CN115522083B - Method for reducing crushing difficulty of high-carbon ferrochrome - Google Patents

Method for reducing crushing difficulty of high-carbon ferrochrome Download PDF

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CN115522083B
CN115522083B CN202211247381.4A CN202211247381A CN115522083B CN 115522083 B CN115522083 B CN 115522083B CN 202211247381 A CN202211247381 A CN 202211247381A CN 115522083 B CN115522083 B CN 115522083B
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crushing
pouring
controlled
smelting
carbon ferrochrome
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CN115522083A (en
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王先武
曾仁福
高希虎
郝荣璐
王光胜
王彦文
刘保华
冯选杰
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Jiayuguan Hongdian Ferroalloy Co ltd
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Jiayuguan Hongdian Ferroalloy Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/06—Alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/06—Alloys based on chromium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

The invention relates to the technical field of high-carbon ferrochrome smelting, in particular to a method for reducing the crushing difficulty of high-carbon ferrochrome, which is characterized in that the granularity of raw materials of the high-carbon ferrochrome fed into a furnace is adjusted, and meanwhile, rich slag with higher purity is matched, so that the contact area of a mineral seed reduction process is increased, and meanwhile, the reduction efficiency is improved; in addition, the secondary voltage can be increased by 5v during smelting, and the parameters of the front, middle and later stages of the smelting process are reasonably controlled to change so that the silicon content in the alloy components reaches 3.5+/-0.5 percent and the carbon content reaches 6.8-7.5 percent; finally, matching a multi-layer pouring mode in the pouring process, wherein the thickness of each pouring is not more than 60mm, pouring water for 2-3 times after the pouring is finished, and performing primary crushing until the temperature is lower than 110-240 ℃, wherein the primary coarse crushing granularity is controlled within 400 mm; the invention can reduce the production cost, reduce the crushing difficulty, ensure the normal operation of the crushing equipment and reduce the maintenance cost.

Description

Method for reducing crushing difficulty of high-carbon ferrochrome
Technical Field
The invention relates to the technical field of high-carbon ferrochrome smelting, in particular to a method for reducing the crushing difficulty of high-carbon ferrochrome.
Background
High carbon ferrochrome is the most important raw material for producing stainless steel, and is mainly applied to producing stainless steel, ball bearing steel, tool steel, nitriding steel, hot-strength steel, quenched and tempered steel, carburizing steel, hydrogen-resistant steel and the like. The ore seeds used for smelting high-carbon ferrochrome in the prior art mainly comprise fusible refractory, refractory and reducible refractory, and the refractory and reducible ore seeds with the proportion of more than 40% are matched to reduce the crushing difficulty, but are uneconomical and have high ore preparation cost. Under the condition of utilizing the existing low-price ore seeds, the reduction of the crushing difficulty of high-carbon ferrochrome is worth considering innovatively from various ways such as grain size of raw materials entering a furnace, adjustment and optimization of the front, middle and later stages of operation, water quenching after casting, feeding in the crushing process and the like, so that the crushing capacity is improved and the benefit loss is reduced under the condition that equipment is not greatly improved.
Disclosure of Invention
The invention aims to provide a method for reducing the crushing difficulty of high-carbon ferrochrome, which reduces the crushing difficulty of high-carbon ferrochrome and reduces the maintenance cost of crushing equipment.
The invention discloses a method for reducing the crushing difficulty of high-carbon ferrochrome, which comprises the following steps:
s1, raw material adjustment:
the granularity of the raw materials of the high-carbon ferrochrome fed into the furnace is adjusted to 5mm-50mm, and refractory ore seeds are matched; when 100% of raw materials are mixed under the condition of no clinker, the proportion of refractory mineral ores in the material mixing process is less than or equal to 15%, the proportion of main stream ores is controlled to be 16% -18%, and the proportion of easily-melted refractory mineral seeds is controlled to be 65% -68%;
s2, rich slag matching:
the ratio of the rich slag is controlled at 7% +/-0.5%;
s3, smelting control:
after raw materials in the step S1 and the step S2 are matched and fed into a furnace, the secondary voltage is increased by 5V, and three-phase current is kept stable in the later period of smelting, so that the power factor in the earlier period of smelting, the power factor in the middle period of smelting and the change rhythm of the power factor in the later period of smelting are controlled to be 0.85-0.8-0.75;
s4, casting:
multi-layer casting is adopted in the casting process, the thickness of each casting is not more than 60mm, and water is repeatedly poured until the alloy temperature is reduced to 110-240 ℃ after the casting is condensed;
s5, alloy crushing:
early crushing is needed in the alloy cleaning process, and the primary coarse crushing granularity is less than or equal to 400mm.
Further, in the step S1, the silicon content is 3.5% +/-0.5%; the carbon content is 6.8% -7.5%.
Further, in the step S3, the slag temperature of the alloy tapping temperature is controlled to 1600+/-10 ℃, and the silicon dioxide in the slag is controlled to 30% -32%.
Further, in step S4, water is poured from 20 minutes after pouring, the water pouring time cannot exceed 20 minutes each time, water pouring cannot be performed in a concentrated manner, and the water pouring time is 10 minutes each time; after the pouring iron is poured, the temperature of the pouring iron is measured by a temperature measuring gun each time, and the pouring iron is stopped when the temperature reaches 110-240 ℃.
In the step S1, the granularity of the high-carbon ferrochrome charged raw material is adjusted from 5-100mm to 5-50mm, so that the contact area of solid-solid reduction of mineral seeds is increased, and the reduction efficiency is improved. When raw materials are 100% blended under the condition of no clinker, the matching result of ore seeds is optimized, the economy of raw material matching is considered, the reduction of crushing difficulty is also considered, the proportion of refractory ore is controlled within 15%, the proportion of main stream ore is controlled between 16% and 18%, the proportion of easily-melted and difficultly-reduced ore seeds is controlled between 65% and 68%, and the economic batching model can enable the silicon content and the carbon content in the smelting process to reach the required range. The silicon content is 3.5% ± 0.5% and the carbon content is 6.8% ± 0.5%.
In the step S3, the secondary voltage is increased by 5v, the alloy can be fully reduced in the later stage of smelting, the metal drops of the alloy solid-solid reduction are reduced, and the crushing difficulty is reduced. Particularly, three-phase current is kept stable in the later stage of smelting, the three-phase current is controlled to be stable and simultaneously to show a slow increasing trend as much as possible, and the power factor can be increased in a mode of gradually lifting the electrode in electrode operation, so that the power factor in the earlier stage of smelting process, the power factor in the middle stage of smelting process and the change rhythm of the power factor in the later stage of smelting process are controlled to be 0.85-0.8-0.75
In the step S4, a multi-layer casting mode is adopted, the casting thickness is not more than 60mm each time, intermittent casting is adopted in the casting process of a large pool, and one-time casting of molten iron in a ladle is not easy to finish; in the casting process by using the fixed die, the ladle is slowly and intermittently cast back and forth; repeatedly watering the alloy poured in the large pool after the alloy is condensed until the temperature of the alloy is reduced to 110-240 ℃; and pouring the alloy poured by the fixed die into an iron bucket, and pouring water back and forth in a pool until the alloy temperature is reduced to 110-240 ℃.
In step S5, the crushing may be performed by using a tamping car.
The beneficial effects of the invention are as follows: the granularity of the raw materials of the high-carbon ferrochrome fed into the furnace is adjusted, and meanwhile, rich slag with higher purity is matched, so that the contact area of the ore seeds in the reduction process is increased, and the reduction efficiency is improved; in addition, the secondary voltage can be increased by 5v during smelting, and the parameters of the front, middle and later stages of the smelting process are reasonably controlled to change so that the silicon content in the alloy components reaches 3.5+/-0.5 percent and the carbon content reaches 6.8-7.5 percent; finally, matching a multi-layer pouring mode in the pouring process, wherein the thickness of each pouring is not more than 60mm, pouring water for 2-3 times after the pouring is finished, and performing primary crushing until the temperature is lower than 110-240 ℃, wherein the primary coarse crushing granularity is controlled within 400 mm; the invention can reduce the production cost, reduce the crushing difficulty, ensure the normal operation of the crushing equipment and reduce the maintenance cost.
Detailed Description
The invention discloses a method for reducing the crushing difficulty of high-carbon ferrochrome, which comprises the following steps:
s1, raw material adjustment:
the granularity of the raw materials of the high-carbon ferrochrome fed into the furnace is adjusted to 5mm-50mm, and refractory ore seeds are matched; when 100% of raw materials are mixed under the condition of no clinker, the proportion of refractory mineral ores in the material mixing process is less than or equal to 15%, the proportion of main stream ores is controlled to be 16% -18%, and the proportion of easily-melted refractory mineral seeds is controlled to be 65% -68%; the coke matching proportion is about 15%, the semi-coke can be properly matched within 1.6%, the silica is matched within 5.1% -5.5%, the serpentine is matched within 4.2% -5.5%, the serpentine is matched for supplementing Mg components in raw materials, the proportion of Mg and Al in the raw materials is regulated, and the slag former can play a role;
s2, rich slag matching:
the ratio of the rich slag is controlled at 7% +/-0.5%;
s3, smelting control:
after raw materials in the step S1 and the step S2 are matched and fed into a furnace, the secondary voltage is increased by 5V, and three-phase current is kept stable in the later period of smelting, so that the power factor in the earlier period of smelting, the power factor in the middle period of smelting and the change rhythm of the power factor in the later period of smelting are controlled to be 0.85-0.8-0.75; in the smelting process, the three-phase electrode has balanced current, stable electrode, good air permeability, no spark, and uniform sinking of furnace burden. The slag temperature of the alloy tapping temperature is controlled at 1600+/-10 ℃, the silicon dioxide in the slag is controlled at 30% -32%, and the alloy silicon content is 3.5+/-0.5%; the carbon content of the alloy is 6.8 percent plus or minus 0.5 percent.
S4, casting:
multi-layer casting is adopted in the casting process, the thickness of each casting is not more than 60mm, and water is repeatedly poured until the alloy temperature is reduced to 110-240 ℃ after the casting is condensed; the pouring is started to take water 20 minutes later, the water taking time of each time cannot exceed 20 minutes, the water taking cannot be concentrated, and the water taking time of each time is 10 minutes; after the pouring iron is poured, the temperature of the pouring iron is measured by a temperature measuring gun each time, and the pouring iron is stopped when the temperature reaches 110-240 ℃.
S5, alloy crushing:
early crushing is needed in the alloy cleaning process, and the primary coarse crushing granularity is less than or equal to 400mm.
Further, in the step S1, the silicon content is 3.5% +/-0.5%; the carbon content is 6.8% -7.5%.
Embodiment one:
the method is used for crushing high-carbon ferrochrome.
Five chromium ore raw materials are matched according to an economic batching model, the granularity of the chromium ore raw materials is controlled to be 5mm-50mm, the total matching proportion of the chromium ore is controlled to be 65% -68%, wherein the proportion of the Tibetan ore in the total chromium ore is 15.0%, and the proportion of the chromium ore raw materials is 67.1%; silica 5.4%, coke 14.5%, serpentine 4.7%, semi-coke 1.6% and slag 6.7%; uniformly mixing the raw materials and then feeding the mixture into a furnace; the reduction and melting composition of each ore is fusible refractory, refractory and refractory.
Adding the mixed materials into an ore heating furnace, and improving the secondary voltage by 5v; the smelting process is controlled according to the smelting rhythms of the front, middle and later stages, and the important point is that the power factor is 0.85-0.8-0.75, and the three-phase current is controlled to keep balance.
The slag temperature after smelting is measured, the average slag temperature is about 1604 ℃, the silicon dioxide in the slag is about 30.9%, the silicon content in the alloy is between 3.38% and 3.65%, and the carbon content in the alloy is between 6.65% and 7.07%.
Pouring the alloy, wherein each layer is controlled within 60mm, pouring water is started within 20 minutes after pouring until the surface temperature of the alloy is about 120-225 ℃, and coarse breaking is started by using a tamping car.
The primary coarse breaking grain size is controlled within 400mm, and the alloy after coarse breaking is dumped to a breaking line to be further broken by using breaker equipment.
Embodiment two:
the method is used for crushing high-carbon ferrochrome.
Five chromium ore raw materials are matched according to an economic batching model, the granularity of the chromium ore raw materials is controlled to be 5-50mm, the total matching proportion of the chromium ore is controlled to be 65-68%, wherein the proportion of the Tibetan ore in the total chromium ore is 18.3%, and the proportion of the chromium ore raw materials is 66.7%; silica 5.4%, coke 14.4%, serpentine 5.3%, semi-coke 1.6% and slag 6.7%; uniformly mixing the raw materials and then feeding the mixture into a furnace; reduction and melting composition of mineral species: fusible refractory+refractory.
Adding the obtained mixed material into an ore heating furnace, and improving the secondary voltage by 5v; the smelting process is controlled according to the smelting rhythms of the front, middle and later stages, and the important point is that the power factor is 0.85-0.8-0.75, and the three-phase current is controlled to keep balance.
The slag temperature after smelting is measured, the average slag temperature is basically about 1602 ℃, the silicon dioxide in slag is about 31.06 percent, the silicon content in alloy is between 3.32 and 3.52 percent, and the carbon content in alloy is between 6.77 and 7.03 percent;
pouring the alloy, wherein each layer is controlled within 60mm, pouring water is started within 20 minutes after pouring until the surface temperature of the alloy is about 120-225 ℃, and coarse breaking is started by using a tamping car.
The primary coarse breaking grain size is controlled within 400mm, and the alloy after coarse breaking is dumped to a breaking line to be further broken by using breaker equipment.
Embodiment III:
the method is used for crushing high-carbon ferrochrome.
Five chromium ore raw materials are matched according to an economic batching model, the granularity of the chromium ore raw materials is controlled to be 5-50mm, the total matching proportion of the chromium ore is controlled to be 65-68%, wherein the proportion of the Tibetan ore in the total chromium ore is 15.0%, and the proportion of the chromium ore raw materials is 67.0%; silica 5.4%, coke 14.5%, serpentine 4.8%, semi-coke 1.6% and slag 6.7%; uniformly mixing the raw materials and then feeding the mixture into a furnace; reduction and melting composition of each mineral species: fusible refractory+refractory.
Adding the obtained mixture into an ore heating furnace, and improving the secondary voltage by about 5v; the smelting process is controlled according to the smelting rhythms of the front, middle and later stages, and the important point is that the power factor is 0.85-0.8-0.75, and the three-phase current is controlled to keep balance.
The slag temperature after smelting is measured, the average slag temperature is basically about 1602 ℃, the silicon dioxide in slag is about 30.09 percent, the silicon content in alloy is between 3.31 and 3.50 percent, and the carbon content in alloy is between 6.59 and 7.01 percent.
Pouring the alloy, wherein each layer is controlled within 60mm, pouring water is started within 20 minutes after pouring until the surface temperature of the alloy is about 120-225 ℃, and coarse breaking is started by using a tamping car.
The primary coarse breaking grain size is controlled within 400mm, and the alloy after coarse breaking is dumped to a breaking line to be further broken by using breaker equipment.

