CN114350941A - Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent - Google Patents
Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent Download PDFInfo
- Publication number
- CN114350941A CN114350941A CN202210035239.7A CN202210035239A CN114350941A CN 114350941 A CN114350941 A CN 114350941A CN 202210035239 A CN202210035239 A CN 202210035239A CN 114350941 A CN114350941 A CN 114350941A
- Authority
- CN
- China
- Prior art keywords
- sintering
- nitrogen
- iron ore
- fossil fuel
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 59
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910011212 Ti—Fe Inorganic materials 0.000 title claims abstract description 49
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 25
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 22
- 239000000956 alloy Substances 0.000 claims abstract description 22
- 239000002803 fossil fuel Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 16
- 239000003546 flue gas Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000006227 byproduct Substances 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 13
- 239000010936 titanium Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for sintering iron ore by using Ti-Fe as a nitrogen fixing agent, which comprises the following steps of premixing fossil fuel and the nitrogen fixing agent in the material mixing process, and then participating in the sintering process together with other iron-containing materials and a fusing agent, wherein the nitrogen fixing agent is Ti-Fe alloy powder, and the mass ratio d of the fossil fuel to the Ti-Fe alloy powder in the material mixing process is as follows: (45-65): (0.4-1.2). After the Ti-Fe powder is added in the sintering process, the temperature of a sintering combustion layer can be reduced by 50-200 ℃, and the content of nitrogen oxides in sintering flue gas is reduced by 50-120mg/m by utilizing the catalytic decomposition effect of calcium ferrite on the nitrogen oxides3The method not only makes full use of the steel-making by-products and saves energy, but also achieves the purpose of reducing nitrogen oxides in the sintering flue gas.
Description
Technical Field
The invention belongs to the field of sintering, and particularly relates to a method for sintering iron ore by using Ti-Fe as a nitrogen fixing agent.
Background
In recent years, the development of the steel industry is rapid, the environmental pollution is increasingly prominent, and the pollutants in the sintering flue gas mainly comprise sulfides, nitrides and the like. At present, most of sintering processes are free of nitrogen oxide removing devices, the nitrogen oxide removing devices are used as main pollutants, the nitrogen oxide removing devices are mandatory in environmental monitoring at present, the nitrogen oxide removing devices are used as the main pollutants for detection, forced shutdown can be carried out if the nitrogen oxide removing devices exceed standards, sintering is used as a front-end process of an iron and steel process, the continuity of iron and steel production is directly influenced, and the continuity of sintering production is guaranteed to be key work of iron making production.
The method mainly comprises 2 control methods of reducing sintering nitrogen oxides mainly caused by fuel combustion and adopting low-temperature sintering and reducing atmosphere under the condition of not reducing the combustion consumption of sintering solids, wherein the reducing atmosphere can reduce secondary oxidation of nitrogen in fuel volatile matters so as to reduce NOx in sintering flue gas. Therefore, the technologies disclosed in the patent nos. CN201721708301.5 and CN201810065440.3 all use ammoniation to treat nitrogen oxides, and further, there are methods for treating NOx in sintering flue gas, such as microcrystalline method and activated carbon method, but these methods are to treat NOx that has already been generated, rather than to control the source and process, and currently, fuel control is performed on coal powder and coke powder used for sintering in the metallurgical industry, mainly using coal with low fuel consumption and low N content, but due to the factors of coal procurement and cost, there are few opportunities that can be practically selected by steel enterprises, and for this reason, methods such as reducing sintering temperature, reducing high temperature zone, adding catalyst, and maintaining reducing atmosphere are more adopted in the metallurgical industry, and patents CN201811161162.8 and CN201810361856.x of the university of anhui industry are focused on this.
Disclosure of Invention
The invention aims to overcome the problems and the defects and provide a method for sintering iron ore by using Ti-Fe as a nitrogen fixing agent, which makes full use of steelmaking byproducts, saves energy and achieves the aim of reducing nitrogen oxides in sintering flue gas.
