CN108118235A - A kind of method with silicon carbide smelting ferrosilicon - Google Patents
A kind of method with silicon carbide smelting ferrosilicon Download PDFInfo
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- CN108118235A CN108118235A CN201711121433.2A CN201711121433A CN108118235A CN 108118235 A CN108118235 A CN 108118235A CN 201711121433 A CN201711121433 A CN 201711121433A CN 108118235 A CN108118235 A CN 108118235A
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- iron
- ferrosilicon
- silicon
- carborundum
- smelting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Silicon Compounds (AREA)
Abstract
The present invention provides a kind of method with silicon carbide smelting ferrosilicon, is related to field of metallurgy.Ferrosilicon is smelted by carborundum and iron oxide to be made.
Description
Technical field
The present invention relates to field of metallurgy, and more particularly to a kind of method with silicon carbide smelting ferrosilicon.
Background technology
Ferrosilicon is widely used in steel industry, foundary industry, Pi Jiang hairs refining magnesium and other industrial productions.
Ferrosilicon is using coke, steel cuttings, silica as raw material, in electric arc furnaces made of smelting at present.One ton of ferrosilicon is produced, is needed
Consume 1.7~1.8 tons of silicas, 0.9 ton of coke, 0.2 ton of steel cuttings, 50 kilograms of electrodes, 8400~9000KWh electric energy.Also generate
A large amount of exhaust gas such as sulfur dioxide and silicon powder and dust.
Not only cost of investment is high for this technique, but also high energy consumption, pollution are big, operation bad environments.
Low energy consumption, low cost, pollution-free, production operation easily new smelting process are studied, there is significant environment and society
It can benefit.
The content of the invention
It is an object of the invention to provide a kind of methods with silicon carbide smelting ferrosilicon.
Another object of the present invention is to provide a kind of smelting process of ferrosilicon, to substitute when the side with coke smelting duriron
Method.
The present invention is solved its technical problem and is realized using following technical scheme.
The present invention provides a kind of method with silicon carbide smelting ferrosilicon, by carborundum and iron oxide at 800~2800 DEG C
At a temperature of smelt be made, with iron, metallic silicon or silica adjust ferrosilicon in silicone content.
The advantageous effect of the embodiment of the present invention is：
This ferrosilicon smelting method has many advantages, such as low cost, low energy consumption, scalp, pollution-free, operating environment is light.
Specific embodiment
It, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The method with silicon carbide smelting ferrosilicon of the embodiment of the present invention is specifically described below.
A kind of method with silicon carbide smelting ferrosilicon according to mass ratio is 1 by carborundum and iron oxide：After 0.1~5 mixing
It smelts and is made at a temperature of 800~2800 DEG C, the silicone content in ferrosilicon is adjusted with iron, metallic silicon or silica.
Preferably, the mass ratio of carborundum, silica and iron oxide is 1:(0.1~3)：(0.1~3).Further
It is preferred that the mass ratio of carborundum, silica and iron oxide is 1:(0.2~1)：(0.2~1).Still more preferably, it is carbonized
The mass ratio of silicon, silica and iron oxide is 1:(0.4~0.6)：(0.3~0.5).
The sic raw material of this ferrosilicon smelting can be obtained by following methods：From silicon carbide smelting factory；From carborundum
Broken or gristmill；The useless carborundum recycled in waste mortar is cut from photovoltaic silicon wafer；Carborundum crushes wet concentration and sinks what is recycled in pond
Carborundum sinks mud；The useless carborundum generated in single-crystal silicon carbide piece process；Silicon carbide ceramic product generate it is waste and old, scrap
Carborundum；The carborundum containing coke generated during silicon carbide smelting.It is appreciated that the selection of sic raw material is not limited only to this theory
Mode cited by bright book, as long as ensureing that main component is carborundum.
The raw iron oxide material of this ferrosilicon smelting can be obtained by following methods：Iron ore；Waste slag；Iron rust；Containing hydroxide
The useless mud of iron；The iron content that cleaning ironware generates is given up mud.It is appreciated that no matter using a kind of mode of any of the above prepare iron oxide original
Material, as long as ensureing that main component is iron-containing compound.
A kind of method with silicon carbide smelting ferrosilicon：
According to mass ratio it is 1 by carborundum and iron oxide：System is smelted at a temperature of 800~2800 DEG C after 0.1~5 mixing
, the silicone content in ferrosilicon is adjusted with iron, metallic silicon or silica.Mineral hot furnace may be employed, it is also possible to intermediate frequency furnace, high frequency
Stove, resistance furnace etc., as long as smelting temperature can be reached.
Main reaction：
3SiC+Fe2O3=3Si+2Fe+3CO；Theoretical power consumption 1011KWh/t (Fe2Si3)；
3SiC+2Fe2O3=3Si+4Fe+3CO2；Theoretical power consumption 622KWh/t (Fe4Si3)；
Silicon adjusts reaction：
2SiC+SiO2=3Si+2CO, theoretical power consumption 2766KWh/t (Si)；
SiO+SiC=2Si+CO, theoretical power consumption 313KWh/t (Si)
75 ferrosilicon (siliceous 75% ferrosilicon) smelt reaction：
9SiC+Fe2O3+3SiO2=12Si+2Fe+9CO, theoretical power consumption 1998KWh/t (75 ferrosilicon), actual power consumption 2000
~3000KWh/t (75 ferrosilicon)
With the key reaction of coke, silica and steel cuttings smelting duriron：
C+SiO2=Si+2CO, theoretical power consumption 6843KWh/t (Si).Actual power consumption about 8400~9000KWh/t (75 silicon
Iron)
75 ferrosilicon (siliceous 75% ferrosilicon) smelting process compares
To sum up, there is low cost, low energy consumption, scalp, pollution-free with the method for silicon carbide smelting ferrosilicon.This smelting
Smelting method is simple for process, of low cost and quality is preferable, has great promotional value in the market in ferrosilicon, meets national big at present
The circular economy that power is advocated has significant environmental benefit and social benefit.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
It is raw material to take 10t carborundum, 5 tons of quartz sands and 0.45 ton of iron oxide.Intermediate frequency furnace is added in after mixing, at 1600 DEG C
Smelt 2 it is small when, come out of the stove cooling after obtain 12 tons siliceous 75% of ferrosilicon, power consumption 2500KWh/t, intermediate frequency furnace continues to smelt.
Embodiment 2
It is raw material to take 10t carborundum and 14 tons of iron oxide.Intermediate frequency furnace is added in after mixing, when smelting 2 is small at 1800 DEG C, is gone out
Furnace cooling but obtains 16 tons siliceous 45% of ferrosilicon, power consumption 1500KWh/t afterwards, and intermediate frequency furnace continues to smelt.
Embodiment 3
It is raw material to take the useless carborundum of 10t crystal silicons cutting recycling, the useless SILICA FUME of 5t industrial silicon plants and 0.5t iron ore powders.It is mixed
Intermediate frequency furnace is added in after even, when smelting 5 is small at 1500 DEG C, 12 tons siliceous 80% of ferrosilicon, power consumption are obtained after cooling of coming out of the stove
2200KWh/t, intermediate frequency furnace continue to smelt.
Embodiment 4
12t carborundum gristmill wet concentration is taken to sink carborundum pond mud, the useless SILICA FUME of 5t ferrosilicon smeltings factory and the 0.5t iron in pond
Mineral powder is raw material.Ball is pressed into after mixing, intermediate frequency furnace is added portionwise, a charge door is done on intermediate frequency furnace top, and side-lower does a discharging
Mouthful.When smelting 10 is small at 1800 DEG C, discharges in charging, there are 12 tons siliceous 75% of ferrosilicon, power consumption 2200KWh/t.
Embodiment 5
The silicon carbide crucible that 10t scraps is taken, is broken into 1~3 centimetre of particle, the useless SILICA FUME and 0.5t of 5t industrial silicon plants
Iron ore powder is raw material.Intermediate frequency furnace is added in after mixing, at 1700 DEG C smelt 5 it is small when, come out of the stove cooling after obtain 12 tons it is siliceous
78% ferrosilicon, power consumption 2300KWh/t, intermediate frequency furnace continue to smelt.
Embodiment 6
The waste and old carborundum such as silicon carbide boat, the silicon carbide brick that 10t scraps are taken, are broken into 1~3 millimeter of particle；5t is waste and old
Silica crucible plate is broken into 1~3 millimeter of particle；0.5t iron ore powders are raw material.Intermediate frequency furnace is added in after mixing, at 1800 DEG C
It is lower smelt 5 it is small when, come out of the stove cooling after obtain 12 tons siliceous 75% of ferrosilicon, power consumption 2800KWh/t, intermediate frequency furnace continues to smelt.
Embodiment 7
The useless carborundum of 15t silicon carbide smeltings factory generation and the mixture of coke are taken, is broken into 1~3 centimetre of particle；7t
Waste and old silica crucible plate is broken into 1~3 centimetre of particle；0.5t iron ores are raw material.Electric arc furnaces is added in after mixing, 2200
When smelting 5 is small at DEG C, 12 tons siliceous 83% of ferrosilicon, power consumption 3000KWh/t are obtained after cooling of coming out of the stove, electric arc furnaces continues to smelt.
In conclusion the method with silicon carbide smelting ferrosilicon of the embodiment of the present invention is simple for process, low energy consumption, at low cost
It is honest and clean, there is great promotional value in the market in ferrosilicon, meet the national circular economy advocated energetically at present, there is significant environment
Benefit and social benefit.
Embodiments described above is part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, belongs to the scope of protection of the invention.
Claims (9)
1. a kind of ferrosilicon, which is characterized in that by carborundum and iron oxide according to mass ratio be 1：800 ~ 2800 after 0.1 ~ 5 mixing
It smelts and is made at a temperature of DEG C, the silicone content in ferrosilicon is adjusted with iron, metallic silicon or silica.
2. ferrosilicon according to claim 1, which is characterized in that the Silicon in Ferrosilicon content is 10 ~ 96%.
3. ferrosilicon according to claim 1, which is characterized in that the sic raw material can be industrial products, such as carbon
The carborundum of SiClx smeltery production, silicon carbide abrasive etc.；Can also be the byproduct or waste material of recycling, such as from photovoltaic silicon wafer
The siliceous useless carborundum recycled in waste mortar, the carborundum that carborundum milling assorting room generates are generated in cutting or polishing process
Heavy mud etc..
4. ferrosilicon according to claim 1, which is characterized in that the raw iron oxide material can be iron oxide or
The high-temperature heatings such as ferrous oxide, ferroso-ferric oxide, iron hydroxide, ferrosilite, ferrous metasilicate, iron aluminate could, mangaic acid iron can generate can
It is carbonized the iron containing compounds of Si reduction.
5. silica according to claim 1, which is characterized in that the silica material can be silica,
It can also be the silicon-containing compound that the high-temperature heatings such as silicic acid, sodium metasilicate, silicon monoxide, alumina silicate can be carbonized Si reduction.
6. iron according to claim 1, which is characterized in that the iron material can be iron or ferrimanganic, iron aluminium,
The iron-containing alloys such as iron nickel, iron calcium, iron silicon, ferrozirconium.
7. silicon according to claim 1, which is characterized in that the silicon raw material can be metallic silicon or non-crystalline silicon,
It can also be the siliceous alloys such as silicomanganese, sial, tantnickel, silico-calcium, ferrosilicon, silicon zirconium.
8. the method for silicon carbide smelting ferrosilicon according to claim 1, which is characterized in that smelting can be coreless induction furnace, in
Frequency stove or resistance furnace, electric arc furnaces, plasma heating furnace or other heating equipments only need that temperature 800 ~ 2800 can be increased to
DEG C.
9. smelting process according to claim 8, which is characterized in that smelting can be not added with any fluxing agent, can also add in
Calcium oxide, aluminium oxide, calcium carbonate, Strong oxdiative calcium, magnesia or other fluxing agents, additive.
Priority Applications (1)
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| CN201711121433.2A CN108118235A (en) | 2017-11-14 | 2017-11-14 | A kind of method with silicon carbide smelting ferrosilicon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517987A (en) * | 2019-01-16 | 2019-03-26 | 石嘴山市惠农区宏丰工贸有限公司 | Silicon carbide produces technique for applying of the waste material in ferrosilicon, silicomangan production |
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2017
- 2017-11-14 CN CN201711121433.2A patent/CN108118235A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109517987A (en) * | 2019-01-16 | 2019-03-26 | 石嘴山市惠农区宏丰工贸有限公司 | Silicon carbide produces technique for applying of the waste material in ferrosilicon, silicomangan production |
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Application publication date: 20180605 |