CN116891915A - Novel blast furnace injection promoter - Google Patents
Novel blast furnace injection promoter Download PDFInfo
- Publication number
- CN116891915A CN116891915A CN202310748176.4A CN202310748176A CN116891915A CN 116891915 A CN116891915 A CN 116891915A CN 202310748176 A CN202310748176 A CN 202310748176A CN 116891915 A CN116891915 A CN 116891915A
- Authority
- CN
- China
- Prior art keywords
- blast furnace
- coke
- mno
- combustion
- coal
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- 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.)
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- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 239000003245 coal Substances 0.000 claims abstract description 28
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 24
- 239000000571 coke Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002817 coal dust Substances 0.000 abstract description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 4
- 150000002978 peroxides Chemical class 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 3
- 230000023556 desulfurization Effects 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 230000008093 supporting effect Effects 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 abstract description 2
- 239000000395 magnesium oxide Substances 0.000 description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- SPAGIJMPHSUYSE-UHFFFAOYSA-N Magnesium peroxide Chemical compound [Mg+2].[O-][O-] SPAGIJMPHSUYSE-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229960004995 magnesium peroxide Drugs 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 229910052810 boron oxide Inorganic materials 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004343 Calcium peroxide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000510672 Cuminum Species 0.000 description 1
- 235000007129 Cuminum cyminum Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 1
- 235000019402 calcium peroxide Nutrition 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a novel blast furnace injection promoter, which comprises the following raw materials in parts by weight: mnO (MnO) 2 28‑38，Fe 2 O 3 10‑15，B 2 O 3 2‑6，CaO 2 18‑23，MgO 2 8‑12，SiO 2 20-30 wt%, K+Na+Zn is less than or equal to 0.15 wt%. The invention expands the application fields and the application occasions of peroxide and boride, and can fully utilize and exert the performance and the value of various additives. The novel blast furnace injection promoter belongs to a composite additive, and is injected into a blast furnace by means of a coal injection system and blast furnace coal injection, and the initial stage of entering the blast furnace has the effects of improving and improving the combustion performance of the blast furnace coal injection, promoting the full combustion of coal dust and improving the combustion rate; the product after combustion supporting along with the reaction has good dispersion effect, and can assist in desulfurization and sulfur fixation; in addition, the adhesive can be well adhered to the surface of the coke to passivate the coke and reduce the reaction of the cokeThe thermal strength of the coke is improved, and the skeleton effect of the coke is enhanced.
Description
Technical Field
The invention relates to the technical field of blast furnace injection, in particular to a novel blast furnace injection promoter.
Background
Along with the industrial upgrading of the steel industry, the requirements on the intelligent and green development of steel are higher and higher, a green and low-cost road is required to be taken out of a steel plant, the coke ratio of a blast furnace coal injection structure is further optimized, the comprehensive fuel ratio is reduced, and lower comprehensive emission becomes the primary target of steel enterprises. Optimizing the coal injection and blending structure of the blast furnace, improving the combustion rate of pulverized coal and reducing the necessary way of fuel consumption, not only can reduce the iron-making cost, but also can reduce the use of coking and reduce the comprehensive emission of steel.
The method aims at reducing the comprehensive fuel ratio of the blast furnace, improving the coal injection proportion of the blast furnace, promoting the coal injection combustion efficiency, enhancing the thermal strength of coke and improving the framework supporting effect of the coke, and is always the target required by a blast furnace worker, namely cumin. According to the characteristics of the coal powder injected by the blast furnace, a proper amount of accelerator is added into the coal powder to promote the combustion of the coal powder, improve the coal injection ratio and reduce the coke consumption and the comprehensive fuel ratio.
