CN103451348A - Direct reduction method for producing medium-and-low-carbon manganese-iron alloy - Google Patents
Direct reduction method for producing medium-and-low-carbon manganese-iron alloy Download PDFInfo
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- CN103451348A CN103451348A CN2013103380188A CN201310338018A CN103451348A CN 103451348 A CN103451348 A CN 103451348A CN 2013103380188 A CN2013103380188 A CN 2013103380188A CN 201310338018 A CN201310338018 A CN 201310338018A CN 103451348 A CN103451348 A CN 103451348A
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Abstract
The invention discloses a direct reduction method for producing a medium-and-low-carbon manganese-iron alloy. The invention aims to provide a direct reduction method for producing a medium-and-low-carbon manganese-iron alloy. The method is characterized by comprising the following steps: A, mixing manganese ores, blind coal and limestone, putting into a pulverizer, and pulverizing to 100-120 meshes; B, briquetting the pulverized mixture obtained in the step A, and drying at 200-300 DEG C; C, putting the briquettes obtained in the step B on a distribution vehicle, feeding into a tunnel type reducing furnace, and performing high-temperature reduction roasting with coal gas at 1140-1180 DEG C for 150-180 minutes; and D, throwing the reduction roasting briquettes obtained in the step C into an electric furnace, and smelting to obtain the product medium-and-low-carbon manganese-iron alloy and furnace slag, wherein the furnace slag is transferred to serve as a raw material of cement. The method is mainly used for production of a medium-and-low-carbon manganese-iron alloy.
Description
Technical field
The present invention relates to a kind of direct-reduction process, relate in particular to a kind of direct-reduction process of producing the medium-low carbon ferromanganese alloy.
Background technology
The method of traditional mode of production medium-low carbon ferromanganese alloy has three kinds: a kind of is electro-silicothermic process, first manganese ore is smelted into to rich manganese slag → smelt into silicomanganese → add the again mixing one-tenth medium-low carbon ferromanganese of rich manganese slag alloy; The second is to prepare the medium-low carbon ferromanganese alloy with the high carbon ferromanganese oxygen decarburization; The third is electrolytic process; Its shortcoming of first method is the rate of recovery of long flow path, manganese low (only 55% left and right); The shortcoming of second method is that in the high carbon ferromanganese production process, pollution is large, high to the raw materials quality requirement, energy consumption is large; The shortcoming of the third electrolytic process is that seriously polluted, welding, production cost are high.
Summary of the invention
The object of the present invention is to provide a kind of direct-reduction process of producing the medium-low carbon ferromanganese alloy, to overcome above-mentioned shortcoming.
For achieving the above object, technical solution of the present invention is: a kind of direct-reduction process of producing the medium-low carbon ferromanganese alloy is characterized in that following steps:
A. after manganese ore, hard coal, Wingdale being mixed, drop in pulverizer and be crushed to the 100-120 order;
B. the ground mixt that steps A obtained is pressed after group 200-300 ℃ of oven dry;
C. agglomerate step B obtained is placed on charge car sends into the tunnel like reduction furnace, with coal gas, carries out the high temperature reduction roasting, and temperature is 1140-1180 ℃, and the time is 150-180 minute;
D. reducing roasting agglomerate step C obtained drops into electrosmelting and obtains product medium-low carbon ferromanganese alloy and slag, and slag send makes cement raw material.
The invention has the beneficial effects as follows: 1. the total yield of manganese metal is greater than 90%, considerably beyond the yield of traditional method.Whole process pollution-free, meet environmental requirement.3. Production Flow Chart is short, the disposable the finished product that directly obtain.4. the product foreign matter content is low: S ﹤ 0.03%, and C ﹤ 2%, Si ﹤ 0.15%, other ﹤ 0.5%, quality meets national standard.
The accompanying drawing explanation
Accompanying drawing is process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention and embodiment thereof are described in further detail.
The invention is characterized in following steps:
A. after manganese ore, hard coal, Wingdale being mixed, drop in pulverizer and be crushed to the 100-120 order;
B. the ground mixt that steps A obtained is pressed after group 200-300 ℃ of oven dry;
C. agglomerate step B obtained is placed on charge car sends into the tunnel like reduction furnace, with coal gas, carries out the high temperature reduction roasting, and temperature is 1140-1180 ℃, and the time is 150-180 minute;
D. reducing roasting agglomerate step C obtained drops into electrosmelting and obtains product medium-low carbon ferromanganese alloy and slag, and slag send makes cement raw material.
The chemical equation related in the tunnel like reduction furnace is as follows:
(1) 2MnO
2+ CO=Mn
2o
3+ CO
2(the MnO in 480 ℃ of lower manganese ores
2with reacting of CO in coal gas).
(2) 3Mn
2o
3+ CO=2Mn
3o
4+ CO
2(950 ℃ of lower Mn
2o
3with reacting of CO in coal gas).
(3) Mn
3o
4+ CO=3MnO+CO
2(1180 ℃ of lower Mn
3o
4with reacting of CO in coal gas)
(4) 3MnO+4C=Mn
3c+3CO (1140 ℃ of lower MnO react with C's in hard coal).
(5) Mn
3c+CO
2=3Mn+2CO (1100 ℃ of lower Mn
3cO in C and continuous tunnel furnace
2reaction).
(6) Fe
2o
3+ CO=2FeO+CO
2(the Fe in manganese ore
2o
3with the CO in continuous tunnel furnace, react).
(7) FeO+C=Fe+CO (960 ℃ of lower FeO react with the C without in coal smoke).
(8)
(thermolysis under 1100 ℃ in continuous tunnel furnace).
(9) CaO+SiO
2=CaSiO
3(1100 ℃ of left and right slag making in continuous tunnel furnace).
The Mn of reaction (5) output becomes spongy medium-low carbon ferromanganese alloy with the Fe symbiosis in agglomerate, then drops into electric furnace be smelted into final product---medium-low carbon ferromanganese alloy, SiO under 1250 ℃
2, MgO, CaO, Al
2o
3enter smelting slag in groceries.Add Wingdale and be for slag making when the melting.And can improve the CO in continuous tunnel furnace
2concentration.Below provide embodiments of the invention.
Example 1
(1) material composition
(2) batching:
It is that 17kg(hard coal utilization ratio is 90% that Mn in the 100kg manganese ore is reduced required anthracitic weight);
It is that 3kg(hard coal utilization ratio is 90% that Fe in the 100kg manganese ore is reduced required anthracitic weight);
Therefore it is 20kg that the Mn in the 100kg manganese ore and Fe are reduced required anthracitic gross weight.
SiO in the 100kg manganese ore
2the weight of the required Wingdale of slag making is that 23kg(selection basicity of slag is 1.4).The consumption of above-mentioned hard coal and Wingdale is to calculate and suitable excessive configuration according to material composition and equation (4), (7), (8), (9).
(3) step:
A. the manganese ore 100kg of mentioned component, hard coal 20kg, Wingdale 23kg are dropped in pulverizer and be crushed to 120 orders, obtain mixture;
B. mixture steps A obtained is dried to moisture<3% after pressing group under 200 ℃;
C. oven dry agglomerate step B obtained is placed on charge car and send the tunnel like reduction furnace, with the coal gas high-temperature reduction, fuses, and temperature is 1140 ℃, and the time is 150 minutes;
D. the agglomerate after step C reducing roasting is dropped into to electrosmelting, temperature is 1250 ℃, obtains product medium-low carbon ferromanganese alloy and slag, and slag send makes cement raw material.
Example 2
Manganese ore, hard coal, Wingdale co-grinding to 100 order, agglomerate is dried under 300 ℃, and the maturing temperature in the tunnel like reduction furnace is 1180 ℃, and roasting time is 180 minutes, and all the other are with example 1.
Example 3
Manganese ore, hard coal, Wingdale co-grinding to 110 order, agglomerate is dried under 250 ℃, and the maturing temperature in the tunnel like reduction furnace is 1160 ℃, and roasting time is 160 minutes, and all the other are with example 1.
Manganese ore, hard coal, Wingdale are local rural area and buy use after chemical examination.
