CN102787204A - Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof - Google Patents
Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof Download PDFInfo
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Abstract
The invention provides an energy-saving environmentally-friendly converter slag splashing protecting charging and a production process thereof. The converter slag splashing protecting charging comprises the following raw materials by weight: 30-50 parts of light-burnt magnesium powder, 20-30 parts of waste magnesia carbon brick, 15-30 parts of limestone, 0-5 parts of coke and 1-5 parts of active lime dust removal powder; the light-burnt magnesium powder comprises 85% of MgO or more, 1.5% of SiO2 or less, 2.0% of CaO or less and 11% of igloss; and 90% or more of the light-burnt magnesium powder with the particle size of 120mesh can be sieved; the waste magnesia carbon brick comprises 70% of MgO or more and 12% of C or more and has the particle size of 5mm or low; the limestone comprises limestone 53.5% of CaO or more, 1.5% of SiO2 or less and 0.025% of S or less and has the particle size of 16mm or lower; the coke comprises 80% of fixed carbon or more, 0.4% of S or less, less than 10% of volatile components and less than 10% of ash and has the calorific value of 6,000kcal or higher and the particle size of 10-25mm with upper and lower limits being not more than 5%; and the active lime dust removal powder comprises 80% of CaO or more and has the particle size of 1mm or lower. The converter slag splashing protecting charging is prepared by grinding the raw materials to be less than 180mesh by a stirrer and a ball grinder, granulating and drying.
Description
Technical field
The present invention relates to a kind of energy saving and environment friendly splashing slag in converter material and production technique thereof, belong to the converter lining protection technology by slag splashing field, particularly improve converter lining life, the refractory materials of protection converter lining.
Background technology
The effect of slag splashing furnace protecting material is that the converter finishing slag is carried out modification; The viscosity of the chemical ingredients in the change slag, ore deposit phase, slag, fusing point etc.; Change the character of slag; Make slag satisfy the condition of slag splashing, promptly, the HMP in the slag is increased mutually through adding slag splashing furnace protecting material to improve magnesian content in the slag; Reduce the content of iron protoxide in the slag, make slag viscosity suitable, be easy to the slag splash to furnace lining, the slag that splashes on the furnace lining can combine with furnace lining well, and has certain high temperature resistance erosional competency.
At present, Iron And Steel Company reduces steel-making cost in order to improve converter lining life, extensively adopts Technology of Slag Splashingfor Furnace Maintenance.The slag splashing furnace protecting material that generally uses mainly contains three kinds.Method one: in converter, add unprocessed dolomite or light dolomite as slag splashing furnace protecting material; Method two: in converter, add calcined magnesite ball as slag splashing furnace protecting material; Method three: in converter, add common modifying material as slag splashing furnace protecting material.The shortcoming of method one is that magnesium, the calcium contents in the slag is high, and main mine does not change mutually, and the fusing point of slag does not improve, the furnace retaining weak effect.The shortcoming of method two is that to spatter slag too single, can only improve the Mg content in the slag basically, and the viscosity of slag is wayward, is unfavorable for spattering slag operation.The shortcoming of method three is that production cost is high, consumes more light-burning magnesium powder raw material resources, and product needs through 100-200 ℃ of drying kiln oven dry, and energy consumption is big.
At present, converter lining protection technology by slag splashing is extensively adopted by each steel mill.Converter lining life rises to the 4000-14000 stove by original 1000-3000 stove, is up to more than 30000 stoves.
Converter lining protection technology by slag splashing routine operation method is after converter has gone out molten steel, stays the part slag.Like method two; In slag, add the slag splashing furnace protecting material that contains MgO slag is carried out modification; Adopt oxygen lance spraying to blow high pressure nitrogen, in 2-4 minutes, modification slag splash in the stove is coated on the whole surface of converter lining, generate and spatter the flux shielding layer; Next stove is smelted the effect of playing the protection furnace lining, improve converter lining life.
Summary of the invention
The purpose of this invention is to provide a kind of energy saving and environment friendly splashing slag in converter material and production technique thereof, both reduced production costs, the environmental pollution of alleviating is arranged, need not to use special drying kiln, save energy simultaneously.
Technical scheme of the present invention: a kind of energy saving and environment friendly splashing slag in converter material of the present invention; Wherein various raw materials in part by weight proportionings are: light-burning magnesium powder 30～50, with back waste magnesia carbon brick 20～30, Wingdale 15～30; Coke 0～5, quickened lime dust-removing powder 1～5.
MgO in the described light-burning magnesium powder>=85%, SiO
2≤1.5%, CaO≤2.0%, igloss≤11%, the granularity 120 order amounts of sieving of light-burning magnesium powder are no less than 90%; With MgO>=70% in the rear converter waste magnesia carbon brick, C>=12%, granularity≤5mm; CaO in the Wingdale>=53.5%, SiO
2≤1.5%, S≤0.025%, granularity≤16mm; Fixed carbon in the coke>=80%, S≤0.4%, fugitive constituent<10%, ash<10%, calorific value>=6000 kilocalories, granularity 10 ~ 25mm, bound respectively is no more than 5%; CaO in the quickened lime dust-removing powder>=80%, granularity≤1mm.
Preferably, various raw materials in part by weight proportionings are: light-burning magnesium powder 35～50, and with back waste magnesia carbon brick 25～30, Wingdale 20～30, coke 1～3, quickened lime dust-removing powder 3～5.
Preferably, various raw materials in part by weight proportionings are: light-burning magnesium powder 40～45, and with back waste magnesia carbon brick 25～30, Wingdale 23～24, coke 2～3, quickened lime dust-removing powder 3～5.
Preferably, various raw materials in part by weight proportionings are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 30, Wingdale 23, coke 2, quickened lime dust-removing powder 5.
Preferably, various raw materials in part by weight proportionings are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 35, Wingdale 23, coke 2, quickened lime dust-removing powder 5.
The production technique of a kind of energy saving and environment friendly splashing slag in converter material of the present invention, step is:
1) mixes doing in the disposable input stirrer of raw material according to one of claim 1～6, mix the back discharging;
2) material of mixing is sent into be milled in the ball mill less than discharging behind 180 orders;
3) will join continuously in the pan-pelletizer through oscillating feeder less than 180 purpose fine powders, the service water of adding 8 ~ 12% is processed the particle that satisfies customer requirements;
4) place the stockyard, dried naturally 2-3 days.
Advantage of the present invention: existing common modifying material production cost is high, consumes more light-burning magnesium powder and carbon dust raw material resources, and product needs through 100-200 ℃ of drying kiln oven dry.
The present invention adopts steel mill with rear converter waste magnesia carbon brick instead of part light-burning magnesium powder; Can practice thrift the light-burning magnesium powder resource on the one hand; On the other hand steel mill is carried out recycling with the back waste magnesia carbon brick; Make full use of useful components such as wherein Natural manganese dioxide and carbon, both reduced production cost and also alleviated environmental pollution; Through adding the quickened lime dust-removing powder, utilize its reaction liberated heat that product is carried out the nature oven dry simultaneously, need not to use special drying kiln, practiced thrift the energy.
After environment-friendly type slag splashing furnace protecting material of the present invention spattered slag, magnesian content was easy to adjustment in the slag, and the modest viscosity of slag has been improved and spattered the slag effect, and iron loss is little, and it is good to hang the slag blanket wearing quality, thereby improves the converter lining situation, prolonged furnace lining work-ing life.
It is low that the energy saving and environment friendly slag splashing furnace protecting material of the present invention has a production cost, can reduce cost 220 yuan/ton, and save energy, helps environment protection.
Embodiment
A kind of energy saving and environment friendly splashing slag in converter material of the present invention, wherein various raw materials in part by weight proportionings are: light-burning magnesium powder 30～50, with back waste magnesia carbon brick 20～30, Wingdale 15～30, coke 0～5, quickened lime dust-removing powder 1～5.
MgO in the described light-burning magnesium powder>=85%, SiO
2≤1.5%, CaO≤2.0%, igloss≤11%, the granularity 120 order amounts of sieving of light-burning magnesium powder are no less than 90%; With MgO>=70% in the rear converter waste magnesia carbon brick, C>=12%, granularity≤5mm; CaO in the Wingdale>=53.5%, SiO
2≤1.5%, S≤0.025%, granularity≤16mm; Fixed carbon in the coke>=80%, S≤0.4%, fugitive constituent<10%, ash<10%, calorific value>=6000 kilocalories, granularity 10 ~ 25mm, bound respectively is no more than 5%; CaO in the quickened lime dust-removing powder>=80%, granularity≤1mm.
The production technique of a kind of energy saving and environment friendly splashing slag in converter material of the present invention, step is:
1) mixes doing in the disposable input stirrer of raw material according to one of claim 1～6, mix the back discharging;
2) material of mixing is sent into be milled in the ball mill less than discharging behind 180 orders;
3) will join continuously in the pan-pelletizer through oscillating feeder less than 180 purpose fine powders, the service water of adding 8 ~ 12% is processed the particle that satisfies customer requirements;
4) place the stockyard, dried naturally 2-3 days.
Instance one: various proportion of raw materials scopes are: light-burning magnesium powder 35, and with back waste magnesia carbon brick 50, Wingdale 10, quickened lime dust-removing powder 5.This routine cost is minimum, but the balling-up weak effect, the balling-up granularity is less than normal, and yield is lower.
Instance two: various proportion of raw materials scopes are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 30, Wingdale 23, coke 2, quickened lime dust-removing powder 5.This routine cost is low, produces to be easy to control, and result of use is better.
Instance three: various proportion of raw materials scopes are: light-burning magnesium powder 45, and with back waste magnesia carbon brick 25, Wingdale 24, coke 3, quickened lime dust-removing powder 3.This routine cost is higher.
Instance four: various proportion of raw materials scopes are: light-burning magnesium powder 50, and with back waste magnesia carbon brick 25, Wingdale 19, coke 3, quickened lime dust-removing powder 3.This routine cost is higher, and extension slag blanket wearing quality is general.
Instance five: various proportion of raw materials scopes are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 35, Wingdale 18, coke 2, quickened lime dust-removing powder 5.This routine cost is lower, produces to be easy to control, and result of use is better.
The producing and manufacturing technique of above-mentioned instance is: above-mentioned raw materials is pressed the proportion speed weighing, in the disposable input forced stirrer of confected materials, do and mixed 3～5 minutes, mix the back discharging; The material of mixing is sent into tube mill grind, discharging-material size requirement≤0.088mm part>=60%; The ground material joins the pan-pelletizer balling-up continuously through oscillating feeder, adds an amount of service water during balling-up, processes the particle size that satisfies customer requirements; Place the stockyard, dry 2 ~ 3 days naturally after, can mail to the user.
Above-mentioned example detection result is following:
Use the result: the finishing slag iron level can reduce about 5%, and Mg content can increase about 3%, and it is respond well that furnace lining is hung slag, and extension slag blanket wearing quality is good.
Core of the present invention is to adopt steel mill with rear converter waste magnesia carbon brick instead of part light-burning magnesium powder and adding quickened lime dust-removing powder, reaches the purpose that economizes on resources, reduces production costs, alleviates environmental pollution.Therefore, every various technical schemes that developed by the present invention all belong to protection scope of the present invention.
Claims (7)
1. energy saving and environment friendly splashing slag in converter material, wherein various raw materials in part by weight proportionings are: light-burning magnesium powder 30～50, with back waste magnesia carbon brick 20～30, Wingdale 15～30, coke 0～5, quickened lime dust-removing powder 1～5.
2. energy saving and environment friendly splashing slag in converter material according to claim 1 is characterized in that: MgO in the light-burning magnesium powder>=85%, SiO
2≤1.5%, CaO≤2.0%, igloss≤11%, the granularity 120 order amounts of sieving of light-burning magnesium powder are no less than 90%; With MgO>=70% in the rear converter waste magnesia carbon brick, C>=12%, granularity≤5mm; CaO in the Wingdale>=53.5%, SiO
2≤1.5%, S≤0.025%, granularity≤16mm; Fixed carbon in the coke>=80%, S≤0.4%, fugitive constituent<10%, ash<10%, calorific value>=6000 kilocalories, granularity 10 ~ 25mm, bound respectively is no more than 5%; CaO in the quickened lime dust-removing powder>=80%, granularity≤1mm.
3. energy saving and environment friendly splashing slag in converter material according to claim 1 and 2; It is characterized in that: various raw materials in part by weight proportionings are: light-burning magnesium powder 35～50, with back waste magnesia carbon brick 25～30, Wingdale 20～30; Coke 1～3, quickened lime dust-removing powder 3～5.
4. energy saving and environment friendly splashing slag in converter material according to claim 1 and 2; It is characterized in that: various raw materials in part by weight proportionings are: light-burning magnesium powder 40～45, with back waste magnesia carbon brick 25～30, Wingdale 23～24; Coke 2～3, quickened lime dust-removing powder 3～5.
5. energy saving and environment friendly splashing slag in converter material according to claim 1 and 2 is characterized in that: various raw materials in part by weight proportionings are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 30, Wingdale 23, coke 2, quickened lime dust-removing powder 5.
6. energy saving and environment friendly splashing slag in converter material according to claim 1 and 2 is characterized in that: various raw materials in part by weight proportionings are: light-burning magnesium powder 40, and with back waste magnesia carbon brick 35, Wingdale 23, coke 2, quickened lime dust-removing powder 5.
7. the production technique of an energy saving and environment friendly splashing slag in converter material, step is:
1) mixes doing in the disposable input stirrer of raw material according to one of claim 1～6, mix the back discharging;
2) material of mixing is sent into be milled in the ball mill less than discharging behind 180 orders;
3) will join continuously in the pan-pelletizer through oscillating feeder less than 180 purpose fine powders, the service water of adding 8 ~ 12% is processed the particle that satisfies customer requirements;
4) place the stockyard, dried naturally 2-3 days.
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| CN201210301916.1A CN102787204B (en) | 2012-08-23 | 2012-08-23 | Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof |
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| CN201210301916.1A CN102787204B (en) | 2012-08-23 | 2012-08-23 | Energy-saving environmentally-friendly converter slag splashing protecting charging and production process thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103484595A (en) * | 2013-09-17 | 2014-01-01 | 新疆中合大正商贸有限公司 | Production process of magnesian slag pressing agents |
| CN103602776A (en) * | 2013-11-29 | 2014-02-26 | 武汉钢铁(集团)公司 | Slag conditioning method for converter slag-splashing converter-protection technology |
| CN103602777A (en) * | 2013-12-09 | 2014-02-26 | 攀枝花顺腾集团冶金材料有限公司 | Slag splashing furnace protecting material and preparation method thereof |
| CN106319140A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | Energy-saving environment-friendly converter slag splashing regulator and preparation method thereof |
| CN106544464A (en) * | 2016-10-31 | 2017-03-29 | 湛江盛宝科技有限公司 | Environment-friendly type splashing slag in converter material and preparation method thereof |
| CN107164600A (en) * | 2017-05-08 | 2017-09-15 | 河钢股份有限公司承德分公司 | The method of semi-steel making slag splashing |
| CN110157859A (en) * | 2019-04-18 | 2019-08-23 | 河钢股份有限公司承德分公司 | Finishing slag adjusting material and its application method for semisteel smelting splashing slag in converter |
| CN116854492A (en) * | 2023-07-25 | 2023-10-10 | 湖南湘钢瑞泰科技有限公司 | Method for recycling magnesium-containing mixed waste brick slag |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103484595A (en) * | 2013-09-17 | 2014-01-01 | 新疆中合大正商贸有限公司 | Production process of magnesian slag pressing agents |
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| CN106319140A (en) * | 2015-06-29 | 2017-01-11 | 鞍钢股份有限公司 | Energy-saving environment-friendly converter slag splashing regulator and preparation method thereof |
| CN106544464A (en) * | 2016-10-31 | 2017-03-29 | 湛江盛宝科技有限公司 | Environment-friendly type splashing slag in converter material and preparation method thereof |
| CN107164600A (en) * | 2017-05-08 | 2017-09-15 | 河钢股份有限公司承德分公司 | The method of semi-steel making slag splashing |
| CN107164600B (en) * | 2017-05-08 | 2019-04-09 | 河钢股份有限公司承德分公司 | The method of semi-steel making slag splashing |
| CN110157859A (en) * | 2019-04-18 | 2019-08-23 | 河钢股份有限公司承德分公司 | Finishing slag adjusting material and its application method for semisteel smelting splashing slag in converter |
| CN116854492A (en) * | 2023-07-25 | 2023-10-10 | 湖南湘钢瑞泰科技有限公司 | Method for recycling magnesium-containing mixed waste brick slag |
| CN116854492B (en) * | 2023-07-25 | 2024-10-15 | 湖南湘钢瑞泰科技有限公司 | Method for recycling magnesium-containing mixed waste brick slag |
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