CN101629220B - Blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization - Google Patents
Blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization Download PDFInfo
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- CN101629220B CN101629220B CN2009101638733A CN200910163873A CN101629220B CN 101629220 B CN101629220 B CN 101629220B CN 2009101638733 A CN2009101638733 A CN 2009101638733A CN 200910163873 A CN200910163873 A CN 200910163873A CN 101629220 B CN101629220 B CN 101629220B
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- coal
- pyrogenation
- carbonization
- blast furnace
- blowing material
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Abstract
The invention discloses a blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization, which relates to an auxiliary additive during blast furnace iron making. The blast furnace blowing material is formed by coal preparation step, pyrogenation and carbonization step and crushing step, wherein the coal preparation step selects coal with low metamorphic grade, the dust content Ad of the coal is less than 12.5 percent, the sulfur content St is less than 0.61 percent and the gelatinous layer Y is less than 10 mm; the pyrogenation and carbonization step adopts an external heat type three-section upright furnace pyrogenation and carbonization process, the carbonization temperature is controlled to be 550-900 DEG C and the volatile component is less than 15 percent; volatile substances generated in the pyrogenation and carbonization process can be used for reclaiming and producing coal gas and tar; and the crushing step is to crush coal dust which is subject to the pyrogenation and carbonization. The blast furnace blowing material can completely achieve the function of the blast furnace blowing material which is currently and widely used, adopt low-price bituminous coal, and save the exploration and transportation expense of a plurality of blending coal, thereby the blast furnace blowing material has the characteristics of low prices and good quality.
Description
Technical field
A kind of blast furnace blowing material that utilizes the processing of low metamorphic grade bituminous coal pyrogenation and carbonization, the adjunct that uses when relating to blast furnace ironmaking.
Background technology
Pulverized coal injection in blast furnace is called for short blast furnace blowing material, but its instead of part metallurgical coke, and help blast-furnace process control, enhance productivity.Modern blast furnace is smelted needs to use coke, its effect in blast furnace to provide the heat that smelting process needs, the reductive agent that reducing iron ore needs, and the skeleton of keeping blast furnace stock column (particularly cohesive zone and following position thereof) ventilation property.Pulverized coal injection in blast furnace is from the blast-furnace tuyere pulverized anthracite that directly winding-up is levigate in stove, works heat and the reductive agent effect of providing to substitute coke, thereby reduces coke ratio, reduce production costs, and be the great technological revolution that modern blast furnace is smelted.
Though blast furnace blowing material is good, have relatively high expectations for the ature of coal of the coal of making it.General a kind of coal is difficult to reach its requirement, needs several coals to fit over together.Will improve its cost like this.
Summary of the invention
The objective of the invention is to utilize the blast furnace blowing material of low metamorphic grade bituminous coal pyrogenation and carbonization processing, to reduce the cost of blast furnace blowing material.
The blast furnace blowing material of low metamorphic grade bituminous coal pyrogenation and carbonization processing that utilizes of the present invention is finished through being equipped with coal operation, pyrogenation and carbonization operation and pulverizing process; Be equipped with the coal operation and select low metamorphic grade bituminous coal for use, require ash Ad＜12.5% of its coal, sulphur content St＜0.61% of coal, the gelatinous layer Y＜10mm of coal; The pyrogenation and carbonization operation adopts three sections upright furnace pyrogenation and carbonizations of external-heat technology, and pyrolysis temperature is controlled at 550-900 ℃, makes the volatile matter of coal be lower than 15% and gets final product; The volatile matter that the pyrogenation and carbonization process produces can reclaim produces coal gas and tar; Pulverizing process is with the broken powder process of the coal dust after the hot destructive distillation, carries out according to blast furnace blowing material product national standard (GB/T 18512-2008) regulation.
This blast furnace blowing material is through testing the effect that can reach present widely used blast furnace blowing material fully.This blast furnace blowing material has adopted a kind of low price bituminous coal, and has saved the exploitation and the trucking costs of multiple coal blending, thereby has cheap and good-quality characteristics.