The purpose of the invention is realized as follows:
the invention focuses on that the oxidation sequence of N and titanium is higher than that of N and oxygen, and simultaneously, the oxidation of metallic iron can release heat, so that the problem that the heat value of common low-N coal is low is solved.
A process for sintering iron ore by using Ti-Fe as nitrogen-fixating agent includes such steps as proportioning, mixing, granulating and sintering, and features that the fossil fuel and nitrogen-fixating agent are premixed and then mixed with other iron-contained material and flux. The method mainly utilizes the reaction of N and Ti in preference to N and O, and reduces the emission of NOx by reacting N in the fuel with nearby Ti-Fe once the N in the fuel is generated in the combustion process of fossil fuels such as coal powder, coke powder and the like, and simultaneously utilizes the characteristic that the fuel is premixed with Ti-Fe and fully contacted with the Ti-Fe to improve the nitrogen fixation effect of the Ti-Fe.
The nitrogen fixing agent is Ti-Fe alloy powder. On one hand, nitrogen fixation and emission reduction are realized by utilizing a Ti + N-TiN reaction, on the other hand, zero-valent iron is added, and the oxidation heat release is utilized, so that the sintering solid fuel consumption is reduced, and simultaneously, the emission reduction can be further realized.
In the burdening process, the mass ratio d of the fossil fuel to the Ti-Fe alloy powder is (40-65): (0.4-1.2). This is based on laboratory practical optimization and is closely related to the particle size of the sintering fuel. If the sintering fuel is too fine, the sintering speed is too high, the flame front temperature is too high, and the NOx content in the sintering flue gas is easy to increase, so that Ti-Fe is preferably added more to reduce the NOx emission. In addition, the more the sintering fuel, the higher the content of N in the volatile matter of the sintering fuel, and the higher the NOx content in the sintering flue gas, the more nitrogen fixing agent should be added to reduce NOx.
The fossil fuel is one or two of coke powder and coal powder, and the particle size of the fossil fuel is less than 5 mm. If the particle size ratio p of 1-3mm in the fossil fuel and the mass ratio d of the fossil fuel to the Ti-Fe alloy powder have the following relationship:
when p > 90%, d is: (45-65): (0.4-0.8);
when p is more than 80% and less than or equal to 90%, d is as follows: (45-65): (0.5-0.9);
when p is more than 70% and less than or equal to 80%, d is as follows: (45-65): (0.6-1.0);
when p is less than or equal to 70% and is less than or equal to 60%, d is: (45-65): (0.65-1.2).
Namely, the proportion of the Ti-Fe alloy powder is correspondingly increased by 10 to 15 percent when the proportion of the 1 to 3mm particle size composition in the fossil fuel is reduced by 10 percent.
The granularity of the Ti-Fe alloy powder is less than or equal to 3mm, wherein the mass percentage of Ti is not less than 30%, and the mass percentage of oxides in the alloy powder is not more than 5%. In order to ensure that the nitrogen fixing agent and the fuel have more sufficient contact area and the sintering permeability is not influenced by too fine particles, the particle size of Ti-Fe is less than 3mm through experimental optimization, and the higher the content of Ti in the Ti-Fe is, the better the nitrogen fixing effect is.
0.5-1kg/t of binder can be added in the mixing process, and the binder comprises 1 or more of bentonite, organic matter binder, starch, sodium silicate and the like. This is to better mix Ti-Fe with fuel and to make the nitrogen fixation effect more obvious.
The invention has the beneficial effects that:
after Ti-Fe powder is added in the sintering process, the temperature of a sintering combustion layer can be reduced by 50-200 ℃, and the content of nitrogen oxides in sintering flue gas is reduced by 50-120mg/m by utilizing the catalytic decomposition effect of calcium ferrite on the nitrogen oxides3The method not only makes full use of the steel-making by-products and saves energy, but also achieves the purpose of reducing nitrogen oxides in the sintering flue gas.
Detailed Description
The present invention is further illustrated by the following examples.
