CN101255482A - Method for directly melting iron with iron ore powder or iron ore by using converter - Google Patents
Method for directly melting iron with iron ore powder or iron ore by using converter Download PDFInfo
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- CN101255482A CN101255482A CNA2008100200159A CN200810020015A CN101255482A CN 101255482 A CN101255482 A CN 101255482A CN A2008100200159 A CNA2008100200159 A CN A2008100200159A CN 200810020015 A CN200810020015 A CN 200810020015A CN 101255482 A CN101255482 A CN 101255482A
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- iron ore
- gas
- converter
- steam
- oxygen
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Abstract
The invention relates to a method for preparing pig iron liquid by converter top-blowing steam or oxygen, side-blowing or bottom-blowing steam or oxygen or air or coal gas or acetylene gas or the mixture of coal powder gas and coal powder with iron ore powder or iron ore as the main material, limestone and coal powder as the auxiliary materials. The method comprises the following steps: adding iron ore powder or iron ore into a converter, then adding limestone and coal powder, top-blowing steam or oxygen to melting slag, side-blowing or bottom-blowing steam or oxygen or coal gas or air or acetylene gas or the mixture of coal powder gas and coal powder for 20 to 25 minutes, reducing to produce pig iron liquid with a temperature of over 1600 DEG C. The compositions in the converter are as follows: 100 parts by weight of iron ore powder or iron ore, 5 to 8 parts by weight of limestone and 20 to 25 parts by weight of coal powder. The steam is a steam with a temperature of over 374 DEG C. Compared with traditional pig iron liquid smelting method by sintering furnace and blast furnace, the invention has small investment and low consumption. By testing, the invention can save 100% to 150% of energy than the traditional pig iron liquid smelting method by sintering furnace and blast furnace.
Description
Technical field
The present invention relates to a kind of method of refining pig iron liquid.Be specifically related to a kind of method of utilizing the converter direct ironmaking with powdered iron ore or iron ore.Belong to metallurgical technology field.
Background technology
Before the present invention made, what tradition refining pig iron liquid adopted is sintering oven and blast furnace process: the agglomerate that is about to Wingdale and coke briquette added in the blast furnace, is smelted into the pig iron liquid more than 1600 ℃.The area of mill site that this method is built sintering oven and blast furnace is big, and foundation works is big, and amount of investment is big, electricity consumption and big with amount of coke, energy consumption height.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of invest little, energy consumption is low utilizes the method for converter direct ironmaking with powdered iron ore or iron ore.
The object of the present invention is achieved like this: a kind of method of utilizing the converter direct ironmaking with powdered iron ore or iron ore, it is characterized in that: it is to be major ingredient with powdered iron ore or iron ore, being equipped with Wingdale and coal dust is auxiliary material, adopt converter top-blow steam or oxygen, the gas of furnace side or furnace bottom steam blowing or oxygen or air or coal gas or acetylene gas and coal dust, powder mixture, make pig iron liquid, the processing step of this method is as follows: in converter, add powdered iron ore or iron ore earlier, add Wingdale and coal dust again, furnace roof steam blowing or oxygen slag, the gas of furnace side or furnace bottom steam blowing or oxygen or coal gas or air or acetylene gas and coal dust, powder mixture, blew 20-25 minute, temperature is increased to reduce more than 1600 ℃ makes pig iron liquid, and the weight part that feeds intake of each component is in the converter:
100 parts of powdered iron ore or iron ores
Wingdale 5-8 part
Coal dust 20-25 part,
Described steam is meant the steam more than 374 ℃.
The present invention without coke, but adopts powdered iron ore or iron ore to utilize converter directly to refine pig iron liquid without sintering oven and blast furnace, compares with smelting of cast iron by blast-furnace liquid method with the conventional sintering stove, and the present invention invests little, and energy consumption is low.After tested, the present invention can be than conventional sintering stove and the energy-conservation 100%-150% of smelting of cast iron by blast-furnace liquid method.
