CN1332263A - Whole coal powder wet duriron smelting techonlogy - Google Patents
Whole coal powder wet duriron smelting techonlogy Download PDFInfo
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- CN1332263A CN1332263A CN 01108563 CN01108563A CN1332263A CN 1332263 A CN1332263 A CN 1332263A CN 01108563 CN01108563 CN 01108563 CN 01108563 A CN01108563 A CN 01108563A CN 1332263 A CN1332263 A CN 1332263A
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- smelting
- duriron
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- silica
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Abstract
By using powdered coal with ash content less than 12 % and volatile matter content less than 22 % as reductant and silica, ferruginous material, limestone or fluorite as raw material and through a metallurgical process the same as available one, duriron is smelted. The furnace burden is 100-500 mm higher than the mouth during the smelting. The smelting process incldues low carbon ratio compounding, wet material feeding and high burden level smelting. By means of solving the problems is using raw coal as reductant, the present invention has low smelting cost, and low aluminium content in product.
Description
The present invention relates to a kind of Metal smelting technology, particularly a kind of ferrosilicon smelting technology.
Adopt the reductive agent as ferrosilicon smelting such as crude coal instead metallurgical coke, bottle coal Jiao, blue charcoal, charcoal, at home and abroad widespread usage.Utilizing raw coal is low than other reductive agent costs as the advantage of reductive agent.But, in smelting process, but exist some new problems.For example: ventilation property is poor in the stove, and fire door hardens seriously; The raw coal scaling loss is serious, and utilization ratio is low, and influences working of a furnace trouble-free operation; Because the Al in the raw material
2O
3Composition is higher, and many and difficult eliminating of slag making easily caused furnace bottom rising in the smelting process, and furnace life shortens, and causes comprehensive cost to increase.
The objective of the invention is to: a kind of whole coal powder wet duriron smelting techonlogy is provided.It adopts low-carbon (LC) than batching, and wet feed is gone into stove, and high charge level is smelted.Solved the problem of utilizing raw coal to exist at present, and made single stove smelting cost and integrated smelting cost that reduction by a relatively large margin all be arranged as reductive agent.
Implementation of the present invention: press following technology smelting duriron:
A, select materials: choose the Powdered raw coal of ash≤12%, fugitive constituent≤22%, silica, ferrous material, and Wingdale or fluorite are as raw material;
B, batching: after the silica washing, press silica 100kg, theoretical, join and get furnace charge for every part with coal dust, Wingdale or the fluorite 2～6kg of carbon amount 97～98%, the ferrous material of theoretical consumption;
C, batch mixing: will join the furnace charge of getting and add the water stirring, and make coal dust, and obtain mixed furnace charge attached to silica surface;
D, go into stove: mixed furnace charge is gone into stove, keep the high plug for outlet 100～500mm of charge level;
E, smelting: the smelting technology that furnace charge is gone into behind the stove is identical with existing smelting technology.
In the above-mentioned whole coal powder wet duriron smelting techonlogy, among the described step a, the raw coal of choosing is ash≤10% preferably.
Compared with the prior art, the present invention adopts electing property of carbon ratio on the low side also to control aluminum content originally, go into stove with wet feed and reduce the burn out rate of raw coal and optimize ventilation property, operating with high charge level increases the reduction interface, improves the rate of recovery with Wingdale or fluorite as catalyzer.Solved and utilized raw coal easily to harden as the existing fire door of reductive agent at present, the raw coal utilization ratio is low, the problem that the working of a furnace is bad, and smelting cost is declined to a great extent.The present invention is simple and easy to do, is applied in the ferrosilicon smelting good permeability in the stove, charge level is loose not to lump, and flame distribution is even, and electrode is inserted dark down, the fire door temperature is low, and charge level evenly sinks, and deslagging is smooth and easy, iron notch is held successfully stifled well, the working of a furnace in service is good, and furnace life can reach more than 3 years, can reduce brickwork number of times and consumptive material, the quantity discharged of flue dust and dust is relative to be reduced, and production environment is obviously improved.The present invention can make power consumption reduce by 15～18%, and output improves 16～20%, and total cost reduces by 20～23%, and the aluminum content of finished product can reach and be no more than 0.5%, can guarantee to be lower than 1.8%.It is simple and easy to do to have technology, does not change existing smelting equipment, does not influence existing operating habit, good practical effect, the characteristics of remarkable in economical benefits.Can be widely used in the ferrosilicon smelting production.
Below in conjunction with embodiment the specific embodiment of the present invention is described in further detail.
Embodiment: whole coal powder wet duriron smelting techonlogy is pressed following technology smelting duriron:
A, select materials: choose the Powdered raw coal of ash≤10%, fugitive constituent≤22%, satisfy silica and ferrous material that existing smelting technology requires, and Wingdale or fluorite are as raw material;
B, batching: after the silica washing, press silica 100kg, theoretical, join and get furnace charge for every part with coal dust, Wingdale or the fluorite 3～5kg of carbon amount 97～98%, the ferrous material of theoretical consumption;
C, batch mixing: will join the furnace charge of getting and add the water stirring, and make coal dust, and obtain mixed furnace charge attached to silica surface;
D, go into stove: mixed furnace charge is gone into stove, keep the high plug for outlet 300～500mm of charge level;
E, smelting: the smelting technology that furnace charge is gone into behind the stove is identical with existing smelting technology.
Claims (2)
1, whole coal powder wet duriron smelting techonlogy is characterized in that: press following technology smelting duriron:
A, select materials: choose the Powdered raw coal of ash≤12%, fugitive constituent≤22%, silica, ferrous material, and Wingdale or fluorite are as raw material;
B, batching: after the silica washing, press silica 100kg, theoretical, join and get furnace charge for every part with coal dust, Wingdale or the fluorite 2～6kg of carbon amount 97～98%, the ferrous material of theoretical consumption;
C, batch mixing: will join the furnace charge of getting and add the water stirring, and make coal dust, and obtain mixed furnace charge attached to silica surface;
D, go into stove: mixed furnace charge is gone into stove, keep the high plug for outlet 100～500mm of charge level;
E, smelting: the smelting technology that furnace charge is gone into behind the stove is identical with existing smelting technology.
2, whole coal powder wet duriron smelting techonlogy according to claim 1 is characterized in that: among the described step a, and the original coal ash part of choosing≤10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108563 CN1122728C (en) | 2001-06-19 | 2001-06-19 | Whole coal powder wet duriron smelting techonlogy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108563 CN1122728C (en) | 2001-06-19 | 2001-06-19 | Whole coal powder wet duriron smelting techonlogy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1332263A true CN1332263A (en) | 2002-01-23 |
| CN1122728C CN1122728C (en) | 2003-10-01 |
Family
ID=4657367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01108563 Expired - Fee Related CN1122728C (en) | 2001-06-19 | 2001-06-19 | Whole coal powder wet duriron smelting techonlogy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1122728C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725563A (en) * | 2020-11-30 | 2021-04-30 | 西安宏信矿热炉有限公司 | Low-carbon ferrosilicon smelting method |
-
2001
- 2001-06-19 CN CN 01108563 patent/CN1122728C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112725563A (en) * | 2020-11-30 | 2021-04-30 | 西安宏信矿热炉有限公司 | Low-carbon ferrosilicon smelting method |
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| Publication number | Publication date |
|---|---|
| CN1122728C (en) | 2003-10-01 |
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