CN103643056A - Smelting method of low-carbon ferromanganese - Google Patents
Smelting method of low-carbon ferromanganese Download PDFInfo
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Abstract
The invention provides a smelting method of low-carbon ferromanganese, which comprises the following steps: heating to melt 30-40 parts by weight of steelmaking dust removal ash, 45-60 parts by weight of manganese ore, 1-3 parts by weight of quartz sand, 10-15 parts by weight of carbonous material and 0.5-1 part by weight of fluorite in a submerged arc furnace; after the furnace materials are molten, keeping the temperature, controlling the temperature of the molten iron in the melting bath in the furnace at 1550-1650 DEG C to obtain a low-carbon ferromanganese liquid and melting slag, and separating, wherein the obtained low-carbon ferromanganese liquid comprises the following components in percentage by weight: 45-55% of Mn, 0.2-0.7% of C, 1.0-2.0% of Si, at most 0.1% of P, at most 0.05% of S and the balance of iron. The method sufficiently and effectively utilizes metal iron resources in the steelmaking dust removal ash and metal manganese resources in the manganese ores, solves the environmental problem caused by abundant accumulation of the steelmaking dust removal ash in the steel enterprise, opens up a new way for sufficient and effective utilization of the manganese ore resources, and has the advantages of simple technique, high yield of metal iron and manganese, and low smelting cost.
Description
Technical field
The present invention relates to alloy smelting field, more particularly, relate to a kind of method that steel-making dedusting ash, manganese ore, carbonaceous material, quartz sand, fluorite be raw material smelting low carbon ferromanganese of take.
Background technology
Low carbon ferromanganese is mainly that ferromanganese is a kind of reductor and alloying material with the most use in STEELMAKING PRODUCTION by manganese, two kinds of elementary composition alloys of iron.Ferromanganese, as alloying element additive, can strengthen hardness, ductility, toughness and the fastness to wear of steel.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 50～70% manganese by weight percentage, 3～5% silicon, and the carbon lower than 1.0%, the phosphorus lower than 0.1%, the sulphur lower than 0.02%, is no more than other impurity of 2%, and surplus is iron.Its preparation method comprises: select percentage composition by weight to calculate carbon containing lower than 1.0% scrap steel, adding the calcium that accounts for steel weight 13～15% is dephosphorization agent, and wherein, calcium is that in dephosphorization agent, silicon weight content is 30～35%; After above-mentioned raw materials all melts, add slag supplying agent slag making, after slag making, add again deslagging agent slagging-off, keep furnace temperature at 1350 ± 30 ℃, then add successively manganese to refine, then tapping casting becomes ingot.In this application, the phosphorus of resulting manganeseirom and carbon content, lower than the requirement of steel, have solved phosphorus and the too high problem of carbon content in existing manganeseirom.
Publication number is that the Chinese patent of CN102586669A discloses a kind of method of producing low carbon ferromanganese, with electrolytic metal Mn sheet or electrolytic metal manganese powder, do raw material, add 0.5～30% iron, adopt intermediate frequency furnace by electrolytic metal Mn sheet and iron melting, when ingot casting, limit casting, limit is sprinkled into electrolytic metal Mn sheet or electrolytic metal manganese powder in mold, low carbon ferromanganese parcel electrolytic metal Mn sheet or the electrolytic metal manganese powder of melting form a whole ingot casting, then ingot casting is broken into low carbon ferromanganese.With with the low carbon ferromanganese that scorification is produced, compare completely, its product foreign matter content is lower slightly, product antioxidant property is identical, 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, this method is produced low carbon ferromanganese, the operation of three kinds of production method organic linking linkages of the outer shaking ladle dilution processing of refining slag hearth by the rich manganese slag of blast-furnace smelting, electric refining furnaces, smelt the whole hot charging heat of pilot process (liquid rich manganese slag → electric refining furnaces, liquid low-carbon (LC) silicomanganese → electric refining furnaces, the outer shaking ladle of refining slag → stove) and convert, produce the low carbon ferromanganese that meets national standard (GB/T3795-1996).Successfully solved the production difficult problem that main raw material resource is nervous, price is high, product comprehensive energy consumption is high, products production cost is high existing 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.After this production technique comprises and adds carboloy remover to melt by electric arc furnace with useless manganese powder or manganese-silicon, add again dephosphorization agent, desulfuration agent to send into shaking ladle and carry out preliminary desiliconization, thereby 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, obtain the low carbon ferromanganese of high-quality.This invention production cost is low, save energy resource, has reduced environmental pollution, and waste residue can be used as cement mill raw material.
Although disclose the method for some smelting low carbon manganeseiroms in prior art, had the shortcomings such as cost is high, complex process.
Summary of the invention
For the deficiencies in the prior art, one of object of the present invention is to solve the one or more problems that exist in above-mentioned prior art.
One of object of the present invention is to provide a kind of and is take the method that steel-making dedusting ash, manganese ore, quartz sand, carbonaceous material and fluorite be 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, 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 and in mineral hot furnace, adds hot melt and divide; After furnace charge fusing, being incubated and controlling the molten iron temperature in molten bath in stove is 1550～1650 ℃, obtains low carbon ferromanganese liquid and molten minute slag; Described low carbon ferromanganese liquid and molten minute slag are carried out separated, the composition of the low carbon ferromanganese liquid obtaining 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.
The smelting process of low carbon ferromanganese embodiment according to the present invention, described smelting process adds the fluorite of the 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 of 32～38 parts by weight and 0.6～0.8 part in mineral hot furnace, to add hot melt and divide.
The smelting process of low carbon ferromanganese embodiment according to the present invention, by weight percentage, contains SiO 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 the present invention, the smelting process of low carbon ferromanganese embodiment, by weight percentage, contains 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%.
According to the present invention, the smelting process of low carbon ferromanganese embodiment, by weight percentage, contains SiO in described quartz sand
2>=90%, P≤0.01% and S≤0.01%.
The smelting process of low carbon ferromanganese embodiment according to the present invention, described carbonaceous material is carbon dust, it contains C by weight percentage
gu>=90%, P≤0.1% and S≤0.05%.
According to the present invention, the smelting process of low carbon ferromanganese embodiment, by weight percentage, contains CaF in described fluorite
2>=85%, SiO
25～10%, P≤0.1% and S≤0.05%.
The smelting process of low carbon ferromanganese embodiment according to 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.
The smelting process of low carbon ferromanganese embodiment according to the present invention, the time of described insulation is 1～1.5 hour.
The smelting process of low carbon ferromanganese embodiment according to 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.
The smelting process of low carbon ferromanganese embodiment according to the present invention, described smelting process also comprises described low Carbon Manganese iron liquid casting, cooling and break process is obtained to low carbon ferromanganese alloy.
Compared with prior art, beneficial effect of the present invention comprises: utilizing steel-making dedusting ash, manganese ore is raw material, smelting cost is low, manganese metal resource in metallic iron resource and manganese ore in steel-making dedusting ash has been carried out fully effectively utilizing, solved 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 and having opened up new way.Have that technique is simple, metallic iron, manganese yield advantages of higher.
Embodiment
Hereinafter, in connection with exemplary embodiment, describe the smelting process according to low carbon ferromanganese of the present invention in detail.
Contriver finds, makes steel at present dedusting ash bulk deposition, the environmental problem that is not utilized effectively and causes, and the metallic iron that contains high level in steel-making dedusting ash, and for this reason, contriver proposes a kind of method that adopts 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 employing, making steel dedusting ash, manganese ore, quartz sand, carbonaceous material (for example, carbon dust, coal dust) and fluorite is that raw material adds hot melt and divides (within molten minute, referring to the abbreviation that fusing is separated) in mineral hot furnace.Specifically comprise 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 and in mineral hot furnace, adds hot melt and divide, wherein, the heating total amount of each raw material is 10～15t; After furnace charge fusing, being incubated 1～1.5 hour and controlling the molten iron temperature in molten bath in stove is 1550～1650 ℃, obtains low carbon ferromanganese liquid and molten minute slag; Then, described low carbon ferromanganese liquid and molten minute slag are carried out separated, wherein, will melt a minute slag and put into slag ladle, low carbon ferromanganese liquid is gone out to iron ladle, then be cast into fritter, after cooling, fragmentation, obtain low carbon ferromanganese alloy.The composition of this low carbon 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, in steel-making dedusting ash, contain SiO
25～8%, CaO 15～25%, TFe 50～70%, P≤0.1%, S≤0.05% and MnO 1～2%, granularity≤5mm.In manganese ore, contain MnO 40～60%, Fe
2o
35～10%, CaO 10～20%, SiO
210～20%, Al
2o
33～8%, MgO≤5%, P≤0.1% and S≤0.05%, granularity≤20mm.In quartz sand, contain SiO
2>=90%, P≤0.01% and S≤0.01%, granularity≤3mm.Carbonaceous material is carbon dust, contains fixed carbon >=90%, P≤0.1% and S≤0.05%, granularity≤3mm in carbon dust.In fluorite, contain CaF
2>=85%, SiO
25～10%, P≤0.1% and S≤0.05%, granularity≤10mm.
Preferably, each proportioning raw materials is 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 the fluorite of 0.6～0.8 part by weight.
In the present invention, relating to principal reaction principle is: 1. each raw material is melted into liquid state after being heated in mineral hot furnace; 2. the carbon of melting reacts with the ferriferous oxide in iron liquid, is reduced to liquid metal iron; 3. the carbon of melting reacts with MnO, and the liquid manganese of generation that reduced enters into iron liquid.
The reason of each proportioning raw materials setting is: the setting that is first bessemer furnace slag and manganese ore proportioning is that (manganese in its medium-low carbon ferromanganese mainly comes from manganese ore based on the component content demand of manganese, iron being set 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).Next is that the setting of carbonaceous material proportioning is based on producing reduction reaction to the demand of carbon content in the demand of carbon, low carbon ferromanganese and setting according to the utilising efficiency of carbon.The setting of quartz sand, fluorite is to set based on needing to regulate good slag state and basicity in steel-making dedusting ash and the molten minute process of manganese ore.
That is to say, the effect that manganese ore, steel-making dedusting ash play is: the iron, the manganese element that provide low carbon ferromanganese to need, 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, iron oxidation, 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 slag state and the basicity of the molten minute process of raw material, reaches slag state better, is easy to the effect of slag iron separation, the add-on of quartz sand is excessive or too small, to cause slag state poor, slag iron separation difficulty, is unfavorable for the abundant efficient recovery of valuable resource in slag, dedusting ash.Acting on of fluorite regulates slag state, makes slag state better, is easy to slag iron separated, and add-on is too small, and slag state is thicker, slag iron separation 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 dissolve and reduction reaction demand occurs based on carbonaceous material, and the temperature losses of the process that taps a blast furnace is larger, for guaranteeing that iron enters in iron ladle with liquid state, needs suitable molten iron temperature.If molten iron temperature is too low, react abundant not, and because the temperature losses of the process that taps a blast furnace is larger, iron liquid does not enter iron ladle and solidifies, the difficulty of tapping a blast furnace.If molten iron temperature is too high, will cause electric power resource waste (mineral hot furnace melt raw material adopts electric power energy), make production cost increase.The setting of soaking time is too short, reacts insufficient in mineral hot furnace, if the setting of soaking time is long, makes the production time extend, and is unfavorable for organization of production, and the used time is caused electric power resource waste, makes production cost increase.
In order to understand better above-mentioned exemplary embodiment of the present invention, below in conjunction with concrete example, it is further described.
Example 1
The 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 are by weight joined in mineral hot furnace, and total Intake Quantity 12t, adds hot melt and divides.After furnace charge fusing, be incubated 1 hour, in stove, iron liquid temp is 1570 ℃, obtains low carbon ferromanganese liquid and molten minute slag.After insulation, will melt a minute slag and put into slag ladle, and iron liquid be gone out to iron ladle, then be cast into fritter, after cooling, fragmentation, obtain low carbon ferromanganese alloy.This low carbon ferromanganese alloying constituent is: Mn 50%, C 0.4%, Si 1.2%, P 0.08%, S 0.04%, surplus are iron.
