CN101255484A - Composite cooling agent for steel-smelting and production technique thereof - Google Patents
Composite cooling agent for steel-smelting and production technique thereof Download PDFInfo
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- CN101255484A CN101255484A CNA2008100870466A CN200810087046A CN101255484A CN 101255484 A CN101255484 A CN 101255484A CN A2008100870466 A CNA2008100870466 A CN A2008100870466A CN 200810087046 A CN200810087046 A CN 200810087046A CN 101255484 A CN101255484 A CN 101255484A
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Abstract
The invention discloses a composite coolant for steelmaking and a processing technique. The composite coolant is composes of 50-70% discharged sludge, 15-30% continuous casting oxide scale, 2-6% magnesium chloride, 1-3% humic acid, 2-7% bentonite, 10-20% dust return product. Sludge and continuous casting oxide scale recovered from discharged sewage are purified, wet sludge is heat-dried to form scoriform grains on hollow iron plates, and then dried again to form raw material having 6-8% water, the raw materials are mixed in proportion and pressed to form a sphere blank, then the blank is put into a rotary kiln, preheated for 20 to 30 minutes and reheated to 900 to 1000 DEG, after 40 to 60 minutes of low temperature calcination, the final product is formed. According to the composite coolant for steelmaking, the steelmaking temperature can be adjusted flexibly and effectively, the difficult of temperature control is reduced, the smelting time is shorted, the steel yield is increased, the steelmaking cost is saved, the carbon oxygen reaction in furnace is optimized, the metal recovery rate is enhanced, the discharged pollutant is lessened, the energy-saving emission-reduction effect is improved, therefore good economical and social benefits can be obtained.
Description
Technical field
Composite cooling agent involved in the present invention especially relates to cooling agent and producing and manufacturing technique in the process for making technical field.
Background technology
In convertor steelmaking process, in order to shorten the heat, rationally attemperation accurately reaches converter tapping terminal temperature hit rate, all must use the cooling furnace charge by timely and appropriate discovery.Normally used cooling furnace charge mainly contains iron and steel scrap, machine burning ramming material, pellet ball, sintering lump ore, fluorite, Wingdale in steelmaking process at present, it is reported to also have cold-pressing balls etc.After these cooling furnace charges add steel melting furnace following point can appear in various degree: 1, prolong tap to tap time; 2, unfavorable adjusting steel-making temperature; 3, cause splash stream to decrease molten steel easily, improved iron loss relatively; 4, misoperation or add-on will definitely not cause in the stove " returning dried ", reduce recovery rate of iron, increase steel-making cost.Particularly sintering lump ore and Wingdale, because the oxygen level height can influence slag making and reaction between carbon and oxygen in the stove, increases the quantity of slag and the number of falling the heat, cold-pressing balls contains the water excess insufficient strength, easy bonding revolving furnace fume hood, fluorite then belong to acidic flux converter of basic lining are corroded obviously, add fluorite and can form shoddye, corrode furnace lining, shorten furnace life, contaminate environment damages the ozone layer.
Summary of the invention
At the cooling of using in the above-mentioned existing steel-making operation blowing, the problem of changing the residue material existence, the invention provides and a kind ofly improve output of steel, reduce iron and steel stock consumption, reduce smelting cost, improve converter lining life and help making steel the three wastes again, comprehensive cyclic utilization, energy-saving and emission-reduction, environment protection standard, composite cooling agent that increases production and improves productivity and producing and manufacturing technique.
The technical scheme that the technical problem to be solved in the present invention is taked is:
It is steel-making discharging mud (oven dry back one-tenth scoriform) that the raw material of described composite cooling agent is formed part: 50-70%, continuous casting iron scale: 15-30%, magnesium chloride: 2-6%, humic acid: 1-3%, wilkinite: 2-7%, dust returning charge: 10-20%.
Having added binding agents such as an amount of magnesium chloride, wilkinite, humic acid in the raw materials used composition of the present invention is auxiliary material, can improve the adsorptive power and the balling ratio of ferro element, on the basis that energy-saving and emission-reduction, comprehensive utilization give up, improved the ultimate compression strength of product, improved the performance of product to a certain extent, avoided discharging in products production, transportation, the use dust and cause pollution for the second time.
The producing and manufacturing technique of steel-making composite cooling agent of the present invention is:
1, will make steel after the iron scale of the mud that reclaims in the sewage of discharging and continuous casting removes impurity, put on the monolithic hollow respectively, handle through the heat up mud heating, drying that to wet of hollow steel plate internal recycle with converter steam, make the scoriform particulate material, again it is conveyed in the environment-friendly type dryer with conveyor, oven dry is to moisture 6-8% once more
2, press the above-mentioned raw materials proportioning of composite cooling agent,, be transported to again after stirrer stirs, be transported to that extrusion forming is an ellipse egg shape size spheroid blank in the ball press with feeding machine batching, the Microcomputerized blended stock that meets steel-making requirements that is combined into,
3, blank is thrown in the rotary kiln, with coal gas of converter preheating 20-30 minute, reheat became product to the 900-1000 degree through high-temperature calcination in 40-60 minute,
4, the product after the calcining is cooled off by rotary kiln screw-in cooler, sieves with cooler afterbody suit mesh screen cooling rotating speed, cools off the back of sieving and is transported to the product library of being furnished with drain hopper with chain mat machine, puts product in storage and packs, sends by customer need after the quality inspection detection is qualified.
The every physical and chemical index of composite cooling agent for steel-smelting of the present invention requires:
1, Chemical Composition: TFe:50-60%, FeO:25-35%, SiO
2: 5-8%,
S：0.1-0.15％、P：0.08-0.12％。
2, the transverse section is that the spherical composite cooling agent product of the egg shape ultimate compression strength of 50 * 40mm is 600-900N, and promptly ultimate compression strength is 0.6-0.9MPa.
3, water content: H
2O≤2%
Composite cooling agent for steel-smelting of the present invention can effectively be regulated the steel-making temperature flexibly, reduces temperature control difficulty, shorten the heat, improve output of steel, save steel-making cost, optimize reaction between carbon and oxygen in the steel melting furnace, accelerate to remove P, S speed, improve slag making, furnace retaining effect, reduce the blowing splash, improve recovery rate of iron, reduce stove, deslagging number of times, improve the converter operating rate.Make full use of the mud that is reclaimed in the steel-making effluent sewerage, reduced pollutent and effluxed, improve effects of energy saving and emission reduction, have good economic and social benefit.
Composite cooling agent of the present invention is tested through practical application, the adding composite cooling agent of the refining one heat steel timely and appropriate discovery 1-2 minute/stove of can shortening the heat, reduce steel-making cost 15-20 unit/ton steel, as if the converter that by output is 50 tons, STEELMAKING PRODUCTION was calculated in 24 hours, can improve 500 tons of output of steels every day, reduce steel-making cost and surpass more than 100,000 yuan.
Embodiment
Embodiment 1: described composite cooling agent is by 50% steel-smelting sewage sludge, 25% iron scale, and 3% magnesium chloride, 2% humic acid, 5% wilkinite and 15% dust returning charge raw material are formed, and be formulated by following method steps:
1, steel-smelting sewage sludge and iron scale are removed impurity after, be placed on the monolithic hollow respectively, with steel-making petticoat pipe steam cycle to its preheating evaporate to dryness after, again it is conveyed in the environment-friendly type dryer and dries to feed particulate material with coal gas of converter, mud, iron scale and other subsidiary material are transported in each raw material storage with the conveyor component, each raw material storage is installed the electronics feeding machine, is controlled the collocation of various raw materials by the microcomputer chamber again, being transported to stirrer with lift after raw material prepares stirs
2, stir into moisturely for 8-10%, and be added in the apparatus for making pearl ball after having the thick shape body of certain viscosity, machine is pressed into the egg shape spheroid base that appearance profile is of a size of 50 * 40mm,
3, base substrate is inserted in the rotary kiln preheating 10-20 minute post-heating to the 900-1100 degree, calcines after 40-60 minute product and enter cooler by rotary kiln automatically and cool off and sieve,
4, calcining postcooling, is after the assay was approved sent into elevated hopper transmission to be packaged with chain mat machine, originally executes the composite cooling agent that example is produced.The every physical and chemical index that is detected is:
1, Chemical Composition: TFe:54.50% FeO:32.2% SiO
2: 6.6%
S：0.11％ P：0.085％
2, ultimate compression strength is: 0.78MPa
3, water content is: 0.69%
Embodiment 2: described composite cooling agent is made up of 40% steel-smelting sewage sludge, 30% iron scale, 6% magnesium chloride, 1% humic acid, 3% wilkinite and 20% dust returning charge, and by calcining products obtained therefrom after the embodiment 1 described method steps self-control moulding.The every physical and chemical index that is detected is:
1, Chemical Composition: TFe:51.50% FeO:33.2% SiO
2: 5.3%
S：0.13％ P：0.09％
2, ultimate compression strength is: 0.89MPa
3, water content is: 1.06%
Embodiment 3: described composite cooling agent is made up of the raw material of 60% steel-smelting sewage sludge, 18% iron scale, 2% magnesium chloride, 3% humic acid, 7% wilkinite and 10% dust returning charge, and by calcining products obtained therefrom after the embodiment 1 described method steps self-control moulding.The every physical and chemical index that is detected is:
1, Chemical Composition: TFe:58.10% FeO:26.1% SiO
2: 7.4%
S：0.108％ P：0.11％
2, ultimate compression strength is: 0.86MPa
3, water content is: 1.35%
The present invention is the mud that makes full use of in the wet dedusting sewage that converter steelmaking in the three industrial wastes produces, and it is formulated to add auxiliary material such as iron scale.After in the steel-making smelting process, adding composite cooling agent, because of having increased FeO content in the stove,, " returning dried " phenomenon in smelting process, can not occur, reduce splash and deslagging, the number of falling the heat admittedly accelerate desulfurization dephosphorization when can accelerate reaction between carbon and oxygen and slag making.Composite cooling agent is neutral furnace charge flux, and water content is less than 2% (this moisture content is to want to suck in the water mist dust-removing process), joins can accelerate slag making, protection furnace lining in the alkaline steel melting furnace, improve furnace life.An amount of cooling agent that adds has the equal effect of pellet and machine burning ore deposit in iron-making production.
The present invention utilizes steel melting furnace to produce the waste heat of waste gas, the mud that will wet is tentatively dried, make finished ball, utilize the unnecessary coal gas of steel-making converter, become not fluorinated calcium through calcined by rotary kiln, the qualified product that meet steel-making requirements have been accomplished waste residue, waste gas, waste water in the comprehensive utilization three industrial wastes, energy-saving and emission-reduction, turn waste into wealth.
Claims (3)
1, composite cooling agent for steel-smelting is characterized in that: it is made up of the steel-making discharging mud (the oven dry back becomes scoriform) of 50-70%, the continuous casting iron scale of 15-30%, the magnesium chloride of 2-6%, the humic acid of 1-3%, the wilkinite of 2-7%, the dust returning charge of 10-20%.
2, composite cooling agent for steel-smelting according to claim 1 is characterized in that: it is made up of 50% steel-making discharging mud (the oven dry back becomes scoriform), 25% continuous casting iron scale, 3% magnesium chloride, 2% humic acid, 5% wilkinite, 15% dust returning charge.
3, the processing method step of the described steel-making composite cooling agent of production claim 1 is characterized in that:
After a, the iron scale of the mud that reclaims in the sewage of discharging and continuous casting of will making steel are removed impurity, put on the monolithic hollow respectively, handle through the heat up mud heating, drying that to wet of hollow steel plate internal recycle with converter steam, make the scoriform particulate material, again it is conveyed in the environment-friendly type dryer with conveyor, oven dry is to moisture 6-8% once more
B, the above-mentioned raw materials proportioning of pressing composite cooling agent with feeding machine batching, the Microcomputerized blended stock that meets steel-making requirements that is combined into, are transported to after stirrer stirs again, are transported to that extrusion forming is an ellipse egg shape size spheroid blank in the ball press,
C, blank is thrown in the rotary kiln, with coal gas of converter preheating 20-30 minute, reheat became product to the 900-1000 degree through high-temperature calcination in 40-60 minute,
Product after d, the calcining screws in the cooler cooling by rotary kiln, sieves with cooler afterbody suit mesh screen cooling rotating speed, is transported to the product library of being furnished with drain hopper with chain mat machine after cooling is sieved, the product storehouse that checks in.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100870466A CN100543150C (en) | 2008-03-27 | 2008-03-27 | Composite cooling agent for steel-smelting and producing and manufacturing technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100870466A CN100543150C (en) | 2008-03-27 | 2008-03-27 | Composite cooling agent for steel-smelting and producing and manufacturing technique |
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| CN101255484A true CN101255484A (en) | 2008-09-03 |
| CN100543150C CN100543150C (en) | 2009-09-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555540B (en) * | 2009-05-19 | 2010-10-06 | 鞍山市和丰耐火材料有限公司 | Energy conservation production method for compound temperature reduction agent used in the steel production |
| CN102918169A (en) * | 2010-04-19 | 2013-02-06 | 西门子Vai金属科技有限责任公司 | Bentonite-bonded pressed articles from fine-grain oxidic iron carriers |
| CN103131818A (en) * | 2013-02-22 | 2013-06-05 | 江苏省沙钢钢铁研究院有限公司 | Slagging agent used in converter steelmaking, and preparation method thereof |
| CN103589864A (en) * | 2013-09-17 | 2014-02-19 | 新疆金特钢铁股份有限公司 | Steelmaking converter smoke sludge and continuous casting scale ball pressing process |
| CN110028125A (en) * | 2019-04-25 | 2019-07-19 | 郑州大学 | A method of water body intermediate ion state organic matter is separated by carrier adsorption of waste residue source nanoparticle |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting and use method thereof |
-
2008
- 2008-03-27 CN CNB2008100870466A patent/CN100543150C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555540B (en) * | 2009-05-19 | 2010-10-06 | 鞍山市和丰耐火材料有限公司 | Energy conservation production method for compound temperature reduction agent used in the steel production |
| CN102918169A (en) * | 2010-04-19 | 2013-02-06 | 西门子Vai金属科技有限责任公司 | Bentonite-bonded pressed articles from fine-grain oxidic iron carriers |
| CN103131818A (en) * | 2013-02-22 | 2013-06-05 | 江苏省沙钢钢铁研究院有限公司 | Slagging agent used in converter steelmaking, and preparation method thereof |
| CN103131818B (en) * | 2013-02-22 | 2014-12-31 | 江苏省沙钢钢铁研究院有限公司 | Slagging agent used in converter steelmaking, and preparation method thereof |
| CN103589864A (en) * | 2013-09-17 | 2014-02-19 | 新疆金特钢铁股份有限公司 | Steelmaking converter smoke sludge and continuous casting scale ball pressing process |
| CN110028125A (en) * | 2019-04-25 | 2019-07-19 | 郑州大学 | A method of water body intermediate ion state organic matter is separated by carrier adsorption of waste residue source nanoparticle |
| CN110028125B (en) * | 2019-04-25 | 2021-10-29 | 郑州大学 | Method for adsorbing and separating ionic organic matters in water body by using waste residue source nanoparticles as carriers |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting and use method thereof |
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| Publication number | Publication date |
|---|---|
| CN100543150C (en) | 2009-09-23 |
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Granted publication date: 20090923 Termination date: 20140327 |