CN1162553C - Silico-manganese alloy producing process in MF furnace - Google Patents
Silico-manganese alloy producing process in MF furnace Download PDFInfo
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- CN1162553C CN1162553C CNB011337699A CN01133769A CN1162553C CN 1162553 C CN1162553 C CN 1162553C CN B011337699 A CNB011337699 A CN B011337699A CN 01133769 A CN01133769 A CN 01133769A CN 1162553 C CN1162553 C CN 1162553C
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- silicomanganese
- silicon
- slag iron
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- washery slag
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Abstract
The present invention discloses a method for producing high silicon silicomanganese, and in the method, silicon increase and decarbonization are carried out after low grade cheap silicomanganese alloy washery refuse iron is remelted in an intermediate frequency furnace and manganese increase outside the furnace is carried out. The present invention comprises the following steps: the silicomanganese washery refuse iron is smelted, and silicomanganese molten liquid is formed; metal silicon residue iron as a silicon increasing agent and NaCl-CaO as a decarbonizer are added to the silicomanganese molten liquid to respectively carry out the silicon increase and the decarbonization; an MnO-CaCl2-CaO mixture as a manganese increasing agent continues to be added, and manganese increase outside the furnace is carried out to the silicomanganese molten liquid. The method has the advantages of low cost of raw materials, low energy consumption, simple production technology, little equipment investment and obvious economic benefit.
Description
Skill this area:
The present invention relates to a kind of method of producing silicomanganese in intermediate frequency furnace, especially a kind of inexpensive silicomanganese washery slag iron of low-quality that utilizes increases silicon, decarburization after the remelting in intermediate frequency furnace, and increase a kind of method of producing high silicon silicomanganese of manganese outside stove.
Background technology:
China's silicon-manganese alloy all is to adopt rich manganese slag of high-quality and import manganese ore at SiO in the hot stove in ore deposit at present
2Form with smelting under the excessive condition of coke.The facility investment of this technology is big, power consumption is high, manganese resource is difficult to tissue and cost an arm and a leg, so product cost is higher.Silicomanganese washery slag iron generally is to be got by the jig washing after silicomanganese slag fragmentations such as FeMn65Si17 and Fe6OSi14, its composition instability, contain 10～20% slag, and silicon and manganese content is lower, carbon content is higher, there is not direct utility value, so price is comparatively cheap, is not fully used.
Summary of the invention:
The invention provides a kind of inexpensive silicomanganese washery slag iron of low-quality that utilizes and in the frequency stove, increase silicon, decarburization after the remelting, and outside stove, increase a kind of method of producing high silicon silicomanganese of manganese.The raw material one-tenth wood that this method adopts is cheap, energy consumption is low, and production technique is simple, facility investment is few, remarkable in economical benefits.
Technical scheme of the present invention is:
A kind of method of utilizing silicomanganese washery slag iron to produce high silicon silicomanganese in intermediate frequency furnace is characterized in that: comprise the steps:
A, melting silicomanganese washery slag iron form the silicomanganese liquation;
B, in silicomanganese solution, add and increase silicea metal white residue iron and decarburizer NaCl-CaO, respectively the silicomanganese liquation is increased silicon, decarburization;
C, continuation add manganese increasing agent MnO-CaCI
2-CaO mixture carries out stove to the silicomanganese liquation and increases manganese outward.
The mode of melting silicomanganese washery slag iron of the present invention is that to utilize Graphite Electrodes that a small amount of silicomanganese washery slag iron is drawn in intermediate frequency furnace molten, and then adds silicomanganese washery slag iron in batches and carry out melting.
The present invention increases the amount that increases silicea that silicon adds for adding 10～20% of silicomanganese washery slag iron gross weight, the alloy silicon content is exceeded draft 2～4% of the siliceous weight of finished product alloy.
The amount of the decarburizer of the decarburizer that decarburization of the present invention added is for adding 3～5% of silicomanganese washery slag iron gross weight.
After the present invention increases the silicon decarburization, molten clear metal white residue and the slag system that forms by NaCI-CaO, concise 3～5 minutes of constant temperature, temperature is controlled at 1400～1450 ℃ for benefit, removes the top layer scum silica frost then, furnace temperature is risen to 1480～1500 ℃ again and comes out of the stove.
It is that manganese increasing agent MnO-CaCI is equipped with in 1480～1500 ℃ silicomanganese melt impouring that stove of the present invention increases manganese outward
2In the shaking ladle of-CaO mixture, and rotated 3～5 minutes, the amount of the manganese increasing agent that is added is for adding 10～15% of silicomanganese washery slag iron gross weight.
