CN111518973A - Multi-element mixed semi-coke powder for steelmaking blast furnace injection raw material - Google Patents
Multi-element mixed semi-coke powder for steelmaking blast furnace injection raw material Download PDFInfo
- Publication number
- CN111518973A CN111518973A CN202010464626.3A CN202010464626A CN111518973A CN 111518973 A CN111518973 A CN 111518973A CN 202010464626 A CN202010464626 A CN 202010464626A CN 111518973 A CN111518973 A CN 111518973A
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- CN
- China
- Prior art keywords
- coke powder
- semi
- percent
- powder
- blast furnace
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- 239000002994 raw material Substances 0.000 title claims abstract description 40
- 238000009628 steelmaking Methods 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 title claims abstract description 15
- 239000007924 injection Substances 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003830 anthracite Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 239000011593 sulfur Substances 0.000 claims abstract description 7
- 230000009286 beneficial effect Effects 0.000 claims abstract description 6
- 239000002802 bituminous coal Substances 0.000 claims abstract description 6
- 239000000571 coke Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 13
- 238000012216 screening Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000003623 enhancer Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000012744 reinforcing agent Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 4
- 238000000034 method Methods 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000000047 product Substances 0.000 description 3
- 238000004939 coking Methods 0.000 description 2
- 235000009917 Crataegus X brevipes Nutrition 0.000 description 1
- 235000013204 Crataegus X haemacarpa Nutrition 0.000 description 1
- 235000009685 Crataegus X maligna Nutrition 0.000 description 1
- 235000009444 Crataegus X rubrocarnea Nutrition 0.000 description 1
- 235000009486 Crataegus bullatus Nutrition 0.000 description 1
- 235000017181 Crataegus chrysocarpa Nutrition 0.000 description 1
- 235000009682 Crataegus limnophila Nutrition 0.000 description 1
- 235000004423 Crataegus monogyna Nutrition 0.000 description 1
- 240000000171 Crataegus monogyna Species 0.000 description 1
- 235000002313 Crataegus paludosa Nutrition 0.000 description 1
- 235000009840 Crataegus x incaedua Nutrition 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
Abstract
The invention discloses a multi-element mixed semi-coke powder for a steelmaking blast furnace injection raw material, which comprises the following raw materials: 15 to 25 percent of semi-coke powder, 0.6 to 1 percent of reinforcer, 1.2 to 2 percent of combustion improver, 55 to 65 percent of anthracite powder, 20 percent of bituminous coal powder and 0.6 to 1 percent of curing agent. The invention has the beneficial effects that: the invention adds and mixes the intensifying agent, the combustion improver and the semi-coke powder in the raw materials, improves the burning speed of the blast furnace injection raw materials, ensures that the best ignition point is kept when the multi-component mixed semi-coke powder and the proportioning coal powder are injected into the steelmaking equipment, simultaneously gives full play to the characteristics of high semi-coke heat value, high activity, low ash content, low sulfur content and low price, and achieves the purposes of reducing the steelmaking cost and reducing pollutants under the condition of not influencing the production process at all.
Description
Technical Field
The invention discloses a multi-component mixed semi-coke powder for a steelmaking blast furnace injection raw material, and belongs to the technical field of steel metallurgy.
Background
Semi-coke powder is a solid product obtained by performing medium-low temperature dry distillation on cheap coal powder such as long-flame coal and high-volatile low-deterioration bituminous coal, and belongs to semi-coke. The charcoals in northern Shaanxi have the characteristics of low ash, low sulfur, low phosphorus, low aluminum, high fixed carbon ratio, high chemical activity, high specific resistance, proper grindability, low price and the like. Can be used for providing high heat, reducing agent and carburizing agent in the blast furnace to replace coke, save energy and reduce consumption.
The coal blending pulverized coal of the anthracite and the bituminous coal used at present has the advantages of low combustion speed, poor reaction activity, high volatile matter and sulfur content, large investment in steelmaking environment-friendly equipment, small storage amount of the anthracite in China and high price, thereby improving the steelmaking cost.
Disclosure of Invention
The invention aims to solve the technical problem by providing a multi-element mixed semi-coke powder for a steelmaking blast furnace injection raw material, thereby solving the problem.
In order to achieve the purpose, the invention provides the following technical scheme: a multi-element mixed semi-coke powder for a steelmaking blast furnace injection raw material comprises the following raw materials: 15 to 25 percent of semi-coke powder, 0.6 to 1 percent of reinforcer, 1.2 to 2 percent of combustion improver, 55 to 65 percent of anthracite powder, 20 percent of bituminous coal powder and 0.6 to 1 percent of curing agent.
