CN109112255A - A kind of desulfurizing agent containing molybdenum trioxide and preparation method thereof for smelting steel - Google Patents
A kind of desulfurizing agent containing molybdenum trioxide and preparation method thereof for smelting steel Download PDFInfo
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- CN109112255A CN109112255A CN201811026518.7A CN201811026518A CN109112255A CN 109112255 A CN109112255 A CN 109112255A CN 201811026518 A CN201811026518 A CN 201811026518A CN 109112255 A CN109112255 A CN 109112255A
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- calcium
- oxide
- desulfurizing agent
- molybdenum trioxide
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- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
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- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, it is grouped as by the group of following parts by weight: 2~3 parts of carbon dust, 10~15 parts of molybdenum trioxide, 10~15 parts of zinc oxide, 6~7 parts of calcium oxide, 7~9 parts of calcium aluminate, 3~5 parts of sodium carbonate, 12~17 parts of iron oxide, 30~40 parts of active lime, 1-4 parts of magnesia, 2~4 parts of polyhydroxy based additive, 3~5 parts of barium carbonate, 5~8 parts of sodium peroxide, 6~8 parts of silica, 5~6 parts of sodium perborate, 7~10 parts of aluminum oxide, 4~10 parts of calcium silicates, 2~8 parts of calcium nitrite, 1~2 part of di-iron trioxide, 8~15 parts of manganese dioxide, 5~6 parts of borax, said components are put into after being sufficiently mixed in reactor and are passivated, desulfurizing agent is made.The formula of the invention is reasonable, and preparation method is simple, and desulfurization effect is good, and desulfurization degree reaches 93% or more, efficiently avoids " hot-short " phenomenon, while improving the cutting ability of steel, improves the quality of steel.
Description
Technical field
The present invention relates to smelting steel technical fields, and in particular to a kind of desulfurizing agent containing molybdenum trioxide for smelting steel and its
Preparation method.
Background technique
Desulfurizing agent, which can absorb most sulfur dioxide in flue gas and be fixed in waste fuel, to be widely used in chemical plant, smelts
Factory.Sulphur will cause adverse effect to the performance of steel, and the too high levels of sulphur in steel can make the hot-working character of steel degenerate, cause steel
" hot-short " property.Sulphur exists in the form of iron sulfide in steel, and eutectiferous fusing point of iron and iron sulfide composition, iron sulfide melts
Point is lower.Although the iron of liquid and iron sulfide can be with infinitely dissolves, the solubility very little being dissolved in liquid, only 0.015%-
When 0.02%, molten steel in process of setting since segregation is so that low melting point iron-iron sulfide eutectic is distributed in grain boundaries, in heat plus
The eutectic of grain boundaries is melted during work, intercrystalline fracture when steel is pressurized, i.e. generation " hot-short " line style, such as the violent height in steel,
Can exist in the form of manganese sulfide, when oxygen-containing high in steel, " hot-short " is more serious.Sulphur generates bad shadow to the mechanical performance of steel
It rings, so that the plasticity of steel is deteriorated, the horizontal plastic property of steel is especially made to be deteriorated.In addition, sulphur can also make welding performance degenerate, sulfur bearing steel
Often there is hot cracking in welding in material, while sulphur can be oxidized to sulfur dioxide evolution in the welding process, make in weld seam
At stomata.
Unresolved above-mentioned technical problem, carries out desulfurization to molten steel during smelting steel, currently, the main path of desulfurization
There are two types of, one is slag desulfurization, another kind is gasificating desulfurization, desulfurizing agent can be generally added during desulfurization, but existing
Desulfurizing agent desulfurization effect it is generally bad, therefore, how preferably desulfurization during smelting steel avoids steel from occurring " hot-short " existing
As improving the overall performance of steel, becoming technical problem in the urgent need to address at present.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of desulfurizing agent containing molybdenum trioxide for smelting steel and its preparation
Sulphur in molten steel can be controlled in the preferred range, improve the overall performance of steel, avoid the occurrence of " hot-short " phenomenon by method.
