CN102564886A - Detection method for content of elemental calcium in alloy material for steelmaking - Google Patents
Detection method for content of elemental calcium in alloy material for steelmaking Download PDFInfo
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- CN102564886A CN102564886A CN2012100104393A CN201210010439A CN102564886A CN 102564886 A CN102564886 A CN 102564886A CN 2012100104393 A CN2012100104393 A CN 2012100104393A CN 201210010439 A CN201210010439 A CN 201210010439A CN 102564886 A CN102564886 A CN 102564886A
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- cupel
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Abstract
The invention relates to a detection method for the content of elemental calcium in alloy materials for steelmaking, belonging to the technical field of physical detection. The detection method is used for solving the problem in the determination of the content of the elemental calcium in the alloy materials. The detection method is characterized in that G1 g of calcium alloy powder materials are taken, the weight of a cupel is G2 g, the total weight of nitrided samples and the cupel is G3 g, the increased weight of the samples after nitriding is the weight of nitrogen absorbed by the elemental calcium which is calculated through the following formula: (G3-G2-G1), the weight of the elemental calcium in the samples can be calculated through the formula as shown in the accompanying drawing, and therefore the percentage of the elemental calcium in core powder can be calculated through the formula as shown in the accompanying drawing. By adopting the detection method, the content of the elemental calcium in the single-alloy materials can be accurately determined, effective data can be provided for steelmaking, the quantity of the calcium input into a furnace can be accurately controlled and the quality of molten steel is improved; and besides, the price negotiation according to the content of the elemental calcium is facilitated, the purchase cost is reduced and the economic benefits of enterprises are improved.
Description
Technical field
The present invention relates to a kind of detection method, especially steel-making belongs to the physical detection technical field with the detection method of simple substance calcium content in the alloy material.
Background technology
In the steelmaking process, the effect of simple substance calcium is a purify hot metal, but deoxidation, desulfurization.Simple substance calcium combines with alundum (Al with the formed calcium oxide of oxygen, further forms 12CaO7Al
2O
3Low melting point (1415 ℃) low-density slag emersion molten steel face, further purify hot metal, but also can change the shape of aluminum oxide improves the quality of the casting performance and the steel of molten steel.But the chemical detection method with present can only be measured full calcium, comprising simple substance calcium, calcium oxide and calcium salt etc.Can't detect the reason of simple substance calcium separately: present assay method all is the traditional wet analysis; Being about to sample dissolves fully; No matter be that the calcium of which kind of form all exists in solution with the form of calcium ion and measures, can only be calcium complete measure the result, and remove simple substance calcium in the full calcium; The calcium that other state exists can not play the effect of purify hot metal, so this difficult problem is perplexing STEELMAKING PRODUCTION always.
Summary of the invention
The present invention is used for overcoming the defective of prior art and a kind of detection method that detects accurate, simple and easy to do steel-making with alloy material simple substance calcium content is provided.
The alleged problem of the present invention solves with following technical proposals:
A kind of detection method of making steel with simple substance calcium content in the alloy material, special feature is that it carries out according to following step:
A. take by weighing calcium containing alloy granular material G rapidly
1Gram is put into the cupel after the constant weight in advance, the tiling sample, and cupel heavily is G
2Gram;
The cupel that b. will place sample is put into the tubular furnace that has been heated to 400 ~ 420 ℃ rapidly, opens nitrogen, feeds nitrogen from the cupel air admission hole; Discharge nitrogen from venthole, simple substance calcium fully reacted, treat complete reaction after; Be after weight no longer increases, sealing air admission hole and venthole are cooled to room temperature in nitrogen environment; Take out cupel, be weighed as G
3Gram;
C. be calculated as follows the content that draws simple substance calcium in the material:
Further be calculated as follows out the percentage composition of simple substance calcium in the calcium containing alloy granular material:
Above-mentioned steel-making is with the detection method of simple substance calcium content in the alloy material, and said cupel constant weight in advance is under 400 ~ 420 ℃ of high temperature, cupel accurately to be weighed.
The present invention is directed to the problem that steel-making is difficult to measure with simple substance calcium content in the alloy material; Through repetition test research; Designed a kind of simple and easy to do simple substance calcium content assay method, this method is utilized the active characteristic of simple substance calcium, directly with the nitrogenize of simple substance calcium; Through measuring nitrogen increased amount, indirect determination goes out the content of simple substance calcium in the alloy material.The invention has the beneficial effects as follows: 1, utilize the reaction generation CaCl2 of simple substance calcium and nitrogen to measure; Truly realized the mensuration of simple substance calcium; For STEELMAKING PRODUCTION provides valid data, that can accurately control the calcium containing alloy material goes into the stove amount, improves steel quality; Produce high value added product, bring potential economic benefit.2, the price of simple substance calcium can be determined the price with matter with the simple substance calcium content far above calcium oxide etc., reduces purchase cost, increases economic efficiency.3, steel-making refining energy consumption and cost have been reduced.
Description of drawings
Fig. 1 is the synoptic diagram of cupel used herein.
The label of each parts is represented as follows in the accompanying drawing: 1. cupel; 2. air admission hole; 3. venthole.
Embodiment
The present invention utilizes the active characteristic of simple substance calcium, and directly with the nitrogenize of simple substance calcium, through measuring nitrogen increased amount, indirect determination steel-making is with the content of simple substance calcium in the alloy material.Referring to Fig. 1, the concrete operations step is following:
1, takes by weighing calcium containing alloy granular material G rapidly
1Gram is put into the cupel 1 after 400 ~ 420 ℃ of accurate constant weights of high temperature in advance, the tiling sample, and cupel heavily is G
2Gram.(then will under nitrogen protection, carry out when if lump material need drill through or pulverize)
The airtight cupel that 2, will weigh up sample is put into the tubular furnace that has been heated to 400 ~ 420 ℃ rapidly, opens nitrogen, gets into nitrogen from air admission hole 2; Discharge nitrogen from venthole 3, make the fully reaction in the nitrogen atmosphere of cupel of simple substance calcium, treat complete reaction after; Be after weight no longer increases, sealing air admission hole and venthole are cooled to room temperature in nitrogen environment; Take out cupel, be weighed as G
3Gram.
3, calculate the content of simple substance calcium in the material:
Sample is heavy: G
1Gram,
Cupel is heavy: G
2Gram,
Sample after the nitrogenize+cupel is heavy: G
3Gram,
The weight that increases after the sample nitrogenize is the weight of simple substance calcium absorption nitrogen: (G
3– G
2– G
1) gram
Through calculating the weight that can draw simple substance calcium in the sample:
Thereby calculate the percentage composition of simple substance calcium in the alloy material:
Though the present invention has been that embodiment discloses as above with a kind of alloy material; Right its is not in order to limit the present invention; Under the situation that does not deviate from the present invention's design; Those of ordinary skill in the art work as can make various corresponding changes and variation according to the present invention, but these corresponding changes and variation all should belong to the protection domain of the appended claim of the present invention.
Below provide several specific embodiment of the present invention:
Embodiment 1: combine Fig. 1.Add a kind of material of rare earth calcium aluminium in the STEELMAKING PRODUCTION, recording full calcium in advance is 3.30%, can increase the non-constant of calcium effect, records the simple substance calcium content through said method and is merely 0.40%, conforms to fully with production reality.Operation steps is following:
1, drill through block rare earth calcium aluminium under the nitrogen protection, take by weighing 2.0003 grams rapidly, put in advance the cupel of constant weight, cupel heavily is 16.6734 grams, the tiling sample;
2, will weigh up the sample cupel and put into the tubular furnace 1 that has been heated to 400 ℃ rapidly, open nitrogen, get into nitrogen, discharge nitrogen, heat 4 hours, powered-down, sealing air inlet/outlet from venthole 3 from air admission hole 2.In nitrogen environment, be cooled to room temperature, take out cupel, be weighed as 18.6756 grams;
3, through calculating the content of simple substance calcium in the material, as:
Sample is heavy: 2.0003 grams,
Cupel is heavy: 16.6734 grams,
Sample after the nitrogenize+cupel is heavy: 18.6756 grams,
The weight that increases after the sample nitrogenize is the weight of simple substance calcium absorption nitrogen: (18.6756-16.6734-2.0003) gram,
Through calculating the weight that can draw simple substance calcium in the sample:
Thereby calculate the percentage composition of simple substance calcium in the rare earth calloy material:
Embodiment 2: combine Fig. 1.
1, take by weighing calcium containing alloy granular material 2.0007 grams rapidly, put into the cupel after 412 ℃ of high temperature constant weights in advance, tiling sample, cupel heavily are 16.9138 grams.
The cupel that 2, will weigh up sample is put into the tubular furnace 1 that has been heated to 412 ℃ rapidly, opens nitrogen, gets into nitrogen from air admission hole 2, discharges nitrogen from venthole 3, and simple substance calcium is fully reacted, treat complete reaction after, after promptly weight no longer increases, seal two holes.In nitrogen environment, be cooled to room temperature, take out cupel, be weighed as 18.9165 grams.
3, through calculating the content of simple substance calcium in the material, as:
Sample is heavy:: 2.0007 grams,
Cupel is heavy: 16.9138 grams,
Sample after the nitrogenize+cupel is heavy: 18.9165 grams,
The weight that increases after the sample nitrogenize is the weight of simple substance calcium absorption nitrogen: (18.9165-16.9138-2.0007) gram
Through calculating the weight that can draw simple substance calcium in the sample:
Thereby calculate the percentage composition of simple substance calcium in the alloy material:
Embodiment 3: combine Fig. 1.
1, take by weighing calcium containing alloy granular material 2.0013 grams rapidly, put into the cupel after 409 ℃ of high temperature constant weights in advance, tiling sample, cupel heavily are 17.1480 grams.
The cupel that 2, will weigh up sample is put into the tubular furnace 1 that has been heated to 409 ℃ rapidly, opens nitrogen, gets into nitrogen from air admission hole 2, discharges nitrogen from venthole 3; Can connect sebific duct, as shown in Figure 1, simple substance calcium is fully reacted; After treating complete reaction, after promptly weight no longer increases, seal two holes.In nitrogen environment, be cooled to room temperature, take out cupel, be weighed as 19.1514 grams.
3, through calculating the content of simple substance calcium in the material, as:
Sample is heavy:: 2.0013 grams,
Cupel is heavy: 17.1480 grams,
Sample after the nitrogenize+cupel is heavy: 19.1514 grams,
The weight that increases after the sample nitrogenize is the weight of simple substance calcium absorption nitrogen: (19.1514-17.1480-2.0013) gram
Through calculating the weight that can draw simple substance calcium in the sample:
Thereby calculate the percentage composition of simple substance calcium in the alloy material:
Embodiment 4: combine Fig. 1.
1, take by weighing calcium containing alloy granular material 2.0017 grams rapidly, put into the cupel after 415 ℃ of high temperature constant weights in advance, tiling sample, cupel heavily are 17.1490 grams.
The cupel that 2, will weigh up sample is put into the tubular furnace 1 that has been heated to 420 ℃ rapidly, opens nitrogen, gets into nitrogen from air admission hole 2, discharges nitrogen from venthole 3; Can connect sebific duct, as shown in Figure 1, simple substance calcium is fully reacted; After treating complete reaction, after promptly weight no longer increases, seal two holes.In nitrogen environment, be cooled to room temperature, take out cupel, be weighed as 19.15274 grams.
3, through calculating the content of simple substance calcium in the material, as:
Sample is heavy:: 2.0017 grams,
Cupel is heavy: 17.1490 grams,
Sample after the nitrogenize+cupel is heavy: 19.1527 grams,
The weight that increases after the sample nitrogenize is the weight of simple substance calcium absorption nitrogen: (19.1527-17.1490-2.0017) gram
Through calculating the weight that can draw simple substance calcium in the sample:
Thereby calculate the percentage composition of simple substance calcium in the alloy material:
Claims (2)
1. detection method of making steel with simple substance calcium content in the alloy material is characterized in that it carries out according to following step:
A. take by weighing calcium containing alloy granular material G rapidly
1Gram is put into the cupel (1) after the constant weight in advance, the tiling sample, and cupel heavily is G
2Gram;
The cupel that b. will place sample is put into the tubular furnace that has been heated to 400 ~ 420 ℃ rapidly, opens nitrogen, feeds nitrogen from cupel air admission hole (2); Discharge nitrogen from venthole (3), simple substance calcium fully reacted, treat complete reaction after; Be after weight no longer increases, sealing air admission hole and venthole are cooled to room temperature in nitrogen environment; Take out cupel, be weighed as G
3Gram;
C. be calculated as follows the content that draws simple substance calcium in the material:
Further be calculated as follows out the percentage composition of simple substance calcium in the calcium containing alloy granular material:
2. steel-making according to claim 1 is characterized in that with the detection method of simple substance calcium content in the alloy material: said cupel constant weight in advance is under 400 ~ 420 ℃ of high temperature, cupel accurately to be weighed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558113A (en) * | 2013-09-11 | 2014-02-05 | 河北钢铁股份有限公司邯郸分公司 | Method for determining content of free calcium oxide in steel slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664552A (en) * | 2005-03-29 | 2005-09-07 | 洛阳高新技术产业开发区精达科技工业有限公司 | Large test sample fireproof material high temperature thermogravimetric analyzer |
| CN101109738A (en) * | 2007-08-24 | 2008-01-23 | 中电投远达环保工程有限公司 | Method for analyzing quicklime composition |
| CN101329243A (en) * | 2008-07-28 | 2008-12-24 | 石家庄钢铁有限责任公司 | Method for measuring iron ore crystal water content |
-
2012
- 2012-01-13 CN CN2012100104393A patent/CN102564886A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664552A (en) * | 2005-03-29 | 2005-09-07 | 洛阳高新技术产业开发区精达科技工业有限公司 | Large test sample fireproof material high temperature thermogravimetric analyzer |
| CN101109738A (en) * | 2007-08-24 | 2008-01-23 | 中电投远达环保工程有限公司 | Method for analyzing quicklime composition |
| CN101329243A (en) * | 2008-07-28 | 2008-12-24 | 石家庄钢铁有限责任公司 | Method for measuring iron ore crystal water content |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558113A (en) * | 2013-09-11 | 2014-02-05 | 河北钢铁股份有限公司邯郸分公司 | Method for determining content of free calcium oxide in steel slag |
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Application publication date: 20120711 |