SU550429A1 - The method of smelting ferroalloys - Google Patents
The method of smelting ferroalloysInfo
- Publication number
- SU550429A1 SU550429A1 SU2188887A SU2188887A SU550429A1 SU 550429 A1 SU550429 A1 SU 550429A1 SU 2188887 A SU2188887 A SU 2188887A SU 2188887 A SU2188887 A SU 2188887A SU 550429 A1 SU550429 A1 SU 550429A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- slag
- melt
- foam
- furnace
- smelting
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 title description 2
- 238000003723 Smelting Methods 0.000 title description 2
- 239000002893 slag Substances 0.000 description 13
- 239000006260 foam Substances 0.000 description 8
- 239000000155 melt Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910001145 Ferrotungsten Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- ZXOKVTWPEIAYAB-UHFFFAOYSA-N dioxido(oxo)tungsten Chemical compound [O-][W]([O-])=O ZXOKVTWPEIAYAB-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
(54) СПОСОБ ВЫПЛАВКИ ФЕРРОСПЛАВОВ(54) METHOD OF MELTING FERROALLOY
После окончани довосстановлени в расплав ввод т вещества-пенообразователи (например , высшие окислы железа, марганца) с одновременной обработкой шлакового расплава газом или вводом в расплав веш,еств, выдел юш ,их газ при взаимодействии с расплавом, (например, углеродистых восстановителей). При этом на поверхности расплава вновь образуетс слой устойчивой пены. Во вновь образованной пене содержание невосстановленных окислов извлекаемых элементов в 10-100 раз ниже, чем их содержание в шлаке перед довосстановлением. С по влением пены печь переходит на спокойную токовую нагрузку. Электроды глубоко погружены в расплав, теплопотери уменьшаютс , шлак хорошо прогреваетс , что совместно с повышением в шлаке окислов железа и марганца способствует снижению в зкости шлака, улучшению условий осаждени капель металла. При этом происходит нагрев металла, что способствует в дальнейшем хорошему разделению со шлаком.After completion of the re-reduction, foaming agents are introduced into the melt (for example, higher oxides of iron, manganese) with simultaneous treatment of the slag melt with gas or the addition of matter, excretion, their gas during interaction with the melt (for example, carbonaceous reducing agents). In this case, a layer of stable foam is again formed on the surface of the melt. In the newly formed foam, the content of unrestored oxides of recoverable elements is 10-100 times lower than their content in the slag before re-recovery. With the appearance of foam, the furnace switches to a calm current load. The electrodes are deeply immersed in the melt, heat losses are reduced, the slag warms up well, which, together with the increase in iron and manganese oxides in the slag, reduces the viscosity of the slag and improves the conditions for precipitating metal droplets. When this occurs, the metal is heated, which further contributes to good separation from the slag.
В электродуговой печи мош;ностью 3,5 МВА проплавл ют шихту, состо шую из 8000 кг вольфрамового концентрата (70% вольфрамита и 30% шеелита) и 700 кг кокса.In an electric arc furnace of 3.5 MVA, a mixture of 8000 kg of tungsten concentrate (70% wolframite and 30% scheelite) and 700 kg of coke is smelted.
Плавка сопровождаетс интенсивным пенообразованием .Melting is accompanied by intense foaming.
После полного проплавлени шихты выделение газа прекращаетс и слой пены стабилизируетс . Плавка проходит в спокойном электрическом режиме, электроды на 20-100 мм погружены в шлак. Под слоем пенистого шлака металл хорошо прогрет до в зкости, необходимой дл вычерпывани стальными ложками . Перед началом довосстановлени на поверхность шлаковой пены ввод т ферросилиций фракций менее 0,4 мм в количестве 20 кг. В результате этого слой пены полностью разрушаетс и печь начинает работать на открытом дуговом режиме.After the charge is completely melted, the gas evolution ceases and the foam layer stabilizes. Melting takes place in a quiet electrical mode, the electrodes 20-100 mm immersed in the slag. Under the layer of foamy slag, the metal is well heated to the viscosity necessary for scooping with steel spoons. Before commencement of re-recovery, ferrosilicon fractions of less than 0.4 mm are introduced into the slag foam in an amount of 20 kg. As a result, the foam layer is completely destroyed and the furnace starts operating in open arc mode.
После разрушени пены провод т довосстановление шлака гранулированным ферросилицием , который равномерно ввод т в расплав в течение 35 мин в количестве 650 кг. Затем в печь задают 300 кг РезОз и 90 кг кокса. В результате шлак вновь вспениваетс , электроды погружаютс на глубину 100-200 мм и устанавливаетс спокойный электрический режим. После выдержки в течение 15 мин из печи выпускают шлак.After the destruction of the foam, the slag is repaired with granulated ferrosilicon, which is uniformly introduced into the melt within 35 minutes in an amount of 650 kg. Then 300 kg of ResOZ and 90 kg of coke are set into the furnace. As a result, the slag re-foams, the electrodes are immersed to a depth of 100-200 mm and a quiet electrical mode is established. After aging for 15 minutes, slag is released from the furnace.
Дл сравнени проведена плавка из того жеFor comparison, melt from the same
количества шихтовых материалов такого жеquantities of batch materials of the same
состава, но после довосстановлени в расплавcomposition, but after re-melting
не вводили FesOs.did not enter FesOs.
Сравнительные характеристики шлаков, полученных указанными двум способами, приведены в таблице:Comparative characteristics of slags obtained by these two methods are shown in the table:
Таким образом, предлагаемый способ увеличивает степень восстановлени вольфрама при выплавке ферровольфрама на 0,2%, чтоThus, the proposed method increases the reduction rate of tungsten in the smelting of ferro-tungsten by 0.2%, which
дает возможность повысить извлечение вольфрама из концентрата и получить в услови х ЧЭМК экономию в сумме примерно 60 тыс. руб. в год.It makes it possible to increase the extraction of tungsten from concentrate and to obtain, under CHEMK conditions, a saving of about 60 thousand rubles. in year.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2188887A SU550429A1 (en) | 1975-11-12 | 1975-11-12 | The method of smelting ferroalloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU2188887A SU550429A1 (en) | 1975-11-12 | 1975-11-12 | The method of smelting ferroalloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU550429A1 true SU550429A1 (en) | 1977-03-15 |
Family
ID=20637093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU2188887A SU550429A1 (en) | 1975-11-12 | 1975-11-12 | The method of smelting ferroalloys |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU550429A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303233C (en) * | 2005-06-29 | 2007-03-07 | 阳云徕 | Iron-extraction process ferro-tungsten production using schellite, tungsten waste and iron ore as raw material |
-
1975
- 1975-11-12 SU SU2188887A patent/SU550429A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303233C (en) * | 2005-06-29 | 2007-03-07 | 阳云徕 | Iron-extraction process ferro-tungsten production using schellite, tungsten waste and iron ore as raw material |
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