CN1228479A - Steel making process by using full pig iron with oxidizing agent in electric arc furnace - Google Patents
Steel making process by using full pig iron with oxidizing agent in electric arc furnace Download PDFInfo
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- CN1228479A CN1228479A CN98113459A CN98113459A CN1228479A CN 1228479 A CN1228479 A CN 1228479A CN 98113459 A CN98113459 A CN 98113459A CN 98113459 A CN98113459 A CN 98113459A CN 1228479 A CN1228479 A CN 1228479A
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- Prior art keywords
- pig iron
- iron
- steel
- oxidizing agent
- arc 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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Abstract
The invented steel-smelting method uses pig iron as main raw material, specially adopts the iron pellet as oxidizing agent, and adds other elements according to the requirements for smelting different steel variety to make steel production. The iron pellet and pig iron are fully mixed according to the weight ratio of 5-20 : 95-80, then fed into furnace. Its raw material source is sufficient, steel-smelting cost is low and quality is high.
Description
The present invention relates to field of metallurgy, is a kind of steel-smelting technology of electric arc furnace.
Traditional electric-arc furnace steelmaking is to be that main raw material is smelted with the steel scrap, and the source of raw material is restricted.93105508.3 number disclosing a kind of is that raw material replaces steel scrap with the pig iron, and adopt traditional oxygenant iron ore decarburization to make steel, make the raw material sources of steel-making no longer restricted, but facts have proved that there is following drawback in this method: 1. with lean ore do oxygenant then add-on big (accounting for pig iron consumption more than 30%), the quantity of slag is big, power consumption is big, decarbonization rate is slow; Tap to tap time is long.2. make oxygenant with rich ore, be subjected to resource limit, be difficult for applying.3. regardless of in lean ore, a large amount of directly adding of the rich ore stove, harmful element in the iron ore (as phosphorus, sulphur, copper etc.) can increase smelting cost, even influences the quality of steel.If do not use the ore that contains harmful element, then iron ore resource is restricted again.Under existing processing condition, be that raw material adds iron ore again and makes steel if electric arc furnace 100% adopts the pig iron, be non-remunerative then from the economic benefit angle, be unfavorable for applying from utilization of resources angle.
The objective of the invention is provides the full pig iron of a kind of electric arc furnace to join the method for making steel of novel oxygenant at the problems referred to above, adopt this method, can not only all use the pig iron to do raw material (not mixing steel scrap) steel-making, and relative No. 93105508.3 patent steel-making cost are low, quality good, has remarkable economic efficiency and social benefit.
The solution of the present invention is to be raw material with the pig iron, particularly is equipped with the iron ball nodulizing and makes oxygenant, and add other element according to the needs of smelting different steel grades and make steel.
The above-mentioned stove weight ratio of going into of joining oxygenant iron ball nodulizing and the pig iron is iron ball nodulizing: the pig iron=5-20: 95-80.
Oxygenant iron ball nodulizing is joined by above-mentioned institute and the pig iron is through the thorough mixing fed to boiler.
The present invention uses the iron ball nodulizing to make oxygenant, because its harmful element content is significantly less than iron ore, so help smelting operation, help reducing smelting cost, is particularly conducive to the quality of raising steel.And the Fe in the iron ball nodulizing
2O
3The content height, epigranular, good permeability, easily decomposition, it is quick to help reaction between carbon and oxygen, evenly carries out, and the molten oxygen phase is short, flushing and casting simplification, safer, reliable.Facts have proved: adopt that cost of the present invention is low, quality good, the metal recovery rate height has remarkable economic efficiency and social benefit.
The invention will be further described below in conjunction with embodiment:
Embodiment 1: at nominal capacity is refining soft steel 20MnSi in 5 tons the electric furnace, claims pig iron 7500kg, iron ball nodulizing 1463kg, and amount is joined ferrosilicon 65kg routinely, ferromanganese 170kg, the mixing equipment of packing into mixes, and compound is gone into stove steel-making.In the present invention, be that melting period and oxidation period are united two into one, shortened tap to tap time, make more convenient operation safer, come out of the stove about 3 hours 20 minutes tap to tap time, furnace output 7.55t/ hour again through reduction period; Become ingot rate 96.18%, iron and steel stock consumption: 1053kg/t, consumption of electrode: 6.5kg/t, the integrated smelting cost descends 15%.
Embodiment 2: at nominal capacity is to refine high-carbon alloy steel: Cr in 20 tons of electric furnaces
12By every stove pig iron 20000kg, iron ball nodulizing 1060kg Intake Quantity batching.
In order to protect furnace bottom and favourable slag making dephosphorization in advance, in steel 25kg ratio cushioning bedstone ash per ton.In that do not have under the situation of mixing equipment can be reinforced with the pig iron and iron ball nodulizing cross stratification, amount adds ferrochrome 5500kg routinely, smelt after the casting Cr
1224.54 tons on ingot.
Claims (3)
1. steel making process by using full pig iron with oxidizing agent in electric arc furnace is to be that raw material is joined oxygenant and added other element according to the needs of smelting different steel grades and make steel with the pig iron, and it is characterized in that: the iron ball nodulizing that oxygenant is employing is joined by institute.
2. steelmaking process according to claim 1 is characterized in that: join oxygenant iron ball nodulizing and the pig iron the stove weight ratio of going into be iron ball nodulizing: the pig iron=5-20: 95-80.
3. steelmaking process according to claim 1 and 2 is characterized in that: the pig iron and iron ball nodulizing reenter stove behind thorough mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113459A CN1228479A (en) | 1998-03-10 | 1998-03-10 | Steel making process by using full pig iron with oxidizing agent in electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113459A CN1228479A (en) | 1998-03-10 | 1998-03-10 | Steel making process by using full pig iron with oxidizing agent in electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1228479A true CN1228479A (en) | 1999-09-15 |
Family
ID=5223181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98113459A Pending CN1228479A (en) | 1998-03-10 | 1998-03-10 | Steel making process by using full pig iron with oxidizing agent in electric arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1228479A (en) |
-
1998
- 1998-03-10 CN CN98113459A patent/CN1228479A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |