CN101724485A - Novel blast-furnace coal-injection combustion improver - Google Patents
Novel blast-furnace coal-injection combustion improver Download PDFInfo
- Publication number
- CN101724485A CN101724485A CN200810228191A CN200810228191A CN101724485A CN 101724485 A CN101724485 A CN 101724485A CN 200810228191 A CN200810228191 A CN 200810228191A CN 200810228191 A CN200810228191 A CN 200810228191A CN 101724485 A CN101724485 A CN 101724485A
- Authority
- CN
- China
- Prior art keywords
- coal
- furnace
- blast
- injection
- combustion
- 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
Landscapes
- Manufacture Of Iron (AREA)
Abstract
The invention provides a novel blast-furnace coal-injection combustion improver. According to the catalytic combustion-supporting principle of metal oxides or salts, combined with the specific characteristics of blast-furnace coal injection, such as choosing a suitable formulation of the blast-furnace combustion improver and technical parameters of adding proportion, a blast-furnace coal-injection combustion-supporting catalyst can accelerate oxidation process, improve the combustion efficiency of pulverized coal, increase coal injection rate, reduce the carbon content of gas dust, raise the replacement ratio of the pulverized coal and lower furnace-entering coke rate. As part of coke rate is replaced by the pulverized coal, coal resources are reasonably utilized so as to help the steel industry to achieve the aims of saving energy and reducing consumption.
Description
Technical field the present invention relates to a kind of catalyzer, particularly a kind of smelting iron and steel enterprise novel blast-furnace coal-injection combustion improver that is used for.
Background technology, under the prerequisite that guarantees steel products quality and ironmaking production efficiency, adopting pulverized coal injection, briquet replacing coke, reducing cost is ironmaking technology commonly used, increasing injecting coal quantity is the effective way that further reduces blast furnace coke ratio.
But coal injection will make rate of combustion reduction, the unburn powder amount of coal dust before the air port increase in blast furnace too much, bring a series of detrimentally affect for the normal smelting of blast furnace.Although do not require the coal dust district's perfect combustion of circling round in the air port in the coal powder injection process, the uncombusted part can be consumed utilization in blast furnace, and overheavy firing remains a committed step that increases the coal powder injection ratio.Along with injecting coal quantity improves, must take the measure of overheavy firing, could keep before the air port coal combustion rate constant or descend seldom, combustion chamber district uncombusted coal dust is unlikely to worsen the ventilation property of blast furnace stock column, makes that cupola well is active, the coal gas distributions is reasonable, blast furnace permeability good, working of a furnace stable smooth operation.
At present, the various destruction ignition dopes that pulverized coal injection uses also come with some shortcomings, and for example: the ignition dope that has needs addition too big, reaches 2～5% of coal dust weight, and when addition less than 1% the time, the catalytic combustion-supporting effect is just not obvious; Contain potassium permanganate (KmnO in the prescription that has
4), and KmnO
4Only 248 ℃ of decomposition temperatures, certain hidden danger of bringing for pulverized coal preparation system safety.As everyone knows, pulverized coal injection especially blowing bituminous coal and mixed coal is a technology that security requirement is high, and system's oxygen level rising, point of ignition reduction etc. all can bring new potential safety hazard; The ignition dope that has need be warmed to 200 ℃, and the addition means complexity, needs specialized apparatus; The commercial blast furnace ignition dope that also has contains the disadvantageous K of the blast furnace quality of production, elements such as Na, Cl.
Just be based on above reason, the present invention proposes a kind of novel blast-furnace coal-injection catalysis burning-rate accelerator, exploitation efficient and environment-friendly type blast-furnace coal-injection combustion improver is to accelerate the oxidizing reaction speed of pulverized coal injection.The metallic element that ignition dope contains has the effect aspect two in combustion reactions: the one, and promote the pyrolysis of fugitive constituent to separate out, obviously reduce the point of ignition of combustiblematerials, the 2nd, accelerate process, the raising efficiency of combustion of oxidizing reaction, thereby strengthened burning.Add ignition dope and reduced the needs of coal combustion, shortened the required time of coal dust perfect combustion excess oxygen.Because the abundant burning of coal dust can also be regulated the working of a furnace, reduce the content of coal in the gas ash, help environment protection.
