CN1343793A - Slag decomposing agent for smelting steel - Google Patents
Slag decomposing agent for smelting steel Download PDFInfo
- Publication number
- CN1343793A CN1343793A CN00112564A CN00112564A CN1343793A CN 1343793 A CN1343793 A CN 1343793A CN 00112564 A CN00112564 A CN 00112564A CN 00112564 A CN00112564 A CN 00112564A CN 1343793 A CN1343793 A CN 1343793A
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- CN
- China
- Prior art keywords
- decomposing agent
- smelting steel
- slag
- slag decomposing
- steel
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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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- Manufacture And Refinement Of Metals (AREA)
Abstract
A slag decomposing agent for smelting steel is composed of powdered Mn ore, Mn-Si alloy, lime stone and coke through high-temp sinter and calcining in steam, and mainly contains Mn, SiO2, calcium oxide and iron oxide. It can replace iron scale and fluorite.
Description
The invention belongs to the technical field of smelting of steel.
Known to the applicant, in the production process of converter oxygen steelmaking, because blowing decarbonization rate in mid-term accelerates often to occur " returning dried " phenomenon.Return the metallurgical poor activity of dried slag, a little less than dephosphorization, the desulfidation, be unfavorable for the stability in the smelting process.In order to address this problem, traditional method is to add iron sheet or fluorite slag.Section can solve for the moment " returning dried " phenomenon in this way, but also brings adverse consequences: the one, be easy to generate " splash ", and increase iron and steel stock consumption, increase production cost; The 2nd, cause F ion rising in the flue gas, contaminate environment.
Purpose of the present invention: develop the manganese ore dissolving agent, substitute and to add iron sheet or fluorite slag, both solved " returning dried " difficult problem, improved the quality of steel again, reduce environmental pollution.
The present invention is achieved in that
1, a kind of slag decomposing agent for smelting steel, the composition of its composition (weight percent) is Mn30--40%, SiO
2≤ 35%, CaO≤5%, P≤0.25%, S≤0.5%, H
2O≤1%, surplus are ferric oxide.
2, a kind of production method of slag decomposing agent for smelting steel is characterized in that raw material by 55% (containing Mn24-30%) of (weight percent) manganese ore powder, and manganese-silicon 25%, Wingdale 10%, coke 10% are broken into earlier behind the φ 1mm powder mixed respectively; Put that high temperature sintering becomes work in-process in the tunnel kiln into; Smoulder and be finished product through the smoulder steam of kiln of steam again; Finished product is crushed to the granularity of φ 10-15mm, is the slag decomposing agent for smelting steel product.
Advantage of the present invention is: it is effective 1, to change slag, can increase silicon, dephosphorization, desulfurization, and 2, terminal point manganese adds, reduce alloy addition, reduce cost 3, replace fluorite to reduce environmental pollution, 4, improve terminal point and once pull into rate, minimizing is re-blow, 5, help improving lining life, 6, on probation through Ma Gangdi three steelworkss, horse steel Department of Science and Technology demonstration, effect is fine, has vast market prospect.
Below for a slag decomposing agent for smelting steel production method embodiment:
(1) batching: get 55% manganese ore powder (containing Mn28%), 25% manganese-silicon by weight, 10% Wingdale, 10% coke is broken into earlier φ 1mm powdery respectively;
(2) stir, with the manganese ore powder, manganese-silicon, Wingdale, coke drop into the stirrer of 7.5 kw of power in proportion, and each input amount is 1 ton, and through 20 minutes stirring, raw material was fully mixed;
(3) sintering: blended stock is placed in the tunnel furnace of 60m, drops in the kiln at every turn and measure 60 tons, through 900 ℃ of high temperature, 24 hours sintering become work in-process,
(4) secondary is smouldered: work in-process are put into the steam kiln of smouldering smoulder through 4 hours steams of 120 ℃, be cellular iron gray finished product.
(5) fragmentation: finished product is crushed to the granularity of φ 10-15mm, is the dissolving agent product.
Claims (2)
1, a kind of slag decomposing agent for smelting steel, the composition of its composition are (weight percent) Mn30-40%, SiO
2≤ 35%, CaO≤5%, P≤0.25%, S≤0.5%, H
2O≤1%, surplus are ferric oxide.
2, a kind of production method of slag decomposing agent for smelting steel, it is characterized in that raw material by 55% (containing Mn24-30%) of (weight percent) manganese ore powder, manganese-silicon 25%, Wingdale 10%, coke 1 0% mix after being broken into earlier φ 1mm powder respectively, put that high temperature sintering becomes work in-process in the tunnel kiln into, smoulder and become finished product through the smoulder steam of kiln of steam again; Finished product is crushed to the granularity of φ 10-15mm, is the slag decomposing agent for smelting steel product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112564A CN1343793A (en) | 2000-09-21 | 2000-09-21 | Slag decomposing agent for smelting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112564A CN1343793A (en) | 2000-09-21 | 2000-09-21 | Slag decomposing agent for smelting steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1343793A true CN1343793A (en) | 2002-04-10 |
Family
ID=4582417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00112564A Pending CN1343793A (en) | 2000-09-21 | 2000-09-21 | Slag decomposing agent for smelting steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1343793A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935741A (en) * | 2010-07-21 | 2011-01-05 | 申林 | Fluorine-free efficient compound scorification and slagging furnace burden |
| CN102041356A (en) * | 2010-07-21 | 2011-05-04 | 申林 | Fluorine-free high-efficiency compound slagging charging material and production method thereof |
| CN102417940A (en) * | 2011-08-30 | 2012-04-18 | 郑州东升冶金新材料有限公司 | Defoaming and slagging heat insulation agent for blast furnace ironmaking and preparation method thereof |
-
2000
- 2000-09-21 CN CN00112564A patent/CN1343793A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935741A (en) * | 2010-07-21 | 2011-01-05 | 申林 | Fluorine-free efficient compound scorification and slagging furnace burden |
| CN102041356A (en) * | 2010-07-21 | 2011-05-04 | 申林 | Fluorine-free high-efficiency compound slagging charging material and production method thereof |
| CN101935741B (en) * | 2010-07-21 | 2011-12-21 | 申林 | Fluorine-free efficient compound scorification and slagging furnace slag |
| CN102417940A (en) * | 2011-08-30 | 2012-04-18 | 郑州东升冶金新材料有限公司 | Defoaming and slagging heat insulation agent for blast furnace ironmaking and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |