CN109022658A - A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing - Google Patents
A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing Download PDFInfo
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- CN109022658A CN109022658A CN201810831990.1A CN201810831990A CN109022658A CN 109022658 A CN109022658 A CN 109022658A CN 201810831990 A CN201810831990 A CN 201810831990A CN 109022658 A CN109022658 A CN 109022658A
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- Prior art keywords
- iron ore
- powder
- ore powder
- reducing
- hismelt
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
Abstract
The invention discloses a kind of Iron Ore Powder mixings suitable for HISMELT melting and reducing, it is formed and weight percentage are as follows: Brazilian card powder: 25~35%, Brazilian coarse powder: and 5~15%, western australia powder: 15~25%, Sai Lali Mao Kuang: 15~25%, Jin Buba powder: 15~25%.Chemical index is as follows in the Iron Ore Powder mixing: TFe:61~62%, SiO2: 3.5~4.3%, Al2O3: 2.5~3.2%, S≤0.05%, P≤0.12%, partial size≤0.15mm Iron Ore Powder weight percent≤22%.Iron Ore Powder melting and reducing production blending ore used is specialized in the present invention provides a kind of, while reducing Iron Ore Powder cost of material, meet the production requirement of HISMELT smelting reduction process, improve feed grade and iron yield, the quantity of slag, ash quantity are reduced, has achieved the purpose that high production capacity, high metal recovery rate.
Description
Technical field
The invention belongs to iron-smelting raw materials to prepare and smelting reduction technology field, and in particular to a kind of molten suitable for HISMELT
Melt the Iron Ore Powder mixing of reduction.
Background technique
HISMELT smelting reduction process is one kind of short route ironmaking, which first carries out Iron Ore Powder fine grinding, drying,
It is then sprayed into reduction furnace and carries out reduction iron production, produce and meet necessarily required cast iron product.The production of HISMELT melting and reducing exists
There is certain advantage in raw material selection, COREX technique will be far below to the composition of fine ore, granularity requirements, COREX technique is wanted
Ask iron ore grade not less than 62%, granularity is within the scope of 6~30mm, and HISMELT technique requires grade to be not less than 60%, enters
Furnace granularity is not more than 3mm, and most Iron Ore Powder can substantially meet wanting for HISMELT technique after fine grinding in the market
It asks.
According to investigations, the lump ore raw material for being suitble to COREX technique in the market is the fine ore quantity for being suitble to HISMELT technique to require
10% or so, and price is also higher by 10~20% than the latter.Therefore, the selectivity of HISMELT technique is bigger, cost of material
It is lower, even if in this way, and not all fine ore be attained by HISMELT process efficient smelting target, the selection of fine ore is still
So can recovery rate to iron, smelt rhythm etc. and generate large effect.
Summary of the invention
Technical problem to be solved by the present invention lies in providing, a kind of Iron Ore Powder suitable for HISMELT melting and reducing is mixed
Material is suitble to HISMELT smelting reduction process high-temperature fusion, the smelting characteristic based on being reduced directly, reaches high production capacity, high metal
The production purpose of recovery rate.
In order to solve the above technical problems, the technical scheme is that
A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing, composition and weight percentage are as follows: Brazil's card
Powder: 25~35%, Brazilian coarse powder: 5~15%, western australia powder: 15~25%, Sai Lali Mao Kuang: 15~25%, Jin Bu
Ba Fen: 15~25%.
Further, composition control range in the Iron Ore Powder mixing suitable for HISMELT melting and reducing are as follows: TFe:61~
62%, SiO2: 3.5~4.3%, Al2O3: 2.5~3.2%, S≤0.05%, P≤0.12%, partial size≤0.15mm Iron Ore Powder
The number of weight hundred≤22%.
Again, the melting temperature of the Iron Ore Powder mixing suitable for HISMELT melting and reducing is 1280~1320 DEG C.
Preferably, the composition and weight percentage of the Iron Ore Powder mixing suitable for HISMELT melting and reducing are as follows: bar
Western card powder: 31.2%, Brazilian coarse powder: 9.6%, western australia powder: 21.1%, Sai Lali Mao Kuang: 19.4%, Jin Buba
Powder: 18.7%.