The embodiment of the invention carries out burdening, mixing and sintering according to the component proportion of the technical scheme.
The Ti-Fe alloy powders of the examples of the present invention have the compositions shown in Table 1. The sintering and batching scheme of the embodiment of the invention is shown in the table 2. The effect of premixing Ti-Fe and coke powder on NOx in the flue gas is shown in Table 3.
A process for sintering iron ore by using Ti-Fe as nitrogen-fixating agent includes such steps as proportioning, mixing, granulating and sintering, and features that the fossil fuel and nitrogen-fixating agent are premixed and then mixed with other iron-contained material and flux.
The nitrogen fixing agent is Ti-Fe alloy powder.
In the burdening process, the mass ratio d of the fossil fuel to the Ti-Fe alloy powder is as follows: (45-65): (0.4-1.2).
The fossil fuel is one or two of coke powder and coal powder, and the particle size of the fossil fuel is less than 5 mm.
If the particle size ratio p of 1-3mm in the fossil fuel and the mass ratio d of the fossil fuel to the Ti-Fe alloy powder have the following relationship:
when p > 90%, d is: (45-65): (0.4-0.8);
when p is more than 80% and less than or equal to 90%, d is as follows: (45-65): (0.5-0.9);
when p is more than 70% and less than or equal to 80%, d is as follows: (45-65): (0.6-1.0);
when p is less than or equal to 70% and is less than or equal to 60%, d is: (45-65): (0.65-1.2).
The granularity of the Ti-Fe alloy powder is less than or equal to 3mm, wherein the mass percentage of Ti is not less than 30%, and the mass percentage of oxides in the alloy powder is not more than 5%.
0.5-1kg/t of binder can be added during the mixing process, including 1 or more of bentonite, organic binder, starch, sodium silicate and other binders.
(one) preparing materials
Firstly, the alkalinity of a sintering ore is controlled to be 1.90, the MgO content is controlled to be 2.5%, and the FeO content in sintering is controlled to be about 9.0% by taking a batching structure required by actual production as a reference scheme, then, 0.4-1.2kg of Ti-Fe alloy powder is added into each ton of the sintering ore in an external batching mode to carry out a sintering experiment, and the optimal addition proportion of Ti-Fe fine powder within the range of 0-10% is obtained, wherein the components of the Ti-Fe alloy powder in the embodiment of the invention are shown in a table 1, and the formula kg (counted by each ton of the sintering ore) in the embodiment of the invention is shown in a table 2.
TABLE 1 composition (wt%) of Ti-Fe alloy powder of inventive example
| Examples | Ti | Fe |
| A# | 38.29 | 44.71 |
| B# | 42.8 | 37.6 |
| C# | 54.1 | 28.92 |
| D# | 62.3 | 17.4 |
TABLE 2 example sintering recipe kg (ton sinter basis) of the invention
(II) mixing-granulating
Firstly, mixing: in order to facilitate observation and adjustment of the water content of the mixture, a vertical stirring mixer is adopted for first mixing, and the cylinder and the stirrer rotate in opposite directions, so that the mixing effect is good.
1) Taking and weighing the iron material according to the proportioning scheme, and pouring the iron material into a mixer for mixing;
2) taking and weighing the dolomite and the coke powder, pouring the weighed dolomite and the coke powder into a test tray, manually premixing the weighed dolomite and the coke powder, and then pouring the weighed dolomite and the coke powder into a mixer to be mixed with the preliminarily mixed iron material;
3) and taking and weighing the quicklime, weighing a certain amount of water for digestion, uniformly mixing after digesting for 5 minutes, then pumping water to the mixture according to the moisture required by the test, continuously mixing, and finally discharging.
Mixing: mixing the first mixed material with a second mixing drum mixer for 3min
After granulation, samples were taken for water measurement (double sample method).
(III) sintering
The thickness of the sintering material layer is controlled to be 700mm, wherein the thickness of the bottom paving material is 40 mm-50 mm; the negative pressure 8290.8Pa is ignited for 120s, and the negative pressure 11720.8Pa is sintered.
