CN107572849A - The dechlorination method of metallurgical slag - Google Patents
The dechlorination method of metallurgical slag Download PDFInfo
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- CN107572849A CN107572849A CN201710947895.3A CN201710947895A CN107572849A CN 107572849 A CN107572849 A CN 107572849A CN 201710947895 A CN201710947895 A CN 201710947895A CN 107572849 A CN107572849 A CN 107572849A
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- metallurgical slag
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Abstract
The present invention relates to the dechlorination method of metallurgical slag, belong to metallurgical engineering field.The technical problems to be solved by the invention are to provide the dechlorination method of metallurgical slag, and this method comprises the following steps：Metallurgical slag is taken, adds alkali lye stirring, filtering, filter residue adds water stirring, filters, produce；Contain Cl in the metallurgical slag―., can be by Cl using dechlorination method of the present invention―Content is reduced to less than 0.06%, reaches building trade to Cl―The requirement of content, dechlorinate excellent.The inventive method dechlorination speed is fast, and process equipment is simple, simple to operate, and energy consumption is low, is had broad application prospects in metallurgical industry.
Description
Technical field
The present invention relates to the dechlorination method of metallurgical slag, belong to metallurgical engineering field.
Background technology
China's smelter discharges 1.53 hundred million tons of solid waste every year, metallurgical slag therein (including slag, ferroalloy slag
And nonferrous metallurgy slag etc.), annual yield is 67,000,000 tons.At present, China's slag mainly for the production of slag cement, make road
Base material and asphalt concrete pavement material etc.；Cement and concrete admixture can be made after manganese slag water quenching；Metal magnesium slag
Cement and concrete admixture can be made；Cement and concrete admixture can be made after silicon manganese slag water quenching；Ferrochrome slag can be mixed as concrete
Close material；Copper ashes can make masonry cement after water quenching, make mortar and aggregate instead of yellow ground.Above-mentioned metallurgical slag can be used for mostly
Cement admixture and aggregate, have broad application prospects in architectural engineering.
According to GB50164-1992《Standard for quality control of concrete》Regulation, Cl in concrete―The limit value of content is
0.06%.For some Cl―Content is high, the metallurgical slag especially obtained after superchlorination is handled, directly applies in concrete
Still by considerable restraint.
Therefore it provides a kind of dechlorination method of metallurgical slag, will wherein Cl―Content is reduced to less than 0.06%, to metallurgical slag
Application in architectural engineering is significant.
The content of the invention
It is an object of the invention to provide the dechlorination method of metallurgical slag.
The invention provides the dechlorination method of metallurgical slag, comprise the following steps：Metallurgical slag is taken, alkali lye stirring is added, filters,
Filter residue adds water stirring, filtering, produces；Contain Cl in the metallurgical slag―。
Metallurgical slag of the present invention, can contain Cl caused by metallurgical industry―Waste material or contain Cl―Metallurgy
Raw material or intermediate product.
Cl in metallurgical slag of the present invention―, exist in the form of water-soluble villaumite.
Further, FeO, Fe are contained in the metallurgical slag2O3、SiO2、Al2O3, it is one or two kinds of in CaO, MgO or TiC
Composition above.
Further, the metallurgical slag obtains by chloride process.
Further, described metallurgical slag is titanium slag.
Preferably, described metallurgical slag is the titanium extraction tailings that high temperature cabonization-cryogenic selective chloride process obtains.
" high temperature cabonization-cryogenic selective chlorination " technique is to utilize electric furnace by the steel climbing high slag containing titanium dioxide
(TiO2Content is 20%~26%) carbonization treatment is carried out at high temperature, the titanium dioxide of wherein most is transformed into carbonization
Titanium, form blast furnace carbide slag；Then it is anti-with chlorine in boiling chloridizing furnace as chlorizated raw material after carbide slag cooling is crushed
Should, the titanium carbide in carbide slag is transformed into TiCl at low temperature4, while control the impurity such as the calcium and magnesium in slag to enter as few as possible
Enter chlorizate, realize titanium in blast furnace slag recovery (referring to：Lu Ping steel climbing high slags comprehensive utilization study on the industrialization progress and
Analysis on Prospect [J] steel vanadium titaniums, 2013,34 (3):33-38.).It is most of in carbide slag after cryogenic selective chlorination
Composition eventually enter into titanium extraction tailings, contain CaO, SiO in titanium extraction tailings2And Al2O3Deng composition, also contain substantial amounts of chlorine in addition
Ion, its Exemplary chemical composition are as shown in the table：
The titanium extraction tailings Exemplary chemical composition (%w/w) of table 1
Further, Cl in the metallurgical slag―Content is 2~5%w/w.
Further, the mass fraction of alkali is 1~10% in the alkali lye.
Further, the volume mass ratio of the alkali lye and metallurgical slag is (1~5):1.
Preferably, the volume mass ratio of the alkali lye and metallurgical slag is 3：1.
Further, it is 20~90min to add alkali lye mixing time.
Preferably, it is 30min to add alkali lye mixing time.
Further, the alkali lye is the aqueous solution of sodium hydroxide and/or potassium hydroxide.Inventor by attempt find,
The dechlorination effect of calcium hydroxide and sodium carbonate is not so good as sodium hydroxide/potassium.
Further, the volume mass of water and metallurgical slag ratio is (3~6)：1.
Preferably, the volume mass of water and metallurgical slag ratio is 4：1.
Further, water is added to stir 3~10min.
Preferably, water is added to stir 5~10min.
, can be by Cl by first alkali cleaning, the operational sequence washed again the invention provides the dechlorination method of metallurgical slag―Contain
Amount is reduced to less than 0.06%, reaches building trade to Cl―The requirement of content, dechlorinate excellent.The inventive method dechlorination speed
Degree is fast, and process equipment is simple, simple to operate, and energy consumption is low, is had broad application prospects in metallurgical industry.
Embodiment
The raw material that is used in the specific embodiment of the invention, equipment are known product, are obtained by buying commercially available prod.
The present invention uses GB/T50344-2004《Building structure inspection technical standard》Method therefor carries out Cl in appendix C―The inspection of content
Survey.
The present invention removes the Cl in metallurgical slag by the following method―：Metallurgical slag is taken, adds alkali lye stirring, filtering, filter residue is again
Add water to stir, filter, produce.
Inventor is had found in actual production by continuously attempting to, and helps to destroy using alkaline aqueous solution washing metallurgical slag
It is wrapped in Cl―The impurity of surrounding, then by washing, Cl can be made―It is washed thoroughly clean.
At present, have been reported that using multi-stage water wash-calcining, mashing-natural subsidence-return in the methods of kiln is calcined removing metallurgical slag
Cl―, but the most complex operation of these methods, it is time-consuming longer, the defects of obvious be present.At present, there is not yet removing Cl by alkali cleaning―
Relevant report.
Embodiment 1 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydrate aqueous solution that the titanium extraction tailings 100g that mass fraction is 2~5% is 2% with mass fraction
500ml is mixed, and is stirred 30min, is then filtered using vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then 400ml water is added
Secondary washing is carried out, mixing time is controlled in 5~10min, then filtered using vacuum pump pressure.Handled by above step
Titanium extraction tailings, its Cl―Content is down to less than 0.048%.
Embodiment 2 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydrate aqueous solution that the titanium extraction tailings 1kg that mass fraction is 2~5% is 3.3% with 1L mass fractions
Mixing, 30min is stirred, is then filtered using vacuum pump pressure, obtains alkali cleaning titanium extraction tailings.Then the water progress for adding 4L is secondary
Washing, mixing time are controlled in 5~10min, then filtered using vacuum pump pressure.Titanium tail is carried by what above step was handled
Slag, its Cl―Content is down to 0.009%.
Embodiment 3 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydrate aqueous solution that the titanium extraction tailings 1kg that mass fraction is 2~5% is 3.3% with 3L mass fractions
Mixing, 30min is stirred, is then filtered using vacuum pump pressure, obtains alkali cleaning titanium extraction tailings.Then the water progress for adding 4L is secondary
Washing, mixing time are controlled in 5~10min, then filtered using vacuum pump pressure.Titanium tail is carried by what above step was handled
Slag, its Cl―Content is down to 0.035%.
Embodiment 4 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydroxide water that the titanium extraction tailings 100g that mass fraction is 2~5% is 3.3% with 300mL mass fractions
Solution mixes, and stirs 20min, is then filtered using vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then 400mL water is added
Secondary washing is carried out, mixing time is controlled in 5~10min, then filtered using vacuum pump pressure.Handled by above step
Titanium extraction tailings, its Cl―Content is down to 0.052%.
Embodiment 5 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydroxide water that the titanium extraction tailings 100g that mass fraction is 2~5% is 3.3% with 300mL mass fractions
Solution mixes, and stirs 90min, is then filtered using vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then 400mL water is added
Secondary washing is carried out, mixing time is controlled in 5~10min, then filtered using vacuum pump pressure.Handled by above step
Titanium extraction tailings, its Cl―Content is down to 0.018%.
Embodiment 6 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydroxide water that the titanium extraction tailings 100g that mass fraction is 2~5% is 3.3% with 300mL mass fractions
Solution mixes, and stirs 30min, is then filtered using vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then 300mL water is added
Secondary washing is carried out, mixing time is controlled in 5~10min, then filtered using vacuum pump pressure.Handled by above step
Titanium extraction tailings, its Cl―Content is down to 0.035%.
Embodiment 7 is dechlorinated using the inventive method to titanium extraction tailings
Containing Cl―The sodium hydroxide water that the titanium extraction tailings 100g that mass fraction is 2~5% is 3.3% with 300mL mass fractions
Solution mixes, and stirs 30min, is then filtered using vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then 600mL water is added
Secondary washing is carried out, mixing time is controlled in 5~10min, then filtered using vacuum pump pressure.Handled by above step
Titanium extraction tailings, its Cl―Content is down to 0.017%.
Comparative example 1 is dechlorinated by washing to titanium extraction tailings
Containing Cl―The titanium extraction tailings 100g that mass fraction is 2~5% mixes with the 300mL aqueous solution, stirs 30min, then makes
Filtered with vacuum pump pressure, obtain alkali cleaning titanium extraction tailings.Then the water for adding 400mL carries out secondary washing, mixing time control
In 5~10min, then filtered using vacuum pump pressure.The titanium extraction tailings handled by above step, its Cl―Content is down to
0.251%.
Claims (10)
1. the dechlorination method of metallurgical slag, it is characterized in that：Comprise the following steps：Metallurgical slag is taken, adds alkali lye stirring, filtering, filter residue
Stirring is added water, filters, produces；Contain Cl in the metallurgical slag―。
2. dechlorination method as claimed in claim 1, it is characterized in that：Contain FeO, Fe in the metallurgical slag2O3、SiO2、Al2O3、
One or more kinds of composition in CaO, MgO or TiC.
3. dechlorination method as claimed in claim 1 or 2, it is characterized in that：The metallurgical slag obtains by chloride process.
4. the dechlorination method as described in claims 1 to 3 any one, it is characterized in that：Described metallurgical slag is titanium slag；It is preferred that
Ground, described metallurgical slag are the titanium extraction tailings that high temperature cabonization-cryogenic selective chloride process obtains.
5. dechlorination method as claimed in claim 1, it is characterized in that：Meet at least one of following：
Cl in the metallurgical slag―Exist in the form of water-soluble villaumite；
Cl in the metallurgical slag―Content is 2~5%w/w.
6. dechlorination method as claimed in claim 1, it is characterized in that：The mass fraction of alkali is 1~10% in the alkali lye.
7. dechlorination method as claimed in claim 1, it is characterized in that：The volume mass ratio of the alkali lye and metallurgical slag for (1~
5):1；Preferably 3：1.
8. dechlorination method as claimed in claim 1, it is characterized in that：It is 20~90min to add alkali lye mixing time；Preferably
30min。
9. the dechlorination method as described in any one in claim 1 and 6~8, it is characterized in that：The alkali lye is sodium hydroxide
And/or the aqueous solution of potassium hydroxide.
10. dechlorination method as claimed in claim 1, it is characterized in that：Meet at least one of following：
The volume mass of water and metallurgical slag ratio is (3~6)：1；
Preferably, the volume mass of water and metallurgical slag ratio is 4：1；
Water is added to stir 3~10min；
Preferably, water is added to stir 5~10min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112279530A (en) * | 2020-11-25 | 2021-01-29 | 重庆大学 | Waste heat modification method of high-chlorine smelting waste residue |
| CN115180850A (en) * | 2022-07-14 | 2022-10-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dechlorinating titanium extraction tailings and recycling, titanium extraction tailings micro powder and composite micro powder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016598A (en) * | 2014-06-20 | 2014-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method of titanium extraction tailings |
| CN105385855A (en) * | 2015-11-17 | 2016-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method for chlorination process titanium extracting tailing slag |
-
2017
- 2017-10-12 CN CN201710947895.3A patent/CN107572849A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016598A (en) * | 2014-06-20 | 2014-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method of titanium extraction tailings |
| CN105385855A (en) * | 2015-11-17 | 2016-03-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method for chlorination process titanium extracting tailing slag |
Non-Patent Citations (1)
| Title |
|---|
| 姚虎卿等: "《脱氯剂》", 《适用技术市场》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112279530A (en) * | 2020-11-25 | 2021-01-29 | 重庆大学 | Waste heat modification method of high-chlorine smelting waste residue |
| CN115180850A (en) * | 2022-07-14 | 2022-10-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dechlorinating titanium extraction tailings and recycling, titanium extraction tailings micro powder and composite micro powder |
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