Preferably, the Iron Ore Powder mixing suitable for HISMELT melting and reducing includes (by weight percentage): TFe:
61.5%, SiO2: 3.9%, Al2O3: 2.98%, S:0.023%, P:0.073%, partial size≤0.15mm Iron Ore Powder weight hundred
Number: 20.3%.
Preferably (being more advantageous to reduces cost of material), the Iron Ore Powder mixing packet suitable for HISMELT melting and reducing
Containing (by weight percentage): TFe:61.0%, SiO2: 4.1%, Al2O3: 3.18%, S:0.024%, P:0.076%, partial size
The number of Iron Ore Powder weight hundred of≤0.15mm: 20.5%.
Preferably (it is more advantageous to and improves production efficiency), the Iron Ore Powder mixing packet suitable for HISMELT melting and reducing
Containing (by weight percentage): TFe:62.0%, SiO2: 3.82%, Al2O3: 2.62%, S:0.021%, P:0.076%, grain
The number of diameter≤0.15mm Iron Ore Powder weight hundred: 21.9%.
The chemical index of various iron ore raw materials such as table 1 (unit, weight percent) in heretofore described Iron Ore Powder mixing:
Table 1
In the present invention, HISMELT smelting reduction process is relatively lower than traditional blast furnace ironmaking to the quality requirement of Iron Ore Powder,
But HISMELT smelting reduction process has in the control of the harmful elements such as iron ore Powder Particle Size, iron content, melting temperature and silicon, aluminium
Its particular/special requirement, the present invention specifically carry out control as follows:
1) require granularity relatively fewer less than the ratio of 0.15mm, specific requirement controls within 22%, otherwise will cause
A large amount of fine grained mines are extracted out by dust pelletizing system, reduce the recovery rate of iron, also increase the pressure of dust pelletizing system.
2) iron-content is required 60% or more, but analytical calculation Jing Guo system and actual production test proof grade are 61
~62% is more advantageous to production, and grade is lower, and production efficiency is lower, and the rate of recovery of iron is lower, and grade produces when being more than 62%
Improved efficiency is unobvious, but cost of material can be increased significantly.
3) melting temperature control is between 1280~1320 DEG C, and when exceeding this range, fuel consumption can all be increased.
4) control of silicon, aluminium content: it is required that SiO2+Al2O3Not higher than 7.5%, sial too high levels can largely consume flux
And fuel, cause cost to increase.
The present invention meets the above-mentioned control to iron ore Powder Particle Size, iron content, melting temperature and harmful element in order to obtain
It is required that using 5 kinds of raw materials: Brazilian card powder, Brazilian coarse powder, western australia powder, Sai Lali Mao Kuang, Jin Buba powder are matched
It sets, configuration process mainly considers following aspect:
1) from the aspect of the granularity of iron ore and wear-resisting property two, the granularity of control Iron Ore Powder mixing (i.e. mixing powder) and
Dusting during fine grinding.In terms of granularity control, partial size≤0.15mm content is controlled in the western australia powder of selection
It is no more than 22% hereinafter, can effectively ensure that by the adjustment matched to it and mix powder diameter≤0.15mm ratio 10%；?
When controlling the powder phenomenon-tion during fine grinding, the lower western australia powder of hardness and the preferable Sierra Leone mine of viscosity are played
Extraordinary buffer function, to alleviate the excessive powder phenomenon-tion of iron ore during fine grinding.By above-mentioned control, the present invention
After Iron Ore Powder mixing fine grinding, partial size≤0.15mm Iron Ore Powder weight percent≤25%.
It 2) is as master by iron ore of the melting temperature between 1280~1320 DEG C in terms of iron ore melting temperature control
Raw material is wanted, in favor of increasing the also commercial weight of pre-reduction, reduces fuel consumption.
3) in terms of chemical analysis control, present invention employs integrated chemical element control methods to be debugged, and mixes
The main ingredient requirement of even powder: grade 61~62%, aluminium content 2.5~3.2%, silicone content 3.5~4.3%, the control to grade
System, which relies primarily on, adjusts the ratio of Brazilian card powder and Brazilian coarse powder to realize, passes through the ratio of Sierra Leone mine to the control of aluminium content
Example control is mutually adjusted by Jin Buba powder and Brazilian mine (including Brazilian card powder and Brazilian coarse powder) ratio to realize to silicone content
Control；The proportion of western australia powder is main to adjust powder diameter≤0.15mm ratio that mixes, but in view of its melting temperature
Spend it is lower, weight ratio control 15~25%.
The present invention is referred to by the research to HISMELT smelting reduction process and metallurgy principle in conjunction with the chemistry of various raw materials
The indexs such as mark, partial size, melting behaviour carry out ingredient structure optimization to the proportion of 5 kinds of raw materials, make to mix the partial size of powder, composition, melt
Melt temperature etc. to meet smelting requirements (for partial size≤0.15mm ratio within 22%, TFe is between 61~62%, SiO2+Al2O3
Content is within 7.5%, and melting temperature is between 1280~1320 DEG C), guaranteeing that grade is suitable, harmful element can be born, grain
While spending controllable, the balance of system has also been carried out to meltbility, ultimately form have excellent performance, low-cost mixed Iron Ore Powder it is mixed
Expect product.The indexs such as granularity, grade, harmful element, the melting temperature of Iron Ore Powder mixing of the present invention can satisfy HISMELT
The production requirement of melting and reducing.
The present invention obtains mixture recipes by accurately design, after the completion of being formulated design, is expected using intelligentized mixing
Process equipment carries out compounding, mixing production, obtains the Iron Ore Powder mixing of the present invention suitable for HISMELT melting and reducing.
Beneficial effects of the present invention:
The iron ore material of low price ensure that while reducing cost of material in the reasonable application market of the present invention
The production requirement of HISMELT smelting reduction process, improves the feed grade of HISMELT melting and reducing to 61% or more, the quantity of slag
0.45t/t is down to hereinafter, ash quantity is down to 20.5kg/t hereinafter, iron yield is improved to 96% or more, has reached high production capacity, Gao Jin
Belong to the purpose of recovery rate.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
Embodiment 1
The Iron Ore Powder mixing of the present embodiment forms and weight percentage is as shown in table 1, various iron ores in mixture recipes
Chemical index is as shown in table 2, and various iron ores are used intelligentized mixing material process equipment to carry out compounding, mixing production, obtains
Iron Ore Powder mixing.Each chemical element, compound, the chemical index of granularity are as shown in table 3 in Iron Ore Powder mixing obtained by the present embodiment.
The Iron Ore Powder mix product that the present embodiment is produced is applied in one enterprise of Shandong, is melted using HISMELT
Iron Ore Powder mixing is produced molten iron by reducing process, and production target is as shown in table 4, at the same with certain single Australia's mine (TFe:61.5%,
SiO2: 3.8%, Al2O3: 2.5%, the ratio of S:0.02%, P:0.011%, partial size less than 0.15mm is 31.5%, melts temperature
Degree 1245 DEG C) application after production target compared, specifically refer to table 4.
As shown in Table 4, it is compared by pilot production, uses mixing items of the powder than using single Australia's powder produced by the invention
Index is obviously improved.Simultaneously because having used relatively inexpensive Iron Ore Powder resource, the cost ratio that the present invention mixes powder is same
Therefore the market price low 5% or so of grade Australia powder also plays reduction cost of material and obviously acts on.
1 unit of table: weight percent, %
| Brazilian card powder | Brazilian coarse powder | Western australia powder | Sai Lali Mao Kuang | Jin Buba powder | |
| Embodiment 1 | 31.2 | 9.6 | 21.1 | 19.4 | 18.7 |
| Embodiment 2 | 24 | 11 | 22 | 22 | 21 |
| Embodiment 3 | 35 | 10 | 18 | 12 | 25 |
Table 2
Table 3
Table 4
Claims (10)
1. a kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing, composition and weight percentage are as follows: Brazilian card powder:
25~35%, Brazilian coarse powder: 5~15%, western australia powder: 15~25%, Sai Lali Mao Kuang: 15~25%, Jin Buba
Powder: 15~25%.