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel of the present invention, is grouped as by the group of following parts by weight: carbon dust 2~
3 parts, 10~15 parts of molybdenum trioxide, 10~15 parts of zinc oxide, 6~7 parts of calcium oxide, 7~9 parts of calcium aluminate, 3~5 parts of sodium carbonate, oxygen
Change 12~17 parts of iron, 30~40 parts of active lime, 1-4 parts of magnesia, 2~4 parts of polyhydroxy based additive, 3~5 parts of barium carbonate, mistake
5~8 parts of sodium oxide molybdena, 6~8 parts of silica, 5~6 parts of sodium perborate, 7~10 parts of aluminum oxide, 4~10 parts of calcium silicates, Asia
Said components are put into reactor by 2~8 parts of calcium nitrate, 1~2 part of di-iron trioxide, 8~15 parts of manganese dioxide, 5~6 parts of borax
In be sufficiently mixed after be passivated, be made desulfurizing agent.
Preferably, a kind of desulfurizing agent containing molybdenum trioxide for smelting steel, is grouped as: carbon dust by the group of following parts by weight
2.5 parts, 12.5 parts of molybdenum trioxide, 12.5 parts of zinc oxide, 6.5 parts of calcium oxide, 8 parts of calcium aluminate, 4 parts of sodium carbonate, iron oxide 14.5
Part, 35 parts of active lime, 2.5 parts of magnesia, 3 parts of polyhydroxy based additive, 4 parts of barium carbonate, 6.5 parts of sodium peroxide, silica 7
Part, 5.5 parts of sodium perborate, 8.5 parts of aluminum oxide, 6 parts of calcium silicates, 5 parts of calcium nitrite, 1.5 parts of di-iron trioxide, titanium dioxide
12 parts of manganese, 5.5 parts of borax, said components are put into after being sufficiently mixed in reactor and are passivated, and desulfurizing agent is made.
Preferably, sodium carbonate, calcium nitrite, sodium perborate purity are greater than 99%.
Preferably, carbon dust, iron oxide, zinc oxide, calcium silicates, molybdenum trioxide, calcium oxide, calcium aluminate, manganese dioxide, boron
Sand, active lime are less than 130 mesh.
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, comprising the following steps:
1) by carbon dust, molybdenum trioxide, zinc oxide, calcium oxide, barium carbonate, sodium peroxide, sodium perborate, calcium silicates, oxidation
Calcium, di-iron trioxide are chosen in proportion, are put into reaction kettle and are heated to 800 DEG C~1000 DEG C, stir 30min~45min, make group
Divide and is sufficiently mixed；
2) 300 DEG C~500 DEG C are cooled to, calcium aluminate, sodium carbonate, iron oxide, active lime, magnesia, more is sequentially added
Hydroxyl additive, silica, aluminum oxide, calcium nitrite, manganese dioxide, borax are mixed 20~30min, are down to
Room temperature is prepared into graininess；
3) above-mentioned particle is passivated in treatment process, the concentration of passivating solution is 50g/L~70g/L, and desulfurizing agent is made.
Compared with prior art, the formula of the invention is reasonable, and preparation method is simple, and desulfurization effect is good, and desulfurization degree reaches 93%
More than, " hot-short " phenomenon is efficiently avoided, while improving the cutting ability of steel, improves the quality of steel.Present invention addition
Molybdenum trioxide is smelted, and the average recovery rate of molybdenum is effectively shortened the duration of heat 99% or more, and every ton steel cost reduces by 6 yuan,
Smelting steel cost is significantly reduced, the raising of Business Economic Benefit is conducive to.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Embodiment 1
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, it is composed of the following components: carbon dust 2kg, molybdenum trioxide 10kg,
It is zinc oxide 10kg, calcium oxide 6kg, calcium aluminate 7kg, sodium carbonate 3kg, iron oxide 12kg, active lime 30kg, magnesia 1kg, more
Hydroxyl additive 2kg, barium carbonate 3kg, sodium peroxide 5kg, silica 6, sodium perborate 5kg, aluminum oxide 7kg, silicic acid
Calcium 4kg, calcium nitrite 2kg, di-iron trioxide 1kg, manganese dioxide 8kg, borax 5kg, wherein sodium carbonate, crosses boron at calcium nitrite
Sour sodium purity is 99.1%, carbon dust, iron oxide, zinc oxide, calcium silicates, molybdenum trioxide, calcium oxide, calcium aluminate, manganese dioxide, boron
Said components are put into after being sufficiently mixed in reactor and are passivated less than 100 mesh by sand, active lime, and desulfurizing agent is made.
