CN1861809A - Process of mfg. iron by hematite or aetite melting direct reduction - Google Patents
Process of mfg. iron by hematite or aetite melting direct reduction Download PDFInfo
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- CN1861809A CN1861809A CN 200610012795 CN200610012795A CN1861809A CN 1861809 A CN1861809 A CN 1861809A CN 200610012795 CN200610012795 CN 200610012795 CN 200610012795 A CN200610012795 A CN 200610012795A CN 1861809 A CN1861809 A CN 1861809A
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- iron
- iron ore
- fusion
- limonite
- terrine
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Abstract
A method can be used to make the hematite or limonite directly reduced to iron, it is suitable to calcine non-magnetic hematite or limonite and reduce to iron; this method can decrease the consumption of energy and has no pollution; this invention firstly is the porphyrization of iron ore, adoption of spiral concentrator to clean the ore by water, secondly conjunction of some coke powder which has low content of sulfur, catalysts Q and dolomite to make mixture, then dispersing and adding into water to stir homogeneously, thirdly making the adobe with air hole by machine, then loading the adobe into pottery jar sealed with anthracite, at last putting the jar on kiln car and pushing it into the kiln to calcine, when it is calcined to iron, it can take out after cooling.
Description
Technical field
The present invention relates to a kind of the method for system iron directly be reduced in rhombohedral iron ore or limonite fusion.
Background technology
In recent years, global iron and steel starting material fine iron breeze was relatively more nervous, especially China's shortage more.But simultaneously, there are a large amount of limonites or rhombohedral iron ore in the mine of each department, because limonite or rhombohedral iron ore do not have magnetic, can not magnetic separation, can only adopt low-grade iron ore through roasting pelletizing, blast furnace ironmaking, make steel step such as base again and repeat to smelt, energy consumption is big, and the cost height is seriously polluted.
Summary of the invention
The present invention seeks to overcome the deficiency of above-mentioned prior art, provide that a kind of energy consumption is low, free of contamination directly reduces the method for system iron with rhombohedral iron ore or limonite fusion.
The present invention makes iron with rhombohedral iron ore or limonite through the direct reduction of fusion roasting.The inventive method is:
(1) washing desliming: it is 10mm that iron ore is pulverized
3Following breeze adopts spiral concentrator that powdered iron ore is washed desliming;
(2) base: powdered iron ore is equipped with an amount of low-sulfur coke powder, unslaked lime, and Q type catalyzer, rhombspar mix makes compound, pulverizes and add water to stir, and is pressed into the base of band pore with blank machine; Compound according to the proportioning of weight percent is: powdered iron ore 70-80%, low-sulfur coke powder 5-10%, unslaked lime 3-8%, Q type catalyzer 1-5%, rhombspar 3-8%; 5-8% according to compound weight adds water;
(3) go into a jar oxygen barrier: the base of band pore is packed in the terrine, seal with hard coal; Terrine requires can anti-1500 degree high temperature;
(4) fusion roasting: terrine is put into the tunnel furnace that pushes the sealing insulation behind the kiln car carry out the fusion roasting, kiln temperature 1250-1350 degree, 3 hours time; Adopt the coke-oven gas heat supply for reductive agent; Way by Coal powder spray guarantees CO and H
2Concentration;
(5) kiln discharge is got iron: kiln car is released tunnel furnace, and the iron block with the terrine bottom after the cooling takes out.
The present invention is suitable for the rhombohedral iron ore of no magnetic phase or limonite directly are reduced into iron through the fusion roasting.The iron block of making can be directly used in steel-making.The inventive method can be avoided effectively owing to adopt iron ore of low ore grade directly to smelt problems such as the energy consumption that is caused is big, cost is high, seriously polluted.Simplified the complex process of existing iron and steel enterprise.
Embodiment
Limonite (the Fe that the present invention adopts Nanyang township, Xiaoyi City, Shanxi Province to produce
2O
3Content 46.8%), directly be reduced into iron according to the method described above.
After spiral concentrator washing desliming, the content of powdered iron ore can be brought up to about 52%.In the base step, compound according to the proportioning of weight percent is: powdered iron ore 76%, low-sulfur coke powder 10%, unslaked lime 5%, Q type catalyzer 4%, rhombspar 5%.Fixed carbon 85%, sulphur＜0.6% of the low-sulfur coke powder that adopts.
5% poach according to compound weight is pressed into base.In going into jar oxygen barrier step, the terrine that is adopted is uncovered drum shape, and 24 centimeters of diameters are high 47 centimeters.Through the iron block of making after the roasting, can be directly used in blast furnace steel-making or Electric furnace steel making fully through check.
Claims (3)
1, a kind of the method for system iron is directly reduced in rhombohedral iron ore or limonite fusion, it is characterized in that:
(1) washing desliming: it is 10mm that iron ore is pulverized
3Following breeze adopts spiral concentrator that powdered iron ore is washed desliming;
(2) base: powdered iron ore is equipped with an amount of low-sulfur coke powder, unslaked lime, and Q type catalyzer, rhombspar mix makes compound, pulverizes and add water to stir, and is pressed into the base of band pore with blank machine; Compound according to the proportioning of weight percent is: powdered iron ore 70-80%, low-sulfur coke powder 5-10%, unslaked lime 3-8%, Q type catalyzer 1-5%, rhombspar 3-8%; 5-8% according to compound weight adds water;
(3) go into a jar oxygen barrier: the base of band pore is packed in the terrine, seal with hard coal; Terrine requires can anti-1500 degree high temperature;
(4) fusion roasting: terrine is put into the tunnel furnace that pushes the sealing insulation behind the kiln car carry out the fusion roasting, kiln temperature 1250-1350 degree, 3 hours time;
(5) kiln discharge is got iron: kiln car is released tunnel furnace, and the iron block with the terrine bottom after the cooling takes out.
2, as claimed in claim 1 the method for system iron is directly reduced in rhombohedral iron ore or limonite fusion, it is characterized in that in the roasting, adopt the coke-oven gas heat supply for reductive agent.
3, as claimed in claim 1 or 2 the method for system iron is directly reduced in rhombohedral iron ore or limonite fusion, it is characterized in that in the roasting, the way by Coal powder spray guarantees CO and H
2Concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610012795 CN1861809A (en) | 2006-06-08 | 2006-06-08 | Process of mfg. iron by hematite or aetite melting direct reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610012795 CN1861809A (en) | 2006-06-08 | 2006-06-08 | Process of mfg. iron by hematite or aetite melting direct reduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1861809A true CN1861809A (en) | 2006-11-15 |
Family
ID=37389338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610012795 Pending CN1861809A (en) | 2006-06-08 | 2006-06-08 | Process of mfg. iron by hematite or aetite melting direct reduction |
Country Status (1)
| Country | Link |
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| CN (1) | CN1861809A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104152620A (en) * | 2014-08-28 | 2014-11-19 | 攀枝花市立宇矿业有限公司 | Method and equipment for iron ore powder direct reduction |
| CN104178593A (en) * | 2014-08-28 | 2014-12-03 | 攀枝花市立宇矿业有限公司 | Method and equipment for directly reducing iron ore powder |
| CN105087841A (en) * | 2014-05-13 | 2015-11-25 | 上海扬钢冶金技术有限公司 | Spontaneous combustion reduction method iron making process |
-
2006
- 2006-06-08 CN CN 200610012795 patent/CN1861809A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087841A (en) * | 2014-05-13 | 2015-11-25 | 上海扬钢冶金技术有限公司 | Spontaneous combustion reduction method iron making process |
| CN105087841B (en) * | 2014-05-13 | 2017-06-13 | 上海扬钢冶金技术有限公司 | Spontaneous combustion reducing process iron-smelting process |
| CN104152620A (en) * | 2014-08-28 | 2014-11-19 | 攀枝花市立宇矿业有限公司 | Method and equipment for iron ore powder direct reduction |
| CN104178593A (en) * | 2014-08-28 | 2014-12-03 | 攀枝花市立宇矿业有限公司 | Method and equipment for directly reducing iron ore powder |
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