CN101830648A - Method for thermally stewing carbon steel slag - Google Patents
Method for thermally stewing carbon steel slag Download PDFInfo
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- CN101830648A CN101830648A CN 201010188932 CN201010188932A CN101830648A CN 101830648 A CN101830648 A CN 101830648A CN 201010188932 CN201010188932 CN 201010188932 CN 201010188932 A CN201010188932 A CN 201010188932A CN 101830648 A CN101830648 A CN 101830648A
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Abstract
The invention relates to a method for thermally stewing carbon steel slag. The method comprises the following steps in turn: 1, filling high-temperature waste steel slag of 1,000 to 1,600 DEG C into a thermal stewing pool, placing the steel slag in the thermal stewing pool for 8 to 10 minutes, covering an upper cover on the thermal stewing pool, continuously spraying water to the steel slag by using a water spray device of the upper cover at water supply flow of 19 to 21m<3>/h for 145 to 155 minutes, and thermally stewing the steel slag for 25 to 35 minutes by using self heat steam after the water supply is finished; 2, supplying water to the steel slag at the water supply flow of 24 to 26m<3>/h for 170 to 190 minutes, continuously spraying water to the steel slag, and thermally stewing the steel slag for 50 to 60 minutes by using heat steam after the water supply is finished; and 3, supplying water to the steel slag at the water supply flow of 15 to 21m<3>/h for 50 to 60 minutes, continuously spraying water to the steel slag, and thermally stewing the steel slag for 60 +/- 2 minutes by using waste heat after the water supply is finished. The method for thermally stewing the carbon steel slag has the advantages of small water spray amount and shorter water spray period.
Description
Technical field
The present invention relates to the stewing treatment process of superloy slag heat.
Background technology
Slag heat is stewing to be present domestic state-of-the-art slag treatment process, and the stewing method of the heat that present domestic steel mill adopts has: tray hot application water quenching, slag case hot application method, drum process etc.The stewing technology of applicant processing factory carbon steel slag heat, that the high temperature steel slag that each steel mill is transported to the slag field is packed in the stewing pond of heat, slag is added a cover after the even heat in the pond, the water injector that utilizes the stewing pond of heat to cover, interrupted water spray, make slag stewing lower in the steaming of vapours, produce physics, chemical change, reach the crisp broken and physics of slag, the purpose of chemical breakdown.The technology of fetching water in the stewing operation of slag heat is the key link that whole slag is handled line.The stewing process for producing line of carbon steel slag heat adopts is the first unit of establishing China capital smelting construction project six steps that the stewing feedwater of heat are divided into six steps of contracting Co., Ltd and providing facture of fetching water: the about 260t of every pond dress quantity of slag; A stewing cycle of heat is 12 hours, and the amount of fetching water is 180m
3This technology of fetching water is because the stewing cycle of heat is long, and have enough to meet the need not open in the stewing pond of heat, has approximately 40% the direct entrucking of carbon steel slag to efflux, and the goods yard is usually accumulation also.Slag water content after heat is stewing is extremely inhomogeneous, and top is excessively wet, bottom overdrying even red slag, processes to next procedure and brings very big difficulty.
Summary of the invention
The present invention is intended to overcome the above-mentioned deficiency of the stewing processing method of existing carbon steel slag heat, provides the carbon steel slag heat that a kind of injection flow rate is little, the water spray cycle is short stewing processing method.
The stewing processing method of this carbon steel slag heat comprises following step successively:
The first step
1000～1600 ℃ the 290t high temperature steel slag that is no less than is packed in the stewing pond of heat, slag was placed 8～10 minutes in the stewing pond of heat, treat in the stewing pond of heat everywhere steel slag temperature basic evenly after, close the lid in the stewing pond of heat, utilize the water injector of loam cake, continue water spray, feedwater flow is set at 19～21m
3/ h, utilizes the vapours heat that self produces to boil in a covered pot over a slow fire 25～35 minutes at 145～155 minutes feedwater time after feedwater finishes.
Second step
When fetching water, feedwater flow is set at 24～26m
3/ h, the feedwater time is 170～190 minutes, continues water spray.After finishing, feedwater utilizes stewing 50～60 minutes of hot steam heat.
The 3rd step
When fetching water, feedwater flow is set at 15～21m
3/ h, the feedwater time is 50～60 minutes, (according to the feedwater flow and the time equalization in first and second step, the maintenance slag water ratio is constant) continues water spray.After finishing, feedwater utilizes stewing 60 ± 2 minutes of waste heat heat.
Take off to cover behind the stewing end cycle of heat and slag tap, the carbon steel slag after the stewing processing of heat is discharged the blanking bin of packing into from the stewing pond of heat enter the magnetic separation system processing.
To choose following value effect better the flow of water and feedwater time and stewing time of heat in the stewing processing method of this carbon steel slag heat:
The first step
Feedwater flow is set at 20m
3/ h, the feedwater time is 150 minutes, utilizes the hot steam heat that self produces to boil in a covered pot over a slow fire after feedwater finishes 30 minutes.
Second step
When fetching water, feedwater flow is set at 25m
3/ h, the feedwater time is 180 minutes, continues water spray.After finishing, feedwater utilizes stewing 60 minutes of hot steam heat.
The 3rd step
When fetching water, feedwater flow is set at 20m
3/ h, the feedwater time is 60 minutes, continues water spray.After finishing, feedwater utilizes stewing 60 minutes of waste heat heat.
The stewing processing method of this carbon steel slag heat changed for six steps into three steps, had reduced the hot stewing cycle, had improved disposal ability.Simple to operate, alleviated the operative employee's that fetches water labour intensity; The bulk slag is basic crisp broken, and slag Pulverization ratio (≤200mm steel-making slag powder) reaches more than 90%; Slag processing rate height, slag, steel separate thoroughly, and the steel scrap rate of recovery is also high; Slag water ratio 8%～15% after heat is stewing, and moisture distribution is more even, has alleviated the dust pollution of slag in the magnetic separation system.Every pond dress quantity of slag is increased to 300t by 260t, has increased treatment capacity, has improved processing power; A stewing cycle of heat was reduced to 9 hours by 12 hours, and the stewing cycle of heat shortens 3 hours, has accelerated hot stewing pond turnover rate; The amount of fetching water is by 180m
3Be reduced to 145m
3, having reduced energy consumption, ton slag water consumption is used 0.21m less
3But, the about 630t of water saving every day, can save 80 the whole year surplus ten thousand yuan.
Embodiment
Describe the specific embodiment that this carbon steel slag heat is boiled in a covered pot over a slow fire processing method in detail below in conjunction with embodiment, but the mode of specifically executing of the stewing processing method of this carbon steel slag heat is not limited to following embodiment.
Embodiment
What present embodiment was handled is carbon steel slag, and the dress quantity of slag in the stewing pond of heat is 300t.
The stewing processing method of this carbon steel slag heat comprises following step successively:
The first step
The high temperature steel slag of 1000～1600 ℃ of about 300t is packed in the stewing pond of 2# heat, and slag was placed 10 minutes in the stewing pond of heat, treat in the stewing pond of heat everywhere steel slag temperature basic evenly after, close the lid in the stewing pond of heat, utilize the water injector of loam cake, continue water spray, feedwater flow is set at 20m
3/ h, the feedwater time is 150 minutes, utilizes stewing 30 minutes of vapours heat after feedwater finishes.
Second step
Feedwater flow is set at 25m
3/ h, the feedwater time is 180 minutes, continues water spray.After finishing, feedwater utilizes stewing 60 minutes of hot steam heat.
The 3rd step
Feedwater flow is set at 20m
3/ h, the feedwater time is 60 minutes, continues water spray.After finishing, feedwater utilizes stewing 60 minutes of waste heat heat.
Take off lid behind the stewing end cycle of heat and slag tap, the carbon steel slag after the stewing processing of heat is discharged from the stewing pond of heat, the blanking bin of packing into enters magnetic separation system and processes.
Claims (2)
1. superloy slag heat is boiled in a covered pot over a slow fire treatment process, and it comprises following sequential steps:
The first step
1000～1600 ℃ the 290t high temperature steel slag that is no less than is packed in the stewing pond of heat, and slag was placed 8～10 minutes in the stewing pond of heat, closed the lid in the stewing pond of heat, utilized the water injector of loam cake, continued water spray, and feedwater flow is set at 19～21m
3/ h, utilizes the vapours heat that self produces to boil in a covered pot over a slow fire 25～35 minutes at 145～155 minutes feedwater time after feedwater finishes;
Second step
When fetching water, feedwater flow is set at 24～26m
3/ h, the feedwater time is 170～190 minutes, continues water spray; After finishing, feedwater utilizes stewing 50～60 minutes of hot steam heat;
The 3rd step
When fetching water, feedwater flow is set at 15～21m
3/ h, the feedwater time is 50～60 minutes, continues water spray, utilizes stewing 60 ± 2 minutes of waste heat heat after feedwater finishes.
2. carbon steel slag heat according to claim 1 is boiled in a covered pot over a slow fire processing method, it is characterized in that: the stewing time of the flow of water and feedwater time and heat is chosen following value:
The first step
Feedwater flow is set at 20m
3/ h, the feedwater time is 150 minutes, utilizes the hot steam heat that self produces to boil in a covered pot over a slow fire after feedwater finishes 30 minutes;
Second step
When fetching water, feedwater flow is set at 25m
3/ h, the feedwater time is 180 minutes, continues water spray, utilizes stewing 60 minutes of hot steam heat after feedwater finishes;
The 3rd step
When fetching water, feedwater flow is set at 20m
3/ h, the feedwater time is 60 minutes, continues water spray, utilizes stewing 60 minutes of waste heat heat after feedwater finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010188932 CN101830648A (en) | 2010-05-28 | 2010-05-28 | Method for thermally stewing carbon steel slag |
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| CN 201010188932 CN101830648A (en) | 2010-05-28 | 2010-05-28 | Method for thermally stewing carbon steel slag |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956033A (en) * | 2010-10-13 | 2011-01-26 | 山西太钢不锈钢股份有限公司 | Method for improving pulverization and recovery rate of steel slag |
| CN103397120A (en) * | 2013-07-26 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Hot braising method for phosphorus removed slag and carbon removed slag |
| CN108913826A (en) * | 2018-07-19 | 2018-11-30 | 武钢集团昆明钢铁股份有限公司 | A method of f-CaO in the stewing resolution steel slag of immersion heat |
| CN111926128A (en) * | 2020-08-05 | 2020-11-13 | 首钢京唐钢铁联合有限责任公司 | Steel slag hot-braising water-cooling control method |
| CN112679118A (en) * | 2020-12-28 | 2021-04-20 | 日照钢铁控股集团有限公司 | Steel slag micro powder with weak slow-setting characteristic and production method thereof |
| CN114276031A (en) * | 2022-01-04 | 2022-04-05 | 江苏省沙钢钢铁研究院有限公司 | Preparation method of steel slag for road engineering |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220399A (en) * | 2008-01-29 | 2008-07-16 | 济南鲍德炉料有限公司 | Technique for heating liquid steel scoria |
-
2010
- 2010-05-28 CN CN 201010188932 patent/CN101830648A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220399A (en) * | 2008-01-29 | 2008-07-16 | 济南鲍德炉料有限公司 | Technique for heating liquid steel scoria |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956033A (en) * | 2010-10-13 | 2011-01-26 | 山西太钢不锈钢股份有限公司 | Method for improving pulverization and recovery rate of steel slag |
| CN103397120A (en) * | 2013-07-26 | 2013-11-20 | 首钢京唐钢铁联合有限责任公司 | Hot braising method for phosphorus removed slag and carbon removed slag |
| CN103397120B (en) * | 2013-07-26 | 2015-07-08 | 首钢京唐钢铁联合有限责任公司 | Hot braising method for phosphorus removed slag and carbon removed slag |
| CN108913826A (en) * | 2018-07-19 | 2018-11-30 | 武钢集团昆明钢铁股份有限公司 | A method of f-CaO in the stewing resolution steel slag of immersion heat |
| CN111926128A (en) * | 2020-08-05 | 2020-11-13 | 首钢京唐钢铁联合有限责任公司 | Steel slag hot-braising water-cooling control method |
| CN112679118A (en) * | 2020-12-28 | 2021-04-20 | 日照钢铁控股集团有限公司 | Steel slag micro powder with weak slow-setting characteristic and production method thereof |
| CN112679118B (en) * | 2020-12-28 | 2022-08-23 | 日照钢铁控股集团有限公司 | Steel slag micro powder with weak slow-setting characteristic and production method thereof |
| CN114276031A (en) * | 2022-01-04 | 2022-04-05 | 江苏省沙钢钢铁研究院有限公司 | Preparation method of steel slag for road engineering |
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Application publication date: 20100915 |