CN1389580A - Pre-molten low-melting point composite calcium carbide desulfurizer and its prepn. - Google Patents
Pre-molten low-melting point composite calcium carbide desulfurizer and its prepn. Download PDFInfo
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- CN1389580A CN1389580A CN 02120745 CN02120745A CN1389580A CN 1389580 A CN1389580 A CN 1389580A CN 02120745 CN02120745 CN 02120745 CN 02120745 A CN02120745 A CN 02120745A CN 1389580 A CN1389580 A CN 1389580A
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- melting point
- calcium
- oxide
- desulfurizer
- point composite
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of premelt-type, low-melting point, calcium carbonate complex desulfurizing agent and its preparation method, which is prepared according to the below components and proportino (weight):calcium carbonate 5-70%, calcium oxide 20-90%, calcium fluoride 3-10% and catalyst 0-10%. In advance perform passivating treatment on calcium oxide, then mix all the components according to the required proporation, then smelt them in the high-temperature stove, then cool them, and by crashing, prepare the particle-shape or powder-shape desulfurizing agent. By the premelting treatment, the melting point of desulfurizing agent lowers to 1250-1400 centigrade, which obviously raise its desulfurizing rate in the molten iron (molten steel) and shortens the reactive time and production cycle.
Description
1, technical field
The present invention relates to a kind of sweetening agent that is used for molten iron (molten steel) industrial production and preparation method thereof, specifically a kind of pre-molten low-melting point composite desulfurizing agent and preparation method thereof.
2, background technology
Existing sweetening agent is generally the mechanically mixing material.Such as Chinese patent CN1327073-" a kind of iron melt desulfurizing agent ", this sweetening agent mainly contains CaO or CaCO
3, NaCl, BaCO
3, CaC
2And Na
2CO
3Its method be in iron bath by molten iron per ton add 8～12Kg sweetening agent and molten iron mix towards or when going out molten iron, dust to molten iron and can reach the desulfurization purpose by molten iron 3～5kg sweetening agent per ton.This sweetening agent can be sloughed the sulphur of making an appointment with half in the molten iron.Its major defect is an effective constituent wherein, and such as carbide of calcium, calcium oxide etc., fusing point higher (generally at 1900-2200 ℃) causes in the use active relatively poorly, and effectively the ratio of utilizing is low excessively, generally about 10%.The composition that does not fully react about 90% is then discharged with the waste residue form, and environment is caused serious pollution.Simultaneously,, make the reaction times of sweetening process prolong, reduced production efficiency to a certain extent because mechanically mixing material fusing point height is difficult for dissolving.On the other hand, contain more exhaust gas composition in the mechanically mixing material, such as NaCl, BaCO
3, Na
2CO
3, CaCl
2Deng, although these components have certain katalysis for desulfurization, in use discharge a large amount of obnoxious flavoures such as Cl
2, CO, CO
2Deng, severe contamination Working environment not only, and cause public hazards.
3, summary of the invention
The objective of the invention is to overcome the defective of above-mentioned existing mechanically mixing sweetening agent, a kind of novel low melting point pre-molten composite calcium carbide desulfurizer and preparation method thereof is provided.Under blast furnace and the existing operational condition of cupola furnace, increase substantially the solubility and the sweetening effectiveness of calcium oxide and carbide of calcium, and obviously reduce its consumption, reduce bed drain purge and exhausted air quantity, further optimize work situation, enhance productivity.
A kind of pre-molten low-melting point composite calcium carbide desulfurizer of the present invention, formulated according to following component and ratio (weight), carbide of calcium 5-70%, calcium oxide 20-90%, Calcium Fluoride (Fluorspan) 3-10%, catalyzer 0-10%.Described catalyst levels scope is preferably 3-10%.Described catalyzer is meant any or two or more being mixed in sodium oxide, potassium oxide, aluminum oxide, the barium oxide.
The preparation method of pre-molten low-melting point composite calcium carbide desulfurizer of the present invention is: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, fragmentation is passed through in melting in High Temperature Furnaces Heating Apparatus then, is prepared into particulate state or desulfurizer powder.
The present invention has following characteristics: (1), handle by fritting, and the sweetening agent fusing point is reduced to 1250--1400 ℃, has obviously improved its desulfurization degree in molten iron (molten steel), has shortened reaction times and production cycle; (2), reaching under the situation of same sweetening effectiveness, its amount ratio mechanically mixing material reduces more than 50%, waste residue and waste gas are effectively controlled; (3), this sweetening agent also plays the effect of certain auxiliary and fast reaction speed to desiliconization, the dephosphorization of molten iron (molten steel).
4, embodiment
Further specify the present invention below in conjunction with embodiment.
Embodiment one
(1), proportioning: carbide of calcium 6%, calcium oxide 85%, Calcium Fluoride (Fluorspan) 3%, sodium oxide 2%, potassium oxide 2%, aluminum oxide 2%.
(2), preparation: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, fragmentation is passed through in melting in High Temperature Furnaces Heating Apparatus then, is prepared into particulate state or desulfurizer powder.
