CN110606675B - Vanadium-titanium slag superfine powder admixture and preparation method thereof - Google Patents
Vanadium-titanium slag superfine powder admixture and preparation method thereof Download PDFInfo
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- CN110606675B CN110606675B CN201910993798.7A CN201910993798A CN110606675B CN 110606675 B CN110606675 B CN 110606675B CN 201910993798 A CN201910993798 A CN 201910993798A CN 110606675 B CN110606675 B CN 110606675B
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- 239000000843 powder Substances 0.000 title claims abstract description 108
- 239000002893 slag Substances 0.000 title claims abstract description 84
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 74
- 238000005406 washing Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 13
- 239000011707 mineral Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 10
- 239000008235 industrial water Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910021532 Calcite Inorganic materials 0.000 claims description 2
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 2
- 239000000378 calcium silicate Substances 0.000 claims description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 210000004127 vitreous body Anatomy 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 15
- 239000004567 concrete Substances 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 8
- 238000006703 hydration reaction Methods 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 abstract description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 238000005191 phase separation Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910001773 titanium mineral Inorganic materials 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- -1 triethanolamine amine Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention relates to a vanadium-titanium slag superfine powder admixture and a preparation method thereof, wherein the preparation method comprises the following steps: pre-grinding, grading and sorting, ultra-fine grinding and re-sorting are carried out on vanadium-titanium slag particles; the specific surface area of the discharged powder subjected to grading and sorting is 400-500 m2Per kg; the specific surface area of the re-sorted discharged powder is 700-800 m2In terms of/kg. The invention provides a preparation method of an efficient vanadium-titanium slag superfine powder admixture, which is used for obtaining the superfine powder with high specific surface area, greatly improving the hydration activity of vanadium-titanium slag, contributing more to the strength of cement, having high grinding efficiency and realizing the efficient resource utilization of the vanadium-titanium slag superfine powder admixture in cement and concrete.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a vanadium-titanium slag superfine powder admixture and a preparation method thereof.
Background
A large amount of granulated blast furnace vanadium-titanium slag can be generated in the process of smelting vanadium-titanium magnetite due to TiO2High content, low hydraulic activity, difficult grinding and failure of effective comprehensive utilization of resources.
At present, scholars grind vanadium-titanium slag and then use the vanadium-titanium slag in cement production and concrete engineering, and the grinding fineness is 400-500 m2About/kg, most of the materials are compounded with fly ash, steel slag, limestone and the like for use, or the potential hydraulicity of the vanadium-titanium mineral powder is excited by a method of adding a proper amount of exciting agent, the activity index of the vanadium-titanium mineral powder singly used as an admixture can only reach the S75 level, the mixing amount is generally low, and the large-scale application of the vanadium-titanium mineral powder in the construction industry is limited. Because slag has a difficult-to-grind phase, which causes the over-high comprehensive power consumption in the grinding process of the ultrafine powder, an urgent need exists at present to provide an efficient preparation method of vanadium-titanium slag ultrafine powder admixture, and the difficult-to-grind phase is separated, so that the grinding efficiency of the powder is improved, and the efficient resource utilization of the powder in cement and concrete is realized.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a preparation method of a vanadium-titanium slag superfine powder admixture.
The invention aims to provide a preparation method of a vanadium-titanium slag superfine powder admixture, which comprises the following steps: pre-grinding, grading and sorting, ultra-fine grinding and re-sorting are carried out on vanadium-titanium slag particles; the specific surface area of the discharged powder subjected to grading and sorting is 400-500 m2Per kg; the specific surface area of the re-sorted discharged powder is 700-800 m2In terms of/kg. The grading and sorting process can help to improve the grinding efficiency of the superfine powder, and then the superfine powder products with the required specific surface area range can be sorted. The two-stage powder selecting process can separate coarse powder from fine powder, prevent the fine powder from agglomerating and reduce the over-grinding phenomenon. The invention provides an effective preparation method of vanadium-titanium slag ultrafine powder admixture, which is used for obtaining ultrafine powder with high specific surface area, greatly improving the hydration activity of vanadium-titanium slag, contributing more to the strength of cement, having high grinding efficiency and realizing the high-efficiency resource utilization of the vanadium-titanium slag ultrafine powder admixture in cement and concrete.
According to some preferred embodiments of the present invention, the ultra-fine grinding is performed in an ultra-fine mill having a rotation speed of 300 to 400 r/min. According to the invention, the change of the rotating speed and the filling rate can influence the particle size of the powder, and by combining with the motion rule of the medium, when the filling rate is lower, the ore grinding process can be accelerated by properly increasing the rotating speed, so that the grinding medium has enough circulation times, and the high-efficiency grinding of the vanadium-titanium slag is realized.
According to some preferred embodiments of the invention, the method comprises the following steps of washing vanadium-titanium slag particles with water, drying, difficult-grinding phase separation, pre-grinding, grading and sorting, ultra-fine grinding, re-sorting and dedusting, wherein grinding aids are added into the pre-grinding. The grinding aid adopted by the invention is adsorbed on the surfaces of fine powder particles of materials, so that the grinding efficiency of vanadium-titanium slag is greatly improved.
According to some preferred embodiments of the present invention, the grinding aid is selected from one or more of triethanolamine, ethylene glycol and glycerol, and preferably, the grinding aid is added in an amount of 0 to 0.5%, preferably 0.3 to 0.5%.
According to some preferred embodiments of the present invention, the feed particle size of the pre-grind is 0 to 10 mm; the pre-grinding adopts a common ball mill, a vibration mill or a vertical mill.
According to some preferred embodiments of the invention, the re-separation is performed by using an ultrafine powder concentrator, and the rotating speed is 100-150 r/min; and/or, after the re-sorting, re-ultrafine grinding the powder with the granularity of more than 500 meshes. After the vanadium-titanium slag superfine powder is separated by the superfine powder separator, qualified products with the particle size less than 500 meshes are collected after dust removal, and unqualified products are ground again and continuously subjected to superfine grinding.
According to some preferred embodiments of the present invention, after classification and sorting, the powder larger than 200 meshes is reground; the grading and sorting adopts a centrifugal powder concentrator, a cyclone powder concentrator or a ventilation powder concentrator. After the vanadium-titanium slag powder is classified and sorted, qualified products with the particle size less than 200 meshes are subjected to the next process, and unqualified products are reground again to continue to be pre-ground.
According to some preferred embodiments of the present invention, the washing solution used in the washing process is normal-temperature industrial water, and the washing solution is washed for a plurality of times until the washing solution is clear; and/or the temperature set in the drying process is 105-110 ℃, preferably, the moisture content of the vanadium-titanium slag is 10-20%, and the vanadium-titanium slag is dried until the moisture content is up to<1 percent; and/or the difficult-to-grind phase separation process is used for screening out metal-containing and/or low-grindability phases in the vanadium-titanium slag. In the invention, the washing procedure adopts normal-temperature industrial water, and the washing liquid is washed for multiple times until the washing liquid is clarified, SO that impurities, partial chlorides and sulfides in the vanadium-titanium slag are removed, and SO is reduced3And Cl-The influence of high content on the stability of cement gelled materials and the application of the cement gelled materials in concrete. In the difficult-to-grind phase separation process, an iron remover is preferably adopted to screen out the phase containing metal and poor grindability in the vanadium-titanium slag, so that the grinding efficiency is improved.
According to some preferred embodiments of the present invention, the barrel of the ultrafining mill is water-cooled. The superfine mill cylinder provided by the invention is cooled by water spraying, the temperature in the mill is reduced, slag powder is prevented from being agglomerated due to electrostatic attraction, and the grinding efficiency is improved.
Another object of the present invention is to provide aThe vanadium-titanium slag superfine powder admixture prepared by the method has the specific surface area of 700-800 m2The vanadium-titanium slag superfine powder admixture comprises perovskite, calcite, calcium silicate, quartz and the like, and the density of the vanadium-titanium slag superfine powder admixture is 2.95-2.97 g/cm3Vitreous content>90 percent. The invention utilizes the superfine grinding activation technology to grind vanadium-titanium slag powder into powder with the specific surface area of 700-800 m2The hydration reaction activity of the/kg superfine powder is greatly improved. The ultrafine vanadium-titanium slag powder meets the S95 level mineral powder activity requirement specified in GB/T18046-2017 granulated blast furnace slag powder for cement, mortar and concrete, and can be applied to concrete and cement products in large scale.
The treatment process provided by the invention can obtain the product with the specific surface area of 700-800 m2/kg of superfine vanadium-titanium slag powder. Because the vanadium-titanium slag contains mineral components of Ti, Fe and V metals, the grindability of the slag is reduced, and the grinding efficiency can be effectively improved by adding the grinding aid.
The invention removes the components difficult to grind, and effectively improves the grinding efficiency of the vanadium-titanium slag through the two-stage grinding and two-stage powder selection technology of pre-grinding, grading separation, superfine grinding and powder re-selection; the performance index of the vanadium-titanium slag superfine powder provided by the invention reaches the requirement of S105 level mineral powder, and the activity of the vanadium-titanium slag superfine powder is improved by a superfine grinding activation technology, so that the high-efficiency resource utilization of the vanadium-titanium slag superfine powder in cement and concrete is realized.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications or substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and scope of the invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art. In the examples, the respective raw materials to be added were commercially available conventional raw materials except for those specifically mentioned.
In a preferred embodiment of the present invention, the vanadium-titanium slag ultrafine powder admixture is washed with industrial water at 20. + -. 1 ℃ CSlag is cleared for 3-4 times until the washing liquid is clear, and the materials are dried at the temperature of 105-110 ℃ until the moisture of the materials is reached<1%, removing magnetic mineral components by an iron remover; adding 0.5% of grinding aid, and grinding 0-10 mm of slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 400-500 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 120-180 min; after the centrifugal powder separator separates out qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine to be continuously ground for 60-90 min at the rotating speed of 300-400 r/min, and after the qualified products are separated by the ultrafine powder separator at the rotating speed of 100-150 r/min, the ultrafine powder with the specific surface area of 700-800 m is finally obtained2/kg。
Example 1
The vanadium-titanium slag superfine powder admixture of the embodiment is prepared by washing vanadium-titanium slag for 3-4 times by using industrial water at 20 +/-1 ℃ until washing liquor is clear, and drying the material at 105-110 ℃ until the moisture of the material is reached<1%, removing magnetic mineral components by an iron remover; adding 0.5% triethanolamine grinding aid, and grinding 0-10 mm slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 480-500 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 120 min; sorting out qualified products of 200 meshes by using a centrifugal separator, adding the qualified products into an ultrafine grinding machine with the rotating speed of 400r/min, continuously grinding for 60min, and sorting by using an ultrafine separator with the rotating speed of 100-150 r/min to finally obtain ultrafine powder with the specific surface area of 710-730 m2/kg。
Example 2
The vanadium-titanium slag superfine powder admixture of the embodiment is prepared by washing slag 3-4 times with industrial water at 20 +/-1 ℃ until the washing liquid is clear, and drying the material at 105-110 ℃ until the moisture of the material is reduced<1%, removing magnetic mineral components by an iron remover; adding 0.5% triethanolamine amine grinding aid, and grinding 0-10 mm slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 470-490 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 150 min; the centrifugal powder separator separates qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine to be continuously ground for 90min at the rotating speed of 400r/min, and after the qualified products are separated by the ultrafine powder separator at the rotating speed of 100-150 r/min, the specific surface area of the finally obtained ultrafine powder is 780-800 m2/kg。
Example 3
The vanadium-titanium slag superfine powder admixture of the embodiment is prepared by washing slag 3-4 times with industrial water at 20 +/-1 ℃ until the washing liquid is clear, and drying the material at 105-110 ℃ until the moisture of the material is reduced<1%, removing magnetic mineral components by an iron remover; adding a composite grinding aid of '0.3% triethanolamine + 0.2% glycerol', and grinding 0-10 mm of slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 430-470 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 180 min; the centrifugal separator separates qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine with the rotating speed of 300r/min for continuous grinding for 90min, and after the qualified products are separated by the ultrafine separator with the rotating speed of 100-150 r/min, the specific surface area of the finally obtained ultrafine powder is 700-750 m2/kg，SO3The content is less than or equal to 0.50 percent, and the content of chloride ions is less than or equal to 0.04 percent.
Comparative example 1
The vanadium-titanium slag superfine powder admixture of the comparative example is prepared by washing slag 3-4 times by using industrial water at 20 +/-1 ℃ until washing liquid is clear, and drying the material at 105-110 ℃ until the moisture of the material is reduced<1 percent, adding 0.5 percent triethanolamine grinding aid, and grinding the powder into powder with the specific surface area of 450-500 m by using a 5kg common experimental ball mill for 0-10 mm slag raw material2The rotation speed is set to be 10-20 r/min, and the grinding time is 250 min; the centrifugal separator separates qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine with the rotating speed of 300r/min and need to be continuously ground for 150min, and after the qualified products are separated by the ultrafine separator with the rotating speed of 100-150 r/min, the superfine powder with the specific surface area of 700-750 m is finally obtained2/kg。
Through analyzing the experimental data of the example 1 and the comparative example 1, the difficult-grinding phase separation treatment process is found to directly influence the grinding time of the two-stage ball mill, the grinding time of the vanadium-titanium slag after separation is greatly shortened, and the grinding efficiency is obviously improved.
Comparative example 2
The vanadium-titanium slag superfine powder admixture of the comparative example is prepared by washing slag 3-4 times by using industrial water at 20 +/-1 ℃ until washing liquid is clear, and drying the material at 105-110 ℃ until the moisture of the material is reduced<1% iron remover for removing magnetic mineral groupDividing; adding a composite grinding aid of '0.3% triethanolamine + 0.2% glycerol', and grinding 0-10 mm of slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 430-470 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 180 min; the centrifugal separator separates qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine with the rotating speed of 100r/min for continuous grinding for 250min, and the ultrafine products are separated by the ultrafine separator with the rotating speed of 100-150 r/min to finally obtain ultrafine powder with the specific surface area of 700-750 m2/kg。
Through analyzing the experimental data of the embodiment 3 and the comparative example 2, it is found that the increase of the rotation speed of the ultrafine grinding mill is helpful for shortening the grinding time, thereby greatly improving the grinding efficiency of the ultrafine vanadium-titanium slag powder.
Comparative example 3
The vanadium-titanium slag superfine powder admixture of the comparative example is dried at the temperature of 105-110 ℃ until the moisture of the materials<1%, removing magnetic mineral components by an iron remover; adding a composite grinding aid of '0.3% triethanolamine + 0.2% glycerol', and grinding 0-10 mm of slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 430-470 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 180 min; the centrifugal separator separates qualified products of 200 meshes, the qualified products are added into an ultrafine grinding machine with the rotating speed of 100r/min for continuous grinding for 250min, and the ultrafine products are separated by the ultrafine separator with the rotating speed of 100-150 r/min to finally obtain ultrafine powder with the specific surface area of 700-750 m2/kg，SO3The content is more than or equal to 2.50 percent, and the content of chloride ions is more than or equal to 0.20 percent. .
By analyzing the experimental data of the example 3 and the comparative example 3, the vanadium-titanium superfine powder admixture of the cement pretreatment process is beneficial to greatly reducing the SO3The content and the chloride ion content of the slag powder meet the standard regulation limit of GB/T18046-2017 'granulated blast furnace slag powder for cement, mortar and concrete'.
TABLE 1 Activity index of vanadium-titanium slag ultrafine powders of different specific surface areas
| Specific surface area/(m)2/kg) | 500 | 600 | 700 | 800 |
| 7d Activity index/%) | 80～87 | 88～92 | 92～95 | 95～98 |
| 28d Activity index/%) | 90～98 | 92～100 | 100～108 | 105～110 |
Table 1 shows the activity indexes of vanadium-titanium slag micropowder 7d and 28d with different specific surface areas, and it can be seen from the data in Table 1 that the reaction activity increases with the increase of the specific surface area of the vanadium-titanium slag micropowder. The finer the vanadium-titanium slag is ground in a certain range, the higher the activity of the vanadium-titanium slag is, and the contribution to the strength of cement is larger.
TABLE 2 technical parameters of ultrafine powder of vanadium-titanium slag
The vanadium-titanium slag superfine powder is tested according to a test method specified in GB/T18046-2017 granulated blast furnace slag powder for cement, mortar and concrete, and a test result meets the technical requirement of standard S95 grade mineral powder. Table 2 shows the technical parameters of the ultrafine vanadium-titanium slag powder according to the embodiments and comparative examples of the present invention, and it can be seen from the data in table 2 that the content of the ultrafine vanadium-titanium slag glass exceeds 90%, which indicates that a large number of steamed bread peaks exist in the range of 22-38 °, and as a main source of the pozzolanic activity of the mineral admixture, the hydration activity of the vanadium-titanium slag can be greatly improved by a large number of glass bodies in a metastable state.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The preparation method of the vanadium-titanium slag superfine powder admixture is characterized by comprising the following steps: washing slag for 3-4 times by using industrial water at 20 +/-1 ℃ until washing liquid is clear, and drying the material at 105-110 ℃ until the material contains water<1%, removing magnetic mineral components by an iron remover; adding 0.5% triethanolamine grinding aid, and grinding 0-10 mm slag raw material by using a 5kg common experimental ball mill until the specific surface area of the powder is 470-490 m2The rotation speed is set to be 10-20 r/min, and the powder is ground for 150 min; the centrifugal powder separator separates out qualified products of 200 meshes, then the qualified products are added into an ultra-fine grinding machine to be continuously ground for 90min at the rotating speed of 400r/min, and the qualified products are separated by the ultra-fine powder separator at the rotating speed of 100-150 r/min to obtain the product with the specific surface area of 780-800 m2A/kg of ultrafine powder.
2. The vanadium-titanium slag ultrafine powder admixture prepared by the method according to claim 1, wherein the specific surface area of the vanadium-titanium slag ultrafine powder admixture is 780-800 m2Kg, mineral composition comprisesPerovskite, calcite, calcium silicate and quartz, wherein the density of the vanadium-titanium slag superfine powder admixture is 2.95-2.97 g/cm3The content of vitreous body is more than or equal to 93.0 percent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910993798.7A CN110606675B (en) | 2019-10-18 | 2019-10-18 | Vanadium-titanium slag superfine powder admixture and preparation method thereof |
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| CN201910993798.7A CN110606675B (en) | 2019-10-18 | 2019-10-18 | Vanadium-titanium slag superfine powder admixture and preparation method thereof |
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| CN110606675A CN110606675A (en) | 2019-12-24 |
| CN110606675B true CN110606675B (en) | 2022-03-15 |
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| CN111961355B (en) * | 2020-08-17 | 2021-05-04 | 西南石油大学 | Polymer-coated vanadium-titanium waste residue nano particle and preparation method thereof |
| CN115231842B (en) * | 2022-07-06 | 2023-06-20 | 四川省建筑科学研究院有限公司 | Industrial smelting slag composite mineral admixture and preparation method thereof |
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| CN101514088A (en) * | 2008-02-22 | 2009-08-26 | 陈加耘 | Finely ground high-titanium slag and fly ash composite high-performance concrete |
| CN102633447A (en) * | 2012-04-23 | 2012-08-15 | 王开玺 | Process method for preparing palletized blast-furnace titanium slag into active slag powder |
| CN103435278A (en) * | 2013-07-16 | 2013-12-11 | 西安建筑科技大学 | Method for improving hydration activity of steel slag |
| CN104478269A (en) * | 2014-11-05 | 2015-04-01 | 上海宝田新型建材有限公司 | Ultrafine slag powder, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514088A (en) * | 2008-02-22 | 2009-08-26 | 陈加耘 | Finely ground high-titanium slag and fly ash composite high-performance concrete |
| CN102633447A (en) * | 2012-04-23 | 2012-08-15 | 王开玺 | Process method for preparing palletized blast-furnace titanium slag into active slag powder |
| CN103435278A (en) * | 2013-07-16 | 2013-12-11 | 西安建筑科技大学 | Method for improving hydration activity of steel slag |
| CN104478269A (en) * | 2014-11-05 | 2015-04-01 | 上海宝田新型建材有限公司 | Ultrafine slag powder, and preparation method and application thereof |
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