CN104212944A - Hydrated desulfurizing agent and preparation method thereof - Google Patents
Hydrated desulfurizing agent and preparation method thereof Download PDFInfo
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- CN104212944A CN104212944A CN201410524416.3A CN201410524416A CN104212944A CN 104212944 A CN104212944 A CN 104212944A CN 201410524416 A CN201410524416 A CN 201410524416A CN 104212944 A CN104212944 A CN 104212944A
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- CN
- China
- Prior art keywords
- hydration
- reaction
- sweetening agent
- flyash
- magnesium slag
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 230000003009 desulfurizing effect Effects 0.000 title abstract description 3
- 238000006703 hydration reaction Methods 0.000 claims abstract description 59
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000011777 magnesium Substances 0.000 claims abstract description 34
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 33
- 239000010881 fly ash Substances 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 32
- 230000000996 additive effect Effects 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 18
- 235000003599 food sweetener Nutrition 0.000 claims description 47
- 239000003765 sweetening agent Substances 0.000 claims description 47
- 230000036571 hydration Effects 0.000 claims description 40
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid group Chemical group C(C(=O)O)(=O)O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 239000000376 reactant Substances 0.000 claims description 18
- 235000006408 oxalic acid Nutrition 0.000 claims description 10
- 230000035484 reaction time Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- -1 1~7 part Substances 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 13
- 230000023556 desulfurization Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000011575 calcium Substances 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 11
- 229910052791 calcium Inorganic materials 0.000 description 11
- 238000003723 Smelting Methods 0.000 description 3
- 239000005997 Calcium carbide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a hydrated desulfurizing agent and a preparation method thereof, belonging to the technical field of steel-making desulfurization. The technical problem to be solved by the invention is to provide a hydrated desulfurizer prepared from magnesium slag and fly ash. The hydrated desulfurizer of the invention is prepared by the following components by weight through hydration reaction: 80-95 parts of magnesium slag, 1-7 parts of fly ash and 0.1-1 part of additive. The hydrated desulfurizer prepared by adopting the magnesium slag and the fly ash as raw materials provides a new idea for high-value recycling of the magnesium slag and the fly ash, so that the magnesium slag and the fly ash are not wastes polluting the environment any more, are an effective production material in steelmaking production, and have good economic benefit and social benefit.
Description
Technical field
The present invention relates to hydration sweetening agent and preparation method thereof, belong to steel desulfurization technical field.
Background technology
Sweetening agent is requisite part in steel-smelting production process, and its mobility and desulfurization effect are to weigh the important indicator of its usefulness.The sweetening agent type that tradition is used has experienced quickened lime, soda ash, calcium carbide single kind sweetening agent and take calcium carbide or quickened lime as main, and (AD is Al to join Mg, AD
2o
3be called for short Al in AD
2o
3content is less, is generally 15～20%), CaF
2, CaCO
3, two stages of composite desulfurizing agent of making such as graphite.
At present, along with steel starting material significantly appreciate, steel market situation is growing more intense, how by taking effective means to reduce steel production cost, be a problem demanding prompt solution, and sweetening agent is one of important raw and processed materials of producing steel, how to reduce desulphurization cost, raise the efficiency, minimizing desulfurization unit consumption etc. has become the problem of necessary solution.Magnesium slag is also magnesium reduction slag, from magnesium-smelting plant, and the industrial residue of discharging while being production MAGNESIUM METAL, current can only stacking as waste.In recent years, China's magnesium smelting industry is fast-developing, and along with increasing year by year of former Magnesium and magnesium alloys annual production, the magnesium slag emitting is also more and more, and environment has been caused to great pressure.Flyash is from coal combustion, and a part can be used for building materials, and major part is still stored in ash.Therefore how to turn waste into wealth, research and develop a kind of low-cost high-efficiency sweetening agent extremely urgent.
Summary of the invention
The technical problem that the present invention solves is to provide the hydration sweetening agent that adopts magnesium slag and flyash to be prepared from.
Hydration sweetening agent of the present invention, is made through hydration reaction by the component of following weight part: 80～95 parts of magnesium slags, 1～7 part, flyash, 0.1～1 part of additive.
Further, preferably by the component of following weight part, through hydration reaction, made: 90.1 parts of magnesium slags, 4～6 parts, flyash, 0.5 part of additive.
Wherein, described additive is preferably oxalic acid.
As preferred version, the condition of described hydration reaction is: reaction pressure 0.2～5MPa, and 80～100 ℃ of temperature of reaction, the reaction times is at least 8h.
More preferably the condition of hydration reaction is: reaction pressure 1～4MPa, and 85～95 ℃ of temperature of reaction, the reaction times is 8h.
Further preferably the condition of hydration reaction is: reaction pressure 3MPa, and 90 ℃ of temperature of reaction, the reaction times is 8h.
Second technical problem that the present invention solves is to provide the preparation method of hydration sweetening agent of the present invention.
The preparation method of hydration sweetening agent of the present invention, comprises the following steps:
A, magnesium slag, flyash, additive and water are mixed, uniform reactant obtains being mixed;
B, reactant is carried out to hydration reaction, filter, obtain resultant;
C, resultant is dried, obtain hydration sweetening agent.
Wherein, after b step, resultant soaked, wash to the approaching neutrality of filtrate, after filtration, carry out c step.
Compared with prior art, the present invention has following beneficial effect:
1) adopting magnesium slag and flyash is the hydration sweetening agent that raw material prepares, for the high value of magnesium slag and flyash, recycle and proposed a kind of new thinking, making magnesium slag and flyash is no longer the waste of contaminate environment, and become a kind of effective production material in STEELMAKING PRODUCTION, there is good economic benefit and social benefit.
2) hydration sweetening agent of the present invention is good to the sweetening effectiveness of steel, and its desulfurization transformation efficiency can bring up to 34.7% by traditional 12.3%.
3) while adopting oxalic acid to be additive, its calcium transformation ratio is high, and while adding 0.5% oxalic acid, the calcium transformation ratio of hydration sweetening agent can reach 75.6%, adds other additive effects poor, and the calcium transformation ratio of hydration sweetening agent reaches at most 55.6%.
Embodiment
Sweetening agent of the present invention is to using magnesium slag and flyash solid waste as raw material, the Ca containing in magnesium slag
2siO
4with SiO in flyash
2, add the additive of respective amount, through solid-state building-up reactions, obtain, wherein, and by weight, 80～95 parts of magnesium slags, 1～7 part, flyash, 0.1～1 part of additive.
Sweetening agent preparation method of the present invention is fairly simple, and raw material is cheap and easy to get disposable, and energy consumption is low, and cost is low; Effective sweetening component of magnesium slag/flyash hydration sweetening agent is hydration ca aluminosilicate [(CaO) (SiO
2)
2(Al
2o
3) (H
2o)
4], calcium aluminate hydrates [(CaO)
3(Al
2o
3) (H
2o)
x]; Be suitable for anhydrous, middle temperature and in being unfavorable for gas-solid reaction environment, improve to a greater degree desulfurization rate and desulfuration efficiency.
After magnesium slag/flyash hydration reaction, the outside surface of fly ash grain has covered hydration sweetening agent layer equably, and the inside of fly ash grain is full of hole, when desulphurization reaction, sulfurous gas can spread from the surfaces externally and internally both direction of hydration sweetening agent layer simultaneously, and desulphurization reaction carries out more thorough.
Further, preferably by the component of following weight part, through hydration reaction, made: 90.1 parts of magnesium slags, 4～6 parts, flyash, 0.5 part of additive.
The conventional additive in this area all can be realized the present invention, and in order to improve the calcium transformation ratio of hydration sweetening agent of the present invention, additive is preferably oxalic acid.
Further, in order to improve the calcium transformation ratio of hydration sweetening agent of the present invention, the condition optimization of described hydration reaction is: reaction pressure 0.2～5MPa, and 80～100 ℃ of temperature of reaction, the reaction times is at least 8h.
Reaction pressure is the important factor of impact reaction, and pressure is too high or too low, all can not guarantee carrying out smoothly of reaction, therefore, the pressure of hydration reaction of the present invention selects 0.2～5MPa to be advisable, in order further to improve calcium transformation ratio, pressure is preferably 1～4MPa, more preferably 3MPa.Temperature of reaction is also the important factor of impact reaction, and temperature is too low, and reaction efficiency is low, and excess Temperature will waste energy, and increases cost, and therefore, temperature of reaction is 80～100 ℃ is advisable, and is preferably 85～95 ℃, more preferably 90 ℃.Hydration reaction time 8h and above all can, for cost-saving, improve reaction efficiency, the reaction times is preferably 8h.
The preparation method of hydration sweetening agent of the present invention, comprises the following steps:
A, magnesium slag, flyash, additive and water are mixed, uniform reactant obtains being mixed;
B, reactant is carried out to hydration reaction, filter, obtain resultant;
C, resultant is dried, obtain hydration sweetening agent.
Further, after b step, resultant soaked, wash to the approaching neutrality of filtrate, after filtration, carry out c step.
Concrete, hydration sweetening agent of the present invention can adopt following concrete technology to be prepared: magnesium slag and flyash solid waste, water are mixed with additive, and uniform reactant obtains being mixed, wherein, by weight, 80～95 parts of magnesium slags, 1～7 part, flyash, 0.1～1 part of additive; Reactant is under 0.2～5MPa, 90 ℃ of conditions, and reaction more than 8 hours, is filtered, and obtains resultant, if desired resultant is soaked, washs to the approaching neutrality of filtrate, filters, dries, and obtains sweetening agent.
Hydration sweetening agent of the present invention can be applicable in steel desulfurization.
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.
Embodiment 1
90.1kg magnesium slag, 5kg flyash, 0.5kg oxalic acid and water are mixed, the uniform reactant that obtains being mixed, reactant is under 3MPa, 90 ℃ of conditions, react 8 hours, filter, obtain resultant, resultant is soaked, washed to the approaching neutrality of filtrate, filters, dries, obtain hydration sweetening agent.
