CN1026501C - Directly alloying process in vanadium slag furnace - Google Patents
Directly alloying process in vanadium slag furnace Download PDFInfo
- Publication number
- CN1026501C CN1026501C CN91109726A CN91109726A CN1026501C CN 1026501 C CN1026501 C CN 1026501C CN 91109726 A CN91109726 A CN 91109726A CN 91109726 A CN91109726 A CN 91109726A CN 1026501 C CN1026501 C CN 1026501C
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- steel
- slag
- vanadium
- vanadium slag
- furnace
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- 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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- Treatment Of Steel In Its Molten State (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The present invention relates to a direct alloying process in a vanadium slag furnace, which belongs to the technical field of direct electric furnace alloying of oxides. The process is characterized in that original block-shaped vanadium slag, slag making materials in a reduction period, and deoxidizers are orderly added to a molten pool, alkalinity is reasonably controlled to be stable in the range of 2.5 to 3.2, and the recovery rate of vanadium is enhanced. In the process, the recovery rate of the vanadium is stabilized at 90 to 95%; compared with the direct alloying process outside a vanadium slag furnace, the recovery rate of the vanadium increased by 10%, and the cost of steel ingots in each ton of steel is reduced by 29 yuan. The direct alloying process in a vanadium slag furnace of the present invention is mainly used for smelting low-alloy steel containing vanadium.
Description
Directly alloying process in vanadium slag furnace of the present invention belongs to oxide compound directly into electric furnace alloying process field.
The ordinary method of smelting vanadium-containing steel is to add ferro-vanadium or special type contains the vanadium master alloy in molten steel.Developed into the outer DIRECT ALLOYING technology of vanadium slag stove afterwards.
In order to save the preparation technology of vanadium slag-reductive agent compound in the outer DIRECT ALLOYING technology of vanadium slag stove, reclaim all useful elements in the vanadium slag better, invented directly alloying process in vanadium slag furnace.
Major technique feature of the present invention is: former block vanadium slag and reduction period slag making materials, reductor are successively added the molten bath, concrete steps comprise: (1) is after electric furnace arrangement for producing steel is smelted the Ex-all oxidation sludge, insert aluminium 1.0～1.2kg/t steel to the molten steel deep immediately, and the Ca-Si alloy that adds 0.8～1.0kg/t steel carries out pre-deoxidation; (2) add thin slag charge 20～30kg/t steel in stove, it consists of lime: fluorite=(8～8.5): (1.5～2), after fully stirring, get steel sample analysis C, Mn, P, S and required element; (3) once add former block vanadium slag 10～20kg/t steel by calculating, lumpiness≤120mm fully stirs; (4) in the molten bath, add composite deoxidant silicon carbide in batches carry out diffusive deoxidation, the total consumption 5～8kg/t of reduction period silicon carbide steel, and the molten bath fully stirred, add lime and make reduction period basicity R=2.5～3.2; (5) when sample analysis result under the thin slag quote bleach with slag after, can carry out whole furnishing branch, temperature, prepare tapping; (6) final deoxygenation is inserted the aluminium amount and is looked steel grade in 0.5～0.8kg/t steel scope; (7) tapping process is emphasized that slag mixes and is dashed; Assurance has intensive deoxidization desulfuration effect; (8) last, 60～90 seconds kinds of ladle argon-blown, pressure 0.15～0.20Mpa.From inserting the aluminium pre-deoxidation to tapping, the furnace reduction time only needs 20～30 minutes.
Using directly alloying process in vanadium slag furnace of the present invention can make the rate of recovery of vanadium be stabilized in 90～95%.Advancing to engage aurification technology outward with the vanadium slag stove compares, the rate of recovery of vanadium exceeds more than 10%, beneficial elements such as the vanadium of remaining some amount, titanium, chromium in the vanadium slag gold iron iron also have physics iron, chemical iron etc. all to be added utilization fully, and have improved the quality of steel in addition.
Embodiment smelts the 23MnV steel in electric furnace.Pack into cold half steel piece and steel scrap adds up to 19.7%, send electricity, oxygen blast carbon elimination, inserts aluminium 21kg to the molten steel deep behind the Ex-all oxidation sludge, adds Ca-Si alloy 20kg and carries out pre-deoxidation; Add thin slag charge 530kg subsequently, it consists of lime 450kg, fluorite 80kg.After fully stirring, get steel sample analysis C, Mn, P, S and required element.By calculating the former vanadium slag piece 280kg that once adds lumpiness≤120mm, ferromanganese 400kg fully stirs.The all molten all backs of slag charge add lime 270kg residue adjustment, make basicity R remain on 2.5～3.2; Add silicon carbide 120kg altogether in batches, and the molten bath is fully stirred.Get sample analysis under the thin slag, final deoxygenation was inserted aluminium 10kg after slag bleached, and started at 25 minutes recovery times from giving when aluminium is inserted in deoxidation.Steel behind elder generation's slag during tapping, slag mixes and dashes, and ladle argon-blown handled for 62 seconds, and pressure is 0.18Mpa.Steel ingot check chemical ingredients is as follows: (%) C 0.24, and Si 0.28, and Mn 1.43, and V 0.103, and P 0.021, S0.024, and surplus is Fe.The judgement grade of steel is 23MnV.
Directly alloying process in vanadium slag furnace of the present invention is mainly used in the smelting vanadium-containing low steel.
Claims (1)
1, a kind of directly alloying process in vanadium slag furnace successively adds the molten bath with former block vanadium slag and reduction period slag making materials, reductor, it is characterized in that may further comprise the steps:
(1) after electric furnace arrangement for producing steel is smelted the Ex-all oxidation sludge, insert aluminium 1.0～1.2kg/t steel to the molten steel deep immediately, and the Ca-Si alloy that adds 0.8～1.0kg/t steel carries out pre-deoxidation;
(2) add thin slag charge 20～30kg/t steel in stove, it consists of lime: fluorite=(8～8.5): (1.5～2), after fully stirring, get steel sample analysis C, Mn, P, S and required element;
(3) by calculating the former block vanadium slag 10～20kg/t steel of disposable adding, lumpiness≤120mm fully stirs;
(4) in the molten bath, add composite deoxidant silicon carbide in batches carry out diffusive deoxidation, the total consumption 5～8kg/t of reduction period silicon carbide steel, and the molten bath fully stirred, add lime and make reduction period basicity R=2.5～3.2;
(5) when sample analysis result under the thin slag quote bleach with slag after, can carry out whole furnishing branch, temperature, prepare tapping;
(6) final deoxygenation is inserted the aluminium amount and is looked steel grade in 0.5～0.8kg/t steel scope;
(7) tapping process will be emphasized that slag mixes and dashes;
(8) last, 60～90 seconds of ladle argon-blown, pressure 0.15～0.20Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109726A CN1026501C (en) | 1991-10-17 | 1991-10-17 | Directly alloying process in vanadium slag furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91109726A CN1026501C (en) | 1991-10-17 | 1991-10-17 | Directly alloying process in vanadium slag furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071708A CN1071708A (en) | 1993-05-05 |
| CN1026501C true CN1026501C (en) | 1994-11-09 |
Family
ID=4909949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91109726A Expired - Fee Related CN1026501C (en) | 1991-10-17 | 1991-10-17 | Directly alloying process in vanadium slag furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026501C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798618B (en) * | 2010-03-26 | 2012-03-21 | 河北钢铁股份有限公司承德分公司 | Method for performing vanadium increase and refining in vanadium alloying by utilizing vanadium slag |
| CN102443705A (en) * | 2012-01-04 | 2012-05-09 | 金川集团有限公司 | Composite deoxidizer for preparing metal powder by atomization method |
| CN102584042B (en) * | 2012-01-19 | 2014-01-15 | 攀枝花钢城集团有限公司 | Steel slag compound micro powder and preparation method thereof |
| CN102864271A (en) * | 2012-09-21 | 2013-01-09 | 承德建龙特殊钢有限公司 | Digestion process of vanadium extraction waste slag in semi-steel steelmaking converter |
| CN104611513B (en) * | 2015-02-03 | 2016-06-08 | 河北钢铁股份有限公司承德分公司 | The Application way of vanadium in a kind of slag |
| CN108677016B (en) * | 2018-05-18 | 2019-12-27 | 内蒙古科技大学 | Preparation method of metallurgical titanium slag and iron-titanium-vanadium alloy containing waste denitration catalyst |
| CN109576558B (en) * | 2018-11-16 | 2021-05-07 | 河北工程大学 | Method for recovering valuable components in vanadium slag |
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1991
- 1991-10-17 CN CN91109726A patent/CN1026501C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1071708A (en) | 1993-05-05 |
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