CN103278422A - Method for rapidly testing pure calcium cored wire - Google Patents
Method for rapidly testing pure calcium cored wire Download PDFInfo
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- CN103278422A CN103278422A CN2013102360331A CN201310236033A CN103278422A CN 103278422 A CN103278422 A CN 103278422A CN 2013102360331 A CN2013102360331 A CN 2013102360331A CN 201310236033 A CN201310236033 A CN 201310236033A CN 103278422 A CN103278422 A CN 103278422A
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- cupel
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Abstract
The invention belongs to the field of testing of metallic materials, and relates to a method for rapidly testing a pure calcium cored wire added in the calcium treatment technology in the process of molten steel refining. The method includes the steps as follows: the pure calcium wire is cut and weighed, and the weight of the pure wire is marked to be G0; the pure wire is sent to a laboratory and wholly cut into shorter wire segments, all the wire segments are immersed into a beaker with deionized water successively, sodium chloride is added, iron sheets are taken out and drained after the wire segments fully and completely react, the iron sheets are placed in a drying oven and dried, and the weight of the iron sheets is marked to be G1; and a solution in the beaker is poured out, precipitated and undissolved substances are taken out and placed in a constant-weight cupel, then the precipitated and undissolved substances are placed in the drying oven and dried, the precipitated and undissolved substances and the cupel are weighed together, the weight of the cupel is subtracted, and the weight of the precipitated and undissolved substances is marked to be G2, and a result is calculated. The reaction speed is accelerated due to the added sodium chloride which serves as a catalyst, a calcium core which originally cannot be completely dissolved in three days can completely react in ten minutes, a key problem is solved for planning a method for testing the pure calcium wire, and the quality testing of the pure calcium wire is realized.
Description
Technical field
The invention belongs to metallurgical material check field, relate to the method for quickly detecting of the pure calcium core-spun yarn that the calcium treatment process adds in the liquid steel refining process.
Background technology
The calcium processing is a kind of liquid steel refining means that grow up the seventies in 20th century in the metallurgy industry technological process.Its fundamental purpose is: 1, the degree of depth reduces harmful element content such as [O], [S] in the steel; 2, change snotter and form form, avoid cast aluminum killed steel generation nozzle blocking and improve steel mechanics performance.In history, once had directly add calcium alloy in the ladle, in the molten steel method such as winding-up calcium alloy, but owing to treatment effect instability or cost are crossed high reason and be eliminated gradually.What use now is that ladle is fed pure calcium line method, and it is that calcium alloy Ca is made core-spun yarn with the sheetmetal parcel, and the guide wire by wire feeder inserts molten steel with it with very high speed.Feed in the silk process and follow stirring of inert gas simultaneously, to increase the Ca residence time of steam bubble in molten steel and to carry out good mixing.This method has obtained widespread use and has obtained howling success in global iron and steel enterprise.
Calcium series core-spun yarn is widely used in ladle deoxidation and handles, with the electromagnetism orientation characteristic of the intensity, toughness and the high-performance silicon steel that improve special steel etc.At present, each big steel mill is all based on silicon-calcium wire, calcium iron wire, Ca 〉=30%, Fe 〉=70%, core grain weight 〉=230 grams/rice.
The main treatment effect that ladle is fed calcium line has:
1. the S in the reduction molten steel reduces sulphide inculsion content, finally forms CaS and is distributed in the steel, can not be out of shape when rolling;
2. the oxide inclusions in the molten steel does not form string bunch shape and changes the homodisperse Ca of containing oxide inclusions into, thereby reduces the snotter size, improves molten steel cleanness;
3. before tapping, add Ca, easily Al
2O
3Be mingled with the liquefy calcium-aluminate, be convenient to its polymerization come-up of growing up, thereby prevent nozzle blocking.But because the fusing point (845 ℃) of calcium metal is low, boiling point (1450 ℃) is low, in molten steel, very easily float on the slag surface with airborne oxygen and slag liquid in the oxide reaction and scaling loss is fallen, so core-spun yarn is fed into the molten metal deep when feeding silk as far as possible, utilize the static pressure of molten metal, prevent that calcium metal from gasifying fast, thereby prolong calcium metal residence time in molten steel, molten steel is played good calcium processing effect.
The effect of calcium in the pure calcium core-spun yarn: the degree of depth reduces in the steel harmful element content such as oxygen sulphur; Change the snotter tissue morphology, avoid cast aluminum killed steel generation nozzle blocking, and improve steel mechanics performance.
The objective of the invention is to seek and fast, accurately measure calcium core component content in the pure calcium core-spun yarn, by to its sample treatment, different medium example reaction situation, carry out various condition tests, determined the optimum analysis condition.
Owing to be subjected to the restriction of resources supplIes, the pure calcium core-spun yarn that steel industry is bought is settled accounts according to producing verification the verifying results always, does not have perfect relatively inspection procedure to come that it is carried out quality and checks on.Along with the continuous increase of steel mill to pure calcium core-spun yarn consumption, according to lifting molten steel refining technology level, the needs that reduce cost, it is particularly urgent that the quality inspection of pure calcium core-spun yarn seems.The content of the every composition of mensuration is accurately and timely just taked braking measure with steel-making for this reason, and is significant to optimizing the converter materials.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides the method for the pure calcium core-spun yarn of a kind of quick test, provide data and technical support to buying clearing, process for making.
The method for quickly detecting of pure calcium core-spun yarn of the present invention is to solve above technical matters by following technical scheme:
A kind of pure calcium core-spun yarn method for quickly detecting, this method comprises following step:
(1) the pure calcium line of clip, weighing is designated as G
0
(2) the pure calcium line clip in the step (1) is become segment, immersion fills in the beaker of deionized water, adds catalyzer, after reacting completely taking-up is drained the water, and oven dry, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, oven dry is weighed together with cupel, deducts cupel weight, is designated as G
2
(4) result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
As a kind of improvement of the present invention, the catalyzer in the step (2) is sodium chloride or potassium chloride.
Preferably, the above-mentioned method of inspection specifically comprises following step:
(1) the pure calcium line of clip length 0.95-1.05m, weighing is designated as G
0
(2) all intercept into the line segment that length is 1.5-2.5cm again after delivering to the laboratory, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 4.5-5.5g sodium chloride, the back for the treatment of fully to react completely is taken out and is drained the water, place 105 ℃ to dry 4-8 minute down, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, dried 20-40 minute down at 105 ℃, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
Preferred, in the above-mentioned step (2), all intercept into the line segment that length is 2cm again after delivering to the laboratory, it is in the 3000ml beaker that all line segments are immersed the volume that fills the 2000ml deionized water successively, add 5g sodium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, place 105 ℃ to dry 5 minutes down, weighing is designated as G
1
In the above-mentioned step (3), the solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, put into baking oven 105 ℃ of oven dry 30 minutes, weigh together with cupel, deduct cupel weight, be designated as G
2
Oven dry is to carry out in baking oven.
Preferably, the method for inspection of the present invention specifically comprises following step:
(1) the pure calcium line of clip length 0.95-1.05m, weighing is designated as G
0
(2) all intercept into the line segment that length is 1.5-2.5cm again after delivering to the laboratory, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 4.5-5.5g potassium chloride, the back for the treatment of fully to react completely is taken out and is drained the water, place 105 ℃ to dry 4-8 minute down, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, dried 20-40 minute down at 105 ℃, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
In the above-mentioned step (2), all intercept into the line segment that length is 2cm again after delivering to the laboratory, it is in the 3000ml beaker that all line segments are immersed the volume that fills the 2000ml deionized water successively, add 5g sodium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, place 105 ℃ to dry 5 minutes down, weighing is designated as G
1
Smelt production requirement for satisfying, method of testing should have following characteristics:
(1) sample appearance is pure, and the pure calcium core-spun yarn that clip length is about 1 meter intercepts into the line segment about length 2cm;
(2) add suitable electrolyte in the deionized water, guarantee that the calcium core that is wrapped up reacts completely;
(3) simple to operate, be easy to grasp.
Beneficial effect of the present invention is, the pure calcium core-spun yarn of method quick test of the present invention, accelerated reaction velocity by adding catalyzer sodium chloride, make original three days and all can't consoluet calcium core just react completely in 10 minutes, for the method for inspection of formulating pure calcium line has solved crucial problem, make the quality inspection of pure calcium line become possibility;
Improved the accuracy of measuring: after adding catalyzer, medium still is neutral, and foreskin and other impurity can not dissolve, and has only pure calcium to be able to reaction fully rapidly, active principle to be measured and classification of impurities accurately can be measured thus.
The clearing of pure calcium core-spun yarn are produced checking according to having been substituted by the quality judging index, and the quality unacceptable product is reported to the police in advance, have reduced purchase cost;
Check on and instruct STEELMAKING PRODUCTION and scientific research public relations bringing into play important effect for advancing factory's raw material, in the STEELMAKING PRODUCTION process, according to analyzing data adjustment batching, promote the raising of product quality, reduce waste product, create beneficial result.
Description of drawings
Fig. 1 is pure calcium core-spun yarn sample;
Fig. 2 is the course of reaction of sample in deionized water;
Fig. 3 is the course of reaction behind the adding sodium chloride;
Fig. 4 is the response situation contrast of different medium, and left side figure is the reaction in deionized water, and right figure is the reaction behind the adding sodium chloride;
Fig. 5 is the cross section contrast before and after the example reaction, cross section contrast before and after the reaction, and the left side is former state; The centre is three days sample of reaction in deionized water; The right is 10 minutes sample of reaction in sodium chloride.
Embodiment
Come the present invention is done further explanation below in conjunction with the drawings and specific embodiments, so that those skilled in the art more understands the present invention, but do not limit the present invention with this.
The objective of the invention is to seek the pure calcium core-spun yarn component content of accurate mensuration and substitute the production checking, reduce the steel-making use cost, by carrying out various condition tests, determined the optimum analysis condition.
Embodiment 1
Sample treatment: the pure calcium line about (1) clip length 1m, weighing is designated as G
0
(2) deliver to the line segment that all intercepts into again behind the laboratory about length 2cm, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 5g sodium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, placed 105 ° of C drying in oven 5 minutes, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, put into baking oven 105 ° of C oven dry 30 minutes, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
The present invention is by selecting suitable sample treatment, add an amount of electrolyte, having guaranteed that the calcium core in the pure calcium line has obtained sufficient reaction at short notice.
Comparative Examples 1
Sample treatment: use the pure calcium line of about 1 meter of pliers clip length at the scene, weighing is designated as G
0, deliver to the line segment that all intercepts into again behind the laboratory about length 2cm, all line segments are immersed successively in the 3000ml beaker of pre-Sheng 2000ml deionized water, iron sheet is taken out control water after making its reaction, placed 105 ° of C drying in oven 5 minutes, weighing is designated as G
1Solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, put into baking oven and under 105 ° of C, dried 30 minutes, weigh together with cupel, deduct cupel weight, be designated as G
2
In the method in the Comparative Examples 1, do not add sodium chloride or potassium chloride or even any catalyzer, so its reaction velocity is very slow, finishing once to test needs nearly week age, and iron sheet is corrosion in water, has influenced result's accuracy.
In the above contrast, add catalyzer reaction velocity afterwards and want fast, save the time, improved efficient.
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
The present invention is by selecting suitable sample treatment, adds sodium chloride and does electrolyte and carry out catalytic reaction, has guaranteed that the calcium core in the pure calcium line has obtained sufficient reaction at short notice.
Embodiment 2
Sample treatment: the pure calcium line about (1) clip length 1m, weighing is designated as G
0
(2) deliver to the line segment that all intercepts into again behind the laboratory about length 2cm, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 5g potassium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, placed 105 ° of C drying in oven 5 minutes, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, put into baking oven 105 ° of C oven dry 30 minutes, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
Embodiment 2 is in embodiment 2, catalyzer to be replaced with potassium chloride with the difference of embodiment 1.
Claims (8)
1. pure calcium core-spun yarn method for quickly detecting, this method comprises following step:
(1) the pure calcium line of clip, weighing is designated as G
0
(2) the pure calcium line clip in the step (1) is become segment, immersion fills in the beaker of deionized water, adds catalyzer, after reacting completely taking-up is drained the water, and oven dry, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, oven dry is weighed together with cupel, deducts cupel weight, is designated as G
2
(4) result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
2. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1 is characterized in that the catalyzer in the described step (2) is sodium chloride or potassium chloride.
3. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1 is characterized in that the described method of inspection specifically comprises following step:
(1) the pure calcium line of clip length 0.95-1.05m, weighing is designated as G
0
(2) all intercept into the line segment that length is 1.5-2.5cm again after delivering to the laboratory, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 4.5-5.5g sodium chloride, the back for the treatment of fully to react completely is taken out and is drained the water, place 105 ℃ to dry 4-8 minute down, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, dried 20-40 minute down at 105 ℃, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
4. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1, it is characterized in that, in the described step (2), all intercept into the line segment that length is 2cm again after delivering to the laboratory, it is in the 3000ml beaker that all line segments are immersed the volume that fills the 2000ml deionized water successively, adds 5g sodium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, place 105 ℃ to dry 5 minutes down, weighing is designated as G
1
5. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1, it is characterized in that, in the described step (3), solution in the beaker is poured out, the taking-up of precipitation insolubles is placed the cupel of constant weight, put into baking oven 105 ℃ of oven dry 30 minutes, weigh together with cupel, deduct cupel weight, be designated as G
2
6. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1 is characterized in that described oven dry is to carry out in baking oven.
7. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 1 is characterized in that the described method of inspection specifically comprises following step:
(1) the pure calcium line of clip length 0.95-1.05m, weighing is designated as G
0
(2) all intercept into the line segment that length is 1.5-2.5cm again after delivering to the laboratory, all line segments are immersed in the beaker that fills the 2000ml deionized water successively, add 4.5-5.5g potassium chloride, the back for the treatment of fully to react completely is taken out and is drained the water, place 105 ℃ to dry 4-8 minute down, weighing is designated as G
1
(3) solution in the beaker is poured out, the precipitation insolubles is taken out place the cupel of constant weight, dried 20-40 minute down at 105 ℃, weigh together with cupel, deduct cupel weight, be designated as G
2
Result of calculation:
Calcium core weight=G
0-G
1
Tare weight=G
1
Core skin ratio=(G
0-G
1)/G
1
Calcium content in the calcium core=［ (G
0-G
1-G
2)/(G
0-G
1) * 100%.
8. a kind of pure calcium core-spun yarn method for quickly detecting as claimed in claim 7, it is characterized in that, in the described step (2), all intercept into the line segment that length is 2cm again after delivering to the laboratory, it is in the 3000ml beaker that all line segments are immersed the volume that fills the 2000ml deionized water successively, adds 5g sodium chloride, after treating fully to react completely the iron sheet taking-up is drained the water, place 105 ℃ to dry 5 minutes down, weighing is designated as G
1
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|---|---|---|---|
| CN201310236033.1A CN103278422B (en) | 2013-06-14 | 2013-06-14 | Pure calcium core-spun yarn method for quickly detecting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310236033.1A CN103278422B (en) | 2013-06-14 | 2013-06-14 | Pure calcium core-spun yarn method for quickly detecting |
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| Publication Number | Publication Date |
|---|---|
| CN103278422A true CN103278422A (en) | 2013-09-04 |
| CN103278422B CN103278422B (en) | 2015-08-12 |
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ID=49061006
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168563A (en) * | 2016-08-02 | 2016-11-30 | 内蒙古包钢钢联股份有限公司 | The assay method of silico-calcium cored core grain weight amount |
| CN106950144A (en) * | 2017-04-28 | 2017-07-14 | 关忆恒 | The apparatus for peeling off and detection method of a kind of flux-cored wire filling rate detection |
| CN109030275A (en) * | 2018-09-11 | 2018-12-18 | 芜湖新兴铸管有限责任公司 | Seamless pure calcium line calcic measuring method |
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| CN102206732A (en) * | 2011-05-21 | 2011-10-05 | 马鞍山中冶钢铁冶金高新技术有限公司 | Solid-core passivated pure calcium cored wire and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168563A (en) * | 2016-08-02 | 2016-11-30 | 内蒙古包钢钢联股份有限公司 | The assay method of silico-calcium cored core grain weight amount |
| CN106950144A (en) * | 2017-04-28 | 2017-07-14 | 关忆恒 | The apparatus for peeling off and detection method of a kind of flux-cored wire filling rate detection |
| CN106950144B (en) * | 2017-04-28 | 2018-05-18 | 关忆恒 | A kind of apparatus for peeling off of flux-cored wire filling rate detection |
| CN109030275A (en) * | 2018-09-11 | 2018-12-18 | 芜湖新兴铸管有限责任公司 | Seamless pure calcium line calcic measuring method |
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|---|---|
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