Disclosure of Invention
The novel blast furnace injection promoter belongs to a composite additive, and is injected into a blast furnace by means of a coal injection system and blast furnace coal injection, and the initial stage of entering the blast furnace has the effects of improving and improving the combustion performance of the blast furnace coal injection, promoting the full combustion of coal dust and improving the combustion rate; the product after combustion supporting along with the reaction has good dispersion effect, and can assist in desulfurization and sulfur fixation; in addition, the adhesive can be well adhered to the surface of the coke, so that the coke is passivated, the reactivity of the coke is reduced, the thermal strength of the coke is improved, and the framework effect of the coke is enhanced.
The invention aims to solve the defects in the prior art, and provides a composite accelerator which expands the application fields and the use occasions of various oxides (peroxides) and can more fully utilize the value of the oxides, and has the effects of accelerating the combustion of coal dust and passivating coke.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the novel blast furnace injection promoter comprises the following raw materials in parts by weight: mnO (MnO) 2 28-38，Fe 2 O 3 10-15，B 2 O 3 2-6，CaO 2 18-23，MgO 2 8-12，SiO 2 20-30，K+Na+Zn≤0.15。
As a preferable technical scheme of the invention, mnO 2 ，Fe 2 O 3 ，SiO 2 ，B 2 O 3 ，CaO 2 ，MgO 2 The fineness is required to be below 200 meshes.
As a preferable technical scheme of the invention, mnO 2 ，Fe 2 O 3 ，SiO 2 ，B 2 O 3 ，CaO 2 ，MgO 2 The weight is 80-90% of the total weight of the accelerator.
A preparation method of a novel blast furnace injection promoter comprises the following steps:
1. weighing CaO as a raw material 2 ，MnO 2 ，Fe 2 O 3 ，MgO 2 ，SiO 2 Grinding to below 200 meshes;
2. screening and grinding qualified raw materials, mixing, and mechanically stirring for 15-20min;
3. bagging according to fixed weight for standby.
As a preferable technical scheme of the invention, the accelerator is 0.3% -0.6% of the total amount of the coal powder.
The beneficial effects are that:
1. the application fields and the use occasions of various oxides and peroxides are expanded, and the value of the oxides and the peroxides can be fully utilized.
2. The accelerator is produced mainly by mechanical mixing, the adding process is simple, secondary pollution is avoided, and the application range is wide.
3. Has the composite accelerator with the function of accelerating the combustion of coal dust and passivating coke.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
the novel blast furnace injection promoter comprises the following raw materials in parts by weight: caO (CaO) 2 20，MnO 2 28，Fe 2 O 3 12，MgO 2 8，B 2 O 3 4，SiO 2 20。
As a preferable technical scheme of the invention, caO 2 ，MnO 2 ，Fe 2 O 3 ，MgO 2 ，SiO 2 The fineness requirement is 180 meshes.
As a preferable technical scheme of the invention, mnO 2 ，Fe 2 O 3 ，MgO 2 ，SiO 2 The weight is 83% of the total amount of the accelerator.
As a preferable technical scheme of the invention, the accelerator is 0.45% of the total amount of coal dust.
Embodiment two:
the novel blast furnace injection promoter comprises the following raw materials in parts by weight: caO (CaO) 2 22，MnO 2 35，Fe 2 O 3 12，MgO 2 12，B 2 O 3 6，SiO 2 30。
As a preferable technical scheme of the invention, caO 2 ，MnO 2 ，Fe 2 O 3 ，MgO 2 ，SiO 2 The fineness is required to be below 200 meshes.
As a preferable technical scheme of the invention, mnO 2 ，Fe 2 O 3 ，MgO 2 ，SiO 2 The weight is 90% of the total weight of the accelerator.
As a preferable technical scheme of the invention, the accelerator is 0.5% of the total amount of coal dust.