After 2 times of sintering, the concentration of NOx in the flue gas is detected by a flue gas analyzer, and the influence result of premixing Ti-Fe and coke powder on the NOx in the flue gas is shown in Table 3.
From the results, in the beginning of the experiment, Ti-Fe concentrate is added as similar iron ore and is added after being mixed with the iron ore, but the effect is not obvious, and later, Ti-Fe powder and coke powder are premixed according to the reaction mechanism of Ti and C, so that the average concentration of NOx in sintering flue gas is reduced by about 10 ppm.
TABLE 3 Effect (ppm) of Ti-Fe and Coke powder premixing on NOx in flue gas
In order to express the present invention, the above embodiments are properly and fully described by way of examples, and the above embodiments are only used for illustrating the present invention and not for limiting the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made by the persons skilled in the relevant art should be included in the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (7)
1. A process for sintering iron ore by using Ti-Fe as nitrogen-fixating agent includes such steps as proportioning, mixing, granulating and sintering, and features that the fossil fuel and nitrogen-fixating agent are premixed and then mixed with other iron-contained material and flux.
2. The method for iron ore sintering using Ti-Fe as nitrogen fixation agent according to claim 1, wherein the nitrogen fixation agent is Ti-Fe alloy powder.
3. The method for sintering iron ore by using Ti-Fe as nitrogen fixing agent according to claim 2, wherein the mass ratio d of fossil fuel to Ti-Fe alloy powder is as follows: (45-65): (0.4-1.2).
4. The method for sintering iron ore by using Ti-Fe as nitrogen fixing agent according to claim 1, wherein the fossil fuel is one or two of coke powder and coal powder, and the particle size of the fossil fuel is less than 5 mm.
5. The method for iron ore sintering using Ti-Fe as nitrogen fixation agent according to claim 3, wherein if the 1-3mm particle size ratio p in the fossil fuel and the mass ratio d of the fossil fuel and Ti-Fe alloy powder have the following relationship:
when p > 90%, d is: (45-65): (0.4-0.8);
when p is more than 80% and less than or equal to 90%, d is as follows: (45-65): (0.5-0.9);
when p is more than 70% and less than or equal to 80%, d is as follows: (45-65): (0.6-1.0);
when p is less than or equal to 70% and is less than or equal to 60%, d is: (45-65): (0.65-1.2).
6. The method for iron ore sintering by using Ti-Fe as nitrogen fixing agent according to claim 2, characterized in that the grain size of the Ti-Fe alloy powder is less than or equal to 3mm, wherein the mass percentage of Ti is not less than 30%, and the mass percentage of oxide in the alloy powder is not more than 5%.
7. The method for sintering iron ore using Ti-Fe as nitrogen-fixing agent as claimed in claim 1, wherein 0.5-1kg/t of binder including 1 or more of bentonite, organic binder, starch, sodium silicate, etc. is added during the mixing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210035239.7A CN114350941A (en) | 2022-01-13 | 2022-01-13 | Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210035239.7A CN114350941A (en) | 2022-01-13 | 2022-01-13 | Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114350941A true CN114350941A (en) | 2022-04-15 |
Family
ID=81109887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210035239.7A Pending CN114350941A (en) | 2022-01-13 | 2022-01-13 | Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114350941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029169A (en) * | 2022-04-28 | 2022-09-09 | 鞍钢股份有限公司 | Preparation method of sintered solid fuel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0686700A2 (en) * | 1994-06-07 | 1995-12-13 | Metallgesellschaft Ag | Titanium containing additive and its use for increasing the durability of a furnace refractory lining or as a slag former |
| CN108823401A (en) * | 2018-05-28 | 2018-11-16 | 安徽工业大学 | A kind of method that Ore Sintering Process shunts granulation emission reduction NOX |
