CN85101937A - brown coal ironmaking - Google Patents
brown coal ironmaking Download PDFInfo
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- CN85101937A CN85101937A CN 85101937 CN85101937A CN85101937A CN 85101937 A CN85101937 A CN 85101937A CN 85101937 CN85101937 CN 85101937 CN 85101937 A CN85101937 A CN 85101937A CN 85101937 A CN85101937 A CN 85101937A
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- Prior art keywords
- brown coal
- reduction
- iron
- iron ore
- gangue
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of direct reduction iron making technology after iron ore and the mixing of brown coal fragment, heats in equipment of direct reduction with pot process, obtains the high iron ore block of ferrous grade, separates gangue with mechanical means then, and lump ore must metallize.This method is simple, less investment, instant effect.
Description
The invention belongs to the smelting iron and steel technical field.
With direct method of reducing ironmaking is the problem that at present domestic and international steel industry is competitively studied.The domestic test that has unit once to carry out brown coal reduction of iron ore sphere of powder group, as ferry, Sichuan Province city iron and steel research institute with brown coal reduction v-ti magnetite concentrate pelletizing, Chemical Industry ﹠ Metallrygy Research Office of CAS with in add fine coal and develop metallized pellet.The also useful brown coal ironmaking of external as West Germany, but these direct method of reducing generally all will pass through ore grinding, make operations such as ball, drying, coal-grinding, and the equipment that needs is many, invests greatly.
The present invention also belongs to direct reduction iron making, but is not with powdered iron ore or pelletizing, but makes full use of the superior reducing property of brown coal, with brown coal direct-reduced iron lump ore, separates gangue then, obtains the nugget that metallizes.
Brown coal iron-smelting process flow process as shown in drawings
Main points of the present invention are after iron ore and brown coal fragment are mixed, to put in the reduction apparatus and heat, and when temperature rose to 700 ℃ of left and right sides, brown coal began reduction, and along with the rising of temperature, reduction rate is also accelerated.When temperature rises to 800 ℃～900 ℃, kept about two hours, the lump ore ferrous grade can improve greatly, and as the lump ore of Lufeng, Yunnan Steel Plant iron content 50% after treatment, ferrous grade brings up to 75%.
Above-mentioned reduction process is by CO and H
2Carry out, its chemical equation is as follows:
When temperature rises to 1000 ℃～1200 ℃, kept two hours, this moment, slag did not generate, iron crystal grain has been grown up and has been coupled to big grain, uses the method for mechanical means such as mechanical vibration, mechanical stitch then, and gangue is separated, obtain the nugget that metallizes, just can go into cupola furnace ironmaking, or go into Electric furnace steel making.For the pure iron ore deposit of iron content more than 65%, separate the operation of gangue and can save.
The present invention can be with the direct reducing and smelting of the coke oven of rotary kiln or not coking, but the easiest, effect is preferably with pot process directly reduction in tunnel furnace, but continuous production, and the lignite semi-coke that generates in the reduction process can be made formed coke or semicoke coal briquette, for civilian.
The inventive method is easy, than general reduction iron-smelting method save ore grinding, make ball, drying, coal-grinding or the like operation, can save the investment and the energy greatly than traditional ironmaking, reduce production costs, and can make full use of the lignite resource of China's abundant, economic benefit is very significant.
Claims (3)
1, a kind of processing method of direct reduction iron making utilizes brown coal to make reductive agent, it is characterized in that the directly reduction in reduction apparatus with iron ore and brown coal fragment, when temperature is raised to one regularly, with mechanical means gangue is separated, and obtains the iron ore block that metallizes.
2,, it is characterized in that with pot process in the tunnel by said equipment of direct reduction of claim 1 and method
Interior smelting, also available revolution
Smelt with shaft furnace.
3, by claim 1 and 2 said gangue condition and the methods of separating, it is characterized in that separating with mechanical means, optimum temps is 1100 ℃～1200 ℃, keeps 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101937 CN85101937A (en) | 1985-04-01 | 1985-04-01 | brown coal ironmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101937 CN85101937A (en) | 1985-04-01 | 1985-04-01 | brown coal ironmaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85101937A true CN85101937A (en) | 1986-01-10 |
Family
ID=4792148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85101937 Pending CN85101937A (en) | 1985-04-01 | 1985-04-01 | brown coal ironmaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85101937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747179A (en) * | 2012-07-03 | 2012-10-24 | 大连理工大学 | Method for preparing direct reduction iron by using lignite char as reducing agent |
-
1985
- 1985-04-01 CN CN 85101937 patent/CN85101937A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747179A (en) * | 2012-07-03 | 2012-10-24 | 大连理工大学 | Method for preparing direct reduction iron by using lignite char as reducing agent |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| RJ01 | Rejection of invention patent application after publication |