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, comprising the following steps:
1) by carbon dust, molybdenum trioxide, zinc oxide, calcium oxide, barium carbonate, sodium peroxide, sodium perborate, calcium silicates, three oxygen
Change two iron to choose in proportion, be put into reaction kettle and be heated to 800 DEG C DEG C, stirs 45min, be sufficiently mixed component；
2) 300 DEG C are cooled to, calcium aluminate, sodium carbonate, iron oxide, active lime, magnesia, polyhydroxy addition are sequentially added
Agent, silica, aluminum oxide, calcium nitrite, manganese dioxide, borax are mixed 30min, are down to room temperature, be prepared into
It is granular；
3) above-mentioned particle is passivated in treatment process, the concentration of passivating solution is 50g/L, and desulfurizing agent is made.
Embodiment 2
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, it is composed of the following components: carbon dust 2.5kg, molybdenum trioxide
12.5kg, zinc oxide 12.5kg, calcium oxide 6.5kg, calcium aluminate 8kg, sodium carbonate 4kg, iron oxide 14.5kg, active lime
35kg, magnesia 2.5kg, polyhydroxy based additive 3kg, barium carbonate 4kg, sodium peroxide 6.5kg, silica 7kg, sodium perborate
5.5kg, aluminum oxide 8.5kg, calcium silicates 6kg, calcium nitrite 5kg, di-iron trioxide 1.5kg, manganese dioxide 12kg, borax
5.5kg, wherein sodium carbonate, calcium nitrite, sodium perborate purity are 99.5%, carbon dust, iron oxide, zinc oxide, calcium silicates, three
Said components are put into reactor and fill less than 80 mesh by molybdenum oxide, calcium oxide, calcium aluminate, manganese dioxide, borax, active lime
It is passivated after dividing mixing, desulfurizing agent is made.
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, comprising the following steps:
1) by carbon dust, molybdenum trioxide, zinc oxide, calcium oxide, barium carbonate, sodium peroxide, sodium perborate, calcium silicates, three oxygen
Change two iron to choose in proportion, be put into reaction kettle and be heated to 900 DEG C, stirs 40min, be sufficiently mixed component；
2) 400 DEG C are cooled to, calcium aluminate, sodium carbonate, iron oxide, active lime, magnesia, polyhydroxy addition are sequentially added
Agent, silica, aluminum oxide, calcium nitrite, manganese dioxide, borax are mixed 25min, are down to room temperature, be prepared into
It is granular；
3) above-mentioned particle is passivated in treatment process, the concentration of passivating solution is 60g/L, and desulfurizing agent is made.
Embodiment 3
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel is grouped as by the group of following weight kg: carbon dust 3kg, three oxygen
Change molybdenum 15kg, zinc oxide 15kg, calcium oxide 7kg, calcium aluminate 9kg, sodium carbonate 5kg, iron oxide 17kg, active lime 40kg, oxygen
Change magnesium 4kg, polyhydroxy based additive 4kg, barium carbonate 5kg, sodium peroxide 8kg silica 8kg, sodium perborate 6kg, three oxidations two
Aluminium 10kg, calcium silicates 10kg, calcium nitrite 8kg, di-iron trioxide 2kg, manganese dioxide 15kg, borax 6kg, wherein sodium carbonate,
Calcium nitrite, sodium perborate purity are 99.3%, carbon dust, iron oxide, zinc oxide, calcium silicates, molybdenum trioxide, calcium oxide, aluminic acid
Said components are put into after being sufficiently mixed in reactor and are passivated less than 120 mesh by calcium, manganese dioxide, borax, active lime,
Desulfurizing agent is made.
A kind of desulfurizing agent containing molybdenum trioxide for smelting steel, comprising the following steps:
1) by carbon dust, molybdenum trioxide, zinc oxide, calcium oxide, barium carbonate, sodium peroxide, sodium perborate, calcium silicates, three oxygen
Change two iron to choose in proportion, be put into reaction kettle and be heated to 1000 DEG C, stirs 30min, be sufficiently mixed component；
2) 500 DEG C are cooled to, calcium aluminate, sodium carbonate, iron oxide, active lime, magnesia, polyhydroxy addition are sequentially added
Agent, silica, aluminum oxide, calcium nitrite, manganese dioxide, borax are mixed 30min, are down to room temperature, be prepared into
It is granular；
3) above-mentioned particle is passivated in treatment process, the concentration of passivating solution is 70g/L, and desulfurizing agent is made.