The pulverized coal is bituminous coal 32+medium sulfur 25+dust 3+semi-coke 10+anthracite 30;
the concrete steps are as follows:
| item category | Example 1 | Example two |
| CaO 2 20 | CaO 2 22 | |
| MnO 2 28 | MnO 2 35 | |
| Fe 2 O 3 12 | Fe 2 O 3 12 | |
| MgO 2 8 | MgO 2 12 | |
| B 2 O 3 4 | B 2 O 3 6 | |
| SiO 2 20 | SiO 2 30 | |
| K+Na+Zn=0.1 | K+Na+Zn=0.15 | |
| The accelerator accounts for the proportion of the coal dust | 83% | 90% |
| Before the coal ratio is improved | 157kg/t | 157kg/t |
| After the coal ratio is improved | 169kg/t | 171kg/t |
| Before coking improvement | 386kg/t | 386kg/t |
| Coking is improved | 378kg/t | 377kg/t |
The accelerator has the main functions of the components:
1. manganese oxide MnO 2 As a catalyst and a combustion improver for coal injection combustion, the catalyst decomposes at high temperature to release oxygen,the combustion of the pulverized coal is promoted, and the combustion performance is improved.
2. Iron oxide: provides a main source of oxygen and improves the combustion performance of the pulverized coal.
3. Boron oxide: the early stage mainly reduces the melting point and ignition point of coal dust, damages a carbon chain structure, and the boride generated in the later stage has the effect of passivating coke and improves the thermal reaction strength of the coke.
4. Calcium peroxide: oxygen is released, the sufficiency of oxygen is ensured, the combustion performance of the fire coal is improved, and the combustion efficiency is improved; the decomposed product calcium oxide assists in desulfurization and sulfur fixation.
5. Magnesium peroxide: oxygen is released in advance and acts together with boron oxide, so that the ignition point of coal powder is reduced, and the oxygen in the initial stage of combustion is ensured. The decomposed product magnesium oxide has a dispersing effect, can be well adhered to the surface of coke, and reduces the thermal reactivity of the coke.
The invention has the advantages that: the magnesium peroxide is fully mixed with high-purity manganese powder, ferric oxide powder, boron oxide powder and high-purity quartz sand and then is evenly mixed with fire coal, and the mixture is sprayed into a blast furnace through a coal spraying system to improve the combustion performance of the sprayed coal and improve the combustion efficiency.
The application field and the use occasion of the magnesium peroxide are expanded, the value of the magnesium peroxide can be fully utilized, the promoted production mainly adopts mechanical mixing, the adding process is simple, secondary pollution is not caused, the application range is wide, the magnesium peroxide plays a dual role, oxygen is released to promote combustion during decomposition, the magnesium oxide passivates the coke, the reactivity of the coke is reduced, and the framework effect of the coke is enhanced.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (4)
1. A novel blast furnace injection promoter is characterized in that: the accelerator comprises the following raw materials in parts by weight: mnO (MnO) 2 28-38，Fe 2 O 3 10-15，B 2 O 3 2-6，CaO 2 18-23，MgO 2 8-12，SiO 2 20-30，K+Na+Zn≤0.15。
2. The novel blast furnace injection promoter according to claim 1, wherein: mnO (MnO) 2 ，Fe 2 O 3 ，SiO 2 ，B 2 O 3 ，CaO 2 ，MgO 2 The fineness is required to be below 200 meshes.
3. The novel blast furnace injection promoter according to claim 1, wherein: mnO (MnO) 2 ，Fe 2 O 3 ，SiO 2 ，B 2 O 3 ，CaO 2 ，MgO 2 The weight is 80-90% of the total weight of the accelerator.
4. The novel blast furnace injection promoter according to claim 1, wherein: the accelerator accounts for 0.3 to 0.6 percent of the total amount of the coal powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310748176.4A CN116891915A (en) | 2023-06-25 | 2023-06-25 | Novel blast furnace injection promoter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310748176.4A CN116891915A (en) | 2023-06-25 | 2023-06-25 | Novel blast furnace injection promoter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116891915A true CN116891915A (en) | 2023-10-17 |
Family
ID=88312930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310748176.4A Pending CN116891915A (en) | 2023-06-25 | 2023-06-25 | Novel blast furnace injection promoter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116891915A (en) |
-
2023
- 2023-06-25 CN CN202310748176.4A patent/CN116891915A/en active Pending
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