Manganese increasing agent MnO-CaCI of the present invention
2-CaO mixture, manganese oxide are used for generating manganese and silicon-dioxide with pasc reaction, and calcium oxide is used for slag making, and calcium chloride is used for dilution.
After increasing manganese outward, alloy liquation stove of the present invention makes finished product, the cast molding of removing slag at last.
Silicomanganese washery slag iron of the present invention can be used for slag cement factory making cement raw material through broken, jig washed metal at the slag that intermediate frequency furnace fusing back is produced.
The present invention increases the slag that produces in the silicon decarbonization process and can be used for smelting silicomanganese.
Manganese during the slag that the present invention produces in increasing the manganese operation can be used for smelting.
Metal white residue iron of the present invention is that metallic silicon smelting remains in the waste product Pure Silicon Metal that contains certain slag or impurity component that slag runner, tundish splash go out when tapping a blast furnace, and general silicon content can reach more than 80%.
The present invention increases the purpose that silicon increases the amount realization production ordinary silicon manganese alloy of manganese by adjustment.
The silicomanganese washery slag ferrous components that the present invention adopts is analyzed:
Mn:50～60%; Si:12～16%; C:1.8～3.0%; P:0.13～0.23%; Slag inclusion ratio 10～20%.
The high silicon silicomanganese of final product of the present invention content analysis:
Mn:60～76%; Si:22～28%; C:0.4～0.8%; P:0.18～0.3%; The S surplus.
Be example to produce one ton of high silicon silicomanganese of FeMn60Si25 below,, set forth beneficial effect of the present invention place adopting the present invention and adopting in the hot stove in ore deposit and do a contrast with rich manganese slag of high-quality and import manganese ore:
(seeing the following form)
| The hot stove production in ore deposit | Intermediate frequency furnace is produced | ||||||
| Title | Unit price (unit) | Consumption | Unit consumption unit/ton | Title | Unit price (unit) | Consumption | Unit consumption unit/ton |
| Rich manganese slag Mn 〉=40% | 1000 | 1 | 1000 | Washery slag iron Mn 〉=40% Si 〉=12% | 1800 | 1 | 1800 |
| Import manganese ore Mn 〉=46 | 1100 | 1 | 1100 | Decarburizer | 20 | ||
| Silica | 100 | Increase silicea | 600 | ||||
| Coke | 500 | 0.65 | 325 | Power consumption | 0.25 | 1000 | 250 |
| Electrode paste | 1200 | 0.07 | 84 | Furnace lining material | 30 | ||
| Power consumption | 5800 | 0.25 | 1450 | The five metals material | 30 | ||
| The electrode shell five metals | 50 | Manganese increasing agent | 240 | ||||
| Manually | 150 | Manually | 110 | ||||
| Depreciation | 100 | Depreciation | 20 | ||||
| Add up to | 4369 | 3100 | |||||
By the contrast of last table as seen, adopt the present invention to produce one ton of high silicon silicomanganese of FeMn60Si25 and can reduce cost surplus in the of 1000 yuan than the hot stove in employing ore deposit, economic benefit is considerable.
Accompanying drawing and drawing explanation:
Fig. 1 is a process flow diagram of the present invention
Embodiment:
Processing condition: 500kg of intermediate frequency furnace
Drive a vehicle one 5 tons
One 3 tons of shaking ladles
Two 1 ton of tundish
At first will wash silicon manganese slag iron analysis metering, and in intermediate frequency furnace, utilize Graphite Electrodes to add a small amount of silicomanganese washery slag iron and draw molten.After forming solution in the stove, take out Graphite Electrodes, silicomanganese washery slag iron is added in the stove in batches.All charges all add and molten clear after, remove the scum silica frost on top layer, last in the last stove for containing the silicomanganese solution of Mn50～60%, Si12～16%, C1.8～3.0%.
Because the silicon of silicon-manganese alloy is higher, carbon is lower, and (general Si 〉=22%, C≤0.7%) is so need increase the silicon decarburization this moment.In stove, add the metal white residue iron that silicomanganese is washed fried iron total amount 15%, make the interior alloy silicon content of stove exceed finished product alloy silicon content 3%.Because the silicon in the metal white residue constantly rises, according to silicon one carbon balance principle, excessive carbon will be sucked out come-up, the general fusing point of slag in the metal white residue is higher, carry out slag making and form the carbon that the low melting point slag system absorbs come-up effectively so when adding the metal white residue, add the NaCI-CaO of silicomanganese washery slag iron total amount 4% in addition, thereby reach the purpose of decarburization.