Embodiment
The blast furnace blowing material of low metamorphic grade bituminous coal pyrogenation and carbonization processing that utilizes of the present invention is finished through being equipped with coal operation, pyrogenation and carbonization operation and pulverizing process; Be equipped with the coal operation and select low metamorphic grade bituminous coal for use, require ash Ad＜12.5% of its coal, sulphur content St＜0.61% of coal, the gelatinous layer Y＜10mm of coal; The pyrogenation and carbonization operation adopts three sections upright furnace pyrogenation and carbonizations of external-heat technology, add upright furnace continuously from being equipped with the coal that comes between coal car, earlier deviate from moisture content in the coal through the preheating section drying, descend again and enter retort section, the retort section heat produces flue gas by firing tunnel in coking furnace and air twinflue, waste gas circulation is provided after combustion chambers burn, high temperature carbonization in 700-900 ℃ makes the volatile matter of coal be lower than 15% and gets final product; Material after the destructive distillation falls into water sealed tank through the bottom cooling section after melting down the cooled coal gas cooling, regularly it is discharged by helix transporting device then, draws off material and is sent to blowing material powder process by the conveyor that has dw; The volatile matter that the pyrogenation and carbonization process produces can reclaim produces coal gas and tar; Pulverizing process is with the broken powder process of the coal dust after the hot destructive distillation, carries out according to blast furnace blowing material product national standard (GB/T 18512-2008) regulation, and material spray is crushed to the 100-200 order, and wherein 200 purposes account for 30-40%.
Claims (1)
1. a blast furnace blowing material that utilizes the processing of low metamorphic grade bituminous coal pyrogenation and carbonization is characterized in that finishing through being equipped with coal operation, pyrogenation and carbonization operation and pulverizing process; Be equipped with the coal operation and select low metamorphic grade bituminous coal for use, require ash Ad＜12.5% of its coal, sulphur content St＜0.61% of coal, the gelatinous layer Y＜10mm of coal; The pyrogenation and carbonization operation adopts three sections upright furnace pyrogenation and carbonizations of external-heat technology, add upright furnace continuously from being equipped with the coal that comes between coal car, earlier deviate from moisture content in the coal through the preheating section drying, descend again and enter retort section, the retort section heat produces flue gas by firing tunnel in coking furnace and air twinflue, waste gas circulation is provided after combustion chambers burn, high temperature carbonization in 700-900 ℃ makes the volatile matter of coal be lower than 15%; Material after the destructive distillation falls into water sealed tank through the bottom cooling section after melting down the cooled coal gas cooling, regularly it is discharged by helix transporting device then, draws off material and is sent to blowing material powder process by the conveyor that has dw; The volatile matter that the pyrogenation and carbonization process produces can reclaim produces coal gas and tar; Pulverizing process is that material spray is crushed to the 100-200 order with the broken powder process of the coal dust after the hot destructive distillation, and wherein 200 purposes account for 30-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101638733A CN101629220B (en) | 2009-08-07 | 2009-08-07 | Blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101638733A CN101629220B (en) | 2009-08-07 | 2009-08-07 | Blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101629220A CN101629220A (en) | 2010-01-20 |
| CN101629220B true CN101629220B (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101638733A Expired - Fee Related CN101629220B (en) | 2009-08-07 | 2009-08-07 | Blast furnace blowing material formed by processing bituminous coal with low metamorphic grade through pyrogenation and carbonization |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260766A (en) * | 2010-05-28 | 2011-11-30 | 马西元 | Smelting production method of iron |
| CN102453489B (en) * | 2010-10-24 | 2013-12-18 | 中国矿业大学 | Poly-generation process for pyrolyzing solid thermal carrier via low-rank coal vibration bed |
| CN102408931A (en) * | 2011-09-30 | 2012-04-11 | 内蒙古包钢钢联股份有限公司 | Mixed fuel for blast furnace injection |
| CN102994131B (en) * | 2011-12-21 | 2014-04-30 | 山西鑫立能源科技有限公司 | Coal preheating device of coal pyrolysis furnace |
| CN103013543A (en) * | 2013-01-04 | 2013-04-03 | 康广民 | Method and kiln for preparing pulverized injection coal by using long flame coal |
| CN103451332A (en) * | 2013-08-30 | 2013-12-18 | 陕西煤业化工技术研究院有限责任公司 | System and method for carrying out blast furnace ironmaking by using small-particle-size bituminous coals |
| CN107400526A (en) * | 2016-05-18 | 2017-11-28 | 王彩虹 | A kind of small particle low order low-temperature pyrolysis of coal method |
| CN106636500B (en) * | 2016-12-27 | 2018-10-23 | 中钢集团鞍山热能研究院有限公司 | A kind of method and device of blast furnace Slag treatment coked waste water |
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2009
- 2009-08-07 CN CN2009101638733A patent/CN101629220B/en not_active Expired - Fee Related
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| CN101629220A (en) | 2010-01-20 |
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Granted publication date: 20110105 Termination date: 20130807 |