CN1300858A - Technology for smelting iron in blast furnace by two-segment blowing of powdered coal - Google Patents
Technology for smelting iron in blast furnace by two-segment blowing of powdered coal Download PDFInfo
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- CN1300858A CN1300858A CN 00123294 CN00123294A CN1300858A CN 1300858 A CN1300858 A CN 1300858A CN 00123294 CN00123294 CN 00123294 CN 00123294 A CN00123294 A CN 00123294A CN 1300858 A CN1300858 A CN 1300858A
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Abstract
A two-segment coal powder blowing technology for smelting iron in blast furnace, based on existing technology, features that the second sigment of coal powder blowing holes is arranged in the region above soft smelting band, furnace waist and lower furnace body and the inertial gas is used as carrier of coal powder. Its advantages include high amount of sprayed coal increased by 30-50 Kg/t-p, protecting coke strength, increasing heat efficiency and long service life of cooler and blast furnace.
Description
This invention is a kind of processing method of coal injection during blast furnace ironmaking is produced.
Make fuel and reductive agent part coke for replacing is jetted to high furnace interior with coal dust, can reduce production costs, coal resources are more effectively utilized, therefore in blast furnace ironmaking production, be widely used and obtained remarkable effect.Under the hot blast excess oxygen, the straying quatity of part enterprise coal dust has reached or has surpassed 150 kilograms of/ton iron.But, further improve coal powder blowing amount, use higher-quality coke, higher-quality iron-bearing material with requiring and adopt other ancillary technique such as high oxygen enrichment, high wind-warm syndrome, otherwise will cause the blast wandering of blast-furnace smelting, influence the ordinary production of blast furnace.The present coal-injection process method of implementing (hereinafter to be referred as technology), traditional in other words pulverized coal injection in blast furnace technological process is: the coal dust after will processing is delivered to injecting station, use pressurized air as carrier by injecting station again, be delivered to the blast-furnace tuyere place through transfer line, from the air port coal dust sprayed into blast furnace with spray gun.To cause spraying into the coal dust that circles round in distinguishing in the production when the straying quatity of coal dust surpasses some amount can not fully burn, and forms unburned coal powder.The too much existence of unburned coal powder will have influence on the ordinary production of blast furnace, often show as the generation of phenomenons such as cupola well accumulation in the stove, permeability of stock column variation, the interior coal gas maldistribution of stove, cause not direct motion of blast furnace.Thereby in order to guarantee the further winding-up amount that increases coal dust under the prerequisite that blast furnace production is normally carried out, various countries all adopt some ancillary techniques, as fine fodder, oxygen enrichment, high wind-warm syndrome etc.And the employing of these ancillary techniques can make iron-smelting process complicated on the one hand.
The purpose of this invention is to provide a kind of processing method of novel blast furnace ironmaking coal injection, realizes the further raising of coal dust straying quatity under the prerequisite that does not increase more auxiliary facility.Through studying repeatedly and testing, invent out " two-part pulverized coal injection into blast furna powder process for powder ", make goal of the invention be satisfied.
This invention is on the basis of keeping existing blowing device and technology, increases in the blast furnace appropriate location that one section new spray gun is achieved, and concrete step is: (1) utilizes original its airing system of injecting station appropriate reconstruction, adopts N
2Deng rare gas element (non-oxygen
Voltinism gas) be source of the gas, regulate bleed pressure to the degree that coal dust can be jetted smoothly in stove,
Can carry out the conveying of second section coal suitable for blowing powder; Consider injection system operation independence and
Handiness also can be built the conveying that injecting station carries out second section coal suitable for blowing powder separately; (2) with pipeline coal dust is delivered to the shaft platform, and in uniformly distributing to the second section each spray gun; (3) same in blast furnace the segment of top, furnace bosh 3 or shaft 5 bottoms of cohesive zone 2
The cross section evenly is provided with second section coal dust spray that several quantity and spray gun quantity are complementary along its circumference
The rifle hole; (4) coal gas leaks from gun hole when preventing second section breeze blowing system blow off coal dust, and is every
Individual gun hole tapping all is provided with inserts holster and non-return device, its form and present tuyere injection place
The device that uses is similar; (5) in the two-stage type blowing breeze processing method second section coal injection amount be generally 30～
50kg/t-p。
Blast furnace ironmaking two-stage type blowing breeze technology of the present invention is simple, practical, according to the principle of the invention, not having under other any ancillary technique condition situations, improves the winding-up amount of coal dust, and the physical strength of coke in the protection stove prolongs generation blast furnace campaign.
Accompanying drawing 1 is the synoptic diagram of this invention " the two-part pulverized coal injection into blast furna powder process for powder " finished.
The present invention will be further described below in conjunction with drawings and Examples.
Among Fig. 1,1 is the blast-furnace tuyere position, and 2 is the blast furnace melting with soft position, and 3 is blast furnace bosh, and 4 is second section coal injection spray gun position in the novel coal-injection process method, and 5 is blast furnace stack.As seen from Figure 1, the blowing process method that the invention realized be in keeping traditional blowing process method coal dust outside blast-furnace tuyere 1 sprays into, second section coal injection spray gun hole (position 4 in the accompanying drawing 1) is set in the segment of blast furnace melting with soft 2 tops, furnace bosh 3 or shaft 5 bottoms, insert spray gun, spray into coal dust.According to the above, this invention is created and is intended implementing on certain blast furnace of area northeastward.Specific form is on original coal injection system basis of invariable, sets up one separately and is used for the breeze blowing system that shaft is jetted, and relies on N
2Gas is source of the gas, by pipeline coal dust is delivered to each spray gun that State of Blast Furnace is in.Be in along the circumferential direction to be in State of Blast Furnace and leave 12 holes on the same cross section equably, each injection hole place is provided with and inserts holster and non-return device in the same manner.Estimate that shaft coal injection amount is 40kg/t-p;
Second section injection system that this invention adopted also can be used for other blast furnace blowing material of jetting, as coke powder, breeze, ashes or the like.In sum, this invention is created has popularizing value, if can use on blast furnace, is bound to bring remarkable economic efficiency and social benefit to factory.
Claims (5)
1. pulverized coal injection into blast furna powder process for powder.This processing method is when keeping the spray gun coal injection that utilizes the insertion air port, utilize coal dust handling equipment pulverized coal conveying, it is characterized in that: be that carrier is delivered to coal dust in each spray gun of second section with gas, in the segment of top, blast furnace bosh or the restoration of lower stack of cohesive zone second section coal injection spray gun hole is set, spray gun inserts behind these injection holes coal injection in blast furnace.
2. according to the said coal-injection process method of claim 1, it is characterized in that: second section coal injection evenly is provided with along its circumference in the same cross section of blast furnace with gun hole, and each gun hole tapping all is provided with inserts holster and non-return device.
3. according to the said coal-injection process method of claim 1, it is characterized in that: second section employed coal dust handling equipment of winding-up is an injection system independently.
4. according to the said coal-injection process method of claim 1, it is characterized in that: employed injection material is various winding-up materials in the technology.
5. according to the said coal-injection process method of claim 1, it is characterized in that: employed gas is rare gas element in the technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123294 CN1128230C (en) | 2000-11-23 | 2000-11-23 | Technology for smelting iron in blast furnace by two-segment blowing of powdered coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123294 CN1128230C (en) | 2000-11-23 | 2000-11-23 | Technology for smelting iron in blast furnace by two-segment blowing of powdered coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1300858A true CN1300858A (en) | 2001-06-27 |
| CN1128230C CN1128230C (en) | 2003-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00123294 Expired - Fee Related CN1128230C (en) | 2000-11-23 | 2000-11-23 | Technology for smelting iron in blast furnace by two-segment blowing of powdered coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128230C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449173A (en) * | 2009-05-29 | 2012-05-09 | 杰富意钢铁株式会社 | Blast furnace operation method |
| CN108220515A (en) * | 2018-03-01 | 2018-06-29 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265146A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN108265141A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | A kind of vertical two-part blast-furnace coal injection device |
| CN109161621A (en) * | 2018-11-19 | 2019-01-08 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| WO2023097942A1 (en) * | 2021-12-03 | 2023-06-08 | 昌黎县兴国精密机件有限公司 | Injection regulation and control device and method for blast furnace low-carbon smelting |
-
2000
- 2000-11-23 CN CN 00123294 patent/CN1128230C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449173A (en) * | 2009-05-29 | 2012-05-09 | 杰富意钢铁株式会社 | Blast furnace operation method |
| CN108220515A (en) * | 2018-03-01 | 2018-06-29 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265146A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN108265141A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | A kind of vertical two-part blast-furnace coal injection device |
| CN108220515B (en) * | 2018-03-01 | 2019-09-03 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265146B (en) * | 2018-03-01 | 2019-09-03 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN109161621A (en) * | 2018-11-19 | 2019-01-08 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| CN109161621B (en) * | 2018-11-19 | 2019-11-05 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| WO2023097942A1 (en) * | 2021-12-03 | 2023-06-08 | 昌黎县兴国精密机件有限公司 | Injection regulation and control device and method for blast furnace low-carbon smelting |
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| Publication number | Publication date |
|---|---|
| CN1128230C (en) | 2003-11-19 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031119 Termination date: 20101123 |