Summary of the invention the purpose of this invention is to provide a kind of novel blast-furnace coal-injection combustion improver.Catalytic combustion-supporting principle according to metal oxide or salt, concrete characteristics in conjunction with pulverized coal injection, as select suitable blast furnace ignition dope to fill a prescription and the technical parameter adding proportion, the pulverized coal injection combustion supporting catalyst can be accelerated the process of oxidizing reaction, improve coal dust firing efficient, increase the injection coal ratio, reduce the gas ash carbon content, improve the coal dust substitution rate, reduce ratio of putting coke into furnace.Coal dust substitutes the part coke ratio, has rationally utilized coal resources, helps steel industry and reaches energy-saving and cost-reducing target.
The technical solution adopted for the present invention to solve the technical problems is: novel blast-furnace coal-injection combustion improver is used for iron and steel metallurgy enterprise ironmaking to be produced, and after coal dust and ignition dope are pre-mixed and stir, sends into automatic coal feeder, sends in the stove with air mixed.
The novel blast-furnace coal-injection combustion improver composition:
Proportioning:
Calcium oxide (CaO) 40-65%
Magnesium oxide (MgO) 20-30%
Manganse Dioxide (MnO
2) 15-20%
Rare earth oxide 1-5%
Weight is by 100%.
The mechanism effect of each component:
The reason of promotion coal dust firing is to contain in the substance constituent element of catalytic powder coal combustion, do not fill full being often used in as basic metal, alkali earth metal or 3d layer electronics and make subgroup element, the thermal cracking processes of energy catalysis coal dust, help separating out of fugitive constituent, or strengthen coal dust firing by the active oxidation material that additive discharges.Has MnO
2Key with strong combustion-supporting effect is that thermolysis discharges active oxygen coal powder ignition incipient flame velocity of propagation is accelerated.In addition, because manganese element helps to improve steel performance, so MnO
2Be the effective ignition dope that improves the pulverized coal injection amount, and useful and harmless to smelting technology.Calcium and magnesium also have certain catalytic effect.
The catalytic combustion-supporting excellent property of rare earth oxide can reduce ignition time, reduces to burn the time, thereby improves efficiency of combustion.
The Electron Energy Disperse Spectroscopy analysis of ignition dope
Analyzed the chemical ingredients of blast furnace ignition dope by incidental Electron Energy Disperse Spectroscopy on the scanning electronic microscope.Analysis revealed, except C and O (main form with carbonate), other element mainly contains cerium, lanthanum, manganese, calcium, magnesium (composition that obvious combustion-supporting effect is arranged), silicon (element of normal association in the inorganic mineral).But do not contain sodium, potassium, chlorine etc. iron-smelting blast furnace is had composition.
The XRD analysis of ignition dope
XRD analysis, i.e. XD-5A type X-ray diffraction analysis instrument has been analyzed the crystalline structure of blast-furnace coal-injection combustion improver main component.Analytical results has proved that the main component in the ignition dope is manganese, calcium, and exists with the form of Manganse Dioxide and lime carbonate, and other composition is a magnesiumcarbonate etc.
Based on the selectivity absorption characteristic of agglomerate to extraordinary chemical substance.
Concrete technology: novel blast-furnace coal-injection combustion improver, carry out mixed configuration by weight, stirred then 2-3 minute, granularity requirements is more than or equal to 97mm.Ignition temperature should be greater than 500 ℃.
The invention has the beneficial effects as follows: novel blast-furnace coal-injection combustion improver has improved coal dust firing efficient 6%, reduced ratio of putting coke into furnace 10.5kg/t.Fe, in addition, because the abundant burning of coal dust, reduced the content 8.09% of C in the furnace roof gas ash, help reducing topsoil, also have certain environmental benefit and social benefit.
Embodiment
Embodiment
Novel blast-furnace coal-injection combustion improver is used for iron and steel metallurgy enterprise ironmaking to be produced, and after coal dust and ignition dope are pre-mixed and stir, sends into automatic coal feeder, sends in the stove with air mixed.
The novel blast-furnace coal-injection combustion improver composition:
Proportioning:
Calcium oxide (CaO) 40-65%
Magnesium oxide (MgO) 20-30%
Manganse Dioxide (MnO
2) 15-20%
Rare earth oxide 1-5%
Weight is by 100%.
