CN1955135A - Method for quickly preparing quenched slag for cement concrete - Google Patents
Method for quickly preparing quenched slag for cement concrete Download PDFInfo
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- CN1955135A CN1955135A CN 200510030717 CN200510030717A CN1955135A CN 1955135 A CN1955135 A CN 1955135A CN 200510030717 CN200510030717 CN 200510030717 CN 200510030717 A CN200510030717 A CN 200510030717A CN 1955135 A CN1955135 A CN 1955135A
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Abstract
A process for fast preparing the water quenched slag used for cement concrete includes such steps as measuring the initial smelting temp, the temp of semi-spherical point and flowing temp of the raw materials containing TiO2, proportional mixing, loading in furnace while arranging a temp measuring thermocouple in it, smelting while controlling the smelting temp and stirring until full smelting, and pouring it in water pool.
Description
Technical field
The invention belongs to green technology and new material technology field, relate to industrial residue recycling and treatment technology.
Background technology
Molten blast furnace slag easily is bonded to hard bulk when slowly cooling off at normal temperatures, does not almost completely have hydraulically active, and can't carry out recycling easily greatly because of piece.The a lot of places of China all have a large amount of bulk slags to be discharged and pile up, and not only take up an area of, waste resource, but also caused the serious environmental pollution.But it is to be noted; some molten blast furnace slags are behind the shrend chilling; can make the thing phase composite major part of formation become vitreum; has higher chemical potential; under the condition that is stimulated, has hydraulically active; thereby this granulated bf slag can be used as cement mixture and is used for the operating mine slag portland cement, not only can reduce the Cement Production cost, and can increase substantially cement output.
Usually, the chemical ingredients as the blast furnace slag of cement mixture mainly is CaO, Al
2O
3, SiO
2, also have a spot of MgO, MnO, FeO, TiO
2Deng the low ordinary blast slag of foreign matter content, relative national standards has clear and definite restriction to the composition of the blast furnace slag that is used as cement mixture, in the blast furnace slag of some area or enterprise's discharging owing to contain a large amount of CaO, Al of removing
2O
3, SiO
2Impurity beyond the isoreactivity composition and almost do not have potential hydraulically active can significantly reduce cement intensity after mixing in the cement, and other performance of cement is also had very big disadvantageous effect, therefore can't well be utilized as cement mixture at cement industry.But, along with the raising of people to the understanding of recycling economy and industrial residue, increasing people and enterprise have recognized that industrial residue has just misplaced local potential resources, as long as strengthen research, by people's effort in a sustained way, will realize that in the near future the zero release and zero of most of industrial enterprise pollutes, really accomplish whole recyclings of solid waste, smelting enterprise is built into the ecological Industrial Area of Sustainable development with cement production enterprise.And the many industrial residues that utilized well of failing at present mainly are because people are to their understanding not enough, rather than their composition and forming is not suitable at cement industry really as the cement mixture utilization.And one of them very big reason is because the discharging enterprise of these industrial residues fails they are carried out effective Water Quenching, and its lateral reactivity can be discharged.In addition, do not consider effective utilization of waste residue in the production that the important reasons that some industrial residue fails to obtain utilizing as cement mixture is a smelting enterprise, if smelting enterprise can just adjust chemical ingredients consciously in Metal smelting is produced, recycling needs according to waste residue are adjusted composition, also just can solve the problem that a large amount of at present industrial residues that exist can not be utilized effectively, but this need study in advance, form with definite appropriate ingredients, but such research work also needs waste residue is carried out Water Quenching.In a word, be that industrial production or scientific research all need industrial residue is carried out Water Quenching, could obtain to have the granulated slag that cement mixture uses that can be used as of high hydraulically active like this.
That be used as cement mixture usually is TiO
2The ordinary blast slag that content is low, and contain a large amount of TiO in some blast furnace slag
2(22～26%), reduced the content of CaO, and major part has formed uhligite and titanaugite, therefore almost there is not potential hydraulically active, can significantly reduce cement intensity after mixing in the cement, other performance to cement also has a significant impact, thereby the comprehensive utilization situation of these blast furnace slags is undesirable so far.Mainly be that its resource value can not be fully used as backfilling material, roadbed bed course etc. at present.According to industry standard JC418-91 " the granulation blast furnace titanium slag that is used for cement " regulation, these blast furnace slags can only be used as nonactive blended material in manufacture of cement, and its volume is restricted.
