CN104775005A - Calcium composite end deoxidizer for steelmaking and preparation method thereof - Google Patents
Calcium composite end deoxidizer for steelmaking and preparation method thereof Download PDFInfo
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- CN104775005A CN104775005A CN201510132486.9A CN201510132486A CN104775005A CN 104775005 A CN104775005 A CN 104775005A CN 201510132486 A CN201510132486 A CN 201510132486A CN 104775005 A CN104775005 A CN 104775005A
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Abstract
The invention discloses a calcium composite end deoxidizer for steelmaking. The deoxidizer is characterized by being prepared from the following raw materials by weight part: 34-40 of calcium silicide, 4-5 of bamboo charcoal, 13-18 of silicon carbide, 40-50 of 5% sulfuric acid, 4-5 of Sesbania gum, 3-5 of nano-graphite powder, and 3-4 of nano-titanium dioxide. The calcium composite end deoxidizer provided by the invention does not contain aluminum element, and has reasonable composition proportion. calcium silicide, calcium carbide, bamboo charcoal, nano-graphite powder and the like are added to prepare particles, then the particles are sintered and then pickled to form porous particles, so that calcium element can be effectively dissolved in molten steel and effectively react with oxygen in molten steel at the same time, the nozzle clogging phenomenon can be improved, the molten steel fluidity is improved, thereby improving the deoxidation effect. With low cost, the calcium composite end deoxidizer is feasible in production, and can achieve good economic benefits.
Description
Technical field
The present invention relates to deoxidant for steelmaking technical field, be specially a kind of steel-making calcium system compound end-deoxidizer and preparation method thereof.
Background technology
Steel liquid deoxidation is process procedure necessary in steelmaking process, in tapping process, add some element and oxygen to react the oxide compound generating and be insoluble to molten steel, thus reaching the object removing steel oxygen in water, deoxidation products is then the main source of nonmetallic inclusionsin steel.In order to effectively carry out deoxidation to molten steel, reductor should be selected by the processing requirement of deoxidation in steel making and Control and Inclusion Removal, removing more oxygen with less reductor, and reduce the content of inclusion content in melting steel.Reductor select the composition, pattern and the quantity that directly affect steel inclusion.
The use of molten steel end-deoxidizer successively lives through the processes such as ferrosilicoaluminum, Si-Al-Ba alloy and Si-Al-Ba-Ca.Usual employing Si-Al-Ba alloy is as molten steel end-deoxidizer, and ferrosilicon and ferromanganese are as alloying material.This deoxidation and alloying mode, affects by molten steel terminal C, tapping temperature and the lower quantity of slag etc., and cause Si, Mn composition fluctuation in steel large, the alloying element rate of recovery is unstable.And when reductor add-on is bigger than normal, in molten steel, dissolved aluminum exceedes to a certain degree, will cause generating solid-state Al
2o
3cluster inclusion, molten steel viscosity increases, and inclusion increases and eliminating of not easily floating, and finally causes middle water-coating port dross, and fluidity molten steel difference affects the direct motion of steelworks production always.And the composition of refractory materials, particularly SiO
2and Fe
2o
3deng content, very large on the loss impact of dissolved aluminum in steel and calcium, the Al of wherein oxidized formation
2o
3remove as the top of the slag can not be floated up in time, then make the possibility of nozzle clogging strengthen.Therefore, in order to reach better economic benefit, being badly in need of a kind of reductor of exploitation, can effectively solving the problem.
Summary of the invention
The object of this invention is to provide a kind of steel-making calcium system compound end-deoxidizer and preparation method thereof.Present component is not containing aluminium element, composition proportion is reasonable, add after calcium silicide, carbide of calcium, bamboo charcoal, Nano graphite powder etc. make particle and sinter, then pickling forms porous particle, calcium constituent can be made effectively to be dissolved in molten steel, effectively react with oxygen in molten steel, nozzle clogging phenomenon improves simultaneously, improves the mobility of molten steel.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of steel-making calcium system compound end-deoxidizer, is made up of the raw material of following weight part: calcium silicide 34-40, bamboo charcoal 4-5, silicon carbide 13-18, concentration are sulfuric acid 40-50, sesbania gum 4-5, Nano graphite powder 3-5, the nano titanium oxide 3-4 of 5%;
A kind of steel-making calcium system of the present invention compound end-deoxidizer, be made up of following concrete steps:
(1) calcium silicide, silicon carbide are put into pulverizer and is ground into 200 object powder formation mixed powders, then sesbania gum is mixed with the water of 40-50 DEG C of 3-5 times amount, be stirred to and dissolve completely, form the sesbania gum aqueous solution;
(2) bamboo charcoal is put into pulverizer and be ground into 200 order powder, then jointly add granulation in extruding granulator with mixed powder, the sesbania gum aqueous solution, Nano graphite powder, nano titanium oxide, control particle diameter is 6-7mm;
(3) particle is sent into baking oven with the temperature of 100-110 DEG C baking 30-40 minute, then send in sintering oven and to 430-450 DEG C of condition, sinter 1.5-2 hour with 8-10 DEG C/min of ramp, take out and be cooled to room temperature;
(4) by sintering after particle put into concentration be 5% sulfuric acid wash 35-45 minute, then filter, be washed till neutrality with deionized water, finally put into baking oven 95-105 DEG C again and dry and get final product.
The invention has the beneficial effects as follows: the present invention is not containing aluminium element, composition proportion is reasonable, and add after calcium silicide, carbide of calcium, bamboo charcoal, Nano graphite powder etc. make particle and sinter, then pickling forms porous particle, calcium constituent can be made effectively to be dissolved in molten steel, effectively react with oxygen in molten steel, nozzle clogging phenomenon improves simultaneously, improves the mobility of molten steel, thus raising deoxidation effect, cost is low, is practicable aborning, can obtain good economic benefit.