2. the Iron Ore Powder mixing according to claim 1 suitable for HISMELT melting and reducing, which is characterized in that described suitable
The composition and weight percentage of Iron Ore Powder mixing for HISMELT melting and reducing are as follows: Brazilian card powder: 31.2%, Brazil is thick
Powder: 9.6%, western australia powder: 21.1%, Sai Lali Mao Kuang: 19.4%, Jin Buba powder: 18.7%.
3. the Iron Ore Powder mixing according to claim 1 suitable for HISMELT melting and reducing, which is characterized in that described suitable
Iron Ore Powder mixing for HISMELT melting and reducing includes: TFe:61~62%, SiO2: 3.5~4.3%, Al2O3: 2.5~
3.2%, S≤0.05%, P≤0.12%, by weight percentage；Partial size≤0.15mm Iron Ore Powder weight percent≤
22%.
4. the Iron Ore Powder mixing according to claim 2 suitable for HISMELT melting and reducing, which is characterized in that described suitable
Iron Ore Powder mixing for HISMELT melting and reducing includes: TFe:61.5%, SiO2: 3.9%, Al2O3: 2.98%, S:
0.023%, P:0.073%, by weight percentage；Partial size≤0.15mm Iron Ore Powder weight percent: 20.3.
5. the Iron Ore Powder mixing according to claim 1-4 suitable for HISMELT melting and reducing, feature exist
In the melting temperature of the Iron Ore Powder mixing suitable for HISMELT melting and reducing is 1280~1320 DEG C.
6. the Iron Ore Powder mixing according to claim 1 or 2 suitable for HISMELT melting and reducing, which is characterized in that described
The chemical index of Brazilian card powder in Iron Ore Powder mixing are as follows: TFe:65~67%, SiO2≤ 2.2%, Al2O3≤ 2.0%, S≤
0.1%, P≤0.07%, by weight percentage；Brazilian card powder weight percent≤30% of partial size≤0.15mm.
7. the Iron Ore Powder mixing according to claim 1 or 2 suitable for HISMELT melting and reducing, which is characterized in that described
The chemical index of Brazilian coarse powder in Iron Ore Powder mixing are as follows: TFe:59~63%, SiO2≤ 9%, Al2O3≤ 2.5%, S≤0.1%,
P≤0.07%, by weight percentage；Brazilian coarse powder weight percent≤30% of partial size≤0.15mm.
8. the Iron Ore Powder mixing according to claim 1 or 2 suitable for HISMELT melting and reducing, which is characterized in that described
The chemical index of western australia powder in Iron Ore Powder mixing are as follows: TFe:56.5~58.5%, SiO2≤ 7.5%, Al2O3≤
3.5%, S≤0.1%, P≤0.07%, by weight percentage；The western australia partial size≤0.15mm powder weight percent
Number≤10%.
9. the Iron Ore Powder mixing according to claim 1 or 2 suitable for HISMELT melting and reducing, which is characterized in that described
The chemical index of Sai Lali Mao Kuang in Iron Ore Powder mixing are as follows: TFe:56~59.5%, SiO2≤ 3.5%, Al2O3≤ 7.5%, S≤
0.1%, P≤0.1%, by weight percentage；Partial size≤0.15mm Sai Lali eighteenth of the twenty mine weight percent≤25%.
10. the Iron Ore Powder mixing according to claim 1 or 2 suitable for HISMELT melting and reducing, which is characterized in that institute
State the chemical index of Jin Buba powder in Iron Ore Powder mixing are as follows: TFe:60~62.5%, SiO2≤ 5.0%, Al2O3≤ 3.5%, S≤
0.1%, P≤0.13%, by weight percentage；Partial size≤0.15mm Jin Buba powder weight percent≤40%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831990.1A CN109022658A (en) | 2018-07-26 | 2018-07-26 | A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810831990.1A CN109022658A (en) | 2018-07-26 | 2018-07-26 | A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing |
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| CN109022658A true CN109022658A (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810831990.1A Pending CN109022658A (en) | 2018-07-26 | 2018-07-26 | A kind of Iron Ore Powder mixing suitable for HISMELT melting and reducing |
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2018
- 2018-07-26 CN CN201810831990.1A patent/CN109022658A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 杨双平等: "《直接还原与熔融还原冶金技术》", 30 April 2013, 冶金工业出版社 * |
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Application publication date: 20181218 |