CN205152266U - Concise deoxidation processing system of RH - Google Patents
Concise deoxidation processing system of RH Download PDFInfo
- Publication number
- CN205152266U CN205152266U CN201520958158.XU CN201520958158U CN205152266U CN 205152266 U CN205152266 U CN 205152266U CN 201520958158 U CN201520958158 U CN 201520958158U CN 205152266 U CN205152266 U CN 205152266U
- Authority
- CN
- China
- Prior art keywords
- empty room
- vacuum
- real empty
- air cooler
- vacuum chamber
- 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.)
- Expired - Fee Related
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model relates to a concise deoxidation processing system of RH belongs to steel industry and smelts technology technical field. Technical scheme is: contain real empty room (1), hot return bend (2), air cooler (3), top rifle controlling means (5), charge cavity (7), top rifle (8) and vacuum main valve (9), real empty room (1) be cylindrical vessel, and the shell is formed by the steel sheet welding, and the side of real empty room (1) is equipped with charge cavity (7), and the upper portion of real empty room (1) is through hot return bend (2) and air cooler (3) intercommunication, and vacuum main valve (9) and vacuum pump connection are passed through in air cooler (3), it is inside that top rifle (8) one end stretches into real empty room (1) from real empty room's (1) top, and the other end is connected with top rifle controlling means (5). The beneficial effects of the utility model are that: simple structure, technology is with low costs, is favorable to the circulation of molten steel vacuum, reduces oxide inclusion's production, improves the molten steel cleanliness factor, guarantees the product service property (quality).
Description
Technical field
The utility model relates to a kind of RH refinement and deoxidation treatment system, belongs to steel industry smelting technology technical field.
Background technology
In recent years national steel industry big area loss, a lot of place and private steel enterprise strengthen new product development dynamics on the one hand, strengthen cost tackling key problem on the other hand, along with the Development and Production of low-carbon (LC), Ultra-low carbon variety steel, progressively find the series of problems such as steel grade casting sequence low, production cost is high, the quality fluctuation produced through RH stove, seriously constrain the normal development process of variety steel.
RH steel is one of main method of molten steel vacuum deaeration process, and RH refinement and deoxidation treatment system complex structure conventional at present, process costs is high, and pourability of molten steel is poor.
Utility model content
The utility model object is to provide a kind of RH refinement and deoxidation treatment system, and structure is simple, adopts carburelant to carry out pre-deoxidation to molten steel in refining process, solves Problems existing in background technology.
The technical solution of the utility model is:
A kind of RH refinement and deoxidation treatment system, comprise vacuum chamber, hot-bending pipe, aircooling cabinet, top rifle control device, charge cavity, top rifle and vacuum main valve, described vacuum chamber is cylindrical vessel, shell is formed by Plate Welding, the side of vacuum chamber is provided with charge cavity, and the top of vacuum chamber is communicated with aircooling cabinet by hot-bending pipe, and aircooling cabinet is connected with vacuum pump by vacuum main valve, internal vacuum chamber is stretched into from the top of vacuum chamber in rifle one end, described top, and the other end is connected with top rifle control device.
Ash-removing valve is provided with below described aircooling cabinet.
Adopt the utility model, when RH enters the station oxygen level deficiency, utilize top rifle to carry out the oxygenating of oxygen blast gas; When RH enters the station oxygen level surplus, first at the end of molten steel initial ［ C ］ and ［ O ］ reaction, in molten steel in vacuum chamber, add carburelant in batches, then add aluminium class reductor until remove superfluous oxygen.
The beneficial effects of the utility model are: structure is simple, and adopt carburelant deoxidation, process costs is low, is conducive to molten steel vacuum cycle, the corresponding generation decreasing oxide inclusion, improve Cleanliness of Molten Steel, ensure product functional quality.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
In figure: vacuum chamber 1, hot-bending pipe 2, air cooler 3, ash-removing valve 4, top rifle control device 5, tubular stinger 6, charge cavity 7, top rifle 8, vacuum main valve 9.
Embodiment
Below in conjunction with accompanying drawing, by example, the utility model is described in further detail.
With reference to accompanying drawing 1, a kind of RH refinement and deoxidation treatment system, comprise vacuum chamber 1, hot-bending pipe 2, air cooler 3, top rifle control device 5, charge cavity 7, top rifle 8 and vacuum main valve 9, described vacuum chamber 1 is cylindrical vessel, shell is formed by Plate Welding, the side of vacuum chamber 1 is provided with charge cavity 7, the top of vacuum chamber 1 is communicated with air cooler 3 by hot-bending pipe 2, air cooler 3 is connected with vacuum pump by vacuum main valve 9, vacuum chamber 1 is stretched in rifle 8 one end, described top from the top of vacuum chamber 1 inner, and the other end is connected with top rifle control device 5.
In the present embodiment, ash-removing valve 4 is also provided with below air cooler 3.Top rifle control device 5 is common oxygen rifle Controlling System.
Adopt above-mentioned RH refinement and deoxidation treatment system, its treatment process is as follows:
The RH molten steel condition that enters the station is: C mass percent < 0.07%, and (O) content is 100-1000ppm, temperature >=1610 DEG C;
The RH ideal relationship that molten steel (O) content and RH enter the station between C content that enters the station is:
［ O ］
rH enters the station=(［ C ］
rH enters the station-［ C ］
target) × 10
4× 80ppm+ ［ O ］
oxygen more than target.
Wherein: ［ O ］
rH enters the station: RH enters the station molten steel (O) content;
［ C ］
rH enters the station: RH enters the station C content;
［ C ］
target: the lower limit of C content claimed range in steel grade standard;
［ O ］
oxygen more than target: 100-300ppm(determines according to target C content);
(1) when RH enters the station oxygen level deficiency, i.e. ［ O ］
rH enters the station< (［ C ］
rH enters the station-［ C ］
target) × 10
4× 80ppm+ ［ O ］
oxygen more than targettime, utilize top rifle 8 to carry out the oxygenating of oxygen blast gas, ［ O ］
oxygenating=(［ C ］
rH enters the station-［ C ］
target) × 10
4× 80ppm+ ［ O ］
oxygen more than target-［ O ］
rH enters the station, oxygenating amount is according to 1m
3oxygen molten steel increases 6ppm free oxygen and calculates;
(2) when RH enters the station oxygen level surplus, i.e. ［ O ］
rH enters the station>(［ C ］
rH enters the station-［ C ］
target) × 10
4× 80ppm+ ［ O ］
oxygen more than targettime, unnecessary oxygen level is i.e. ［ O ］
excessive=［ O ］
rH enters the station-(［ C ］
rH enters the station-［ C ］
target) × 10
4× 80ppm-［ O ］
oxygen more than target, carry out deoxidation by the following method:
A. first at the end of molten steel initial ［ C ］ and ［ O ］ reaction, in molten steel in vacuum chamber 1, carburelant is added in batches, single add-on≤10kg/ time, until remove unnecessary oxygen level i.e. ［ O ］
excessive;
B. aluminium class reductor is then added until remove ［ O ］
oxygen more than target.
The add-on of described aluminium class reductor aluminium is: Al=(1.125 × [O]
remaining)/η 1+ [Als]
target× t/ η 2L,
Wherein: [O]
remaining: add molten steel (O) content before aluminium;
η 1: the specific absorption 65-75% of aluminium;
η 2: the specific absorption 90-95% of aluminium;
[Als]
target: the intermediate value of Als content requirement scope in steel grade standard;
L: the purity of aluminium;
T: molten steel gross weight.
In RH refining process, adopt " carbon class reductor " to replace part aluminium class reductor to carry out pre-deoxidation to molten steel, effectively can reduce the consumption of aluminium class reductor.Deoxidation aluminium 0.21kg/t can be saved by calculating, aluminum shot unit price 12692 yuan/ton, increase carburelant and consume 0.17kg/t, increase carburelant unit price 1241 yuan/ton, the deoxidation specific absorption of carburelant is about 76%, then totally save deoxidation cost 0.21*12692/1000-0.17*1241/1000=2.45 unit/t, by through the 500000 tons of calculating of RH steel grade yearly plan output, this 500000*2.45=122.5 ten thousand yuan can be fallen altogether.
RH refinement and deoxidation is all adopt aluminium class reductor, must generate more Al like this
2o
3inclusion, if these inclusiones can not fully be removed, is easy to cause nozzle clogging in casting process, can causes product quality defect time serious.And adopt carburelant deoxidation to generate Al
2o
3inclusion, but generation CO gas is taken away by vacuum system, is not only conducive to molten steel vacuum cycle, the corresponding generation decreasing oxide inclusion, and can reduces production cost, improve Cleanliness of Molten Steel, ensure product functional quality.
Claims (2)
1. a RH refinement and deoxidation treatment system, it is characterized in that comprising vacuum chamber (1), hot-bending pipe (2), air cooler (3), top rifle control device (5), charge cavity (7), top rifle (8) and vacuum main valve (9), described vacuum chamber (1) is cylindrical vessel, shell is formed by Plate Welding, the side of vacuum chamber (1) is provided with charge cavity (7), the top of vacuum chamber (1) is communicated with air cooler (3) by hot-bending pipe (2), air cooler (3) is connected with vacuum pump by vacuum main valve (9), vacuum chamber (1) is stretched in rifle (8) one end, described top from the top of vacuum chamber (1) inner, the other end is connected with top rifle control device (5).
2. RH refinement and deoxidation treatment system according to claim 1, is characterized in that described air cooler (3) below is provided with ash-removing valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520958158.XU CN205152266U (en) | 2015-11-27 | 2015-11-27 | Concise deoxidation processing system of RH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520958158.XU CN205152266U (en) | 2015-11-27 | 2015-11-27 | Concise deoxidation processing system of RH |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205152266U true CN205152266U (en) | 2016-04-13 |
Family
ID=55687981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520958158.XU Expired - Fee Related CN205152266U (en) | 2015-11-27 | 2015-11-27 | Concise deoxidation processing system of RH |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205152266U (en) |
-
2015
- 2015-11-27 CN CN201520958158.XU patent/CN205152266U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20191127 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |