CN103643056B - The smelting process of low carbon ferromanganese - Google Patents

The smelting process of low carbon ferromanganese Download PDF

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CN103643056B
CN103643056B CN201310613653.2A CN201310613653A CN103643056B CN 103643056 B CN103643056 B CN 103643056B CN 201310613653 A CN201310613653 A CN 201310613653A CN 103643056 B CN103643056 B CN 103643056B
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low carbon
parts
steel
carbon ferromanganese
iron
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CN103643056A (en
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蒋龙奎
戈文荪
何为
王敦旭
黄正华
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Xichang Steel and Vanadium Co Ltd
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Xichang Steel and Vanadium Co Ltd
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Abstract

The invention provides a kind of smelting process of low carbon ferromanganese.Described smelting process comprises the following steps: by weight, is added in mineral hot furnace by the fluorite of the steel-making dedusting ash of 30 ~ 40 parts, the manganese ore of 45 ~ 60 parts, the quartz sand of 1 ~ 3 part, the carbonaceous material of 10 ~ 15 parts and 0.5 ~ 1 part to carry out adding hot melt and divide; After load melting, to be incubated and the molten iron temperature controlled in stove in molten bath is 1550 ~ 1650 DEG C, obtain low carbon ferromanganese liquid divide slag with molten and be separated, the composition of the low carbon ferromanganese liquid obtained is the iron of Mn45 ~ 55%, C0.2 ~ 0.7%, Si1.0 ~ 2.0%, P≤0.1%, S≤0.05% and surplus by weight percentage.The present invention has carried out fully effectively utilizing to the manganese metal resource in metallic iron resource in steel-making dedusting ash and manganese ore, solve the environmental problem that iron and steel enterprise causes due to steel-making dedusting ash bulk deposition, for manganese resource carries out fully effectively utilizing opening new way, have that technique is simple, metallic iron, manganese yield are high, the low advantage of smelting cost.

Description

The smelting process of low carbon ferromanganese
Technical field
The present invention relates to alloy smelting field, more particularly, relate to a kind of to make steel the method that dedusting ash, manganese ore, carbonaceous material, quartz sand, fluorite be raw material smelting low carbon ferromanganese.
Background technology
Low carbon ferromanganese is mainly by the alloy that manganese, iron two kinds are elementary composition, and ferromanganese is a kind of reductor with the most use in STEELMAKING PRODUCTION and alloying material.Ferromanganese, as alloying element additive, can strengthen the hardness of steel, ductility, toughness and fastness to wear.It is widely used in the steel alloys such as structure iron, tool steel, stainless refractory steel, wear resisting steel.Manganese also has desulfurization and reduces the harmful effect effect of sulphur.
Publication number is that the Chinese patent of CN103088244A discloses a kind of manganeseirom and preparation method.Its composition of this manganeseirom includes the manganese of 50 ~ 70% by weight percentage, and the silicon of 3 ~ 5%, lower than the carbon of 1.0%, lower than the phosphorus of 0.1%, lower than the sulphur of 0.02%, be no more than other impurity of 2%, surplus is iron.Its preparation method comprises: select percentage composition by weight to calculate carbon containing lower than the scrap steel of 1.0%, add the calcium system dephosphorization agent accounting for steel weight 13 ~ 15%, wherein, in calcium system dephosphorization agent, silicon weight content is 30 ~ 35%; After above-mentioned raw materials all melts, add slag supplying agent slag making, add deslagging agent slagging-off after slag making again, keep furnace temperature at 1350 ± 30 DEG C, then add manganese successively and refine, then tapping casting becomes ingot.The phosphorus of the manganeseirom obtained in this application and carbon content, lower than the requirement of steel, solve the phosphorus in existing manganeseirom and the too high problem of carbon content.
Publication number is that the Chinese patent of CN102586669A discloses a kind of method of producing low carbon ferromanganese, raw material is done with electrolytic metal Mn sheet or electrolytic metal manganese powder, add the iron of 0.5 ~ 30%, adopt intermediate frequency furnace by electrolytic metal Mn sheet and iron melting, when ingot casting, cast in limit, while be sprinkled in mold by electrolytic metal Mn sheet or electrolytic metal manganese powder, the low carbon ferromanganese parcel electrolytic metal Mn sheet of melting or electrolytic metal manganese powder form an overall ingot casting, then ingot casting is broken into low carbon ferromanganese.Compared with the low carbon ferromanganese produced with scorification completely, its product foreign matter content is lower slightly, and product antioxidant property is identical, and product energy consumption per ton will reduce greatly.
Publication number is the production method that the Chinese patent of CN101775508A discloses a kind of low carbon ferromanganese, blast-furnace smelting Mn-rich slag, electric refining furnaces are produced low carbon ferromanganese, the outer shaking ladle dilution process three productions method organic linking linkage operation of refining slag hearth by this method, smelt pilot process (the outer shaking ladle of liquid Mn-rich slag → electric refining furnaces, liquid low-carbon (LC) silicomanganese → electric refining furnaces, refining slag → stove) whole hot charging heat to convert, produce the low carbon ferromanganese meeting national standard (GB/T3795-1996).Successfully solve the difficult problem that production main raw material resource is nervous, price is high, product comprehensive energy consumption is high, products production cost is high existed in existing low carbon ferromanganese production process.
Publication number is the production technique that the Chinese patent of CN101368244A discloses a kind of low carbon ferromanganese.This production technique comprises and adds after carboloy remover melted by electric arc furnace with useless manganese powder or manganese-silicon, add dephosphorization agent again, desulfuration agent feeding shaking ladle carries out preliminary desiliconization, thus obtain the manganese-silicon of low-carbon (LC), low-phosphorous, low-sulfur, high silicon, then be poured in refining furnace, in refining furnace, add qualified manganese ore and unslaked lime, namely obtain the low carbon ferromanganese of high-quality.This invention production cost is low, save energy resource, and decrease environmental pollution, waste residue can be used as cement mill raw material.
Although disclose the method for some smelting low carbon manganeseiroms in prior art, there is the shortcomings such as cost is high, complex process.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to solve in above-mentioned prior art the one or more problems existed.
An object of the present invention is to provide a kind of to make steel dedusting ash, manganese ore, quartz sand, carbonaceous material and the fluorite method for raw material smelting low carbon ferromanganese.
To achieve these goals, the invention provides a kind of smelting process of low carbon ferromanganese.Described smelting process comprises the following steps: by weight, is added in mineral hot furnace by the fluorite of the steel-making dedusting ash of 30 ~ 40 parts, the manganese ore of 45 ~ 60 parts, the quartz sand of 1 ~ 3 part, the carbonaceous material of 10 ~ 15 parts and 0.5 ~ 1 part to carry out adding hot melt and divide; After load melting, to be incubated and the molten iron temperature controlled in stove in molten bath is 1550 ~ 1650 DEG C, to obtain low carbon ferromanganese liquid and a molten point slag; Be separated with a molten point slag by described low carbon ferromanganese liquid, the composition of the low carbon ferromanganese liquid obtained is the iron of Mn 45 ~ 55%, C 0.2 ~ 0.7%, Si1.0 ~ 2.0%, P≤0.1%, S≤0.05% and surplus by weight percentage.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, described smelting process by by weight 32 ~ 38 parts steel-making dedusting ash, the manganese ore of 50 ~ 58 parts, the quartz sand of 1.5 ~ 2.5 parts, the carbonaceous material of 12 ~ 14 parts and 0.6 ~ 0.8 part fluorite add in mineral hot furnace and carry out adding hot melt and divide.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, by weight percentage, SiO is contained in described steel-making dedusting ash 25 ~ 8%, CaO 15 ~ 25%, TFe 50 ~ 70%, P≤0.1%, S≤0.05% and MnO 1 ~ 2%.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, by weight percentage, MnO 40 ~ 60%, Fe is contained in described manganese ore 2o 35 ~ 10%, CaO 10 ~ 20%, SiO 210 ~ 20%, Al 2o 33 ~ 8%, MgO≤5%, P≤0.1% and S≤0.05%.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, by weight percentage, SiO is contained in described quartz sand 2>=90%, P≤0.01% and S≤0.01%.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, described carbonaceous material is carbon dust, and it is by weight percentage containing C gu>=90%, P≤0.1% and S≤0.05%.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, by weight percentage, CaF is contained in described fluorite 2>=85%, SiO 25 ~ 10%, P≤0.1% and S≤0.05%.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, the granularity≤5mm of described steel-making dedusting ash, the granularity≤20mm of described manganese ore, the granularity≤3mm of described quartz sand, the granularity≤3mm of described carbonaceous material, the granularity≤10mm of described fluorite.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, the time of described insulation is 1 ~ 1.5 hour.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, the total amount that adds of described steel-making dedusting ash, manganese ore, quartz sand, carbonaceous material and fluorite is 10 ~ 15t.
According to an embodiment of the smelting process of low carbon ferromanganese of the present invention, described smelting process also comprises described low Carbon Manganese iron liquid casting, cooling and break process is obtained ferromanganese alloy.
Compared with prior art, beneficial effect of the present invention comprises: utilization steel-making dedusting ash, manganese ore are raw material, smelting cost is low, carry out fully effectively utilizing to the manganese metal resource in metallic iron resource in steel-making dedusting ash and manganese ore, solve the environmental problem that iron and steel enterprise causes due to steel-making dedusting ash bulk deposition, for manganese resource carries out fully effectively utilizing opening new way.Have that technique is simple, metallic iron, manganese yield advantages of higher.
Embodiment
Hereinafter, the smelting process according to low carbon ferromanganese of the present invention will be described in detail in conjunction with exemplary embodiment.
Contriver finds, at present steel-making dedusting ash bulk deposition, is not utilized effectively and the environmental problem caused, and makes steel the metallic iron containing high level in dedusting ash, and for this reason, contriver proposes a kind of method adopting steel-making dedusting ash smelting low carbon ferromanganese.
The smelting process of low carbon ferromanganese according to an exemplary embodiment of the present invention, by adopting steel-making dedusting ash, manganese ore, quartz sand, carbonaceous material (such as, carbon dust, coal dust) and fluorite be that raw material carries out adding hot melt and divides (molten point refers to the abbreviation that fusing is separated) in mineral hot furnace.Specifically comprise the following steps:
By weight, added in mineral hot furnace by the fluorite of the steel-making dedusting ash of 30 ~ 40 parts, the manganese ore of 45 ~ 60 parts, the quartz sand of 1 ~ 3 part, the carbonaceous material of 10 ~ 15 parts and 0.5 ~ 1 part and carry out adding hot melt and divide, wherein, the heating total amount of each raw material is 10 ~ 15t; After load melting, be incubated 1 ~ 1.5 hour and the molten iron temperature controlled in stove in molten bath is 1550 ~ 1650 DEG C, obtain low carbon ferromanganese liquid and a molten point slag; Then, described low carbon ferromanganese liquid is separated with a molten point slag, wherein, a molten point slag is put into slag ladle, low carbon ferromanganese liquid is gone out in iron ladle, then is cast into fritter, after cooling, fragmentation, obtain ferromanganese alloy.The composition of this ferromanganese alloy is the iron of Mn 45 ~ 55%, C 0.2 ~ 0.7%, Si 1.0 ~ 2.0%, P≤0.1%, S≤0.05% and surplus by weight percentage.
Wherein, SiO is contained in steel-making dedusting ash 25 ~ 8%, CaO 15 ~ 25%, TFe 50 ~ 70%, P≤0.1%, S≤0.05% and MnO 1 ~ 2%, granularity≤5mm.Containing MnO 40 ~ 60%, Fe in manganese ore 2o 35 ~ 10%, CaO 10 ~ 20%, SiO 210 ~ 20%, Al 2o 33 ~ 8%, MgO≤5%, P≤0.1% and S≤0.05%, granularity≤20mm.Containing SiO in quartz sand 2>=90%, P≤0.01% and S≤0.01%, granularity≤3mm.Carbonaceous material is carbon dust, containing fixed carbon >=90%, P≤0.1% and S≤0.05% in carbon dust, and granularity≤3mm.Containing CaF in fluorite 2>=85%, SiO 25 ~ 10%, P≤0.1% and S≤0.05%, granularity≤10mm.