Claims (1)
1. a direct-reduction process of producing the medium-low carbon ferromanganese alloy is characterized in that following steps:
A. after manganese ore, hard coal, Wingdale being mixed, drop in pulverizer and be crushed to the 100-120 order;
B. the ground mixt that steps A obtained is pressed after group 200-300 ℃ of oven dry;
C. agglomerate step B obtained is placed on charge car sends into the tunnel like reduction furnace, with coal gas, carries out the high temperature reduction roasting, and temperature is 1140-1180 ℃, and the time is 150-180 minute;
D. reducing roasting agglomerate step C obtained drops into electrosmelting and obtains product medium-low carbon ferromanganese alloy and slag, and slag send makes cement raw material.
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|---|---|---|---|
| CN2013103380188A CN103451348A (en) | 2013-08-06 | 2013-08-06 | Direct reduction method for producing medium-and-low-carbon manganese-iron alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367647A (en) * | 2016-09-05 | 2017-02-01 | 中南大学 | Method for preparing high-carbon ferromanganese through gas-based reduction of ferromanganese oxide |
| CN106430196A (en) * | 2016-09-05 | 2017-02-22 | 中南大学 | Method for preparing manganese carbide by gas-based reduction of manganese oxides |
| CN106756346A (en) * | 2016-11-28 | 2017-05-31 | 江苏大学 | A kind of method that high carbon ferromanganese prepares low-carbon ferromanganese |
| CN114959320A (en) * | 2021-12-27 | 2022-08-30 | 吉铁铁合金有限责任公司 | Production method of low-nitrogen low-boron low-phosphorus low-carbon ferromanganese |
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| CN102382977A (en) * | 2011-09-30 | 2012-03-21 | 中南大学 | Production technology of preparing manganeisen from low grade manganese mine |
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| CN102643942A (en) * | 2012-04-16 | 2012-08-22 | 沈阳博联特熔融还原科技有限公司 | Reduction kiln equipment and method for directly reducing iron |
| CN102912160A (en) * | 2012-10-31 | 2013-02-06 | 北京神雾环境能源科技集团股份有限公司 | Method for treating lean ferrous manganese ore by directly reducing electric furnace melting components through rotary hearth furnace |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1358870A (en) * | 2001-10-10 | 2002-07-17 | 林原生 | Carbon containing cold consolidated globular ore capable of keeping strength from normal temp. to high temp. |
| CN102382977A (en) * | 2011-09-30 | 2012-03-21 | 中南大学 | Production technology of preparing manganeisen from low grade manganese mine |
| CN102643942A (en) * | 2012-04-16 | 2012-08-22 | 沈阳博联特熔融还原科技有限公司 | Reduction kiln equipment and method for directly reducing iron |
| CN102634622A (en) * | 2012-04-18 | 2012-08-15 | 沈阳博联特熔融还原科技有限公司 | Method for reducing and separating metallic irons by using refractory ores, complex ores and iron-containing wastes |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367647A (en) * | 2016-09-05 | 2017-02-01 | 中南大学 | Method for preparing high-carbon ferromanganese through gas-based reduction of ferromanganese oxide |
| CN106430196A (en) * | 2016-09-05 | 2017-02-22 | 中南大学 | Method for preparing manganese carbide by gas-based reduction of manganese oxides |
| CN106367647B (en) * | 2016-09-05 | 2018-06-01 | 中南大学 | A kind of method that gas-based reduction manganese iron axinite prepares high carbon ferromanganese |
| CN106756346A (en) * | 2016-11-28 | 2017-05-31 | 江苏大学 | A kind of method that high carbon ferromanganese prepares low-carbon ferromanganese |
| CN106756346B (en) * | 2016-11-28 | 2018-12-14 | 江苏大学 | A method of low-carbon ferromanganese is prepared with high carbon ferromanganese |
| CN114959320A (en) * | 2021-12-27 | 2022-08-30 | 吉铁铁合金有限责任公司 | Production method of low-nitrogen low-boron low-phosphorus low-carbon ferromanganese |
| CN114959320B (en) * | 2021-12-27 | 2023-04-14 | 吉铁铁合金有限责任公司 | Production method of low-nitrogen low-boron low-phosphorus low-carbon ferromanganese |
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Application publication date: 20131218 |