propylene glycol in the composite alcohol amine is 1: 1;
sequentially adding the water, the industrial salt, the sodium bicarbonate, the sodium nitrite, the urea and the composite alcohol amine which are monoethanolamine, propylene glycol (the mass ratio is 1:1), glycerol and sugar according to the mass, and obtaining the steel slag powder grinding aid after the materials are completely added and fully dissolved.
Comparative example 2
The steel slag powder grinding aid for improving particle aggregation is prepared from the following raw materials in mass
The composite alcohol amine is monoethanolamine and propylene glycol in a mass ratio of 1: 1; and sequentially adding the water, the industrial salt, the sodium bicarbonate, the sodium nitrite, the urea, the composite alcohol amine, the glycerol and the sugar in the above mass, and obtaining the steel slag powder grinding aid after the materials are completely added and fully dissolved.
Comparative example 3
A steel slag modifier is prepared from the following raw materials in parts by mass:
liquid Paraffin 50.0g
Kerosene 50.0g
The preparation method of the steel slag modifier comprises the following steps: mixing the liquid paraffin and the kerosene according to the formula amount, and stirring for 90min at 40 ℃ by using a constant-temperature magnetic stirrer at a rotating speed of 500r/min to obtain a liquid paraffin-kerosene mixed solution. Then, stirring the liquid paraffin-kerosene mixed solution for 60min at the temperature of 25 ℃ at the rotating speed of 700r/min by using a constant-temperature magnetic stirrer to obtain the steel slag modifier.
Comparative example 4
A steel slag modifier is prepared from the following raw materials in parts by mass:
ethylene glycol 40.0g
Triisopropanolamine 40.0g
Triethanolamine (20.0 g).
The preparation method of the steel slag modifier comprises the following steps: mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the formula ratio, and stirring for 80min at the rotation speed of 600r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine. And secondly, stirring the mixed solution of ethylene glycol, triisopropanolamine and triethanolamine for 60min at a temperature of 25 ℃ and a rotating speed of 700r/min by using a constant-temperature magnetic stirrer to obtain the steel slag complexing agent.
Comparative example 5
A steel slag modifier is prepared from the following raw materials in parts by mass:
the preparation method of the steel slag modifier comprises the following steps: mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 60min at a rotation speed of 800r/min by using a constant-temperature magnetic stirrer at a temperature of 30 ℃ to obtain an ethylene glycol-triisopropanolamine-triethanolamine mixed solution; mixing the liquid paraffin and kerosene, and stirring for 85min at a rotation speed of 700r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain a liquid paraffin-kerosene mixed solution; and mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 45min at a rotation speed of 800r/min by using a constant-temperature magnetic stirrer at a temperature of 25 ℃ to obtain the steel slag modifier.
Comparative example 6
A steel slag modifier is prepared from the following raw materials in parts by mass:
the preparation method of the steel slag modifier comprises the following steps: mixing the ethylene glycol and triethanolamine in the mass, and stirring for 70min at 35 ℃ and 1000r/min by using a constant-temperature magnetic stirrer to obtain an ethylene glycol-triethanolamine mixed solution; mixing the liquid paraffin and kerosene with the mass, and stirring for 90min at the temperature of 40 ℃ at the rotating speed of 800r/min by using a constant-temperature magnetic stirrer to obtain a liquid paraffin-kerosene mixed solution; and mixing the obtained ethylene glycol-triisopropanolamine-triethanolamine mixed solution with a liquid paraffin-kerosene mixed solution, and stirring for 40min at a rotation speed of 700r/min by using a constant-temperature magnetic stirrer at the temperature of 30 ℃ to obtain the steel slag modifier.
Comparative example 7
A steel slag modifier with the functions of structure grinding aid and surface wrapping is prepared from the following raw materials in parts by mass:
a preparation method of a steel slag modifier with the functions of structure grinding aid and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the mass, and stirring for 80min at a rotation speed of 600r/min by using a constant-temperature magnetic stirrer at the temperature of 20 ℃ to obtain the mixed solution of the ethylene glycol, the triisopropanolamine and the triethanolamine.
2) And mixing the liquid paraffin and the kerosene with the mass, and stirring for 90min at 40 ℃ by using a constant-temperature magnetic stirrer at the rotating speed of 300r/min to obtain a liquid paraffin-kerosene mixed solution.
3) Mixing the mixed solution of ethylene glycol-triisopropanolamine-triethanolamine with the mixed solution of liquid paraffin and kerosene, and stirring for 100min at a rotation speed of 700r/min at a temperature of 25 ℃ by using a constant-temperature magnetic stirrer to obtain the steel slag modifier.
The steel slag modifier prepared in the embodiments 1-6, the steel slag powder grinding aid prepared in the comparative examples 1-2 and the steel slag modifier prepared in the comparative examples 3-7 are all used for treating the steel slag generated under the same condition of the same steel type. The processing method comprises the following steps:
500g of steel slag with the particle size of less than 5mm is mixed with 5g of the steel slag modifier prepared in the embodiment 1-6, 5g of the steel slag powder grinding aid prepared in the comparative example 1-2 or the steel slag modifier prepared in the comparative example 3-7 respectively, and then the mixture is ground for 120min at the rotating speed of 800r/min by using a variable frequency planetary ball mill under the same condition, so that the modified steel slag superfine powder is obtained. The particle size distribution of the modified steel slag superfine powder is tested by an LS-POP (9) type laser particle sizer and is shown in the following table 1.
TABLE 1 particle size distribution of modified steel slag micropowder
Aiming at the steel slag with the particle size of less than 5mm, the steel slag dispersing conditions of the examples 1-6 and the comparative examples 1-6 are compared under the same experimental conditions, and the obtained table 1 shows that the particle size distribution of the modified steel slag superfine powder of the examples 1-6 is far better than that of the modified steel slag superfine powder of the comparative examples 1-7, so that the steel slag complexing agent with the structure grinding aid and the surface wrapping function can greatly improve the particle size distribution of the modified steel slag superfine powder.
Claims (4)
1. The steel slag modifier with the functions of grinding aid and surface wrapping is characterized by comprising the following raw materials in percentage by weight:
the preparation method of the steel slag modifier with the functions of structure grinding and surface wrapping comprises the following steps:
1) mixing the ethylene glycol, the triisopropanolamine and the triethanolamine according to the formula ratio, and stirring to obtain an ethylene glycol-triisopropanolamine-triethanolamine mixed solution;
2) mixing the liquid paraffin and the kerosene according to the formula amount, and stirring to obtain a liquid paraffin-kerosene mixed solution;
3) mixing the mixed solution of ethylene glycol-triisopropanolamine-triethanolamine obtained in the step 1) and the mixed solution of liquid paraffin and kerosene obtained in the step 2), and stirring to obtain the steel slag modifier with the functions of structure-assisted grinding and surface coating.
2. The steel slag modifier with the functions of grinding aid and wrapping the surface of the steel slag according to claim 1, wherein the stirring conditions in the step 1) are as follows: stirring at the rotation speed of 500 r/min-1000 r/min for 60 min-120 min at the temperature of 30-40 ℃.
3. The steel slag modifier with the functions of grinding aid and surface wrapping according to claim 1, wherein the stirring conditions in the step 2) are as follows: stirring at the rotation speed of 500 r/min-1000 r/min for 60 min-120 min at the temperature of 30-40 ℃.
4. The steel slag modifier with the functions of grinding aid and wrapping the surface of the steel slag according to claim 1, wherein the stirring conditions in the step 3) are as follows: stirring at the rotating speed of 600 r/min-800 r/min for 30 min-60 min at the temperature of 25-35 ℃.
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