Need to determine how many TiO
2During content, titanium-containing blast furnace slag can be used as cement mixture operating mine slag cement, and be unlikely to influence significantly the performance of slag cement, and make every effort to admixture titanium-containing blast furnace slag in cement as much as possible, cement production enterprise can be utilized in a large number to titanium-containing blast furnace slag.In addition, also must guarantee the shrend quality of slag, prepare high-quality different Ti O
2The water-quenched blast-furnace slag of content.
Summary of the invention
The object of the present invention is to provide a kind of method of the molten slag of shrend effectively, for the Water Quenching of most of molten slag provides a kind of method fast and effectively.
For achieving the above object, solution of the present invention is: a kind of quick preparation is used for the method for the water granulated slag of cement concrete, adopts following steps:
Measure different Ti O
2High temperature melting behaviours such as the initial melting temperature of content admixtion, hemisphere point temperature, trickling temperature;
With slag by proportioning take by weighing respectively, mixing, melt in the stove of packing into; Temperature thermocouple is settled at the furnace charge middle part, and according to slag temperature of fusion and interval in the measurement result control induction furnace of admixtion high-temperature fusion performance, stir on the fusing of margin limit;
After treating that admixtion melts fully, pour in the pond, rapid quench makes Water Quenching Slag.
Further, found different Ti O
2During the content admixtion, its Heating temperature should be controlled at corresponding temperature of fusion and melting region according to high-temperature fusion performance measurement result.
Water-solid ratio was more than or equal to 25: 1 during shrend system slag.
Be with the levigate mixing of admixtion in this determination step, make the right cylinder sample of Φ 3 * 5.Sample is placed on the ceramic plate of load sample rod, slowly shifts onto in the stove, specimen temperature is raised to 600～700 ℃, sample images on the screen, then sample is pushed the furnace high-temperature district, and sample begins fusing in the temperature-rise period, and scanner is noted the melting process of sample; When specimen height is original 75% the time, the temperature that computer writes down this moment automatically begins temperature of fusion as sample, when specimen height is original 50% the time, computer writes down the hemisphere point temperature of the temperature of this moment as sample automatically, when specimen height is original 25% the time, computer writes down the trickling temperature of the temperature of this moment as sample, melting region=trickling temperature-initial melting temperature automatically.
This fusing system slag step is with after high-titanium blast furnace slag and the oven dry of ordinary blast slag, takes by weighing a certain amount of high-titanium blast furnace slag and ordinary blast slag respectively by calculating proportioning, and mixing in the plumbago crucible of packing into, melts in medium-frequency induction furnace.
According to the present invention, not only can the industrial waste residue disposal of Water Quenching becomes water granulated slag to be used for cement-based material production with failing effectively at present, but also the present invention can be used for scientific research, for understanding and determining that the research work of suitable slag composition provides technical support.
Embodiment
Principle of the present invention is to utilize the on-the-spot blast furnace slag of factory, with addition of the ordinary blast slag with TiO
2Content is adjusted to each prescribed value, obtains different Ti O
2Behind the content admixtion, with its refuse and shrend system slag and get, be different Ti O
2The blast furnace slag of content is made raw material as the systematic study of cement mixture and is prepared.
The present invention is raw materials used to be the on-the-spot blast furnace slag of steel mill, uses chemical reagent such as calcium oxide, magnesium oxide, silicon-dioxide, aluminium sesquioxide when preparing the admixtion that detects high-temperature behavior.The on-the-spot blast furnace slag composition analytical results of steel mill is respectively as table 1, table 2.
High-titanium blast furnace slag composition analysis/the wt% of table 1 steel mill
| CaO | SiO 2 | MgO | Al 2O 3 | TiO 2 | FeO | Other | CaO/SiO 2 |
| 28.12 | 27.38 | 7.37 | 12.55 | 21.46 | 2.30 | 0.82 | 1.03 |
Table 2 steel mill ordinary blast slag ingredient is analyzed (%wt)
| CaO | SiO 2 | MgO | Al 2O 3 | FeO | Other | CaO/SiO 2 |
| 40.18 | 33.41 | 7.76 | 9.36 | 0.81 | 8.48 | 1.20 |
1.1 method
1.1.1 the mensuration of admixtion high-temperature behavior
On LZ-III slag pre-arcing characterisitics tester, measure different Ti O
2High temperature melting behaviours such as the initial melting temperature of content admixtion, hemisphere point temperature, trickling temperature.