Preferably, the semi-coke powder is produced by low-temperature coking of one or more of Jurassic period non-sticky coal, long flame coal and gas coal in northern Shaanxi.
Preferably, the multi-element mixed semi-coke powder is obtained by screening through a screening device with the aperture smaller than 200 meshes.
Preferably, the enhancer and the combustion improver are selected and added in a proportion which is beneficial to improving the combustion performance and the reaction activity of the coke powder.
A preparation method of multi-component mixed semi-coke powder for a steelmaking blast furnace injection raw material comprises the following preparation steps:
(1) selecting semi-coke powder of different coal mines and manufacturers in northern Shaanxi according to certain index requirements, reasonably and effectively proportioning, and uniformly mixing to obtain a mixed raw material meeting the blast furnace injection combustion and reaction performance index requirements;
(2) putting the screened mixed semi-coke powder, a reinforcing agent, a combustion improver and proportioned coal powder into a mixing device in proportion for mixing and stirring to form a multi-component mixed semi-coke powder raw material;
(3) putting the stirred semi-coke powder raw material into drying equipment for drying;
(4) putting the dried semi-coke powder raw material into a mill for grinding and screening to obtain multi-element mixed semi-coke powder with the particle size of less than 200 meshes;
(5) and sampling and testing the prepared coke powder, wherein the indexes of moisture, ash content, volatile matter, sulfur content, carbon content, heat value, flammability point, chemical activity and the like meet the requirements, and the coke powder can be bagged to form a qualified product.
Compared with the prior art, the invention has the following beneficial effects:
the invention improves the burning speed of the semi-coke powder by adding and mixing the enhancer, the combustion improver and the anthracite powder into the raw materials, the combustion improver added into the raw materials can adjust the burning point of the multi-component mixed semi-coke powder to a better temperature, so that the semi-coke powder can be fully burnt when being blown into steel-making equipment, the raw material cost and the investment of environment-friendly equipment are reduced, thereby achieving the purpose of reducing the steel-making cost, the curing agent added into the raw materials can stabilize the Hawthorn grindability coefficient of the semi-coke to about 70 percent, the semi-coke particles after being ground by a grinding machine form a specific surface area and a specific resistance value which are beneficial to burning, and the chemical activity of the coke powder is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A multi-element mixed semi-coke powder for a steelmaking blast furnace injection raw material comprises the following raw materials: 15 to 25 percent of semi-coke powder, 0.6 to 1 percent of reinforcer, 1.2 to 2 percent of combustion improver, 55 to 65 percent of anthracite powder, 20 percent of bituminous coal powder and 0.6 to 1 percent of curing agent.
Wherein the semi-coke powder is produced by low-temperature coking of one or more of Jurassic period non-sticky coal, long flame coal and gas coal in northern Shaanxi.
Wherein the multi-element mixed semi-coke powder is obtained by screening through screening equipment with the aperture smaller than 200 meshes.
Wherein, the selection and the addition proportion of the enhancer and the combustion improver are beneficial to improving the combustion performance and the reaction activity of the coke powder.
A preparation method of multi-component mixed semi-coke powder for a steelmaking blast furnace injection raw material comprises the following preparation steps:
(1) selecting semi-coke powder of different coal mines and manufacturers in northern Shaanxi according to certain index requirements, reasonably and effectively proportioning, and uniformly mixing to obtain a mixed raw material meeting the blast furnace injection combustion and reaction performance index requirements;
(2) putting the screened mixed semi-coke powder, a reinforcing agent, a combustion improver and proportioned coal powder into a mixing device in proportion for mixing and stirring to form a multi-component mixed semi-coke powder raw material;
(3) putting the stirred semi-coke powder raw material into drying equipment for drying;
(4) putting the dried semi-coke powder raw material into a mill for grinding and screening to obtain multi-element mixed semi-coke powder with the particle size of less than 200 meshes;
(5) and sampling and testing the prepared coke powder, wherein the indexes of moisture, ash content, volatile matter, sulfur content, carbon content, heat value, flammability point, chemical activity and the like meet the requirements, and the coke powder can be bagged to form a qualified product.
