CN104561532A - Mechanical ball pressing preparation technology of carbon-containing iron material for converter direct steelmaking - Google Patents
Mechanical ball pressing preparation technology of carbon-containing iron material for converter direct steelmaking Download PDFInfo
- Publication number
- CN104561532A CN104561532A CN201410788457.3A CN201410788457A CN104561532A CN 104561532 A CN104561532 A CN 104561532A CN 201410788457 A CN201410788457 A CN 201410788457A CN 104561532 A CN104561532 A CN 104561532A
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- CN
- China
- Prior art keywords
- carbon containing
- charge
- iron
- preparation technology
- converter
- Prior art date
- 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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
Abstract
The invention belongs to the field of metallurgical smelting and particularly relates to a mechanical ball pressing preparation technology of a carbon-containing iron material for converter direct steelmaking. The technology is characterized by comprising the following steps: (1) mixing a carbon-containing material and an iron-containing material and stirring; (2) uniformly feeding the stirred material between a pair of rollers, and forcibly pressing the pressed material into a main feed port by a spiral feeding device so that the pressing quantity of the spiral feeding machine is equal to the material quantity required by the main machine; (3) mechanically pressing into balls in a high-pressure mineral powder ball press; and (4) stacking and naturally drying. The content of iron oxide in the slag can be quickly adjusted by directly using the converter. Slagging in the early stage of converter smelting is effectively promoted so as to promote early dephosphorization reaction, reduce the phosphorus content in steel and improve the dephosphorization rate. The technology is conductive to early and thorough slagging and is an effective means for adjusting the active degree of slag in a converting process while the dephosphorization and desulfurization rate of the converter is effectively improved and the furnace lining is maintained.
Description
Technical field
The present invention relates to a kind of converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology, belong to metallurgical field of smelting.
Background technology
The starting material of converter steelmaking are divided into metal charge, nonmetal material and gas.Metal charge based on molten iron, steel scrap, iron alloy be auxiliary, nonmetal material comprises slag material, flux, refrigerant, and gas comprises oxygen, nitrogen, argon gas, carbonic acid gas etc.In production process, the ferrous material such as general iron ore, iron scale does slag material, and while working the slag situation, its ferriferous oxide is reduced into Fe by carbon, increases output of steel, reduces steel technology.But this type of ferrous material is again the strong refrigerant of smelting process, its cooling performance is 3 times of steel scrap.When increasing the consumption of the ferrous material such as iron ore, iron scale, then needing a large amount of heats, for meeting thermally equilibrated demand, being forced to the consumption reducing steel scrap, converter steelmaking production declining.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of iron ore can direct-reduction, direct steelmaking converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology.
Converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology of the present invention, is characterized in that following steps:
(1) carbon containing material and ferric charge mixed and stir;
(2) material after stirring evenly enters between pair roller, and spiral feeder will be forced the main opening for feed of press-in by laminate material, make the binder amount of feed screw equal with inventory needed for main frame;
(3) put high pressure breeze ball press into and carry out mechanical compaction balling-up;
(4) stack nature to dry.
In described step 1, the ratio of carbon containing material and ferric charge is that the mass percent of carbon containing material and ferric charge in step 1 is respectively carbon containing material 10 ~ 40%, ferric charge 60 ~ 90%.Mass percent all refers to the percentage ratio accounting for total mass.The pressure ball machinery adopted can be conventional ball press.
Described carbon containing material granularity is at below 0.3mm, and ferric charge is one or more in iron ore concentrate, powdered iron ore, iron scale, and wherein the granularity of iron ore concentrate is at below 0.074mm, and the granularity of powdered iron ore is at below 10mm, and the granularity of iron scale is below 10mm.
Described carbon containing material is coke powder, coal dust or hard coal.
Carbon containing material and ferric charge mixed in described step 1 and can add binding agent in whipping process, binding agent is the binding agent for ferric charge.
Described ferric charge grade TFe40% ~ 70%.
The invention has the beneficial effects as follows:
Converter directly uses and can adjust rapidly iron oxide content in slag.Effective promotion converter smelting change slag in earlier stage, and then promote dephosphorisation reaction in early stage, reduce phosphorus content in steel, improve dephosphorization rate.Be conducive to morningization slag, change slag, be the effective means of converting process adjustment slag active degree, effectively improve converter dephosphorization, desulfurization degree, safeguard furnace lining.Blow end point operation is identical with top and bottom combined blown converter normal in steel, and in oxygen and steel, carbon is close to thermodynamic(al)equilibrium, the recovery rate of raising metallurgical process iron.Solve the shortage of heat problem that process of bessemerizing causes owing to adding ore class ferrous material.Carbon containing iron charge machinery pressure ball uses ferric charge to add the balling-up of carbonaceous material mechanical compaction, can meet the component requirements of converter producing needs, can supplement balance heat again.
Embodiment
Converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology of the present invention, is following steps:
(1) carbon containing material and ferric charge mixed and stir;
(2) material after stirring evenly enters between pair roller, and spiral feeder will be forced the main opening for feed of press-in by laminate material, make the binder amount of feed screw equal with inventory needed for main frame;
(3) put high pressure breeze ball press into and carry out mechanical compaction balling-up;
(4) stack nature to dry.
