CN110280727A - Large size tumble furnace smelt FeV80 heat preserving method - Google Patents
Large size tumble furnace smelt FeV80 heat preserving method Download PDFInfo
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- CN110280727A CN110280727A CN201910716220.7A CN201910716220A CN110280727A CN 110280727 A CN110280727 A CN 110280727A CN 201910716220 A CN201910716220 A CN 201910716220A CN 110280727 A CN110280727 A CN 110280727A
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- fev80
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- 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
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- Mechanical Engineering (AREA)
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention belongs to vanadium iron technical field of smelting, the large size furnace of tumbling for specifically disclosing a kind of quality and efficiency that can be improved and smelt FeV80 smelts the heat preserving method of FeV80.The large size tumble furnace smelt FeV80 heat preserving method, after the FeV80 molten iron for smelting out being cast in the molding ingot mould that knots, heat-preserving cover plate is covered on ingot mould and keeps the temperature 8~20 hours, heat-preserving cover plate is removed after heat preservation, it carries out tearing furnace natural cooling open after 8~20 hours, slag iron separation is carried out after natural cooling 8~20 hours and obtains vanadium iron cake, then vanadium iron cake natural cooling is made to carry out water quenching after 1~6 hour, and the water quenching cooling of vanadium iron cake is to being crushed after 20~150 DEG C.The large size tumble furnace smelt FeV80 heat preserving method, FeV80 is kept the temperature by covering heat-preserving cover plate, and the degree for effectively controlling soaking time, tearing furnace time, natural cooling time and water quenching vanadium iron cake open, the crystallization of FeV80 can be effectively improved, and reduce its hardness, improve its brokenness, so that the production efficiency of FeV80 greatly improves.
Description
Technical field
The invention belongs to vanadium iron technical field of smelting, and in particular to a kind of large size furnace of tumbling smelts the heat preserving method of FeV80.
Background technique
Currently, using the large size of cake weight >=7t/ furnace tumble furnace smelt the trade mark be FeV80 vanadium iron when, due to the mono- furnace of FeV80
Cake weight is larger, and vanadium iron cake hardness is larger after the cooling water quenching of tapping, causes its brokenness poor, production efficiency is extremely low.To reduce
Vanadium iron cake hardness improves production efficiency, needs to be kept the temperature after FeV80 smelts tapping.It is protected naturally using ingot mould after tapping at present
Warm mode is handled, and heat insulation effect is poor, cause the crystallization of FeV80 compared with thin, hardness is larger, brokenness is poor, production efficiency compared with
It is low.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of large sizes of quality and efficiency that can be improved and smelt FeV80 to incline
Turn over the heat preserving method that furnace smelts FeV80.
The technical solution adopted by the present invention to solve the technical problems is: large-scale furnace of tumbling smelts the heat preserving method of FeV80,
After the FeV80 molten iron for smelting out being cast in the molding ingot mould that knots, heat-preserving cover plate cover on ingot mould and heat preservation 8~20 is small
When, heat-preserving cover plate is removed after heat preservation, is carried out tearing furnace natural cooling open after 8~20 hours, be carried out after natural cooling 8~20 hours
Slag iron separation obtains vanadium iron cake, then vanadium iron cake natural cooling is made to carry out water quenching after 1~6 hour, and vanadium iron cake water quenching cooling to 20~
It is crushed after 150 DEG C.
Further, being filled with thermal insulation material in the heat-preserving cover plate.
Further, the thermal insulation material with a thickness of 200~400mm.
Further, the thermal insulation material is aluminosilicate fibrous material.
The beneficial effects of the present invention are: the large size is tumbled, furnace smelts the heat preserving method of FeV80, by covering heat-preserving cover plate pair
FeV80 is kept the temperature, and is effectively controlled soaking time, torn the degree of furnace time, natural cooling time and water quenching vanadium iron cake open, can be with
It is effectively improved the crystallization of FeV80, and reduces its hardness, improve its brokenness, so that the production efficiency of FeV80 mentions significantly
It is high.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Large size furnace of tumbling smelts the heat preserving method of FeV80, and the FeV80 molten iron for smelting out is cast to the molding ingot mould that knots
In after, covered on ingot mould heat-preserving cover plate and keep the temperature 8~20 hours, heat-preserving cover plate is removed after heat preservation, 8~20 hours are laggard
Row tears furnace natural cooling open, and slag iron separation is carried out after natural cooling 8~20 hours and obtains vanadium iron cake, then makes vanadium iron cake natural cooling 1
Carry out water quenching after~6 hours, the water quenching cooling of vanadium iron cake is to being crushed after 20~150 DEG C.
Wherein, there are many knotting methods of ingot mould, it is preferred to use following methods knot:
1) it is knotted on the bottom of ingot mould and inner sidewall at least three times using stamp mass, forms one layer of flame retardant coating；The step
In, generally knotted using pneumatic pick or electric shocking rammer；Stamp mass is preferably magnesia；
2) after the completion of flame retardant coating knots, in flame retardant coating corresponding with molten iron region is enclosed on the bottom of ingot mould and its inner sidewall
One layer of antiseepage screed-coat is set on surface；Antiseepage screed-coat is generally configured by the modes such as spraying, brushing；Antiseepage screed-coat
Thickness be preferably 1~2mm；Antiseepage screed-coat is usually made of the lesser refractory material of partial size, is preferably made of magnesium chamotte；Magnesium
Chamotte refers to mixed powder made of fire clay and magnesia cooperation；
3) after antiseepage screed-coat is provided with, ingot mould is toasted using coal gas；First toasted 3~8 hours with moderate heat, then
It is toasted 10~18 hours with high fire, total baking time 14 hours or more, obtains molding ingot mould；Generate moderate heat gas flow be
100~150Nm3/ h, the gas flow for generating high fire is 200~300Nm3/h。
Using the cooling FeV80 of the molding ingot mould of above-mentioned knotting method, obtained vanadium iron shape is complete, bright and clean, apparent mass
Preferable improvement is obtained, and slag inclusion amount is few, slag inclusion rate can reduce by 30% or more, and cemented alloy layer thickness can reduce 3mm or more, production
Efficiency can be improved 20% or more.
Heat-preserving cover plate is mainly used for covering on ingot mould, and therewith naturally seal with to be packed into ingot mould in FeV80 molten iron into
Row heat preservation；Heat-preserving cover plate has heat insulating function can also be in heat-preserving cover plate generally using the lesser material production of the coefficient of heat conduction
The structure of filling thermal insulation material in shell；The thermal insulation material is preferably aluminosilicate fibrous material, the filling thickness of thermal insulation material
Preferably 200~400mm；The size of heat-preserving cover plate is determined according to ingot mould size, preferably the circle of 2.0~2.5m of diameter
Cover board.
Embodiment 1
Large size is tumbled after furnace smelts FeV80, the FeV80 molten iron for smelting out is cast in the molding ingot mould that knots,
The diameter of ingot mould is 2000mm, depth 2000mm, and ingot mould includes a diameter with the comparable heat-preserving cover plate of ingot mould diameter, every time
Heat-preserving cover plate directly covered after tapping to carrying out heat preservation in 8 hours on the ingot mould equipped with molten iron；Heat-preserving cover plate is removed after heat preservation,
It carries out tearing furnace natural cooling open after 10 hours, slag iron separation is carried out after natural cooling 20 hours and obtains vanadium iron cake, then make vanadium iron cake certainly
So carry out water quenching after cooling 2 hours, the water quenching cooling of vanadium iron cake is to being crushed after 50 DEG C.Through detecting, protected using this method
The FeV80 of temperature, obtained cake weight 7t crystallizes to have obtained preferable improvement, and hardness reduces 10Hb, and brokenness is preferable, and the broken time≤
2 hours, production efficiency improved 50%.
Embodiment 2
Large size is tumbled after furnace smelts FeV80, the FeV80 molten iron for smelting out is cast in the molding ingot mould that knots,
The diameter of ingot mould is 2000mm, depth 2000mm, and ingot mould includes a diameter with the comparable heat-preserving cover plate of ingot mould diameter, every time
Heat-preserving cover plate directly covered after tapping to carrying out heat preservation in 10 hours on the ingot mould equipped with molten iron；Insulation cover is removed after heat preservation
Plate carried out tearing furnace natural cooling open after 20 hours, and slag iron separation is carried out after natural cooling 14 hours and obtains vanadium iron cake, then makes vanadium iron cake
Carry out water quenching after natural cooling 3 hours, the water quenching cooling of vanadium iron cake is to being crushed after 100 DEG C.Through detecting, carried out using this method
The FeV80 of heat preservation, obtained cake weight 8t crystallizes to have obtained preferable improvement, and hardness reduces 12Hb, and brokenness is preferable, is crushed the time
≤ 2 hours, production efficiency improved 55%.
Claims (4)
1. large size is tumbled, furnace smelts the heat preserving method of FeV80, it is characterised in that: the FeV80 molten iron for smelting out is cast to knotting
After in molding ingot mould, heat-preserving cover plate is covered on ingot mould and keeps the temperature 8~20 hours, removes heat-preserving cover plate after heat preservation, 8~
It carries out tearing furnace natural cooling open after 20 hours, slag iron separation is carried out after natural cooling 8~20 hours and obtains vanadium iron cake, then makes vanadium iron cake
Carry out water quenching after natural cooling 1~6 hour, the water quenching cooling of vanadium iron cake is to being crushed after 20~150 DEG C.
2. large size as described in claim 1 is tumbled, furnace smelts the heat preserving method of FeV80, it is characterised in that: the heat-preserving cover plate
It is interior to be filled with thermal insulation material.
3. large size as claimed in claim 2 is tumbled, furnace smelts the heat preserving method of FeV80, it is characterised in that: the thermal insulation material
With a thickness of 200~400mm.
4. large size as claimed in claim 2 or claim 3 is tumbled, furnace smelts the heat preserving method of FeV80, it is characterised in that: the thermal insulating material
Material is aluminosilicate fibrous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716220.7A CN110280727B (en) | 2019-08-05 | 2019-08-05 | Heat preservation method for smelting FeV80 in large-scale tilting furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910716220.7A CN110280727B (en) | 2019-08-05 | 2019-08-05 | Heat preservation method for smelting FeV80 in large-scale tilting furnace |
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| CN110280727A true CN110280727A (en) | 2019-09-27 |
| CN110280727B CN110280727B (en) | 2021-08-20 |
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| CN201910716220.7A Active CN110280727B (en) | 2019-08-05 | 2019-08-05 | Heat preservation method for smelting FeV80 in large-scale tilting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197141A (en) * | 2020-02-21 | 2020-05-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693932A (en) * | 2009-10-19 | 2010-04-14 | 攀钢集团攀枝花钢钒有限公司 | Method for producing ferrovanadium |
| CN103757171A (en) * | 2014-01-15 | 2014-04-30 | 攀钢集团西昌钢钒有限公司 | High vanadium ferroalloy smelting method and ingot mould for smelting high vanadium ferroalloy |
| CN203956035U (en) * | 2014-07-24 | 2014-11-26 | 攀钢集团西昌钢钒有限公司 | The ingot mould of cast vanadium iron |
| CN105903915A (en) * | 2016-05-16 | 2016-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Knotting method of casting ingot mold in preparation process of vanadium-iron alloy |
| RU2605729C2 (en) * | 2015-05-12 | 2016-12-27 | Открытое акционерное общество "ЕВРАЗ Ванадий Тула" | Mould for reception of slag and metal |
| CN108080589A (en) * | 2017-12-14 | 2018-05-29 | 攀枝花市仁通钒业有限公司 | For the knotting method of vanadium iron ingot mould structure |
-
2019
- 2019-08-05 CN CN201910716220.7A patent/CN110280727B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693932A (en) * | 2009-10-19 | 2010-04-14 | 攀钢集团攀枝花钢钒有限公司 | Method for producing ferrovanadium |
| CN103757171A (en) * | 2014-01-15 | 2014-04-30 | 攀钢集团西昌钢钒有限公司 | High vanadium ferroalloy smelting method and ingot mould for smelting high vanadium ferroalloy |
| CN203956035U (en) * | 2014-07-24 | 2014-11-26 | 攀钢集团西昌钢钒有限公司 | The ingot mould of cast vanadium iron |
| RU2605729C2 (en) * | 2015-05-12 | 2016-12-27 | Открытое акционерное общество "ЕВРАЗ Ванадий Тула" | Mould for reception of slag and metal |
| CN105903915A (en) * | 2016-05-16 | 2016-08-31 | 攀钢集团攀枝花钢铁研究院有限公司 | Knotting method of casting ingot mold in preparation process of vanadium-iron alloy |
| CN108080589A (en) * | 2017-12-14 | 2018-05-29 | 攀枝花市仁通钒业有限公司 | For the knotting method of vanadium iron ingot mould structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111197141A (en) * | 2020-02-21 | 2020-05-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
| CN111197141B (en) * | 2020-02-21 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Control method for fine powder rate of FeV50 alloy |
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| CN110280727B (en) | 2021-08-20 |
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