Specifically, during preparation, firstly, screening and index matching are respectively carried out on selected semi-coke powder and coal powder by using screening equipment, then the screened semi-coke powder and coal powder, a reinforcing agent and a combustion improver are put into mixing equipment according to a required proportion to be mixed and stirred, a semi-coke powder raw material is formed after stirring for a period of time, the stirred semi-coke powder raw material is put into drying equipment to be dried, the dried semi-coke powder raw material is put into a grinding machine to be ground, and the multi-element mixed semi-coke powder below 200 meshes is subpackaged into products after being tested to be qualified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The multi-element mixed semi-coke powder for the injection raw materials of the steelmaking blast furnace is characterized by comprising the following raw materials: 15 to 25 percent of semi-coke powder, 0.6 to 1 percent of reinforcer, 1.2 to 2 percent of combustion improver, 55 to 65 percent of anthracite powder, 20 percent of bituminous coal powder and 0.6 to 1 percent of curing agent.
2. The multi-element mixed semi-coke powder for steelmaking blast furnace blowing raw materials as claimed in claim 1, wherein: the multi-element mixed semi-coke powder is a plurality of carbon mixtures prepared according to the national standard requirements of the raw materials for blowing of the steelmaking blast furnace.
3. The multi-element mixed semi-coke powder for steelmaking blast furnace blowing raw materials as claimed in claim 1, wherein: the semi-coke powder is obtained by selecting semi-coke powder from different coal mines and different semi-coke manufacturers in northern Shaanxi, blending according to certain index requirements of moisture, ash content, volatile matter, sulfur content, heat value, grindability and the like, drying, grinding and screening by using screening equipment with the aperture smaller than 200 meshes.
4. The multi-element mixed semi-coke powder for steelmaking blast furnace blowing raw materials as claimed in claim 1, wherein: the selection and the adding proportion of the enhancer and the combustion improver are beneficial to improving the combustion performance and the reaction activity of the coke powder.
5. The method for preparing the multi-component semi-coke powder for the steelmaking blast furnace injection raw material as claimed in claim 1, wherein the method comprises the following steps: the preparation method comprises the following preparation steps:
(1) selecting semi-coke powder of different coal mines and manufacturers in northern Shaanxi according to certain index requirements, reasonably and effectively proportioning, and uniformly mixing to obtain a mixed raw material meeting the blast furnace injection combustion and reaction performance index requirements;
(2) putting the screened mixed semi-coke powder, a reinforcing agent, a combustion improver and proportioned coal powder into a mixing device in proportion for mixing and stirring to form a multi-component mixed semi-coke powder raw material;
(3) putting the stirred multi-element mixed semi-coke powder raw material into drying equipment for drying;
(4) putting the dried semi-coke powder raw material into a mill for grinding and screening to obtain multi-element mixed semi-coke powder with the particle size of less than 200 meshes;
(5) and sampling and testing the prepared coke powder, wherein the indexes of moisture, ash content, volatile matter, sulfur content, carbon content, heat value, flammability point, chemical activity and the like meet the requirements, and the coke powder can be bagged to form a qualified product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010464626.3A CN111518973A (en) | 2020-05-27 | 2020-05-27 | Multi-element mixed semi-coke powder for steelmaking blast furnace injection raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010464626.3A CN111518973A (en) | 2020-05-27 | 2020-05-27 | Multi-element mixed semi-coke powder for steelmaking blast furnace injection raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111518973A true CN111518973A (en) | 2020-08-11 |
Family
ID=71907362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010464626.3A Pending CN111518973A (en) | 2020-05-27 | 2020-05-27 | Multi-element mixed semi-coke powder for steelmaking blast furnace injection raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111518973A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375860A (en) * | 2020-10-21 | 2021-02-19 | 南京钢铁股份有限公司 | Preparation method of blast furnace injection mixed fuel |
| CN114106900A (en) * | 2020-08-28 | 2022-03-01 | 上海梅山钢铁股份有限公司 | Semi-coke-containing mixed fuel for blast furnace injection and preparation method thereof |
| CN115216353A (en) * | 2022-07-18 | 2022-10-21 | 上海宝越耐火材料有限公司 | Preparation method of sintered coke powder |
-
2020
- 2020-05-27 CN CN202010464626.3A patent/CN111518973A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114106900A (en) * | 2020-08-28 | 2022-03-01 | 上海梅山钢铁股份有限公司 | Semi-coke-containing mixed fuel for blast furnace injection and preparation method thereof |
| CN112375860A (en) * | 2020-10-21 | 2021-02-19 | 南京钢铁股份有限公司 | Preparation method of blast furnace injection mixed fuel |
| CN112375860B (en) * | 2020-10-21 | 2022-04-19 | 南京钢铁股份有限公司 | Preparation method of blast furnace injection mixed fuel |
| CN115216353A (en) * | 2022-07-18 | 2022-10-21 | 上海宝越耐火材料有限公司 | Preparation method of sintered coke powder |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200811 |
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| WD01 | Invention patent application deemed withdrawn after publication |