Claims (4)

1. A method for reducing the crushing difficulty of high-carbon ferrochrome is characterized by comprising the following steps: the method comprises the following steps:
s1, raw material adjustment:
the granularity of the raw materials of the high-carbon ferrochrome fed into the furnace is adjusted to 5mm-50mm, and refractory ore seeds are matched; when 100% of raw materials are mixed under the condition of no clinker, the proportion of refractory mineral ores in the material mixing process is less than or equal to 15%, the proportion of main stream ores is controlled to be 16% -18%, and the proportion of easily-melted refractory mineral seeds is controlled to be 65% -68%;
s2, rich slag matching:
the ratio of the rich slag is controlled at 7% +/-0.5%;
s3, smelting control:
after raw materials in the step S1 and the step S2 are matched and fed into a furnace, the secondary voltage is increased by 5V, and three-phase current is kept stable in the later period of smelting, so that the power factor in the earlier period of smelting, the power factor in the middle period of smelting and the change rhythm of the power factor in the later period of smelting are controlled to be 0.85-0.8-0.75;
s4, casting:
multi-layer casting is adopted in the casting process, the thickness of each casting is not more than 60mm, and water is repeatedly poured until the alloy temperature is reduced to 110-240 ℃ after the casting is condensed;
s5, alloy crushing:
early crushing is needed in the alloy cleaning process, and the primary coarse crushing granularity is less than or equal to 400mm.
2. The method for reducing the crushing difficulty of high-carbon ferrochrome according to claim 1, wherein the method comprises the following steps: the silicon content in the step S1 is 3.5+/-0.5%; the carbon content is 6.8% -7.5%.
3. The method for reducing the crushing difficulty of the high-carbon ferrochrome according to claim 2, wherein the method comprises the following steps of: in the step S3, the slag temperature is controlled at 1600+/-10 ℃ at the alloy tapping temperature, and the silicon dioxide in the slag is controlled at 30% -32%.
4. A method for reducing the crushing difficulty of high-carbon ferrochrome according to claim 3, wherein: in the step S4, water is poured in 20 minutes, the water pouring time cannot exceed 20 minutes each time, water pouring cannot be conducted in a concentrated mode, and the water pouring time is 10 minutes each time; after the pouring iron is poured, the temperature of the pouring iron is measured by a temperature measuring gun each time, and the pouring iron is stopped when the temperature reaches 110-240 ℃.
CN202211247381.4A 2022-10-12 2022-10-12 Method for reducing crushing difficulty of high-carbon ferrochrome Active CN115522083B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677749A (en) * 1969-10-15 1972-07-18 Battelle Development Corp Method of making high-density sintered chromium-bearing iron alloys
CN101962714A (en) * 2010-10-25 2011-02-02 中钢集团吉林铁合金股份有限公司 Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace
CN103695672A (en) * 2013-12-02 2014-04-02 吴正锡 Method for producing ferrochrome employing medium-frequency induction furnace
CN108977678A (en) * 2018-08-09 2018-12-11 徐州宏阳新材料科技有限公司 A kind of low-Ti high-C ferrochronium and its smelting process
CN111876592A (en) * 2020-08-06 2020-11-03 徐州宏阳新材料科技有限公司 Environment-friendly ferrochrome smelting furnace burden and preparation method thereof
CN112029995A (en) * 2020-08-09 2020-12-04 徐州宏阳新材料科技有限公司 Method for smelting ferrochrome by using ore-smelting furnace added with silica

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677749A (en) * 1969-10-15 1972-07-18 Battelle Development Corp Method of making high-density sintered chromium-bearing iron alloys
CN101962714A (en) * 2010-10-25 2011-02-02 中钢集团吉林铁合金股份有限公司 Production method of low-silicon low-titanium and high-carbon ferrochrome smelted by submerged arc furnace
CN103695672A (en) * 2013-12-02 2014-04-02 吴正锡 Method for producing ferrochrome employing medium-frequency induction furnace
CN108977678A (en) * 2018-08-09 2018-12-11 徐州宏阳新材料科技有限公司 A kind of low-Ti high-C ferrochronium and its smelting process
CN111876592A (en) * 2020-08-06 2020-11-03 徐州宏阳新材料科技有限公司 Environment-friendly ferrochrome smelting furnace burden and preparation method thereof
CN112029995A (en) * 2020-08-09 2020-12-04 徐州宏阳新材料科技有限公司 Method for smelting ferrochrome by using ore-smelting furnace added with silica

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
炉料级铬铁的生产;薛成武;张继范;;铁合金(01);第14-17页 *

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