CN103836645A - Sintering ignition method with low gas unit consumption - Google Patents
Sintering ignition method with low gas unit consumption Download PDFInfo
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- CN103836645A CN103836645A CN201410104983.3A CN201410104983A CN103836645A CN 103836645 A CN103836645 A CN 103836645A CN 201410104983 A CN201410104983 A CN 201410104983A CN 103836645 A CN103836645 A CN 103836645A
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Abstract
The invention discloses a sintering ignition method with low gas unit consumption. The sintering ignition method comprises the steps that the suitable gas-air ratio is set to range from 1:3.5 to 1:4 to ensure complete combustion of ignition gas; air capacity of a first air bellow, a second air bellow and a third air bellow is controlled to range from 25 % to 30 % so as to control ignition and prevent ignition depth from being not enough or exceeding. According to the sintering ignition method with low gas unit consumption, gas and air can be mixed according to the ratio of complete combustion, ignition depth is prevented from exceeding, and therefore sinter gas unit consumption is reduced to the maximum degree. The sintering ignition method with low gas unit consumption enables sintering gas unit consumption to be reduced to reach 0.047 GJ/t which achieves the domestic first-class index level, is significant in energy saving effect, and has the high popularization and application vale compared with similar sintering machines.
Description
Technical field
The invention belongs to steel industry SINTERING PRODUCTION technical field, relate to a kind of sintering coal gas ignition method, the method is particularly conducive to and reduces sintering deposit gas unit consumption.
Background technology
Sintering process is carried out coal gas ignition from igniter to be provided heat, coal gas and air mixed firing are lighted generation burning zone the solid fuel in the sintering feed on bed of material top layer, in the bed of material, burning zone borrows draft effect progressively to move down, in the bed of material, solid fuel continuous burning produces high temperature, and the complicated physical-chemical reaction of SINTERING PRODUCTION is carried out smoothly.Sintering coal gas ignition quality directly affects the quality quality of sintering process and product sintering deposit and the height of solid burnup.Sintering ignition gas unit consumption is to produce the ignition coal tolerance that sintering deposit per ton consumes, and is an Important Economic technical indicator weighing sintering energy consumption.
The traditional process control parameter of the many employings of sintering ignition at present: coal is empty, and sintering machine 1～3# bellows air quantity is controlled at 70～100% than selecting 1:5, igniting negative pressure 10～14kPa.
There is following problem in above process control parameter:
1) the theory calculating coal of guarantee coal gas completing combustion is empty than being 1:3.75, and the selected value 1:5 of coal sky ratio, causes air to have more than needed 1.25, and it is high that impact meets the requirements of the needed gas unit consumption of firing temperature;
2) be that the selected value of sintering machine 1～3# bellows air quantity, igniting negative pressure is bigger than normal, cause igniting degree of depth surplus, cause gas unit consumption high.At present, the research that reduces sintering gas unit consumption with put into practice that development level is not high at home, within 2004, domestic similar advanced sintering machine gas unit consumption is generally higher, Baosteel is 0.0677GJ/t, Anshan iron and steel plant is 0.094GJ/t, Wuhan Iron and Steel Plant is 0.076GJ/t, Laigang 3 × 105m
2sintering machine sintering gas unit consumption is 0.103GJ/t, Laigang 2 × 265m
2after sintering machine adopts diclinic belt igniter, gas unit consumption is still up to 0.073GJ/t.
Summary of the invention
The object of the invention is to solve the higher problem of SINTERING PRODUCTION gas unit consumption, a kind of sintering ignition method of low gas unit consumption is provided.Method of the present invention can solve two defects of the prior art: the one, and coal sky is more improper than selected value, it is high that the impact causing meets the requirements of the needed gas unit consumption of firing temperature, and the 2nd, selected value igniting degree of depth surplus, the gas unit consumption causing bigger than normal of sintering machine 1～3# bellows air quantity, igniting negative pressure is high.
Method of the present invention comprises: when igniting, coal is empty than being 1:3.5～4, best 1:3.75, the completing combustion of guarantee point fire gas; By regulating bellows turnover panel aperture that bellows air quantity is remained on to 25～30% with igniting, reach igniting depth requirements, the degree of depth that prevents from lighting a fire is not enough or superfluous.
Preferably, described coal is empty than being 1:3.75.
Preferably, in bellows, maintain lower negative pressure 4～5kPa when igniting.
The present invention can ensure that coal gas and air are in the ratio of the completing combustion degree of depth surplus of mixing, prevent from lighting a fire, thereby reduces to greatest extent sintering deposit gas unit consumption.The present invention is after the application of 2 × 265m2 sintering machine, and sintering gas unit consumption is reduced to 0.047GJ/t, reaches internal class index level, and energy-saving effect is remarkable, on similar sintering machine, has highly application value.
Brief description of the drawings
Fig. 1, sintering coal gas ignition diagrammatic elevation view of the present invention
In figure: 1, air duct; 2, coke oven gas pipe; 3, igniter; 4, sintering feed; 5, chassis; 6, star-wheel; 7, bellows; 8, wind box branch pipe; 9, bellows turnover panel; 10, sintering machine.