With the levigate mixing of admixtion, make the right cylinder sample of Φ 3 * 5.Sample is placed on the ceramic plate of load sample rod, slowly shifts onto in the stove, specimen temperature is raised to 600～700 ℃, sample images on the screen, then sample is pushed the furnace high-temperature district, and sample begins fusing in the temperature-rise period, and scanner is noted the melting process of sample.When specimen height is original 75% the time, the temperature that computer writes down this moment automatically begins temperature of fusion as sample, when specimen height is original 50% the time, computer writes down the hemisphere point temperature of the temperature of this moment as sample automatically, when specimen height is original 25% the time, computer writes down the trickling temperature of the temperature of this moment as sample automatically.Melting region=trickling temperature-initial melting temperature.
1.1.2 fusing system slag
After high-titanium blast furnace slag and the oven dry of ordinary blast slag, take by weighing a certain amount of high-titanium blast furnace slag and ordinary blast slag respectively by calculating proportioning, mixing in the plumbago crucible of packing into, melts in the 150Kg medium-frequency induction furnace.Temperature thermocouple is settled at furnace charge middle part, and according to slag temperature of fusion and interval in the measurement result control induction furnace of admixtion high-temperature fusion performance, stir on the fusing of margin limit, treat that admixtion melts fully after, pour in the pond, rapid quench makes Water Quenching Slag.
1.1.3 Water Quenching Slag sreen analysis and material phase analysis
Analyze Water Quenching Slag size composition with the dry type sieve formula.Analyze the Water Quenching Slag thing mutually and crystallization degree with X-ray diffraction method and petrographic analysis method.
1.2 result
1.2.1 the proportioning of admixtion is calculated
The admixtion of imagination certainweight is formed by high-titanium blast furnace slag and the cooperation of common slag, so earlier according to different Ti O
2The preparation requirement of content is calculated the weight of the required high-titanium blast furnace slag of admixtion and is brought the content of the various compositions that come into, calculates the common slag weight that needs then and brings the content of the various compositions that come into, fixedly dual alkalinity CaO/SiO
2=1.1, adjust calcium oxide, magnesium oxide, silicon-dioxide, aluminium sesquioxide content with chemical reagent.Different Ti O
2The composition calculation result of content admixtion sees Table 3.Various different Ti O in the table 3
2The proportioning of content admixtion is calculated and is seen Table 4.The admixtion that high-temperature behavior is used is tested in proportioning calculation result preparation according to table 4.
Table 3 different Ti O
2Composition calculation result/the %wt of content admixtion
| Numbering | TiO 2 | CaO | SiO 2 | MgO | Al 2O 3 | Other |
| T3 T6 T9 T12 T15 T18 | 3 6 9 12 15 18 | 37.70 36.10 34.55 33.00 31.45 29.9 | 34.27 32.82 31.41 30.00 28.59 27.18 | 8.8 8.55 8.35 8.10 7.85 7.65 | 15.83 15.63 15.39 15.20 14.91 14.67 | 0.4 0.9 1.3 1.7 2.2 2.6 |
Table 4 different Ti O
2Proportioning calculating/the %wt of content admixtion
| Numbering | Blast furnace slag | CaO | SiO 2 | MgO | Al 2O 3 |
| T3 T6 T9 T12 T15 T18 | 14 28 42 56 70 84 | 30.05 28.15 23.20 17.25 12.30 6.50 | 30.70 25.00 20.30 14.65 9.95 4.25 | 7.75 6.45 5.20 4.00 2.75 1.40 | 13.5 12.40 9.30 8.10 5.0 3.85 |
1.2.2 the high-temperature behavior of admixtion
Various different Ti O
2The pre-arcing characterisitics temperature test result and the melting region of content admixtion see Table 5.By table 5 as seen, different Ti O
2The batch sample pre-arcing characterisitics temperature of content is substantially between 1200 ℃～1300 ℃, by CaO-Al
2O
3-SiO
2-TiO
2Quarternary phase diagram as can be known, different Ti O
2The admixtion of content roughly is in the low-temperature region of quaternary system.With TiO in the sample
2Content increases, and the variation of initial melting temperature, hemisphere point temperature, trickling temperature and melting region is fallen afterwards earlier and increased, at TiO
2Content be about 12% low ebb to occur.Therefore, found different Ti O
2During the content admixtion, its Heating temperature should be controlled at corresponding temperature of fusion and melting region according to high-temperature fusion performance measurement result.
The test result of the pre-arcing characterisitics temperature of each synthetic slag of table 5
| Numbering | The beginning temperature of fusion (℃) | Hemisphere point temperature (℃) | The trickling temperature (℃) | Melting region (℃) |
| T3 | 1250 | 1291 | 1302 | 52 |
| T6 | 1253 | 1259 | 1278 | 25 |
| T9 | 1227 | 1247 | 1255 | 28 |
| T12 | 1235 | 1236 | 1245 | 10 |
| T15 | 1242 | 1244 | 1257 | 13 |
| T18 | 1257 | 1267 | 1284 | 27 |
1.2.3 shrend system slag technology
Different Ti O
2The preparation of content blast furnace slag need be passed through high temperature melting, two steps of shrend system slag.
Choose TiO
2The admixtion of content 3% melts 5Kg at every turn in induction furnace, at water: carry out shrend Gu be respectively than (V/V) in 5: 1,10: 1,15: 1,20: 1,25: 1 the water, naturally cool to room temperature.Its size composition, thing phase and crystallization degree are detected in Water Quenching Slag oven dry back.The size composition of Water Quenching Slag when table 6 is different water-solid ratio.
The size composition of Water Quenching Slag during the different water-solid ratio of table 6
| Water-solid ratio | Size-grade distribution/% | |||||||
| ＞3mm | 3～ 0.90mm | 0.90～ 0.45mm | 0.45～ 0.18mm | 0.18～ 0.154mm | 0.154～ 0.125mm | 0.125～ 0.105mm | ＜0.105mm | |
| 5∶1 10∶1 15∶1 20∶1 25∶1 | 62.1％ 56.4％ 61.8％ 59.8％ 57.7％ | 21.8％ 21.3％ 19.9％ 18.8％ 20.3％ | 12.6％ 17.3％ 14.0％ 16.1％ 16.4％ | 2.6％ 2.9％ 3.2％ 3.6％ 3.8％ | 0.5％ 1.1％ 0.4％ 0.5％ 0.5％ | 0.2％ 0.7％ 0.2％ 0.3％ 0.4％ | 0.1％ 0.2％ 0.2％ 0.3％ 0.4％ | 0.1％ 0.2％ 0.4％ 0.5％ 0.7％ |
As seen from Table 6, along with the increase of water-solid ratio, the part of volume particle size is fewer and feweri in the Water Quenching Slag, and small grain size is partly more and more, so the specific surface area of Water Quenching Slag can increase gradually, and promptly the hydration activity of slag also increases.The blast furnace slag that water-solid ratio is respectively preparation in 5: 1,15: 1,25: 1 o'clock carries out the X-ray diffraction analysis and petrographic analysis shows, along with the increase of water-solid ratio, the vitrifying degree of blast furnace slag increases, and crystallization degree reduces.The increase of vitrifying degree, it helps the active raising of blast-furnace cement.When water-solid ratio was 5: 1, the speed of cooling of slag was slow after the shrend, and the vitrification phenomenon of slag is lighter; When water-solid ratio was 15: 1, the crystallization degree of blast furnace slag obviously reduced; When water-solid ratio was 25: 1, the vitrifying of blast furnace slag clearly almost completely formed vitreum.
As seen from the experiment, water-solid ratio must guarantee 〉=25: 1 during shrend system slag.
1.3 different Ti O
2The preparation of content blast furnace slag
Utilize on-the-spot high TiO
2Slag is pressed the proportioning of table 6, table 7 and is calculated, and admixture ordinary blast slag is prepared TiO
2Content is respectively 3%, 5%, 7%, 9%, 12%, 15%, 18% blast furnace slag.According to above-mentioned admixtion preparation and fusing, shrend system slag optimum process condition, prepared different Ti O
2Each 20Kg of the blast furnace slag of content.The actual constituent analysis such as the table 7 of gained Water Quenching Slag.
