CN102051429B - Method for increasing medium-pressure carbonylation rate of sponge iron - Google Patents
Method for increasing medium-pressure carbonylation rate of sponge iron Download PDFInfo
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- CN102051429B CN102051429B CN201010572739A CN201010572739A CN102051429B CN 102051429 B CN102051429 B CN 102051429B CN 201010572739 A CN201010572739 A CN 201010572739A CN 201010572739 A CN201010572739 A CN 201010572739A CN 102051429 B CN102051429 B CN 102051429B
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- Prior art keywords
- sponge iron
- iron
- carbonylation rate
- coke
- sponge
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000006315 carbonylation Effects 0.000 title claims abstract description 23
- 238000005810 carbonylation reaction Methods 0.000 title claims abstract description 23
- 239000000571 coke Substances 0.000 claims abstract description 18
- 229920002472 Starch Polymers 0.000 claims abstract description 15
- 235000019698 starch Nutrition 0.000 claims abstract description 15
- 239000008107 starch Substances 0.000 claims abstract description 15
- 239000012141 concentrate Substances 0.000 claims description 8
- 238000005304 joining Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 229940087654 iron carbonyl Drugs 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
Abstract
The invention relates to a method for increasing the medium-pressure carbonylation rate of sponge iron. In the process of preparing sponge iron under medium pressure, raw material ore with a granularity being about 10 meshes to 50 meshes is adopted and starch of which the mass is 1% to 5% of that of the coke is added in the coke preparing process. Through the method provided by the invention, the acquired sponge iron with the porosity of 40% and the carbonylation rate of above 80% can be prepared, and the metal recovery rate is increased.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of technology for preparing sponge iron, be specifically related to a kind of method of pressing carbonylation rate in the sponge iron that improves.
Background technology
The sponge iron carbonylation process is a kind of of vapometallurgy technology; Sponge iron and reaction of carbon monoxide are obtained iron carbonyl; Then; The iron carbonyl thermolysis is obtained micron-sized carbonyl iron dust, and this carbonyl iron dust is mainly used in aspects such as powder metallurgy, electronics, microwave absorbing, and the iron carbonyl liquid of molten can also be as chemical catalyst.
The raw materials for production of sponge iron are that staple is the iron scale ore deposit or the iron ore concentrate of red stone, and iron scale ore deposit or iron ore concentrate are passed through fragmentation, sieved, join operations such as coking coal, reduction, fragmentation, obtain can be used in the granular sponge iron of producing iron carbonyl at last.
At present, the production technique of sponge iron mainly contains high-pressure process and middle compression technology both at home and abroad.In the high-pressure process, because the material selectivity of high-pressure process is good, the carbonylation rate of sponge iron can reach more than 90%.But in middle compression technology, the carbonylation rate of sponge iron has only about 30%, and technico-economical comparisones such as metal recovery rate are low, and production cost is big.
Summary of the invention
In order to overcome the problem that exists in the above-mentioned prior art, the purpose of this invention is to provide a kind of method of pressing carbonylation rate in the sponge iron that improves, when compression technology prepares sponge iron in the employing, can improve the carbonylation rate of sponge iron, improve metal recovery rate.
Be to realize that above-mentioned purpose, the technical scheme that the present invention adopted are, a kind of method of pressing carbonylation rate in the sponge iron that improves is equipped with in the process of sponge iron in middle compacting, and adopting granularity is 10 orders～50 purpose raw ores; Adding quality when joining coke is the starch of coke quality 1%～5%.
In the oxonation process, CO gas is preheating to 120 ℃～250 ℃.
Raw ore adopts iron phosphorus ore or iron ore concentrate.
Starch is industrial starch.
The inventive method is through the granularity of control raw ore; And add starch, feed the CO gas of preheating; Make porosity and reach 40% sponge iron, wherein the carbonylation rate under the press strip spare reaches more than 80%, has improved the technico-economical comparison under the compression technology in the sponge iron.
Embodiment
Below in conjunction with embodiment the present invention is elaborated.
For solve the sponge iron granularity closely knit, under middle press strip spare the low problem of carbonylation rate, the invention provides a kind of method of pressing carbonylation rate that improves in the sponge iron.At first, iron phosphorus ore or iron ore concentrate being broken into granularity is 10～50 purpose raw ores; When joining coke, in coke, adding quality is the industrial starch of coke quality 1～5%; In the oxonation process, CO gas is preheating to 120 ℃～250 ℃.