Detailed description of the invention
As shown in Figure 1, coal gas is lighted after mixing with the ratio of 1:3.75 with air, by regulating bellows turnover panel aperture that 1～3# bellows air quantity is remained on to 25～30% to control 4～5kPa lower negative pressure in bellows, make sintering ignition quality tool good, effectively reduce sintering gas unit consumption.
Coal is empty can be adjusted to any number between 1:3.5～4 than also, and it all can play good igniting quality.
Utilize said method can ensure that coal gas and air are in the ratio of the completing combustion degree of depth surplus of mixing, prevent from lighting a fire, thereby reduce to greatest extent sintering deposit gas unit consumption.Utilize the method, at 2 × 265m
2after sintering machine application, sintering gas unit consumption can be reduced to 0.047GJ/t, reaches internal class index level, and energy-saving effect is remarkable, on similar sintering machine, has highly application value.
Claims (3)
1. a sintering ignition method for low gas unit consumption, comprising: when igniting, coal is empty than being 1:3.5～4; Bellows air quantity is controlled at 25～30% to control igniting.
2. method according to claim 1, is characterized in that, described coal is empty than being 1:3.75.
3. method according to claim 1 and 2, is characterized in that, maintains lower negative pressure 4～5kPa when igniting in bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410104983.3A CN103836645A (en) | 2014-03-20 | 2014-03-20 | Sintering ignition method with low gas unit consumption |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410104983.3A CN103836645A (en) | 2014-03-20 | 2014-03-20 | Sintering ignition method with low gas unit consumption |
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| CN103836645A true CN103836645A (en) | 2014-06-04 |
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| CN201410104983.3A Pending CN103836645A (en) | 2014-03-20 | 2014-03-20 | Sintering ignition method with low gas unit consumption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220381A (en) * | 2019-06-10 | 2019-09-10 | 成渝钒钛科技有限公司 | A kind of vanadium titanium sintering tiny structure ignition method |
Citations (8)
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| SU406884A1 (en) * | 1971-11-05 | 1973-11-21 | METHOD FOR AUTOMATIC REGULATION OF IGNITION IN A GERMULATION CHARGE | |
| JPH05134412A (en) * | 1991-11-15 | 1993-05-28 | Japan Synthetic Rubber Co Ltd | Negative resist composition |
| JPH05196368A (en) * | 1992-01-20 | 1993-08-06 | Nkk Corp | Ignition furnace for sintering and operation method thereof |
| CN1271022A (en) * | 2000-04-28 | 2000-10-25 | 张同山 | Homogeneous agglomerate sintering method and equipment |
| CN2526765Y (en) * | 2002-03-01 | 2002-12-18 | 中冶集团长沙冶金设计研究总院 | Negative pressure controller for bellows of sintering machine |
| CN101220410A (en) * | 2008-01-23 | 2008-07-16 | 山西太钢不锈钢股份有限公司 | Negative pressure sintering process for end wind box |
| CN101338364A (en) * | 2008-08-28 | 2009-01-07 | 攀枝花新钢钒股份有限公司 | Negative-pressure ignition control device for sintering iron ore |
| CN202709739U (en) * | 2012-06-08 | 2013-01-30 | 上海梅山钢铁股份有限公司 | Ignition negative-pressure control device of sintering machine |
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2014
- 2014-03-20 CN CN201410104983.3A patent/CN103836645A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| SU406884A1 (en) * | 1971-11-05 | 1973-11-21 | METHOD FOR AUTOMATIC REGULATION OF IGNITION IN A GERMULATION CHARGE | |
| JPH05134412A (en) * | 1991-11-15 | 1993-05-28 | Japan Synthetic Rubber Co Ltd | Negative resist composition |
| JPH05196368A (en) * | 1992-01-20 | 1993-08-06 | Nkk Corp | Ignition furnace for sintering and operation method thereof |
| CN1271022A (en) * | 2000-04-28 | 2000-10-25 | 张同山 | Homogeneous agglomerate sintering method and equipment |
| CN2526765Y (en) * | 2002-03-01 | 2002-12-18 | 中冶集团长沙冶金设计研究总院 | Negative pressure controller for bellows of sintering machine |
| CN101220410A (en) * | 2008-01-23 | 2008-07-16 | 山西太钢不锈钢股份有限公司 | Negative pressure sintering process for end wind box |
| CN101338364A (en) * | 2008-08-28 | 2009-01-07 | 攀枝花新钢钒股份有限公司 | Negative-pressure ignition control device for sintering iron ore |
| CN202709739U (en) * | 2012-06-08 | 2013-01-30 | 上海梅山钢铁股份有限公司 | Ignition negative-pressure control device of sintering machine |
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| 王炜等: "降低265m~2烧结机煤气消耗的对策", 《设备管理与维修》, no. 09, 30 September 2010 (2010-09-30), pages 60 - 61 * |
| 蒋大军等: "降低烧结点火能耗技术进步与实践", 《冶金能源》, vol. 33, no. 1, 28 February 2014 (2014-02-28) * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220381A (en) * | 2019-06-10 | 2019-09-10 | 成渝钒钛科技有限公司 | A kind of vanadium titanium sintering tiny structure ignition method |
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Application publication date: 20140604 |