Claims (1)
1. novel blast-furnace coal-injection combustion improver composition, it is characterized in that: the composition proportioning is:
Calcium oxide (CaO) 40-65%
Magnesium oxide (MgO) 20-30%
Manganse Dioxide (MnO
2) 15-20%
Rare earth oxide 1-5%
Weight is by 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810228191A CN101724485A (en) | 2008-10-21 | 2008-10-21 | Novel blast-furnace coal-injection combustion improver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810228191A CN101724485A (en) | 2008-10-21 | 2008-10-21 | Novel blast-furnace coal-injection combustion improver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101724485A true CN101724485A (en) | 2010-06-09 |
Family
ID=42446048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810228191A Pending CN101724485A (en) | 2008-10-21 | 2008-10-21 | Novel blast-furnace coal-injection combustion improver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101724485A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451333A (en) * | 2013-09-04 | 2013-12-18 | 武钢集团昆明钢铁股份有限公司 | Blast furnace coal injection accelerant as well as preparation method and application thereof |
| CN103484666A (en) * | 2013-09-07 | 2014-01-01 | 鞍钢股份有限公司 | Additive for carbon composite briquette and preparation and using methods thereof |
| CN107326132A (en) * | 2017-07-05 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of ironmaking blowing additive, ironmaking blowing Mixture Density Networks and ironmaking blowing Mixture Density Networks |
| CN107641670A (en) * | 2017-09-29 | 2018-01-30 | 四川德胜集团钒钛有限公司 | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio |
| CN108504414A (en) * | 2018-05-28 | 2018-09-07 | 马鞍山钢铁股份有限公司 | A kind of combustion adjuvant and application method and device improving blast furnace injection rate of pulverized coal combustion |
-
2008
- 2008-10-21 CN CN200810228191A patent/CN101724485A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451333A (en) * | 2013-09-04 | 2013-12-18 | 武钢集团昆明钢铁股份有限公司 | Blast furnace coal injection accelerant as well as preparation method and application thereof |
| CN103451333B (en) * | 2013-09-04 | 2015-07-22 | 武钢集团昆明钢铁股份有限公司 | Blast furnace coal injection accelerant as well as preparation method and application thereof |
| CN103484666A (en) * | 2013-09-07 | 2014-01-01 | 鞍钢股份有限公司 | Additive for carbon composite briquette and preparation and using methods thereof |
| CN107326132A (en) * | 2017-07-05 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of ironmaking blowing additive, ironmaking blowing Mixture Density Networks and ironmaking blowing Mixture Density Networks |
| CN107641670A (en) * | 2017-09-29 | 2018-01-30 | 四川德胜集团钒钛有限公司 | A kind of blast furnace smelting method for reducing coke ratio and carrying high-coal ratio |
| CN108504414A (en) * | 2018-05-28 | 2018-09-07 | 马鞍山钢铁股份有限公司 | A kind of combustion adjuvant and application method and device improving blast furnace injection rate of pulverized coal combustion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101691514B (en) | Coal dust combustion improver for cement kiln | |
| CN102199466B (en) | Coal-saving combustion-supporting additive | |
| CN101210209B (en) | Application of coal modifier in shaft kiln incineration and producing technique thereof | |
| CN100336918C (en) | Chemical additive for sintering iron ore fine | |
| CN102559331A (en) | Pulverized coal combustion improver for thermal power plant | |
| CN101475864A (en) | Non-sodium chloride environment-friendly type coal-saving combustion adjuvant special for cement | |
| CN102191109B (en) | Liquid coal additive and preparation method thereof | |
| CN101935572B (en) | Composite additive for spraying coal into blast furnace | |
| CN103013616B (en) | Catalytic combustion improver for blast furnace coal injection and application method thereof | |
| CN105907951B (en) | A kind of sinter additives and its preparation and application | |
| CN101724485A (en) | Novel blast-furnace coal-injection combustion improver | |
| CN106800959A (en) | Coal combustion supporting and sulphur fixing agent | |
| CN105542822A (en) | Hematite composite additive for reducing civil coke ignition temperature, preparing method and application | |
| CN102643704A (en) | Fuel coal oxygen-increasing combustion-supporting explosion pill as well as preparation method and application thereof | |
| CN100351397C (en) | Additive of agglomeration for iron mine | |
| CN111960804A (en) | Method for manufacturing high-strength sintered building material by using molten steel slag | |
| CN1793386A (en) | Blowing catalysing synergist for furnace and production tech. thereof | |
| CN103266190A (en) | Multifunctional additive for pulverized coal injected into blast furnace and multifunctional additive addition method | |
| CN101509066A (en) | High-efficiency energy-conservation sintering additive | |
| CN104087692B (en) | A kind of blast-furnace coal-injection combustion improver and using method thereof | |
| CN103773550B (en) | Liquid propellant for coal gangue power generation | |
| CN103131519A (en) | Boiler fire coal sulfur fixation composition method | |
| CN106635241A (en) | Composite coal injection combustion improver for cement kilns and application thereof | |
| CN1958757A (en) | Combustion supporting, coal saving, modified additive | |
| CN100516183C (en) | Coal burning catalyzing and inducing activator for cement industry and its use |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100609 |