Adopt the inventive method to produce in the process of sponge iron, the granularity of control raw material iron scale ore deposit or iron ore concentrate is 10～50 orders, iron scale ore deposit or the cellular sponge iron blocks of iron ore concentrate sintered formation in reduction process like this, and it is long-pending to have increased reacted surface; Add industrial starch when joining coke; Behind starch, coke and the ore batch mixing; The small amount of oxygen that contains in the ore under the high temperature is reduced by coke, and industrial starch resolves into dioxide gas under 1150 ℃ of temperature, and this dioxide gas forms micro pores one by one in sponge iron; Increase the specific surface area of sponge iron; Form the sponge iron that porosity is about 40% high-specific surface area, increased the area of the reaction of sponge iron and CO gas, participate in the active increase of ferro element of reaction down and then promoted carbonylation rate and speed of reaction at middle press strip spare.In the carbonylation synthetic reaction process, the start-up temperature of sponge iron and CO gas is 120 ℃, if not preheating CO gas, cold material can not react, and therefore adopts the CO gas that is preheating to start-up temperature.Sponge iron and middle pressure carbon monoxide gas precursor reactant, owing to increased the specific surface area of sponge iron, sponge iron and carbon monoxide generation vigorous reaction generate iron carbonyl gas.
Embodiment 1
It is 10 purpose raw ores that the iron scale ore deposit is crushed to granularity; Adding quality when joining coke is the industrial starch of coke quality 1%, makes porosity and be 40% sponge iron.This sponge iron and carbon monoxide are carried out oxonation under 9Mpa pressure, process iron carbonyl, through detecting, the carbonylation rate of this sponge iron oxonation is 80%.
Embodiment 2
It is 25 purpose raw ores that iron ore concentrate is crushed to granularity; Adding quality when joining coke is the industrial starch of coke quality 3%, makes porosity and be 45% sponge iron.This sponge iron and carbon monoxide are carried out oxonation under 9Mpa pressure, process iron carbonyl, through detecting, the carbonylation rate of this sponge iron oxonation is 85%.
Embodiment 3
It is 50 purpose raw ores that the iron scale ore deposit is crushed to granularity; Adding quality when joining coke is the industrial starch of coke quality 5%, makes porosity and be 50% sponge iron.This sponge iron and carbon monoxide are carried out oxonation under 9Mpa pressure, process iron carbonyl, through detecting, the carbonylation rate of this sponge iron oxonation is 89%.
Claims (4)
1. one kind is improved the method for pressing carbonylation rate in the sponge iron, it is characterized in that, is equipped with in the process of sponge iron in middle compacting, and adopting granularity is 10 orders～50 purpose raw ores; Adding quality when joining coke is the starch of coke quality 1%～5%.
2. press the method for carbonylation rate in the raising sponge iron according to claim 1, it is characterized in that, in the oxonation process, CO gas is preheating to 120 ℃～250 ℃.
3. press the method for carbonylation rate in the raising sponge iron according to claim 1, it is characterized in that, raw ore adopts iron phosphorus ore or iron ore concentrate.
4. press the method for carbonylation rate in the raising sponge iron according to claim 1, it is characterized in that said starch is industrial starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572739A CN102051429B (en) | 2010-12-04 | 2010-12-04 | Method for increasing medium-pressure carbonylation rate of sponge iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010572739A CN102051429B (en) | 2010-12-04 | 2010-12-04 | Method for increasing medium-pressure carbonylation rate of sponge iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102051429A CN102051429A (en) | 2011-05-11 |
| CN102051429B true CN102051429B (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010572739A Active CN102051429B (en) | 2010-12-04 | 2010-12-04 | Method for increasing medium-pressure carbonylation rate of sponge iron |
Country Status (1)
| Country | Link |
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| CN (1) | CN102051429B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1434406A (en) * | 1973-09-10 | 1976-05-05 | Thyssen Great Britain Ltd | Iron oxide material for smelting |
| CN1249350A (en) * | 1998-09-28 | 2000-04-05 | 冶金工业部北京冶金设备研究院 | Technology for directly reducing iron with coal base in pot furnace |
| CN101275091A (en) * | 2007-03-27 | 2008-10-01 | 上海宝田新型建材有限公司 | Molded coal for smelting reduction iron-smelting process and manufacturing method thereof |
-
2010
- 2010-12-04 CN CN201010572739A patent/CN102051429B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1434406A (en) * | 1973-09-10 | 1976-05-05 | Thyssen Great Britain Ltd | Iron oxide material for smelting |
| CN1249350A (en) * | 1998-09-28 | 2000-04-05 | 冶金工业部北京冶金设备研究院 | Technology for directly reducing iron with coal base in pot furnace |
| CN101275091A (en) * | 2007-03-27 | 2008-10-01 | 上海宝田新型建材有限公司 | Molded coal for smelting reduction iron-smelting process and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN102051429A (en) | 2011-05-11 |
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Effective date of registration: 20240219 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737103 No. 98, Jinchuan Road, Jinchang, Gansu Patentee before: Jinchuan Group Co.,Ltd. Country or region before: China |
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