CN110004257A - Molten iron purification technology is used in a kind of casting of short route - Google Patents
Molten iron purification technology is used in a kind of casting of short route Download PDFInfo
- Publication number
- CN110004257A CN110004257A CN201910311791.2A CN201910311791A CN110004257A CN 110004257 A CN110004257 A CN 110004257A CN 201910311791 A CN201910311791 A CN 201910311791A CN 110004257 A CN110004257 A CN 110004257A
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- CN
- China
- Prior art keywords
- molten iron
- slag
- iron
- short route
- hot
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- 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
Abstract
The invention discloses a kind of short route casting molten iron purification technologies, (1) iron ore is poured into blast furnace, carry out heating and melting, (2) molten iron carries out preliminary scum filtering by the big lock of stokehold pushing off the slag, (3) silicon content of hot metal is preconditioned to target value 0.8%, (4) sulfur content of molten iron is dropped into 0.02% or less target value, (5) molten iron that joined desulfurizing agent is carried out to 30 seconds or so Stirrings immediately, (6) fishing slag is carried out to molten iron, (7) after above-mentioned process, molten iron is clean, ingredient is uniform, then it is quenched to enter temperature adjustment in short route electric induction furnace for direct hot charging, the present invention is handled molten iron by unique technique, increase and adjusts silicon, the equipment of sulfur content, increase the process that Stirring fishes out slag simultaneously, it realizes and energy consumption is effectively reduced, improve molten iron utilization rate, it reduces molten Slag improves qualified casting, improves the energy-saving effect of short route, reduce the function of production cost.
Description
Technical field
Invention is related to casting field, and molten iron purification technology is used in specifically a kind of short route casting.
Background technique
Casting is that the mankind grasp than a kind of metal heat processing technique earlier, has history in about 6000, and China about exists
B.C. 1700~it is 1000 first between entered heyday of bronze casting, have reached quite high level in technique, cast
It is to be cast to liquid metals in the casting cavity being adapted with part shape, after its cooled and solidified, to obtain part or hair
The method of base, was mostly solid-state but the metal (example: copper, iron, aluminium, tin, lead etc.) for being heated to liquid by casting material matter originally, and mold
Material can be sand, metal even ceramics, and in response to different requirements, the method used be would also vary from.
Short route casting is the iron liquid of blast furnace smelting out by quenched, and the processing such as temperature control are directly poured, compared with conventional cast
It makes process and eliminates the link that the pig iron carries out remelting again, reach energy-saving and emission-reduction, reduce cost, improve the purpose of production efficiency.
Short route casting is will to smelt iron a kind of great energy-saving processing technique to get up entirely with the organic knot of casting, due to blast furnace iron
Water the reasons such as is changed or is operated by material and influenced, and ingredient often fluctuates larger, and molten iron dregginess is more, ton molten iron dregginess
About 4.2kg significantly increases molten iron pretreatment and quenched cost, while increasing molten iron loss.
Therefore, it designs one kind and energy consumption is effectively reduced, improve molten iron utilization rate, reduce slag, improve qualified casting, improve
The energy-saving effect of short route, reduces the iron ash purification process of production cost, and exactly inventor will solve the problems, such as.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of invention is to provide a kind of short route casting molten iron purification technology, can be real
Energy consumption is now effectively reduced, improves molten iron utilization rate, reduces slag, improves qualified casting, improves the energy-saving effect of short route, drops
The function of low production cost.
Invention solves technical solution used by its technical problem: a kind of short route casting molten iron purification technology,
The following steps are included:
(1) iron ore is poured into blast furnace, carries out heating and melting, the temperature of molten iron is heated to >=1480 DEG C, chemical heat is (i.e.
Silicon content of hot metal) it is reduced to Si≤0.55%, the reduction rate of original molten iron harmful element Ti drops to Ti≤0.025%；
(2) molten iron is provided with the big lock of stokehold pushing off the slag on the iron tap channel of stokehold, molten iron is by the big lock of stokehold pushing off the slag by stokehold iron tap channel
Carry out preliminary scum filtering；
(3) stokehold increasing silicon in molten iron device is configured with before State of Blast Furnace, to silicon content of hot metal preconditioning to target value 0.8%；
(4) it is configured with desulfurizer at flowing molten iron mouth in connecing for blast furnace hot-metal bottle, with the molten iron of flowing together by desulfurizing agent (technical pure
Alkali) pour in hot-metal bottle, average molten steel consumption calcined soda for industry 5kg per ton, by the sulfur content of molten iron drop to target value 0.02% with
Under；
(5) it is configured with molten iron agitating device above hot-metal bottle tank position, the molten iron that joined desulfurizing agent is subjected to 30 seconds left sides immediately
Right Stirring, to realize the homogenization of whole tank hot metal composition and increase the desulfuration efficiency of desulfurizing agent；
(6) fishing slag is carried out to molten iron, the molten iron after desulfurization passes through the liquid of dragveyer by the dragveyer position of locomotive traction to rear side
Pressure slag rake pulls the slag for swimming in hot-metal bottle upper layer out, until visually observing molten iron surface without obvious slag；
(7) after above-mentioned process, molten iron is clean, and ingredient is uniform, and then direct hot charging enters adjusts in short route electric induction furnace
Temperature is quenched.
Further, the dregginess before the molten iron is undressed is about 4.2kg.
Further, the desulfurizing agent in the step (4) includes but are not limited to calcined soda for industry, the amount ratio of the desulfurizing agent
Example carries out different proportions according to the heterogeneity of desulfurizer therefor and distributes.
Advantageous effect of the invention is:
1. the present invention is handled molten iron by unique technique, increase the equipment for adjusting silicon, sulfur content, increases rotation and stir
The process mixed while fishing out slag realizes and energy consumption is effectively reduced, and improves molten iron utilization rate, reduces slag, improves qualified casting, mentions
The energy-saving effect of high short route reduces the function of production cost.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Combined with specific embodiments below, invention is further described, it should be appreciated that these embodiments be merely to illustrate invention without
For limiting the range of invention.In addition, it should also be understood that, those skilled in the art can be right after having read the content that invention is lectured
Invention makes various changes or modifications, and such equivalent forms also fall within application the appended claims limited range.
It is process flow chart of the invention referring to Fig. 1, a kind of short route casting molten iron purification technology comprising following step
It is rapid:
(1) iron ore is poured into blast furnace, carries out heating and melting, the temperature of molten iron is heated to >=1480 DEG C, chemical heat is (i.e.
Silicon content of hot metal) it is reduced to Si≤0.55%, the reduction rate of original molten iron harmful element Ti drops to Ti≤0.025%；
(2) molten iron is provided with the big lock of stokehold pushing off the slag on the iron tap channel of stokehold, molten iron is by the big lock of stokehold pushing off the slag by stokehold iron tap channel
Carry out preliminary scum filtering；
(3) stokehold increasing silicon in molten iron device is configured with before State of Blast Furnace, to silicon content of hot metal preconditioning to target value 0.8%；
(4) it is configured with desulfurizer at flowing molten iron mouth in connecing for blast furnace hot-metal bottle, with the molten iron of flowing together by desulfurizing agent (technical pure
Alkali) pour in hot-metal bottle, average molten steel consumption calcined soda for industry 5kg per ton, by the sulfur content of molten iron drop to target value 0.02% with
Under；
(5) it is configured with molten iron agitating device above hot-metal bottle tank position, the molten iron that joined desulfurizing agent is subjected to 30 seconds left sides immediately
Right Stirring, to realize the homogenization of whole tank hot metal composition and increase the desulfuration efficiency of desulfurizing agent；
(6) fishing slag is carried out to molten iron, the molten iron after desulfurization passes through the liquid of dragveyer by the dragveyer position of locomotive traction to rear side
Pressure slag rake pulls the slag for swimming in hot-metal bottle upper layer out, until visually observing molten iron surface without obvious slag；
(7) after above-mentioned process, molten iron is clean, and ingredient is uniform, and then direct hot charging enters adjusts in short route electric induction furnace
Temperature is quenched.
Dregginess before molten iron is undressed is about 4.2kg, and the desulfurizing agent in step (4) includes but are not limited to technical pure
Alkali, the usage ratio of desulfurizing agent carry out different proportions according to the heterogeneity of desulfurizer therefor and distribute.
In order to give full play to the energy-saving effect of short route casting, molten iron utilization rate and casting yield are improved, we will refine
The molten iron physical temperature of iron blast furnace is increased to >=1480 DEG C by 1500 DEG C, chemical heat (i.e. silicon content of hot metal) is reduced to by Si0.8%
The reduction rate of Si≤0.55%, original molten iron harmful element Ti falls below Ti≤0.025% by 0.05%, while molten iron is readily flowed,
Improve slag iron separation effect；
Long-term production statistics indicate that, cast through above-mentioned purification process treated molten iron compared to not processed short route, it is average
One ton of molten iron temperature adjustment power consumption is reduced to 86kWh from 130kWh, and molten iron utilization rate improves 1.6% or so than 96.2%, and quantity of slag ton iron subtracts
Few 2.8kg；Due to molten iron cleaning, the efficiency of postorder casting cast molding is improved, the field trash in casting, yield rate are reduced
1.3% or so are improved than 97%.The energy-saving effect of short route is significantly improved, production cost is reduced.
The present invention is handled molten iron by unique technique, increases the equipment for adjusting silicon, sulfur content, is increased rotation and is stirred
The process mixed while fishing out slag realizes and energy consumption is effectively reduced, and improves molten iron utilization rate, reduces slag, improves qualified casting, mentions
The energy-saving effect of high short route reduces the function of production cost.
Claims (4)
1. a kind of short route casting molten iron purification technology comprising following steps:
(1) iron ore is poured into blast furnace, carries out heating and melting, the temperature of molten iron is heated to >=1480 DEG C, chemical heat is (i.e.