Embodiment two
(1), proportioning: carbide of calcium 38%, calcium oxide 55%, Calcium Fluoride (Fluorspan) 3%, sodium oxide 4%.
(2), preparation: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, fragmentation is passed through in melting in High Temperature Furnaces Heating Apparatus then, is prepared into particulate state or desulfurizer powder.
Embodiment three
(1), proportioning: carbide of calcium 68%, calcium oxide 22%, Calcium Fluoride (Fluorspan) 10%.
(2), preparation: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, fragmentation is passed through in melting in High Temperature Furnaces Heating Apparatus then, is prepared into particulate state or desulfurizer powder.
Embodiment four
(1), proportioning: carbide of calcium 6%, calcium oxide 80%, Calcium Fluoride (Fluorspan) 6%, sodium oxide 2%, potassium oxide 2%, aluminum oxide 2%, barium oxide 2%.
(2), preparation: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, fragmentation is passed through in melting in High Temperature Furnaces Heating Apparatus then, is prepared into particulate state or desulfurizer powder.
Claims (5)
1, a kind of pre-molten low-melting point composite calcium carbide desulfurizer is characterized in that: formulated according to following component and ratio (weight), and carbide of calcium 5-70%, calcium oxide 20-90%, Calcium Fluoride (Fluorspan) 3-10%, catalyzer 0-10%.
2, pre-molten low-melting point composite calcium carbide desulfurizer according to claim 1 is characterized in that: described catalyst levels is 3-10%
3, pre-molten low-melting point composite calcium carbide desulfurizer according to claim 1 and 2 is characterized in that: described catalyzer is meant any or two or more being mixed in sodium oxide, potassium oxide, aluminum oxide, the barium oxide.
4, the preparation method of pre-molten low-melting point composite calcium carbide desulfurizer according to claim 1 and 2, it is characterized in that: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, melting in High Temperature Furnaces Heating Apparatus, pass through fragmentation then, be prepared into particulate state or desulfurizer powder.
5, the preparation method of pre-molten low-melting point composite calcium carbide desulfurizer according to claim 3, it is characterized in that: in advance calcium oxide is carried out Passivation Treatment, again with each component mixed on request, melting in High Temperature Furnaces Heating Apparatus, pass through fragmentation then, be prepared into particulate state or desulfurizer powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120745 CN1389580A (en) | 2002-05-31 | 2002-05-31 | Pre-molten low-melting point composite calcium carbide desulfurizer and its prepn. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120745 CN1389580A (en) | 2002-05-31 | 2002-05-31 | Pre-molten low-melting point composite calcium carbide desulfurizer and its prepn. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1389580A true CN1389580A (en) | 2003-01-08 |
Family
ID=4744797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02120745 Pending CN1389580A (en) | 2002-05-31 | 2002-05-31 | Pre-molten low-melting point composite calcium carbide desulfurizer and its prepn. |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532072B (en) * | 2009-04-14 | 2011-01-05 | 中冶实久建设有限公司 | A desulfurizing agent and method for preparing same |
| CN101649367B (en) * | 2009-09-10 | 2011-01-05 | 武汉钢铁(集团)公司 | Technology for mixed blowing and desulfuration of iron mixing vehicle |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
| CN103014217A (en) * | 2011-09-26 | 2013-04-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing agent and application thereof as well as molten iron krypton (KR) desulfurization method |
| CN107971037A (en) * | 2017-11-30 | 2018-05-01 | 宁夏宝塔化工中心实验室(有限公司) | A kind of new calcium carbide production technology catalyst |
| CN115029511A (en) * | 2022-07-19 | 2022-09-09 | 武钢集团昆明钢铁股份有限公司 | Calcium oxide-based desulfurizer for complex vanadium-titanium high-sulfur molten iron injection blowing and application thereof |
-
2002
- 2002-05-31 CN CN 02120745 patent/CN1389580A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532072B (en) * | 2009-04-14 | 2011-01-05 | 中冶实久建设有限公司 | A desulfurizing agent and method for preparing same |
| CN101649367B (en) * | 2009-09-10 | 2011-01-05 | 武汉钢铁(集团)公司 | Technology for mixed blowing and desulfuration of iron mixing vehicle |
| CN103014217A (en) * | 2011-09-26 | 2013-04-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing agent and application thereof as well as molten iron krypton (KR) desulfurization method |
| CN103014217B (en) * | 2011-09-26 | 2015-07-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing agent and application thereof as well as molten iron krypton (KR) desulfurization method |
| CN102787210A (en) * | 2012-06-28 | 2012-11-21 | 辽宁中汇环保科技有限公司 | Calcareous premelted composite deoxidation and desulfurization agent for low-cost steel-making and method for preparing same |
| CN107971037A (en) * | 2017-11-30 | 2018-05-01 | 宁夏宝塔化工中心实验室(有限公司) | A kind of new calcium carbide production technology catalyst |
| CN115029511A (en) * | 2022-07-19 | 2022-09-09 | 武钢集团昆明钢铁股份有限公司 | Calcium oxide-based desulfurizer for complex vanadium-titanium high-sulfur molten iron injection blowing and application thereof |
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