Preferably, each proportioning raw materials is the fluorite of the steel-making dedusting ash of 32 ~ 38 parts, the manganese ore of 50 ~ 58 parts, the quartz sand of 1.5 ~ 2.5 parts, the carbonaceous material of 12 ~ 14 parts and 0.6 ~ 0.8 part by weight.
Relating to principal reaction principle in the present invention is: 1. each raw material is melted into liquid state after being heated in mineral hot furnace; 2. the ferriferous oxide in the carbon of melting and iron liquid reacts, and is reduced to liquid metal iron; 3. the carbon of melting and MnO react, and are reduced to generate liquid manganese and enter into iron liquid.
The reason that each proportioning raw materials is arranged is: be first the setting of bessemer furnace slag and manganese ore proportioning be that (manganese in its medium-low carbon ferromanganese mainly comes from manganese ore based on setting the component content demand of manganese, iron in low carbon ferromanganese, iron mainly comes from dedusting ash, therefore can require to set out demand proportioning raw materials according to its component content).To be the setting of carbonaceous material proportioning be for next based on producing the demand of carbon content in the demand of reduction reaction to carbon, low carbon ferromanganese and setting according to the utilising efficiency of carbon.The setting of quartz sand, fluorite sets based on needing to regulate good slag state and basicity in steel-making dedusting ash and the molten point process of manganese ore.
That is, the effect that manganese ore, steel-making dedusting ash play is: the iron providing low carbon ferromanganese to need, manganese element, and composition will cause the change of low carbon ferromanganese composition greater or less than its ratio; The Main Function of carbonaceous material is to provide carbon and ferriferous oxide, V 2o 5reaction, a part of carbon also needs to fuse in iron liquid simultaneously, when the additional proportion of carbonaceous material is too small, under existing utilization ratio condition, Fe forms, MnO can not be reduced fully completely, and the carbon content of fusing into iron liquid reduces, when the additional proportion of carbonaceous material (carbon dust) is excessive, cause the waste of resource, and the carbon content of fusing into iron liquid exceeds cast iron upper range; The effect of quartz sand is to regulate raw material to melt slag state and the basicity of point process, reaches slag state better, is easy to the effect of slag sluicing system, the add-on of quartz sand is excessive or too small, slag state will be caused poor, and slag sluicing system difficulty, is unfavorable for the abundant efficient recovery of valuable resource in slag, dedusting ash.Acting on of fluorite regulates slag state, and make slag state better, be easy to slag sluicing system, add-on is too small, and slag state is thicker, slag sluicing system difficulty, and add-on is excessive, serious to the etch of furnace lining, and causes the wasting of resources.
The setting of molten iron temperature is dissolved based on carbonaceous material and reduction reaction demand occurs, and the temperature losses of the process that taps a blast furnace is comparatively large, for ensureing that iron enters in iron ladle with liquid state, needs suitable molten iron temperature.If molten iron temperature is too low, reaction is abundant not, and owing to tapping a blast furnace temperature losses of the process comparatively greatly, iron liquid does not enter iron ladle and solidifies, difficulty of tapping a blast furnace.If molten iron temperature is too high, electric power resource will be caused to waste (mineral hot furnace melt raw material adopts electric power energy), make production cost increase.The setting of soaking time is too short, and in mineral hot furnace, reaction is insufficient, if the setting of soaking time is long, then makes the production time extend, be unfavorable for organization of production, the used time causes electric power resource to waste, and makes production cost increase.
In order to understand above-mentioned exemplary embodiment of the present invention better, below in conjunction with concrete example, it is further described.
Example 1
Join in mineral hot furnace by steel-making dedusting ash, the manganese ore of 51.8 parts, the quartz sand of 1.5 parts, the carbon dust of 12 parts, the fluorite of 0.7 part of 34 parts by weight, total Intake Quantity 12t, carries out adding hot melt and divides.After load melting, carry out insulation 1 hour, in stove, bonded hard ferrite magnet is 1570 DEG C, obtains low carbon ferromanganese liquid and molten point slag.After insulation, a molten point slag is put into slag ladle, iron liquid is gone out in iron ladle, then is cast into fritter, after cooling, fragmentation, obtain ferromanganese alloy.This ferromanganese alloy composition is: Mn 50%, C 0.4%, Si 1.2%, P 0.08%, S 0.04%, surplus are iron.
Wherein, SiO is contained in steel-making dedusting ash 28%, CaO 25%, TFe 65.7%, P 0.05%, S 0.05% and MnO 1.2%, granularity≤5mm.Containing MnO 52%, Fe in manganese ore 2o 36%, CaO 16%, SiO 215%, Al 2o 37%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.Containing SiO in quartz sand 296%, P 0.01% and S 0.005%, granularity≤3mm.Containing fixed carbon 95%, P0.05% and S 0.05% in carbon dust, granularity≤3mm.Containing CaF in fluorite 292%, SiO 27.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 2
Join in mineral hot furnace by steel-making dedusting ash, the manganese ore of 53 parts, the quartz sand of 2.2 parts, the carbon dust of 14 parts, the fluorite of 0.8 part of 30 parts by weight, total Intake Quantity 14t, carries out adding hot melt and divides.After load melting, carry out insulation 1.5 hours, in stove, bonded hard ferrite magnet is 1630 DEG C, obtains low carbon ferromanganese liquid and molten point slag.After insulation, a molten point slag is put into slag ladle, iron liquid is gone out in iron ladle, then is cast into fritter, after cooling, fragmentation, obtain ferromanganese alloy.This ferromanganese alloy composition is: Mn 53%, C 0.5%, Si 1.5%, P 0.07%, S 0.05%, surplus are iron.
Wherein, SiO is contained in steel-making dedusting ash 28%, CaO 23.7%, TFe 67%, P 0.06%, S 0.04% and MnO 1.2%, granularity≤5mm.Containing MnO 55%, Fe in manganese ore 2o 36%, CaO 14%, SiO 215%, Al 2o 36%, MgO 3.9%, P 0.07% and S 0.03%, granularity≤20mm.Containing SiO in quartz sand 296%, P 0.01% and S 0.005%, granularity≤3mm.Containing fixed carbon 93%, P0.04% and S 0.04% in carbon dust, granularity≤3mm.Containing CaF in fluorite 293%, SiO 26.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 3
Join in mineral hot furnace by steel-making dedusting ash, the manganese ore of 50 parts, the quartz sand of 3 parts, the carbon dust of 10 parts, the fluorite of 0.5 part of 36.5 parts by weight, total Intake Quantity 10t, carries out adding hot melt and divides.After load melting, carry out insulation 1 hour, in stove, bonded hard ferrite magnet is 1550 DEG C, obtains low carbon ferromanganese liquid and molten point slag.After insulation, a molten point slag is put into slag ladle, iron liquid is gone out in iron ladle, then is cast into fritter, after cooling, fragmentation, obtain ferromanganese alloy.This ferromanganese alloy composition is: Mn 48%, C 0.2%, Si 1.2%, P 0.08%, S 0.04%, surplus are iron.
Wherein, SiO is contained in steel-making dedusting ash 28%, CaO 24.9%, TFe 65%, P 0.07%, S 0.03% and MnO 2%, granularity≤5mm.Containing MnO 58%, Fe in manganese ore 2o 36%, CaO 13%, SiO 212%, Al 2o 36%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.Containing SiO in quartz sand 293%, P 0.01% and S 0.005%, granularity≤3mm.Containing fixed carbon 91%, P0.04% and S 0.04% in carbon dust, granularity≤3mm.Containing CaF in fluorite 291%, SiO 28.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 4
Join in mineral hot furnace by steel-making dedusting ash, the manganese ore of 45 parts, the quartz sand of 1 part, the carbon dust of 13 parts, the fluorite of 1 part of 40 parts by weight, total Intake Quantity 15t, carries out adding hot melt and divides.After load melting, carry out insulation 1 hour, in stove, bonded hard ferrite magnet is 1650 DEG C, obtains low carbon ferromanganese liquid and molten point slag.After insulation, a molten point slag is put into slag ladle, iron liquid is gone out in iron ladle, then is cast into fritter, after cooling, fragmentation, obtain ferromanganese alloy.This ferromanganese alloy composition is: Mn 45%, C 0.6%, Si 2%, P 0.06%, S 0.04%, surplus are iron.