Silicon content of hot metal) it is reduced to Si≤0.55%, the reduction rate of original molten iron harmful element Ti drops to Ti≤0.025%；
(2) molten iron is provided with the big lock of stokehold pushing off the slag on the iron tap channel of stokehold, molten iron is by the big lock of stokehold pushing off the slag by stokehold iron tap channel
Carry out preliminary scum filtering；
(3) stokehold increasing silicon in molten iron device is configured with before State of Blast Furnace, to silicon content of hot metal preconditioning to target value 0.8%；
(4) it is configured with desulfurizer at flowing molten iron mouth in connecing for blast furnace hot-metal bottle, with the molten iron of flowing together by desulfurizing agent (technical pure
Alkali) it pours in hot-metal bottle, average molten steel consumption calcined soda for industry 5kg per ton.
2. the sulfur content of molten iron is dropped to 0.02% or less target value；
(5) it is configured with molten iron agitating device above hot-metal bottle tank position, the molten iron that joined desulfurizing agent is subjected to 30 seconds left sides immediately
Right Stirring, to realize the homogenization of whole tank hot metal composition and increase the desulfuration efficiency of desulfurizing agent；
(6) fishing slag is carried out to molten iron, the molten iron after desulfurization passes through the liquid of dragveyer by the dragveyer position of locomotive traction to rear side
Pressure slag rake pulls the slag for swimming in hot-metal bottle upper layer out, until visually observing molten iron surface without obvious slag；
(7) after above-mentioned process, molten iron is clean, and ingredient is uniform, and then direct hot charging enters adjusts in short route electric induction furnace
Temperature is quenched.
3. a kind of short route casting molten iron purification technology according to claim 1, it is characterised in that: the molten iron is not
Dregginess before processing is about 4.2kg.
4. a kind of short route casting molten iron purification technology according to claim 1, it is characterised in that: the step (4)
In desulfurizing agent include but are not limited to calcined soda for industry, the usage ratio of the desulfurizing agent is according to the heterogeneity of desulfurizer therefor
Carry out different proportion distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311791.2A CN110004257A (en) | 2019-04-18 | 2019-04-18 | Molten iron purification technology is used in a kind of casting of short route |
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| CN201910311791.2A CN110004257A (en) | 2019-04-18 | 2019-04-18 | Molten iron purification technology is used in a kind of casting of short route |
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| CN110004257A true CN110004257A (en) | 2019-07-12 |
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| CN201910311791.2A Pending CN110004257A (en) | 2019-04-18 | 2019-04-18 | Molten iron purification technology is used in a kind of casting of short route |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408737A (en) * | 2019-08-14 | 2019-11-05 | 临沂玫德庚辰金属材料有限公司 | A kind of dedicated pig iron making process of wind power casting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63274710A (en) * | 1987-04-30 | 1988-11-11 | Nkk Corp | Production of silicon-containing cast iron |
| CN101348846A (en) * | 2008-09-10 | 2009-01-21 | 林州市合鑫铸业有限公司 | Blast furnace-intermediate frequency furnace duplexing smelting short process production technology |
| CN101545019A (en) * | 2009-05-07 | 2009-09-30 | 河北龙凤山铸业有限公司 | Method for smelting pig iron for high-silicon ultra-low-sulfur low-titanium ductile iron |
| CN101775452B (en) * | 2010-02-02 | 2011-04-20 | 河北龙凤山铸业有限公司 | Method for smelting ultra-low sulfur, silicon and titanium grey nodular cast iron by pig iron |
| CN102950277A (en) * | 2012-08-24 | 2013-03-06 | 恒润国际贸易(天津)有限公司 | Short-process molten iron casting process |
| CN106319129A (en) * | 2015-06-26 | 2017-01-11 | 姜蕾 | Short-process manufacturing method for producing casting for wind power generation equipment |
-
2019
- 2019-04-18 CN CN201910311791.2A patent/CN110004257A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63274710A (en) * | 1987-04-30 | 1988-11-11 | Nkk Corp | Production of silicon-containing cast iron |
| CN101348846A (en) * | 2008-09-10 | 2009-01-21 | 林州市合鑫铸业有限公司 | Blast furnace-intermediate frequency furnace duplexing smelting short process production technology |
| CN101545019A (en) * | 2009-05-07 | 2009-09-30 | 河北龙凤山铸业有限公司 | Method for smelting pig iron for high-silicon ultra-low-sulfur low-titanium ductile iron |
| CN101775452B (en) * | 2010-02-02 | 2011-04-20 | 河北龙凤山铸业有限公司 | Method for smelting ultra-low sulfur, silicon and titanium grey nodular cast iron by pig iron |
| CN102950277A (en) * | 2012-08-24 | 2013-03-06 | 恒润国际贸易(天津)有限公司 | Short-process molten iron casting process |
| CN106319129A (en) * | 2015-06-26 | 2017-01-11 | 姜蕾 | Short-process manufacturing method for producing casting for wind power generation equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408737A (en) * | 2019-08-14 | 2019-11-05 | 临沂玫德庚辰金属材料有限公司 | A kind of dedicated pig iron making process of wind power casting |
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Application publication date: 20190712 |