CN103642968A - Weight recording method for quantity of slag in molten iron - Google Patents
Weight recording method for quantity of slag in molten iron Download PDFInfo
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- CN103642968A CN103642968A CN201310628027.0A CN201310628027A CN103642968A CN 103642968 A CN103642968 A CN 103642968A CN 201310628027 A CN201310628027 A CN 201310628027A CN 103642968 A CN103642968 A CN 103642968A
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Abstract
The invention discloses a weight recording method for quantity of slag in molten iron. The weight recording method comprises the following sequential steps of weighing a molten iron pot filled with molten iron and recording as weight Ai; skimming the scrap iron in the molten iron pot into a steel slag pot; adding molten iron in the molten iron pot into a converter; weighing the returned empty molten iron pot and recording as weight Ki; separating molten iron from slag in scrap iron, weighing the slag and recoding as total weight Z; calculating slag rate of the molten iron, namely, total Z/sigma (Ai-Ki), wherein i is equal to 1-N, N is natural number greater than 1.
Description
Technical field
The invention belongs to the liquid iron water gaging field of converter steelmaking, relate in particular to a kind of weight scaling method of the molten iron band quantity of slag.
Background technology
The molten iron band quantity of slag is to weigh an important indicator of blast-melted purity, accounts foundation as the molten iron of material balance between ironmaking and steel-making simultaneously.At present, still do not have accurate molten iron band quantity of slag detection method to account foundation is provided for molten iron, only depend on tracer method (BaCO
3null readings) detect the molten iron band quantity of slag, yet there are three drawbacks in the method: one, tracer agent is expensive, and calibration cost is higher; Its two, tracer agent adds the molten iron can generating portion slag and make the quantity of slag increase, and affects data accuracy; Its three, it is larger to the cost impact of steelmaking system that the quantity of slag rises, the molten iron band quantity of slag can directly affect magnesium grain utilization ratio, the molten iron band quantity of slag is larger, magnesium grain utilization ratio is lower, the consumption of magnesium grain is also just higher.
At present, also have two kinds of methods can measure the molten iron band quantity of slag: the one, according to the useful volume estimation of blast furnace, general large blast furnace be controlled at useful volume 1.0% in, small furnace be controlled at useful volume 1.10% in; The 2nd, with the thickness that the easy devices such as aluminum strip are measured slag blanket, estimate slag weight.Yet these two kinds of methods record is estimated value, data accuracy is lower, can not, as the material balance foundation of molten iron between ironmaking and steel-making, can not reflect the true horizon of blast furnace quantity of slag control.
Summary of the invention
The object of the invention is to, by the wait operation separated with slag iron of skimming, directly the nt wt net weight of molten iron and slag be measured, to try to achieve more accurately the molten iron band quantity of slag.
To achieve these goals, the invention provides a kind of weight scaling method of the molten iron band quantity of slag, described weight scaling method comprises that the following step of carrying out is in order poly-: overweight, the weight of the iron ladle of molten iron is filled in weighing, is designated as A
i; Skim, the slag iron in iron ladle is all grilled in steel slag tank; Convert iron, after skimming, again the molten iron in iron ladle is blended into converter; Cross sky, weigh the weight of the empty iron ladle returning, be designated as K
i; Separation, carries out the molten iron in slag iron and slag separated, weighs slag and is heavily designated as Z
always; Calculate molten iron band slag rate=Z
always/ ∑ (A
i-K
i), wherein i=1,2 ..., N, N is greater than 1 natural number.
According to embodiments of the invention, in overweight step and the empty step of mistake, can adopt track scale to weigh as stoichiometric point.
According to embodiments of the invention, the overweight step of same iron ladle and excessively empty step are carried out on same track scale.
According to embodiments of the invention, in separating step, the slag iron in steel slag tank is sent into electric furnace and melt, so that the molten iron in slag iron is separated with slag.
According to embodiments of the invention, before sending electric furnace to, first weigh the gross weight of slag iron, be designated as X
always.
According to embodiments of the invention, until slag iron, in electric furnace, fully after fusing, molten iron to be toppled over out, the weight that weighs molten iron is designated as W
always, X
always-W
always=Z
always.
According to embodiments of the invention, N≤15.
Embodiment
Below in conjunction with embodiment, the invention will be further elaborated, yet following embodiment only plays exemplary illustration, can not be used for limiting the present invention.
The invention provides a kind of weight scaling method of the molten iron band quantity of slag, specifically, adopt weighting method to carry out the demarcation of the molten iron band quantity of slag, then by calculative determination molten iron band slag rate.Described weight scaling method comprises the following steps of carrying out in order: overweight, the weight of the iron ladle of molten iron is filled in weighing, is designated as A
i; Skim, the slag iron in iron ladle is all grilled in steel slag tank; Convert iron, after skimming, again the molten iron in iron ladle is blended into converter; Cross sky, weigh the weight of the empty iron ladle returning, be designated as K
i; Separation, carries out the molten iron in slag iron and slag separated, weighs slag and is heavily designated as Z
always; Calculate molten iron band slag rate=Z
always/ ∑ (A
i-K
i), wherein i=1,2 ..., N, N is greater than 1 natural number.
According to embodiments of the invention, can adopt track scale to measure A
iand K
ivalue.The track scale that first a definite weighting error is less before demarcation, as stoichiometric point, in order further to reduce measuring error, requires the overweight step of same iron ladle, the empty step of mistake to carry out on same track scale.
At timing signal, first select an iron ladle that tank skin is clean, allocate this iron ladle into the blast furnace operation of tapping a blast furnace, after going out full molten iron in tank, this iron ladle is overweight on selected track scale, and weighing value is designated as A
i.Again iron ladle is sent into steel making working procedure and take off slag operation, the slag iron in tank is all grilled in selected steel slag tank, described steel slag tank is preferably the slack tank of clean dried.Skim after end, the molten iron in iron ladle is all blended into converter and carries out subsequent smelting, the empty iron ladle returning is excessively empty on same track scale, and weighing value is designated as K
i, A
ideduct K
igained difference is the weight of molten iron.
In being grilled into the slag iron of steel slag tank, not only comprise solid slag, be also included in and take off the partial molten iron being inevitably entrained with in slag operation, if the weight that directly weighs slag iron is as slag weight, the molten iron band slag rate score that makes finally to record is bigger than normal, there is plus deviation.In order to obtain the accurate weight of slag, the present invention also comprises the slag iron in steel slag tank is carried out to separated step, preferably, can utilize the separated molten iron of furnace melting and solid slag.In order to reduce measuring error, can demarcate a plurality of iron ladles, the slag iron that every tank is clawed is all collected in steel slag tank, then unification is sent into electric furnace molten minute.
Before skimming first, first weigh the weight of clean empty steel slag tank, be designated as X
0, skim at every turn finish all to weigh the weight of steel slag tank later, be designated as X
i, X
ideduct X
i-
1gained difference is the weight of the slag iron clawing for the i time, is designated as X
slag, skim for the last time after end, calculating slag iron gross weight is ∑ X
slag=X
always.Until slag iron is sent into after electric furnace, the heat in electric furnace makes the part that can melt in slag iron all be fused into liquid molten iron, and molten iron is poured out to electric furnace, measures the weight of molten iron, is designated as W
always, X
alwaysdeduct W
alwaysgained difference is the weight of solid slag residual in electric furnace, is designated as Z
always.
By above-mentioned numerical value A
i, K
i, Z
alwaysbring formula Z into
always/ ∑ (A
i-K
i) can obtain molten iron band slag rate, owing to repeatedly measuring, can reduce error, therefore, the value of i can be any natural number that is greater than 1, that is: i=1,2 ..., N.Yet, consider the feasibility of actually operating, according to exemplary embodiment of the present invention, preferably, N≤15.
Below, in conjunction with concrete example, enforcement of the present invention is further elaborated.
Example 1:
Iron ladle goes out after full molten iron, overweight at same track scale, cross empty 9 times, and the slag iron at every turn clawing is collected in steel slag tank, send into electric furnace and melt minute, isolate molten iron and solid slag, weigh numerical value corresponding to each operation steps, calculate molten iron band slag rate, result is as shown in table 1.
Table 1 weight of molten iron nominal data (unit: ton)
In sum, weight scaling method of the present invention, thus the content that can detect exactly infusibility solid slag in molten iron obtains real molten iron band slag rate.Molten iron with slag rate, after demarcating, can detect the band quantity of slag of every tank molten iron, according to weight of molten iron, can obtain fast the band quantity of slag, for the blast furnace quantity of slag control and ironmaking and make steel between molten iron material balance reliable basis is provided.
Yet; the present invention is not limited to above-described embodiment; any those skilled in the art without departing from the spirit and scope of the present invention, can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope being defined in claims.
Claims (7)
1. a weight scaling method for the molten iron band quantity of slag, described weight scaling method comprises that the following step of carrying out is in order poly-:
Overweight: to weigh the weight of the iron ladle of filling molten iron, be designated as A
i;
Skim: the slag iron in iron ladle is all grilled in steel slag tank;
Convert iron: the molten iron in iron ladle is blended into converter;
Cross empty: weigh the weight of the empty iron ladle returning, be designated as K
i;
Separated: the molten iron in slag iron and slag to be carried out separated, weigh slag and be heavily designated as Z
always;
Calculate: molten iron band slag rate=Z
always/ ∑ (A
i-K
i), wherein i=1,2 ..., N, N is greater than 1 natural number.
2. weight scaling method as claimed in claim 1, wherein, adopts track scale to weigh as stoichiometric point in overweight step with in crossing empty step.
3. weight scaling method as claimed in claim 2, wherein, the overweight step of same iron ladle and cross empty step and carry out on same track scale.
4. weight scaling method as claimed in claim 1, wherein, in separating step, sends the slag iron in steel slag tank into electric furnace and melts, so that the molten iron in slag iron is separated with slag.
5. weight scaling method as claimed in claim 4, wherein, before sending electric furnace to, first weighs the gross weight of slag iron, is designated as X
always.
6. weight scaling method as claimed in claim 5, wherein, fully topples over out by molten iron after fusing in electric furnace until slag iron, and the weight that weighs molten iron is designated as W
always, X
always-W
always=Z
always.
7. weight scaling method as claimed in claim 1, wherein, N≤15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628027.0A CN103642968A (en) | 2013-11-28 | 2013-11-28 | Weight recording method for quantity of slag in molten iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310628027.0A CN103642968A (en) | 2013-11-28 | 2013-11-28 | Weight recording method for quantity of slag in molten iron |
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| Publication Number | Publication Date |
|---|---|
| CN103642968A true CN103642968A (en) | 2014-03-19 |
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ID=50248248
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310628027.0A Pending CN103642968A (en) | 2013-11-28 | 2013-11-28 | Weight recording method for quantity of slag in molten iron |
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|---|---|
| CN (1) | CN103642968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410860A (en) * | 2022-01-18 | 2022-04-29 | 山东钢铁集团永锋临港有限公司 | Molten iron charge control method based on measurement of liquid level meter under blast furnace |
-
2013
- 2013-11-28 CN CN201310628027.0A patent/CN103642968A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| Л•M•阿里斯特等: "《转炉车间作业机械化》", 31 December 1983 * |
| 张春等: ""转炉铁水重量数据自动采集处理系统及其应用"", 《鞍钢技术》 * |
| 李建军 等: ""不锈渣钢成分的测定"", 《山西冶金》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410860A (en) * | 2022-01-18 | 2022-04-29 | 山东钢铁集团永锋临港有限公司 | Molten iron charge control method based on measurement of liquid level meter under blast furnace |
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Application publication date: 20140319 |