In step 1, the mass percent of carbon containing material and ferric charge is respectively carbon containing material 10 ~ 40%, ferric charge 60-90%.Described carbon containing material granularity is at below 0.3mm, and ferric charge is iron ore concentrate, powdered iron ore, iron scale, and wherein the granularity of iron ore concentrate is at below 0.074mm, and the granularity of powdered iron ore is at below 10mm, and the granularity of iron scale is below 10mm.Carbon containing material is any in coke powder, coal dust or hard coal.Carbon containing material and ferric charge mixed in step 1 and can add binding agent in whipping process, binding agent is the binding agent for ferric charge.Ferric charge grade TFe40% ~ 70%, can be the normal grade of iron ore concentrate be TFe60 ~ 70%, also can be the iron ore of grade TFe < 60% and the mixture of grade TFe > 60% iron ore concentrate, also can be iron scale, the mixture of the industrial ferrous contained chip such as dust that steel-making ironmaking produces and iron ore concentrate.
Claims (6)
1. a converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology, is characterized in that following steps:
(1) carbon containing material and ferric charge mixed and stir;
(2) material after stirring evenly enters between pair roller, and spiral feeder will be forced the main opening for feed of press-in by laminate material, make the binder amount of feed screw equal with inventory needed for main frame;
(3) put high pressure breeze ball press into and carry out mechanical compaction balling-up;
(4) stack nature to dry.
2. converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology according to claim 1, is characterized in that: in step 1, the mass percent of carbon containing material and ferric charge is respectively carbon containing material 10 ~ 40%, ferric charge 60 ~ 90%.
3. converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology according to claim 1 and 2, it is characterized in that: carbon containing material granularity is at below 0.3mm, ferric charge is one or more in iron ore concentrate, powdered iron ore, iron scale, wherein the granularity of iron ore concentrate is at below 0.074mm, the granularity of powdered iron ore is at below 10mm, and the granularity of iron scale is below 10mm.
4. converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology according to claim 3, is characterized in that: carbon containing material is coke powder, coal dust or hard coal.
5. converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology according to claim 1, is characterized in that: carbon containing material and ferric charge mixed in step 1 and can add binding agent in whipping process, binding agent is the binding agent for ferric charge.
6. converter direct steelmaking carbon containing iron charge machinery pressure ball preparation technology according to claim 3, is characterized in that: ferric charge grade TFe40% ~ 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410788457.3A CN104561532A (en) | 2014-12-17 | 2014-12-17 | Mechanical ball pressing preparation technology of carbon-containing iron material for converter direct steelmaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410788457.3A CN104561532A (en) | 2014-12-17 | 2014-12-17 | Mechanical ball pressing preparation technology of carbon-containing iron material for converter direct steelmaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104561532A true CN104561532A (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410788457.3A Pending CN104561532A (en) | 2014-12-17 | 2014-12-17 | Mechanical ball pressing preparation technology of carbon-containing iron material for converter direct steelmaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104561532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317952A (en) * | 2021-12-10 | 2022-04-12 | 江苏沙钢集团有限公司 | Method for reprocessing and utilizing iron scale |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1561400A (en) * | 2001-08-02 | 2005-01-05 | 联邦科学及工业研究组织 | Iron ore briquetting |
| CN101680052A (en) * | 2007-05-28 | 2010-03-24 | 株式会社神户制钢所 | Method for production of carbon composite metal oxide briquette |
| CN101784683A (en) * | 2007-09-18 | 2010-07-21 | 株式会社神户制钢所 | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
| CN202786365U (en) * | 2012-08-03 | 2013-03-13 | 宁夏鹏程致远自动化技术有限公司 | System for automatic pressing and strength control of magnesium burden pellets |
| CN203546119U (en) * | 2013-10-09 | 2014-04-16 | 宝钢磁业（江苏）有限公司 | Material metering device for continuous pelletizing of manganese zinc ferrite |
-
2014
- 2014-12-17 CN CN201410788457.3A patent/CN104561532A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1561400A (en) * | 2001-08-02 | 2005-01-05 | 联邦科学及工业研究组织 | Iron ore briquetting |
| CN101680052A (en) * | 2007-05-28 | 2010-03-24 | 株式会社神户制钢所 | Method for production of carbon composite metal oxide briquette |
| CN101784683A (en) * | 2007-09-18 | 2010-07-21 | 株式会社神户制钢所 | Method for producing briquette with carbonaceous material incorporated therein by use of oil-containing iron-making plant dust |
| CN202786365U (en) * | 2012-08-03 | 2013-03-13 | 宁夏鹏程致远自动化技术有限公司 | System for automatic pressing and strength control of magnesium burden pellets |
| CN203546119U (en) * | 2013-10-09 | 2014-04-16 | 宝钢磁业（江苏）有限公司 | Material metering device for continuous pelletizing of manganese zinc ferrite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317952A (en) * | 2021-12-10 | 2022-04-12 | 江苏沙钢集团有限公司 | Method for reprocessing and utilizing iron scale |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |