CN1793396A - Producing medium carbon magnganese iron by duplexing rocking furnace method - Google Patents
Producing medium carbon magnganese iron by duplexing rocking furnace method Download PDFInfo
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- CN1793396A CN1793396A CN 200510048745 CN200510048745A CN1793396A CN 1793396 A CN1793396 A CN 1793396A CN 200510048745 CN200510048745 CN 200510048745 CN 200510048745 A CN200510048745 A CN 200510048745A CN 1793396 A CN1793396 A CN 1793396A
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- manganese
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Abstract
The invention relates to a duplex rocking furnace method used to produce carbon ferromanganese. It includes the following steps: leading manganese slag thermal fluid to start rocking furnace; adding 1/2 liquid state manganese-silicon by weight; swing; leading the formed start rocking slag into final rocking furnace; adding the rest 1/2 liquid stage manganese-silicon; rocking; the fining procedure is as follows: adding rich manganese ore with not less than 40% manganese content; charging quantity is the 3/4 of the proportioning by weight; adding liquid state middle alloy into fining furnace; adding the rest 1/4 rich manganese ore; their ratio by weight is 1.1-0.85:1. The invention adopts four furnaces linkage to increase manganese recovery rate. Compared with fining carbon ferromanganese by single rocking furnace method, it can reduce 2-4 percent of final slag manganese containing, and reach under 7% to further increase manganese recovery rate.
Description
Technical field
The present invention relates to manganese is the production of iron alloy product, and particularly a kind of duplex grate method is produced the method for mid-carbon fe-mn.
Background technology
Mid-carbon fe-mn carbon content＞0.7%≤2.0% is widely used in special steel production.
There are three classes to produce the method for mid-carbon fe-mn at present: electro-silicothermic process, grate method, blow oxygen.And each big class derives several different methods according to its different characteristics, is divided into hot and cold dress method, low alkalinity method as electro-silicothermic process; The grate method is divided into the outer preliminary refining method of grate stove, grate purifying method; Blow oxygen is divided into oxygen decarburization method and oxygen blast desiliconization method.In a word, the whole bag of tricks all has its advantage and deficiency, has plenty of the emphatically utilization of heat energy, has plenty of the rate of recovery that improves manganese emphatically, also have both have both at the same time.
Produce mid-carbon fe-mn with electro-silicothermic process and grate method, the product carbon containing mainly comes from manganese-silicon and the electric furnace from the corrode of training electrode; What the electro-silicothermic process initial stage adopted is cold charge technology, exactly with in the refining furnaces of packing into such as manganese-silicon ingot and manganese ore, lime.Sixties end in 20th century, liquid manganese-silicon is poured into the heat of refining furnace and converted the technical study success, compare with cold charge technology, mid-carbon fe-mn power consumption decline 400～800kwh/t per ton, demonstrate bigger competitive edge, very fast being converted by heat replaced cold charge technology, become the main flow that mid-carbon fe-mn is produced, the mid-carbon fe-mn of producing with hot-metal process accounts for more than 80% at present, but slag contains manganese and cold charge technology quite about 20%, generally heat is converted slag that technology produces as the raw material of producing manganese-silicon at present.
It is a kind of energy-saving smelting new technology that just grows up after the seventies in 20th century that the grate method is smelted mid-carbon fe-mn, sees Fig. 1.This method is by the refining furnace operation of slagging tap; The manganese silicon stove operation of tapping a blast furnace; Grate preliminary refining operation; Finishing slag shrend operation; The refining furnace refining procedure; Mid-carbon fe-mn hydrothermal solution casting operation and finishing procedure are formed.Contain manganese in order to reduce slag effectively, this method is converted on the basis of technology in heat, adopt the outer preliminary refining of stove, at first with the molten medium-carbon manganese slag of refining furnace by-product to going into grate, be blended into grate after the more liquid manganese-silicon of manganese silicon stove being measured by analysis, rock grate with the rotating speed of certain speed, under good dynamic conditions, utilize the MnO in the manganese slag in the Si reduction in the manganese-silicon, reaction formula is:
。What the chemical heat that reaction discharges guaranteed to smelt normally carries out, and treats the MnO dilution turndown behind the specified requirement in the slag liquid, pours out waste residue, and liquid master alloy is to going into refining furnace until producing qualified mid-carbon fe-mn.Compare with electro-silicothermic process, grate method technology advanced person improves 14～17 percentage points manganese recovery ratio, and power consumption is converted on the technology basis in heat and reduced by 150～250kw.h/t, produces reliable and stable.
But, from actual production, find, because the variation of the variation of middle manganese slag ingredient or manganese-silicon composition is excessive, cause the manganiferous instability of finishing slag after the grate preliminary refining.
Summary of the invention
Deficiency at above-mentioned prior art existence, the invention provides a kind of duplex grate method and produce mid-carbon fe-mn, it adopts the duplex grate, adds original refining furnace and the supporting use of manganese silicon stove, the interlock of four stoves, solved preferably because the fluctuation of manganese slag ingredient causes that finishing slag contains the manganese problem of unstable in the grate to going into, can effectively improve the metal recovery rate of manganese, compare, can reduce finishing slag and contain manganese 2～4 percentage points with single grate method refining mid-carbon fe-mn, reach below 7%, further improved the rate of recovery of manganese.
The present invention will have single grate as first grate, increase a whole grate between grate and the manganese silicon stove just, and melting, casting, the finishing of refining furnace and manganese silicon stove, the finishing slag shrend operation of slagging tap, tap a blast furnace, putting in storage operation and whole grate are identical with ordinary method.
Method provided by the invention is by the refining furnace operation of slagging tap; The manganese silicon stove operation of tapping a blast furnace; First grate preliminary refining operation; Whole grate preliminary refining operation; Finishing slag shrend operation; The refining furnace refining procedure; Mid-carbon fe-mn hydrothermal solution casting operation and finishing procedure are formed, it is characterized in that: the middle manganese slag hydrothermal solution that first grate preliminary refining operation produces refining furnace is introduced grate just, by weight with 1/2 liquid manganese-silicon to going into grate just, grate placed on the grate machine shake, the formation ocean wave type seethes, and the effect of seething is to make liquid manganese-silicon overcome difference of specific gravity, fully contact with middle manganese slag liquid, utilize Si displacement in the manganese silicon slag tap in the Mn of MnO, reach and reduce the manganiferous purpose of slag, reaction formula is:
。
Whole grate preliminary refining operation will be introduced whole grate from the first slag that shakes that first grate skims, and again to going into remaining 1/2 liquid manganese-silicon, repeat the operation of grate preliminary refining just, further reduce finishing slag and contain manganese.Finishing slag after grate preliminary refining contains manganese and is lower than 7%, is the ideal cement raw material, and the liquid master alloy that first grate and whole grate are produced is to going into refining furnace respectively.
The refining furnace refining procedure is at first to add to contain manganese and be not less than 40% rich manganese ore in refining furnace, by weight, feeding quantity is 3/4 of a dosage, after the fusing, the liquid master alloy that first grate and whole grate are produced adds remaining 1/4 rich manganese ore again to going into refining furnace again; Between rich manganese ore and the liquid manganese-silicon by weight ratio be 1: 0.85～1.1.
Description of drawings
Fig. 1 is the process flow sheet that existing single grate method is produced mid-carbon fe-mn.
Fig. 2 is the process flow sheet that the duplex grate method that proposes of the present invention is produced mid-carbon fe-mn.
Embodiment
The used basic equipment of embodiment is:
1 of 12500KVA ore-smelting furnace, 1 of 3200KVA electric refining furnaces; 14m
32 of grates, useful volume: 2.5～10m
32 in grate machine, rotating speed: 35～80r/min, eccentricity: 30～180mm; The one-stop operation time: 8～15min; 8m
3Cinder ladle and hot metal ladle: 8; 50 tons of drivings: 2.
Embodiment 1
Add manganese ore, coke, silica in the manganese silicon stove.The manganese ore composition is: Mn30, SiO
223.33, Fe3.03, CaO10.46, Al
2O
31.2, MgO2.89; The fixed carbon 80% of coke; The SiO of silica
2Greater than 98%, above-mentioned material carries out melting and obtains liquid manganese-silicon, and composition is (weight ratio): Mn67, Si20, Fe11, C1.2, P0.2.
Add 3286 kilograms of rich manganese ores in the refining furnace, composition is (weight ratio): Mn42, Fe3.1, CaO4.1, SiO
27.2, add 25 kilograms in the required lime of control basicity 1.3 3700 kilograms (CaO is greater than 85), fluorite, dissolve the back and add the liquid master alloy that returns process preliminary refining by first grate and whole grate, carry out rising manganese to 1410 kilograms of rich manganese ores of refining furnace adding again and fall the silicon refining, carrying out refining sampling analysis composition by existing method comes out of the stove after qualified
The discharging simultaneously of refining furnace and manganese silicon stove, the molten iron of refining furnace output obtains the mid-carbon fe-mn product through casting, finishing, and weight is 5000 kilograms, and composition is by weight percentage: Mn78, Si1.5, C1.25, P0.25.The middle manganese slag of refining furnace output all flows into grate just as the raw material of next working cycle, and composition is: Mn21, CaO36.7, SiO
232.4, MgO3.4.
Rich manganese ore and other raw material material that refining furnace reloads equivalent amount begin the next cycle operation.
The liquid manganese-silicon of manganese silicon stove output flows into hot metal ladle, by the ratio of rich manganese ore and liquid manganese-silicon determine manganese-silicon dosage, weigh, at first the hydrothermal solution with dosage 1/2 is blended into grate just for 2265 kilograms, shake grate 8min just with 80 millimeters of eccentricitys, 50r/min rotating speed, the eccentric force of utilizing grate machine eccentric wheel to produce makes melt form ocean wave type in grate and seethes, the difference in specific gravity of manganese slag and manganese-silicon in overcoming, Si in the reinforcement manganese-silicon and the reaction of the MnO in the middle manganese slag.Treat that the running time reaches the back and shut down, left standstill 3 minutes.
The lifting grate casts aside whole grate with upper strata scum silica frost in the stove (just shake slag and contain manganese 12%), and the master alloy hydrothermal solution that first grate comes out is gone into refining furnace by chute.
Be blended into 2265 kilograms of remaining liquid manganese-silicon melts again in whole grate, shake whole grate 8min with the 50r/min rotating speed, institute's effect of getting is with just grate is identical, treats that the running time reaches the back shutdown, leaves standstill 3 minutes again.
The lifting grate, the upper strata scum silica frost is cast aside into the cinder ladle Water Quenching in the stove, and finishing slag contains manganese 6.83%, 6260 kilograms of weight.
The secondary master alloy hydrothermal solution that whole grate comes out is gone into refining furnace by chute.
Example 2～4
According to the identical technological process of embodiment 1, rich manganese ore/liquid manganese-silicon is that 1: 1.1, manganese-silicon composition are: Mn67, Si20, Fe11, C1.2, liquid manganese-silicon add just grate and whole grate respectively with 1/2 of total amount; Just grate and whole grate are all with 60 rev/mins, 40 millimeters of eccentricitys, running 12 minutes; Be respectively when rich manganese ore contains manganese: 40.2,42.5 and 45.1 the time, middle manganese slag hydrothermal solution contains manganese and is respectively 20.2,21.4 and 22.8, just shakes slag and contains manganese, shakes that slag contains manganese and the mid-carbon fe-mn product contains manganese eventually, sees Table 1.
Slag in the table 1 under the different manganese content conditions of manganese slag contains manganese and product contains manganese (W%)
| Middle manganese slag contains manganese | 20.2 | 21.4 | 22.8 |
| Just shake slag and contain manganese | 12.7 | 13.2 | 13.8 |
| Shake slag eventually and contain manganese | 6.5 | 6.55 | 6.64 |
| Product contains manganese | 79.2 | 80.1 | 80.3 |
Find out that from last table middle manganese slag contains manganese to be changed, just shake slag and contain manganese and change more obviously that shake slag eventually and contain manganese and change lessly, owing to adding the further purified effect of rich manganese ore at refining furnace, it is not obvious that middle manganese slag contains the higher influence to product of manganese.
Example 5～10
According to the identical technological process of embodiment 1, first grate and whole grate are all with 40 rev/mins, 100 millimeters of eccentricitys, running 15 minutes; The manganese-silicon composition is: Mn67, Si20, Fe11, C1.2; Rich manganese ore composition is: Mn42, Fe3.1, CaO4.1, SiO
27.2; Liquid manganese-silicon adds just grate and whole grate respectively with 1/2 of total amount, when rich manganese ore/when liquid manganese-silicon is 1: 0.7～1.2, just shakes slag and contains manganese, shakes that slag contains manganese and the mid-carbon fe-mn product contains manganese eventually, sees Table 2.
Slag under the rich manganese ore of table 2/liquid manganese-silicon different ratios contains manganese and product contains manganese (W%)
| Rich manganese ore/liquid manganese-silicon | 1∶0.7 | 1∶0.8 | 1∶0.9 | 1∶1.0 | 1∶1.1 | 1∶1.2 |
| Rich manganese ore (kilogram) | 4700 | 4700 | 4700 | 4700 | 4700 | 4700 |
| Liquid manganese-silicon (kilogram) | 3290 | 3760 | 4230 | 4700 | 5170 | 5640 |
| Just shake slag and contain manganese | 17.2 | 16.5 | 14.8 | 13.5 | 12.6 | 11.4 |
| Shake slag eventually and contain manganese | 10.34 | 8.95 | 6.81 | 6.63 | 6.43 | 6.14 |
| Product contains manganese | 82.8 | 81.4 | 80.7 | 79.2 | 78.6 | 77.5 |
When rich manganese ore/liquid manganese-silicon was 1: 0.7 and 1: 0.8, the Si amount obviously was not enough to reduce MnO in the liquid manganese-silicon, even if adopt the duplex grate, shaking slag eventually, to contain manganese still higher; When rich manganese ore/when liquid manganese-silicon is 1: 1.2, contain the low product of manganese to contain manganese on the low side and siliceous higher though shake slag eventually.
Example 11～14
According to the identical technological process of embodiment 1, rich manganese ore/liquid manganese-silicon is 1: 1.0; The manganese-silicon composition is: Mn67, Si20, Fe11, C1.2; Rich manganese ore composition is: Mn42, Fe3.1, CaO4.1, SiO
27.2; Liquid manganese-silicon adds just grate and whole grate respectively with 1/2 of total amount; Whole grate is with 50 rev/mins, 80 millimeters of eccentricitys, running 10 minutes; Just grate is with 60 rev/mins, 80 millimeters of eccentricitys, runtime when being respectively 5～15 minutes, just shakes slag and contains manganese, shakes slag eventually and contain manganese, sees Table 3.
Table 3 just grate under different runtime slag contain manganese (W%)
| Runtime (branch) | 5 | 8 | 11 | 15 |
| Just shake slag and contain manganese | 16.3 | 13.2 | 12.8 | 12.4 |
| Shake slag eventually and contain manganese | 8.32 | 6.65 | 6.43 | 6.32 |
Reaction not exclusively contained the higher first slag that shakes of manganese and transfers to whole grate when grate was 5 minutes runtime originally, and that the liquid manganese-silicon quantity not sufficient in the whole grate makes finishing slag contain manganese is higher; Grate was more than 8 minutes the time runtime originally, all can control finishing slag well and contain manganese.
Claims (4)
1. a duplex grate method is produced the method for mid-carbon fe-mn, form by refining furnace tap a blast furnace operation, first grate preliminary refining operation, whole grate preliminary refining operation, finishing slag shrend operation, refining furnace refining procedure, mid-carbon fe-mn hydrothermal solution casting operation and the finishing procedure of operation, manganese silicon stove of slagging tap, it is characterized in that:
Just grate preliminary refining operation is that the middle manganese slag hydrothermal solution that refining furnace produces is introduced grate just, by weight with 1/2 liquid manganese-silicon to going into grate just, grate is placed on the grate machine shakes;
Whole grate preliminary refining operation is that the first slag that shakes that skims from first grate is introduced whole grate, again to going into remaining 1/2 liquid manganese-silicon, repeats the operation of grate preliminary refining just;
The refining furnace refining procedure is at first to add to contain manganese and be not less than 40% rich manganese ore in refining furnace, by weight, feeding quantity is 3/4 of a dosage, after the fusing, the liquid master alloy that first grate and whole grate are produced adds remaining 1/4 rich manganese ore again to going into refining furnace again;
Ratio between described rich manganese ore and the liquid manganese-silicon is 1: 0.85～1.1 by weight.
2. produce mid-carbon fe-mn according to the described duplex grate of claim 1 method, it is characterized in that the interlock of four stoves, manganese silicon stove is for working continuously, and continuous charging is regularly slagged tap and tapped a blast furnace; Refining furnace and two grates are discontinuous running, and refining furnace is interrelated adjacent working cycle, and the manganese slag is the raw material of next cycle in the by product of last one-period.
3. produce mid-carbon fe-mn according to the described duplex grate of claim 1 method, it is characterized in that: the middle manganese slag of refining furnace output all flows into grate just; The liquid manganese-silicon of manganese silicon stove output by the ratio of rich manganese ore and liquid manganese-silicon determine manganese-silicon dosage, weigh, at first with the hydrothermal solution of dosage 1/2 to going into grate just, shake just with the rotating speed of eccentricity 40～100mm, 40～60r/min and to shut down behind grate 8～15min, leave standstill after 3 minutes grate is lifted by crane, upper strata scum silica frost in the stove is cast aside into whole grate, poured a master alloy hydrothermal solution into refining furnace; Again in whole grate to going into remaining manganese-silicon melt; shut down after shaking whole grate 8～15min with the rotating speed of eccentricity 40～100mm, 40～60r/min; leave standstill after 3 minutes grate is lifted by crane; the upper strata scum silica frost is cast aside into the cinder ladle Water Quenching as finishing slag in the stove, pours secondary master alloy hydrothermal solution into refining furnace.
4. produce mid-carbon fe-mns according to claim 1 or 3 described duplex grate methods, it is characterized in that refining furnace is finished the one-period operation after, the rich manganese ore material of total dosage 3/4 of packing into, inject whole master alloys after, more remaining rich manganese ore is gone into stove.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824577A (en) * | 2010-05-31 | 2010-09-08 | 贵州大学 | Production technique of medium-carbon ferromanganese and manganese-enriched slag |
| CN102296229A (en) * | 2011-05-28 | 2011-12-28 | 内蒙古包钢钢联股份有限公司 | Hot-rolled dual-phase steel sheet with tensile strength of 700MPa and low yield ratio and preparation method |
| CN105624438A (en) * | 2016-02-02 | 2016-06-01 | 镇远县鸿丰新材料有限公司 | Method for refining low-carbon ferromanganese alloy through poor-manganese slag |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011294A (en) * | 1983-06-29 | 1985-01-21 | Fujitsu Ltd | Method for growing single crystal |
| SU1733882A1 (en) * | 1990-02-13 | 1992-05-15 | Ленинградский Научно-Исследовательский И Конструкторский Институт Химического Машиностроения | Loose material thermal treatment oscillating furnace |
-
2005
- 2005-12-26 CN CNB2005100487456A patent/CN100374600C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824577A (en) * | 2010-05-31 | 2010-09-08 | 贵州大学 | Production technique of medium-carbon ferromanganese and manganese-enriched slag |
| CN102296229A (en) * | 2011-05-28 | 2011-12-28 | 内蒙古包钢钢联股份有限公司 | Hot-rolled dual-phase steel sheet with tensile strength of 700MPa and low yield ratio and preparation method |
| CN105624438A (en) * | 2016-02-02 | 2016-06-01 | 镇远县鸿丰新材料有限公司 | Method for refining low-carbon ferromanganese alloy through poor-manganese slag |
| CN105624438B (en) * | 2016-02-02 | 2018-06-19 | 镇远县鸿丰新材料有限公司 | A kind of method using poor manganese slag refining ferromanganese alloy |
| CN106435310A (en) * | 2016-10-14 | 2017-02-22 | 贵州镇远鸿丰新材料有限公司 | Technology for using rocking furnace silicon-thermal method for refining manganese silicon aluminum alloy |
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