Claims (5)
1. a kind of desulfurizing agent containing molybdenum trioxide for smelting steel, which is characterized in that be grouped as by the group of following parts by weight: carbon dust
2~3 parts, 10~15 parts of molybdenum trioxide, 10~15 parts of zinc oxide, 6~7 parts of calcium oxide, 7~9 parts of calcium aluminate, sodium carbonate 3~5
Part, 12~17 parts of iron oxide, 30~40 parts of active lime, 1-4 parts of magnesia, 2~4 parts of polyhydroxy based additive, barium carbonate 3~5
Part, 5~8 parts of sodium peroxide, 6~8 parts of silica, 5~6 parts of sodium perborate, 7~10 parts of aluminum oxide, calcium silicates 4~10
Part, 2~8 parts of calcium nitrite, 1~2 part of di-iron trioxide, 8~15 parts of manganese dioxide, 5~6 parts of borax, said components are put into
It is passivated after being sufficiently mixed in reactor, desulfurizing agent is made.
2. a kind of desulfurizing agent containing molybdenum trioxide for smelting steel according to claim 1, which is characterized in that by following heavy
The group of amount part is grouped as: 2.5 parts of carbon dust, 12.5 parts of molybdenum trioxide, 12.5 parts of zinc oxide, 6.5 parts of calcium oxide, 8 parts of calcium aluminate, carbon
4 parts of sour sodium, 14.5 parts of iron oxide, 35 parts of active lime, 2.5 parts of magnesia, 3 parts of polyhydroxy based additive, 4 parts of barium carbonate, peroxide
Change 6.5 parts of sodium, 7 parts of silica, 5.5 parts of sodium perborate, 8.5 parts of aluminum oxide, 6 parts of calcium silicates, 5 parts of calcium nitrite, three
Aoxidize 1.5 parts of two iron, 12 parts of manganese dioxide, 5.5 parts of borax, said components are put into after being sufficiently mixed in reactor carry out it is blunt
Change, desulfurizing agent is made.
3. a kind of desulfurizing agent containing molybdenum trioxide for smelting steel according to claim 1 or 2, which is characterized in that carbonic acid
Sodium, calcium nitrite, sodium perborate purity are greater than 99%.
4. a kind of desulfurizing agent containing molybdenum trioxide for smelting steel according to claim 1 or 2, which is characterized in that carbon dust,
Iron oxide, zinc oxide, calcium silicates, molybdenum trioxide, calcium oxide, calcium aluminate, manganese dioxide, borax, active lime are less than 130 mesh.
5. a kind of preparation method of the desulfurizing agent containing molybdenum trioxide for smelting steel, which comprises the following steps:
1) by carbon dust, molybdenum trioxide, zinc oxide, calcium oxide, barium carbonate, sodium peroxide, sodium perborate, calcium silicates, calcium oxide, three
It aoxidizes two iron to choose in proportion, is put into reaction kettle and is heated to 800 DEG C~1000 DEG C, stir 30min~45min, fill component
Divide mixing；
2) 300 DEG C~500 DEG C are cooled to, calcium aluminate, sodium carbonate, iron oxide, active lime, magnesia, polyhydroxy are sequentially added
Additive, silica, aluminum oxide, calcium nitrite, manganese dioxide, borax are mixed 20~30min, are down to room temperature,
It is prepared into graininess；
3) above-mentioned particle is passivated in treatment process, the concentration of passivating solution is 50g/L~70g/L, and desulfurizing agent is made.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811026518.7A CN109112255A (en) | 2018-09-04 | 2018-09-04 | A kind of desulfurizing agent containing molybdenum trioxide and preparation method thereof for smelting steel |
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| CN201811026518.7A CN109112255A (en) | 2018-09-04 | 2018-09-04 | A kind of desulfurizing agent containing molybdenum trioxide and preparation method thereof for smelting steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797269A (en) * | 2019-01-21 | 2019-05-24 | 西安建筑科技大学 | A kind of additive inhibiting molybdenum oxide briquetting vaporization at high temperature and molybdenum oxide briquetting and its preparation and application |
-
2018
- 2018-09-04 CN CN201811026518.7A patent/CN109112255A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109797269A (en) * | 2019-01-21 | 2019-05-24 | 西安建筑科技大学 | A kind of additive inhibiting molybdenum oxide briquetting vaporization at high temperature and molybdenum oxide briquetting and its preparation and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: The town of Copper Mt. District 221000 Jiangsu city of Xuzhou Province Applicant after: Jiangsu Xugang iron and Steel Group Co.,Ltd. Address before: The town of Copper Mt. District 221000 Jiangsu city of Xuzhou Province Applicant before: XUZHOU DONGNAN STEEL & IRON INDUSTRIAL Co.,Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190101 |