After testing, the calcium transformation ratio of this hydration sweetening agent is 75.6%, to the desulfurization transformation efficiency of steel, is 34.7%.
Embodiment 2
80kg magnesium slag, 7kg flyash, 0.1kg oxalic acid and water are mixed, the uniform reactant that obtains being mixed, reactant is under 0.2MPa, 80 ℃ of conditions, react 10 hours, filter, obtain resultant, resultant is soaked, washed to the approaching neutrality of filtrate, filters, dries, obtain hydration sweetening agent.
After testing, the calcium transformation ratio of this hydration sweetening agent is 71.6%, to the desulfurization transformation efficiency of steel, is 32.8%.
Embodiment 3
95kg magnesium slag, 1kg flyash, 1kg oxalic acid and water are mixed, the uniform reactant that obtains being mixed, reactant, under 1MPa, 100 ℃ of conditions, reacts 11 hours, filters, and obtains resultant, dries, and obtains hydration sweetening agent.
After testing, the calcium transformation ratio of this hydration sweetening agent is 70.4%, to the desulfurization transformation efficiency of steel, is 32.5%.
Embodiment 4
85kg magnesium slag, 4kg flyash, 0.7kg oxalic acid and water are mixed, the uniform reactant that obtains being mixed, reactant is under 5MPa, 95 ℃ of conditions, react 9 hours, filter, obtain resultant, resultant is soaked, washed to the approaching neutrality of filtrate, filters, dries, obtain hydration sweetening agent.
After testing, the calcium transformation ratio of this hydration sweetening agent is 68.7%, to the desulfurization transformation efficiency of steel, is 31.3%.
Embodiment 5
92kg magnesium slag, 6kg flyash, 0.4kg oxalic acid and water are mixed, the uniform reactant that obtains being mixed, reactant is under 4MPa, 85 ℃ of conditions, react 8 hours, filter, obtain resultant, resultant is soaked, washed to the approaching neutrality of filtrate, filters, dries, obtain hydration sweetening agent.
After testing, the calcium transformation ratio of this hydration sweetening agent is 74.4%, to the desulfurization transformation efficiency of steel, is 33.1%.
Claims (8)
1. hydration sweetening agent, is characterized in that, by the component of following weight part, through hydration reaction, is made: 80～95 parts of magnesium slags, 1～7 part, flyash, 0.1～1 part of additive.
2. hydration sweetening agent according to claim 1, is characterized in that, by the component of following weight part, through hydration reaction, is made: 90.1 parts of magnesium slags, 4～6 parts, flyash, 0.5 part of additive.
3. hydration sweetening agent according to claim 1 and 2, is characterized in that: described additive is oxalic acid.
4. according to the hydration sweetening agent described in claim 1～3 any one, it is characterized in that: the condition of described hydration reaction is: reaction pressure 0.2～5MPa, 80～100 ℃ of temperature of reaction, the reaction times is at least 8h.
5. hydration sweetening agent according to claim 4, is characterized in that: the condition of described hydration reaction is: reaction pressure 1～4MPa, and 85～95 ℃ of temperature of reaction, the reaction times is 8h.
6. hydration sweetening agent according to claim 4, is characterized in that: the condition of described hydration reaction is: reaction pressure 3MPa, and 90 ℃ of temperature of reaction, the reaction times is 8h.
7. the preparation method of the hydration sweetening agent described in claim 1～6 any one, is characterized in that, comprises the following steps:
A, magnesium slag, flyash, additive and water are mixed, uniform reactant obtains being mixed;
B, reactant is carried out to hydration reaction, filter, obtain resultant;
C, resultant is dried, obtain hydration sweetening agent.
8. the preparation method of hydration sweetening agent according to claim 7, is characterized in that: after b step, resultant soaked, wash to the approaching neutrality of filtrate, carry out c step after filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524416.3A CN104212944A (en) | 2014-10-08 | 2014-10-08 | Hydrated desulfurizing agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410524416.3A CN104212944A (en) | 2014-10-08 | 2014-10-08 | Hydrated desulfurizing agent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104212944A true CN104212944A (en) | 2014-12-17 |
Family
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|---|---|---|---|
| CN201410524416.3A Pending CN104212944A (en) | 2014-10-08 | 2014-10-08 | Hydrated desulfurizing agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185075A (en) * | 2020-01-15 | 2020-05-22 | 西安建筑科技大学 | Magnesium slag-based composite desulfurizer as well as preparation method and application thereof |
| CN112403216A (en) * | 2020-11-19 | 2021-02-26 | 榆林职业技术学院 | Method and device for flue gas desulfurization by using reduced magnesium slag |
-
2014
- 2014-10-08 CN CN201410524416.3A patent/CN104212944A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185075A (en) * | 2020-01-15 | 2020-05-22 | 西安建筑科技大学 | Magnesium slag-based composite desulfurizer as well as preparation method and application thereof |
| CN112403216A (en) * | 2020-11-19 | 2021-02-26 | 榆林职业技术学院 | Method and device for flue gas desulfurization by using reduced magnesium slag |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141217 |
|
| WD01 | Invention patent application deemed withdrawn after publication |