Specific embodiments
Below by specific examples, the present invention is described in detail.
A kind of steel-making calcium system compound end-deoxidizer, is made up of the raw material of following weight part (kilogram): calcium silicide 34, bamboo charcoal 4, silicon carbide 13, concentration are sulfuric acid 40, sesbania gum 4, Nano graphite powder 3, the nano titanium oxide 3 of 5%;
A kind of steel-making calcium system of the present invention compound end-deoxidizer, be made up of following concrete steps:
(1) calcium silicide, silicon carbide are put into pulverizer and is ground into 200 object powder formation mixed powders, then sesbania gum is mixed with the water of 40-50 DEG C of 3 times amount, be stirred to and dissolve completely, form the sesbania gum aqueous solution;
(2) bamboo charcoal is put into pulverizer and be ground into 200 order powder, then jointly add granulation in extruding granulator with mixed powder, the sesbania gum aqueous solution, Nano graphite powder, nano titanium oxide, control particle diameter is 6-7mm;
(3) particle is sent into baking oven and toast 30 minutes with the temperature of 100-110 DEG C, then send into sinter 1.5 hours under 8-10 DEG C/min of ramp to 430-450 DEG C of condition in sintering oven, taking-up is cooled to room temperature;
(4) by sintering after particle put into concentration be 5% sulfuric acid washing 35 minutes, then filter, be washed till neutrality with deionized water, finally put into baking oven 95-105 DEG C again and dry and get final product.
The radius using calcium deoxidizer of the present invention to produce be extract in the HRB335 Deformed Steel Bars of 22 millimeters radius that several samples and Si-Al-Ba alloy reductor produce be the HRB335 Deformed Steel Bars of 22 millimeters as a comparison, measure its mechanical property, as following table:
| Sample | Sample number/ | σs/ MPa | σb/MPa | δ5/% |
| Reductor of the present invention | 80 | 363-425 | 540-638 | 20-28 |
| Si-Al-Ba alloy reductor | 80 | 351-420 | 532-624 | 19-27 |
Use the HRB335 steel grade that calcium deoxidizer deoxidation is produced, the mechanical property of its stocking meets GB1499-1998 completely, and tensile strength and yield strength are all improved to some extent.
Claims (2)
1. a steel-making calcium system compound end-deoxidizer, it is characterized in that, be made up of the raw material of following weight part: calcium silicide 34-40, bamboo charcoal 4-5, silicon carbide 13-18, concentration are sulfuric acid 40-50, sesbania gum 4-5, Nano graphite powder 3-5, the nano titanium oxide 3-4 of 5%.
2. a kind of steel-making calcium system compound end-deoxidizer according to claim 1, is characterized in that, be made up of following concrete steps:
(1) calcium silicide, silicon carbide are put into pulverizer and is ground into 200 object powder formation mixed powders, then sesbania gum is mixed with the water of 40-50 DEG C of 3-5 times amount, be stirred to and dissolve completely, form the sesbania gum aqueous solution;
(2) bamboo charcoal is put into pulverizer and be ground into 200 order powder, then jointly add granulation in extruding granulator with mixed powder, the sesbania gum aqueous solution, Nano graphite powder, nano titanium oxide, control particle diameter is 6-7mm;
(3) particle is sent into baking oven with the temperature of 100-110 DEG C baking 30-40 minute, then send in sintering oven and to 430-450 DEG C of condition, sinter 1.5-2 hour with 8-10 DEG C/min of ramp, take out and be cooled to room temperature;
(4) by sintering after particle put into concentration be 5% sulfuric acid wash 35-45 minute, then filter, be washed till neutrality with deionized water, finally put into baking oven 95-105 DEG C again and dry and get final product.
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| CN201510132486.9A CN104775005A (en) | 2015-03-25 | 2015-03-25 | Calcium composite end deoxidizer for steelmaking and preparation method thereof |
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| CN201510132486.9A CN104775005A (en) | 2015-03-25 | 2015-03-25 | Calcium composite end deoxidizer for steelmaking and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059551A (en) * | 1991-07-02 | 1993-01-19 | Japan Casting & Forging Corp | Deoxidizer for refining molten iron and molten steel |
| CN1214216A (en) * | 1997-09-24 | 1999-04-21 | 臼井昭男 | Viscous liquid deoxidizer, deoxidizing sheet made thereof and manufacturing method for deoxidizing sheet |
| CN101033498A (en) * | 2006-12-21 | 2007-09-12 | 马鞍山中冶钢铁冶金科技实业有限公司 | Electric furnace highly effective metallurgy complexing agent |
| CN103695805A (en) * | 2013-11-18 | 2014-04-02 | 安徽利思达网业有限公司 | High strength and high wear-resistance stainless steel wire and preparation method thereof |
-
2015
- 2015-03-25 CN CN201510132486.9A patent/CN104775005A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059551A (en) * | 1991-07-02 | 1993-01-19 | Japan Casting & Forging Corp | Deoxidizer for refining molten iron and molten steel |
| CN1214216A (en) * | 1997-09-24 | 1999-04-21 | 臼井昭男 | Viscous liquid deoxidizer, deoxidizing sheet made thereof and manufacturing method for deoxidizing sheet |
| CN101033498A (en) * | 2006-12-21 | 2007-09-12 | 马鞍山中冶钢铁冶金科技实业有限公司 | Electric furnace highly effective metallurgy complexing agent |
| CN103695805A (en) * | 2013-11-18 | 2014-04-02 | 安徽利思达网业有限公司 | High strength and high wear-resistance stainless steel wire and preparation method thereof |
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Application publication date: 20150715 |
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