Wherein, in steel-making dedusting ash, contain SiO
28%, CaO 25%, TFe 65.7%, P 0.05%, S 0.05% and MnO 1.2%, granularity≤5mm.In manganese ore, contain MnO 52%, Fe
2o
36%, CaO 16%, SiO
215%, Al
2o
37%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.In quartz sand, contain SiO
296%, P 0.01% and S 0.005%, granularity≤3mm.In carbon dust, contain fixed carbon 95%, P0.05% and S 0.05%, granularity≤3mm.In fluorite, contain CaF
292%, SiO
27.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 2
The 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 are by weight joined in mineral hot furnace, and total Intake Quantity 14t, adds hot melt and divides.After furnace charge fusing, be incubated 1.5 hours, in stove, iron liquid temp is 1630 ℃, obtains low carbon ferromanganese liquid and molten minute slag.After insulation, will melt a minute slag and put into slag ladle, and iron liquid be gone out to iron ladle, then be cast into fritter, after cooling, fragmentation, obtain low carbon ferromanganese alloy.This low carbon ferromanganese alloying constituent is: Mn 53%, C 0.5%, Si 1.5%, P 0.07%, S 0.05%, surplus are iron.
Wherein, in steel-making dedusting ash, contain SiO
28%, CaO 23.7%, TFe 67%, P 0.06%, S 0.04% and MnO 1.2%, granularity≤5mm.In manganese ore, contain MnO 55%, Fe
2o
36%, CaO 14%, SiO
215%, Al
2o
36%, MgO 3.9%, P 0.07% and S 0.03%, granularity≤20mm.In quartz sand, contain SiO
296%, P 0.01% and S 0.005%, granularity≤3mm.In carbon dust, contain fixed carbon 93%, P0.04% and S 0.04%, granularity≤3mm.In fluorite, contain CaF
293%, SiO
26.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 3
The 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 are by weight joined in mineral hot furnace, and total Intake Quantity 10t, adds hot melt and divides.After furnace charge fusing, be incubated 1 hour, in stove, iron liquid temp is 1550 ℃, obtains low carbon ferromanganese liquid and molten minute slag.After insulation, will melt a minute slag and put into slag ladle, and iron liquid be gone out to iron ladle, then be cast into fritter, after cooling, fragmentation, obtain low carbon ferromanganese alloy.This low carbon ferromanganese alloying constituent is: Mn 48%, C 0.2%, Si 1.2%, P 0.08%, S 0.04%, surplus are iron.
Wherein, in steel-making dedusting ash, contain SiO
28%, CaO 24.9%, TFe 65%, P 0.07%, S 0.03% and MnO 2%, granularity≤5mm.In manganese ore, contain MnO 58%, Fe
2o
36%, CaO 13%, SiO
212%, Al
2o
36%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.In quartz sand, contain SiO
293%, P 0.01% and S 0.005%, granularity≤3mm.In carbon dust, contain fixed carbon 91%, P0.04% and S 0.04%, granularity≤3mm.In fluorite, contain CaF
291%, SiO
28.9%, P 0.05% and S 0.05%, granularity≤10mm.
Example 4
The 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 are by weight joined in mineral hot furnace, and total Intake Quantity 15t, adds hot melt and divides.After furnace charge fusing, be incubated 1 hour, in stove, iron liquid temp is 1650 ℃, obtains low carbon ferromanganese liquid and molten minute slag.After insulation, will melt a minute slag and put into slag ladle, and iron liquid be gone out to iron ladle, then be cast into fritter, after cooling, fragmentation, obtain low carbon ferromanganese alloy.This low carbon ferromanganese alloying constituent is: Mn 45%, C 0.6%, Si 2%, P 0.06%, S 0.04%, surplus are iron.
Wherein, in steel-making dedusting ash, contain SiO
27%, CaO 22.9%, TFe 68%, P 0.06%, S 0.04% and MnO 2%, granularity≤5mm.In manganese ore, contain MnO 60%, Fe
2o
36%, CaO 12%, SiO
212%, Al
2o
35%, MgO 3.9%, P 0.05% and S 0.05%, granularity≤20mm.In quartz sand, contain SiO
297%, P 0.01% and S 0.005%, granularity≤3mm.In carbon dust, contain fixed carbon 95%, P0.04% and S 0.04%, granularity≤3mm.In fluorite, contain CaF
289.9%, SiO
210%, P 0.05% and S 0.05%, granularity≤10mm.
It is raw material that method of the present invention be take steel-making dedusting ash, manganese ore, quartz sand, carbon dust and fluorite, by rational proportioning raw materials, join in mineral hot furnace, adding hot melt divides, after furnace charge fusing, by controlling after suitable soaking time, obtain low carbon ferromanganese, have that technique is simple, a metallic iron, manganese yield advantages of higher.In addition, utilizing steel-making dedusting ash, manganese ore is raw material, smelting cost is low, and the manganese metal resource in metallic iron resource and manganese ore in steel-making dedusting ash has been carried out fully effectively utilizing, solved 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 and having opened up new way.
Although above by having described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that in the situation that do not depart from the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (10)
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 and in mineral hot furnace, add hot melt and divide;
After furnace charge fusing, being incubated and controlling the molten iron temperature in molten bath in stove is 1550～1650 ℃, obtains low carbon ferromanganese liquid and molten minute slag;
Described low carbon ferromanganese liquid and molten minute slag are carried out separated, the composition of the low carbon ferromanganese liquid obtaining 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 adds the fluorite of the 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 of 32～38 parts by weight and 0.6～0.8 part in mineral hot furnace, to add hot melt and divide.
3. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, by weight percentage, in described steel-making dedusting ash, contains SiO
25～8%, CaO 15～25%, TFe 50～70%, P≤0.1%, S≤0.05% and MnO 1～2%.
4. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, by weight percentage, contains 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%.
5. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, by weight percentage, in described quartz sand, contains SiO
2>=90%, P≤0.01% and S≤0.01%.
6. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, described carbonaceous material is carbon dust, and it contains C by weight percentage
gu>=90%, P≤0.1% and S≤0.05%.
7. the smelting process of low carbon ferromanganese according to claim 1, is characterized in that, by weight percentage, in described fluorite, contains CaF
2>=85%, SiO
25～10%, P≤0.1% and S≤0.05%.
8. 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.
9. 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.
10. 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 to low carbon ferromanganese alloy.
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| CN103911486A (en) * | 2014-04-03 | 2014-07-09 | 莱芜钢铁集团有限公司 | Method for removing titanium in molten bearing steel |
| CN104962731A (en) * | 2015-06-30 | 2015-10-07 | 长沙矿冶研究院有限责任公司 | Fine ore sintering method capable of controlling content of residual carbon in manganese ore sinter finished product |
| CN107513633A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | A kind of method that microwave smelts low-grade manganese |
| CN114574641A (en) * | 2022-03-02 | 2022-06-03 | 北京科技大学 | Method for smelting medium-low carbon ferromanganese |
| CN116426814A (en) * | 2023-02-09 | 2023-07-14 | 承德天大钒业有限责任公司 | Method for preparing high-temperature alloy by utilizing intermediate alloy waste |
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| CN103911486A (en) * | 2014-04-03 | 2014-07-09 | 莱芜钢铁集团有限公司 | Method for removing titanium in molten bearing steel |
| CN103911486B (en) * | 2014-04-03 | 2016-04-20 | 莱芜钢铁集团有限公司 | A kind of method removing titanium in bearing steel molten steel |
| CN104962731A (en) * | 2015-06-30 | 2015-10-07 | 长沙矿冶研究院有限责任公司 | Fine ore sintering method capable of controlling content of residual carbon in manganese ore sinter finished product |
| CN104962731B (en) * | 2015-06-30 | 2017-04-12 | 长沙矿冶研究院有限责任公司 | Fine ore sintering method capable of controlling content of residual carbon in manganese ore sinter finished product |
| CN107513633A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | A kind of method that microwave smelts low-grade manganese |
| CN114574641A (en) * | 2022-03-02 | 2022-06-03 | 北京科技大学 | Method for smelting medium-low carbon ferromanganese |
| CN116426814A (en) * | 2023-02-09 | 2023-07-14 | 承德天大钒业有限责任公司 | Method for preparing high-temperature alloy by utilizing intermediate alloy waste |
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