Table 7 different Ti O
2Content Water Quenching Slag chemical composition analysis result/%wt
| Numbering | TiO 2 | CaO | SiO 2 | MgO | Al 2O 3 | FeO | Basicity | Quality coefficient |
| T3 T5 T7 T9 T12 T15 T18 | 2.93 4.90 7.05 10.04 12.03 14.78 17.89 | 39.85 35.94 36.46 36.67 35.53 31.76 31.42 | 31.93 30.10 30.97 30.45 29.19 28.22 27.07 | 4.18 4.95 4.94 4.34 5.02 6.25 4.78 | 14.33 14.62 15.54 14.65 12.30 12.80 13.50 | 2.42 3.25 2.32 1.98 3.89 4.38 4.12 | 1.25 1.19 1.18 1.20 1.22 1.13 1.16 | 1.67 1.61 1.50 1.37 1.28 1.19 1.11 |
On the whole, the synthetic different Ti O of institute of the present invention
2The actual constituent of content blast furnace slag and the deviation of calculating composition are little, the basicity and the actual basicity basically identical of steel mill's blast furnace slag of synthetic blast furnace slag.
Claims (5)
1, a kind of quick preparation is used for the method for the water granulated slag of cement concrete, it is characterized in that adopting following steps:
Measure different Ti O
2High temperature melting behaviours such as the initial melting temperature of content admixtion, hemisphere point temperature, trickling temperature;
With slag by proportioning take by weighing respectively, mixing, melt in the stove of packing into; Temperature thermocouple is settled at the furnace charge middle part, and according to slag temperature of fusion and interval in the measurement result control induction furnace of admixtion high-temperature fusion performance, stir on the fusing of margin limit;
After treating that admixtion melts fully, pour in the pond, rapid quench makes Water Quenching Slag.
2, quick preparation according to claim 1 is used for the method for the water granulated slag of cement concrete, it is characterized in that: found different Ti O
2During the content admixtion, its Heating temperature should be controlled at corresponding temperature of fusion and melting region according to high-temperature fusion performance measurement result.
3, quick preparation according to claim 1 is used for the method for the water granulated slag of cement concrete, and it is characterized in that: water-solid ratio was more than or equal to 25: 1 during shrend system slag.
4, be used for the method for the water granulated slag of cement concrete according to arbitrary described quick preparation among the claim 1-3, it is characterized in that: be with the levigate mixing of admixtion in this determination step, make the right cylinder sample of Φ 3 * 5.Sample is placed on the ceramic plate of load sample rod, slowly shifts onto in the stove, specimen temperature is raised to 600～700 ℃, sample images on the screen, then sample is pushed the furnace high-temperature district, and sample begins fusing in the temperature-rise period, and scanner is noted the melting process of sample; When specimen height is original 75% the time, the temperature that computer writes down this moment automatically begins temperature of fusion as sample, when specimen height is original 50% the time, computer writes down the hemisphere point temperature of the temperature of this moment as sample automatically, when specimen height is original 25% the time, computer writes down the trickling temperature of the temperature of this moment as sample, melting region=trickling temperature-initial melting temperature automatically.
5, the method that is used for the water granulated slag of cement concrete according to arbitrary described quick preparation among the claim 1-3, it is characterized in that: this fusing system slag step is with after high-titanium blast furnace slag and the oven dry of ordinary blast slag, take by weighing a certain amount of high-titanium blast furnace slag and ordinary blast slag respectively by calculating proportioning, mixing, pack in the plumbago crucible, in medium-frequency induction furnace, melt.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028378A (en) * | 2022-06-24 | 2022-09-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing high-activity micro powder |
| CN116380599A (en) * | 2023-06-06 | 2023-07-04 | 江苏省沙钢钢铁研究院有限公司 | Preparation method and application of large-size nonmetallic inclusion |
-
2005
- 2005-10-26 CN CN 200510030717 patent/CN1955135A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115028378A (en) * | 2022-06-24 | 2022-09-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for preparing high-activity micro powder |
| CN116380599A (en) * | 2023-06-06 | 2023-07-04 | 江苏省沙钢钢铁研究院有限公司 | Preparation method and application of large-size nonmetallic inclusion |
| CN116380599B (en) * | 2023-06-06 | 2023-08-11 | 江苏省沙钢钢铁研究院有限公司 | Preparation method and application of large-size nonmetallic inclusion |
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