Wherein, SiO is contained in steel-making dedusting ash 27%, CaO 22.9%, TFe 68%, P 0.06%, S 0.04% and MnO 2%, granularity≤5mm.Containing MnO 60%, Fe in manganese ore 2o 36%, CaO 12%, SiO 212%, Al 2o 35%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.Containing SiO in quartz sand 297%, P 0.01% and S 0.005%, granularity≤3mm.Containing fixed carbon 95%, P0.04% and S 0.04% in carbon dust, granularity≤3mm.Containing CaF in fluorite 289.9%, SiO 210%, P 0.05% and S 0.05%, granularity≤10mm.
Method of the present invention is to make steel dedusting ash, manganese ore, quartz sand, carbon dust and fluorite for raw material, join in mineral hot furnace by rational proportioning raw materials, carry out adding hot melt to divide, after load melting, after controlling suitable soaking time, obtain low carbon ferromanganese, have that technique is simple, metallic iron, manganese yield advantages of higher.In addition, utilization steel-making dedusting ash, manganese ore are raw material, smelting cost is low, and carry out fully effectively utilizing to the manganese metal resource in metallic iron resource in steel-making dedusting ash and manganese ore, solve the environmental problem that iron and steel enterprise causes due to steel-making dedusting ash bulk deposition, meanwhile, for manganese resource carries out fully effectively utilizing opening new way.
Although above by describing the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that when not departing from the spirit and scope that claim limits, various amendment and change can be carried out to exemplary embodiment of the present invention.

Claims (5)

1. a smelting process for low carbon ferromanganese, is characterized in that, described smelting process comprises the following steps:
By weight, the fluorite of the steel-making dedusting ash of 30 ~ 40 parts, the manganese ore of 45 ~ 60 parts, the quartz sand of 1 ~ 3 part, the carbonaceous material of 10 ~ 15 parts and 0.5 ~ 1 part is added in mineral hot furnace and carries out adding hot melt and divide, wherein, by weight percentage, SiO is contained in described steel-making dedusting ash 25 ~ 8%, CaO 15 ~ 25%, TFe 50 ~ 70%, P≤0.1%, S≤0.05% and MnO 1 ~ 2%, containing MnO 40 ~ 60%, Fe in described manganese ore 2o 35 ~ 10%, CaO 10 ~ 20%, SiO 210 ~ 20%, Al 2o 33 ~ 8%, MgO≤5%, P≤0.1% and S≤0.05%, containing SiO in described quartz sand 2>=90%, P≤0.01% and S≤0.01%, containing CaF in described fluorite 2>=85%, SiO 25 ~ 10%, P≤0.1% and S≤0.05%; Described carbonaceous material is carbon dust, and it is by weight percentage containing C gu>=90%, P≤0.1% and S≤0.05%;
After load melting, to be incubated and the molten iron temperature controlled in stove in molten bath is 1550 ~ 1650 DEG C, to obtain low carbon ferromanganese liquid and a molten point slag;
Be separated with a molten point slag by described low carbon ferromanganese liquid, the composition of the low carbon ferromanganese liquid obtained is the iron of Mn 45 ~ 55%, C 0.2 ~ 0.7%, Si 1.0 ~ 2.0%, P≤0.1%, S≤0.05% and surplus by weight percentage.
2. the smelting process of low carbon ferromanganese according to claim 1, it is characterized in that, described smelting process by by weight 32 ~ 38 parts steel-making dedusting ash, the manganese ore of 50 ~ 58 parts, the quartz sand of 1.5 ~ 2.5 parts, the carbonaceous material of 12 ~ 14 parts and 0.6 ~ 0.8 part fluorite add in mineral hot furnace and carry out adding hot melt and divide.
3. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, the granularity≤5mm of described steel-making dedusting ash, granularity≤the 20mm of described manganese ore, granularity≤the 3mm of described quartz sand, the granularity≤3mm of described carbonaceous material, the granularity≤10mm of described fluorite.
4. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, the time of described insulation is 1 ~ 1.5 hour.
5. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, described smelting process also comprises described low Carbon Manganese iron liquid casting, cooling and break process are obtained ferromanganese alloy.
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