| CN108823402A (en) * | 2018-05-28 | 2018-11-16 | 安徽工业大学 | One kind is for emission reduction NO in sintering processXMethod for mixing |
| CN109402384A (en) * | 2018-12-26 | 2019-03-01 | 中天钢铁集团有限公司 | A method of sintering reduces NOx |
-
2022
- 2022-01-13 CN CN202210035239.7A patent/CN114350941A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0686700A2 (en) * | 1994-06-07 | 1995-12-13 | Metallgesellschaft Ag | Titanium containing additive and its use for increasing the durability of a furnace refractory lining or as a slag former |
| CN108823401A (en) * | 2018-05-28 | 2018-11-16 | 安徽工业大学 | A kind of method that Ore Sintering Process shunts granulation emission reduction NOX |
| CN108823402A (en) * | 2018-05-28 | 2018-11-16 | 安徽工业大学 | One kind is for emission reduction NO in sintering processXMethod for mixing |
| CN109402384A (en) * | 2018-12-26 | 2019-03-01 | 中天钢铁集团有限公司 | A method of sintering reduces NOx |
Non-Patent Citations (1)
| Title |
|---|
| 熊玮;廖继勇;毕学工;周国凡;: "脱除烧结烟气中NO_x的初步研究", 烧结球团 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029169A (en) * | 2022-04-28 | 2022-09-09 | 鞍钢股份有限公司 | Preparation method of sintered solid fuel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102101757A (en) | Industrial waste slag-doped composite silicate cement and production method thereof | |
| CN111471852B (en) | Method for sintering waste activated carbon powder, sintering mixture and sintered ore | |
| CN102491664A (en) | Modified steel slag composite admixture and preparation method thereof | |
| CN108070723A (en) | A kind of method of incineration of refuse flyash, municipal sludge and the metallurgy sintered recycling of Ferrous Metallurgy dedusting ash | |
| CN108070714A (en) | It is a kind of to utilize metallurgy sintered process sludge and the method for Ferrous Metallurgy dedusting ash | |
| CN114350941A (en) | Method for sintering iron ore by using Ti-Fe as nitrogen fixing agent | |
| CN111254277A (en) | Method for recycling ore blending of pellet waste desulfurization ash through back sintering | |
| CN101492626B (en) | Method for producing and using calcium based rare earth composite catalyst for accelerating pulverized coal burning | |
| CN113528812A (en) | Preparation method of wear-resistant alkaline pellets | |
| CN102230077B (en) | Mixture for producing sintering ores | |
| CN112063835A (en) | Method for treating iron-containing solid waste by using sintering process | |
| Que et al. | Reduction of NO x emission based on optimized proportions of mill scale and coke breeze in sintering process | |
| CN113549758A (en) | Sintered ore containing waste activated carbon and preparation method thereof | |
| CN113860763A (en) | Steel slag active exciting agent and active steel slag | |
| Chen et al. | NOx reduction in the sintering process | |
| CN110698093A (en) | Inorganic binder and preparation method thereof | |
| CN111455166B (en) | Pre-prepared material for reducing discharge amount of nitrogen oxides, production method thereof and sintering material | |
| CN114871240B (en) | Electrolytic manganese filter pressing slag for ammonia nitrogen removal and desulfurization as well as preparation method and application thereof | |
| Wang et al. | Process control technology of low NO x sintering based on coke pretreatment | |
| CN116926316A (en) | NO in sintering process x Emission reduction method of (2) and sintering mixture and preparation method of mixture | |
| CN114606035A (en) | Combustion improver composition for rotary kiln, preparation method and application thereof | |
| CN104193205A (en) | Modified coal gangue and preparation method thereof as well as low-chromium cement and preparation method of low-chromium cement | |
| CN117025943A (en) | Modified fuel for improving sintering technical index, preparation method and application | |
| CN115305300A (en) | Mixed fuel for sintering ingredients during switching period of full coke and full coal | |
| CN117625954A (en) | Method for reducing emission of nitrogen oxides and dioxins in sintering process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220415 |