Embodiment
Embodiment 1:
In converter, add powdered iron ore earlier, add Wingdale and coal dust again, furnace roof steam blowing (more than 374 ℃) and oxygen slag, gas, the powder mixture of furnace side or furnace bottom steam blowing or oxygen or coal gas or air or acetylene gas and coal dust blew 25 minutes, temperature is increased to reduce more than 1600 ℃ makes pig iron liquid, the weight part that feeds intake of each component is in the converter: 100 parts of powdered iron ore, Wingdale 5-8 part, coal dust 20-25 part.
Embodiment 2:
In converter, add iron ore earlier, add Wingdale and coal dust again, furnace roof steam blowing (more than 1000 ℃) and oxygen slag, gas, the powder mixture of furnace side or furnace bottom steam blowing or oxygen or coal gas or air or acetylene gas and coal dust blew 20 minutes, temperature is increased to reduce more than 1600 ℃ makes pig iron liquid, the weight part that feeds intake of each component is in the converter: 100 parts of iron ores, Wingdale 5-8 part, coal dust 20-25 part.
The steam of above converter top-blow and oxygen, steam and oxygen can be by any proportioning settings.Use manyly as steam, then duration of blast is many, and the temperature of steam is wanted high (more than 1000 ℃), otherwise, the temperature of steam higher (more than 374 ℃) then.
Claims (1)
1, a kind of method of utilizing the converter direct ironmaking with powdered iron ore or iron ore, it is characterized in that: it is to be major ingredient with powdered iron ore or iron ore, being equipped with Wingdale and coal dust is auxiliary material, adopt converter top-blow steam or oxygen, furnace side or furnace bottom steam blowing or or the gas of oxygen air or coal gas or acetylene gas and coal dust, powder mixture, make pig iron liquid, the processing step of this method is as follows: in converter, add powdered iron ore or iron ore earlier, add Wingdale and coal dust again, furnace roof steam blowing or oxygen slag, the gas of furnace side or furnace bottom steam blowing or oxygen or coal gas or air or acetylene gas and coal dust, powder mixture, blew 20-25 minute, temperature is increased to reduce more than 1600 ℃ makes pig iron liquid, and the weight part that feeds intake of each component is in the converter:
100 parts of powdered iron ore or iron ores
Wingdale 5-8 part
Coal dust 20-25 part,
Described steam is meant the steam more than 374 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100200159A CN101255482A (en) | 2008-03-21 | 2008-03-21 | Method for directly melting iron with iron ore powder or iron ore by using converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100200159A CN101255482A (en) | 2008-03-21 | 2008-03-21 | Method for directly melting iron with iron ore powder or iron ore by using converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101255482A true CN101255482A (en) | 2008-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100200159A Pending CN101255482A (en) | 2008-03-21 | 2008-03-21 | Method for directly melting iron with iron ore powder or iron ore by using converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101255482A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824504A (en) * | 2010-03-10 | 2010-09-08 | 江阴市尚疯新能源技术开发有限公司 | Method for preparing carbon-iron alloy with hydrogen, steam and combustible through thermal circulation |
| CN101597664B (en) * | 2009-06-18 | 2011-01-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Oxygen top-blown converter steelmaking method |
| CN102121059A (en) * | 2011-01-26 | 2011-07-13 | 陈忠和 | Method for directly making iron and producing sulfuric acid by using pyrite |
-
2008
- 2008-03-21 CN CNA2008100200159A patent/CN101255482A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597664B (en) * | 2009-06-18 | 2011-01-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Oxygen top-blown converter steelmaking method |
| CN101824504A (en) * | 2010-03-10 | 2010-09-08 | 江阴市尚疯新能源技术开发有限公司 | Method for preparing carbon-iron alloy with hydrogen, steam and combustible through thermal circulation |
| CN101824504B (en) * | 2010-03-10 | 2012-12-12 | 江阴市尚疯新能源技术开发有限公司 | Method for preparing carbon-iron alloy with hydrogen, steam and combustible through thermal circulation |
| CN102121059A (en) * | 2011-01-26 | 2011-07-13 | 陈忠和 | Method for directly making iron and producing sulfuric acid by using pyrite |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080903 |