When metal white residue and NaCI-CaO slag system all molten clear after, concise 4 minutes of constant temperature fully floats carbon and is absorbed by slag, removes the top layer scum silica frost then.At this moment, the detected temperature of furnace temperature is a benefit with 1400～1450 ℃, removes the top layer scum silica frost then, furnace temperature is risen to 1480～1500 ℃ again and comes out of the stove.
With the high silicon silicomanganese melt impouring tundish of furnace temperature about 1480～1500 ℃, hang grate by driving before, and the manganese increasing agent MnO-CaCI of silicomanganese washery slag iron total amount 12.5% is equipped with in impouring
2Rotated 4 minutes in the shaking ladle of-CaO mixture, carry out stove and increase manganese outward.Produce the high silicon silicomanganese finished product that contains manganese 76%, siliceous 27%, carbon containing 0.5%, the cast molding of removing slag at last, broken warehouse-in.
Claims (6)
1, a kind of method of utilizing silicomanganese washery slag iron to produce high silicon silicomanganese in intermediate frequency furnace is characterized in that: comprise the steps:
A, melting silicomanganese washery slag iron form the silicomanganese liquation;
B, in silicomanganese solution, add and increase silicea metal white residue iron and decarburizer NaCl-CaO, respectively the silicomanganese liquation is increased silicon, decarburization;
C, continuation add manganese increasing agent MnO-CaCl
2-CaO mixture carries out stove to the silicomanganese liquation and increases manganese outward.
2, the method for utilizing silicomanganese washery slag iron in intermediate frequency furnace, to produce high silicon silicomanganese according to claim 1, it is characterized in that: the mode of melting silicomanganese washery slag iron is that to utilize Graphite Electrodes that a small amount of silicomanganese washery slag iron is drawn in intermediate frequency furnace molten, and then adds silicomanganese washery slag iron in batches and carry out melting.
3, the method for utilizing silicomanganese washery slag iron in intermediate frequency furnace, to produce high silicon silicomanganese according to claim 1, it is characterized in that: increase the amount that increases silicea that silicon adds for adding 10～20% of silicomanganese washery slag iron gross weight, the siliceous weight of alloy is exceeded draft 2～4% of the siliceous weight of finished product alloy.
4, the method for utilizing silicomanganese washery slag iron to produce high silicon silicomanganese in intermediate frequency furnace according to claim 1 is characterized in that: the amount of the decarburizer that decarburization added is for adding 3～5% of silicomanganese washery slag iron gross weight.
5, according to claim 1, the 3 or 4 described methods of utilizing silicomanganese washery slag iron in intermediate frequency furnace, to produce high silicon silicomanganese, it is characterized in that: after increasing the silicon decarburization, molten clear metal white residue and the slag system that forms by NaCI-CaO, concise 3～5 minutes of constant temperature, temperature is controlled at 1400～1450 ℃ and is benefit, remove the top layer scum silica frost then, furnace temperature is risen to 1480～1500 ℃ again and come out of the stove.
6, the method for utilizing silicomanganese washery slag iron to produce high silicon silicomanganese in intermediate frequency furnace according to claim 1 is characterized in that: it is that manganese increasing agent MnO-CaCl is equipped with in 1480～1500 ℃ silicomanganese melt impouring that stove increases manganese outward
2In the shaking ladle of-CaO mixture, and rotated 3～5 minutes, the amount of the manganese increasing agent that is added is for adding 10～15% of silicomanganese washery slag iron gross weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011337699A CN1162553C (en) | 2001-12-28 | 2001-12-28 | Silico-manganese alloy producing process in MF furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011337699A CN1162553C (en) | 2001-12-28 | 2001-12-28 | Silico-manganese alloy producing process in MF furnace |
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| CN1375566A CN1375566A (en) | 2002-10-23 |
| CN1162553C true CN1162553C (en) | 2004-08-18 |
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| CNB011337699A Expired - Fee Related CN1162553C (en) | 2001-12-28 | 2001-12-28 | Silico-manganese alloy producing process in MF furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100415909C (en) * | 2006-08-17 | 2008-09-03 | 偏关县晋电化工有限责任公司 | Production method of silicomangan of sintering powder by rotary kiln and hot filling in ore-smelting electric furnace |
| CN103014470B (en) * | 2012-11-30 | 2015-02-04 | 广西新振锰业集团有限公司 | Method of using common rock ballast as slag-modifier agent for silicomanganese alloy smelting |
| CN103555973A (en) * | 2013-07-23 | 2014-02-05 | 内蒙古鄂尔多斯冶金有限责任公司 | Formula for recycling silicon-manganese alloy slag during silicon-manganese alloy production |
| CN110396604A (en) * | 2019-08-09 | 2019-11-01 | 宁夏亚启科技有限公司 | Utilize the method for variable frequency induction melting furnace remelting silicomangan powder |
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