CN111088452B - Method and device for reducing alloy smelting cost - Google Patents
Method and device for reducing alloy smelting cost Download PDFInfo
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- CN111088452B CN111088452B CN201911291782.8A CN201911291782A CN111088452B CN 111088452 B CN111088452 B CN 111088452B CN 201911291782 A CN201911291782 A CN 201911291782A CN 111088452 B CN111088452 B CN 111088452B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- G06F17/10—Complex mathematical operations
Abstract
The embodiment of the invention provides a method for reducing alloy smelting cost, which comprises the following steps: determining the adding amount of the alloy to be added in each ton of steel; after alloying the steel grade, determining the total weight percentage of C elements in the molten steel; determining the total weight percentage of the P element in the molten steel; determining the total weight percentage of the S element in the molten steel; determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added; determining an alloy minimum cost control model according to the total weight percentage of C elements in the molten steel, the total weight percentage of P elements in the molten steel, the total weight percentage of S elements in the molten steel and the cost of the alloy to be added; and determining the optimal costization proportioning scheme of the alloy added into the molten steel according to the alloy minimum cost control model.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and particularly relates to a method and a device for reducing alloy smelting cost.
Background
The manufacturing cost of the steel smelting process is directly related to the benefits of steel enterprises. The steel smelting and manufacturing cost is composed of raw material cost, process cost and alloy cost, and the alloy cost is directly related to the manufacturing cost of steel products, so that the control on the alloy smelting cost is very important.
In order to ensure the product performance in steel smelting, some alloy elements need to be added into steel. In order to realize the control of various alloy elements in the smelting process, different ferroalloys are needed to be adopted to control various alloy elements in the smelting process, and various ferroalloys correspond to individual elements.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for reducing alloy smelting cost, which are used for solving the technical problem that the alloy cost added into molten steel cannot be controlled in the prior art, so that the steel smelting cost cannot be effectively controlled.
The invention provides a method for reducing the cost of smelting alloy, which comprises the following steps:
determining the addition amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in refined molten steel, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy;
after alloying the steel grade, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after smelting in a primary smelting furnace and the weight percentage of the C element in the molten steel after refining;
determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the P element in the molten steel after refining;
determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining;
determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added;
determining an alloy minimum cost control model according to the total weight percentage of C elements in the molten steel, the total weight percentage of P elements in the molten steel, the total weight percentage of S elements in the molten steel and the cost of the alloy to be added;
determining an alloy proportioning scheme added into the molten steel according to the alloy minimum cost control model; wherein the alloy minimum cost control model comprises:
n is the number of alloy elements to be added into the alloy, l is the number of the alloy types to be added, i is the alloy element types to be added into the alloy, x is the alloy to be added, and
for the cost of the alloy to be added, the
For a plurality of alloys to be added with the lowest cost, said
The weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of C element in the refined molten steel
The weight percentage of the C element brought into the molten steel by the alloy to be added is
The weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the P element in the refined molten steel
Is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
The weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the S element in the refined molten steel
Is the weight percentage of the S element brought into the molten steel by the alloy to be added, the aCIs the weight of C element in the target component of the steel gradePercent of the aPIs the weight percentage of P element in the target component of the steel grade, the aSIs the weight percentage of the S element in the target component of the steel grade.
Optionally, the determining the addition amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in the molten steel after the steel is smelted in the primary smelting furnace, the weight percentage of each alloy element in the refined molten steel, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy includes:
according to the formula
Determining the amount of said alloy to be added per ton of steel
Wherein the content of the first and second substances,
a is aiIs the weight percentage of each alloy element in the target components of the steel grade
Is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace, wherein
Is the weight percentage of each alloy element in the molten steel after refining
Is the weight percentage of each alloy element in the alloy to be added, the
And in order to obtain the yield of each alloy element in the alloy to be added, x is the alloy to be added, and i is the alloy element type contained in the alloy to be added.
Optionally, before determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after the initial smelting, and the weight percentage of the C element in the molten steel after the refining, the method includes:
according to the formula
Determining the weight percentage of the C element brought into the molten steel by the alloy to be added
Wherein i is the kind of the alloying element to be added into the alloy, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of carbon C element in the alloy to be added, the
The yield of the C element in the alloy to be added is shown.
Optionally, before determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting, and the weight percentage of the P element in the molten steel after refining, the method includes:
according to the formula
Determining the weight percentage of the P element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of the carbon P element in the alloy to be added, the
The yield of the P element in the alloy to be added is shown.
Optionally, before determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after the initial smelting, and the weight percentage of the S element in the molten steel after the refining, the method includes:
according to the formula
Determining the weight percentage of the S element brought into the molten steel by the alloy to be added
Wherein i is the kind of the alloying element to be added into the alloy, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of the carbon S element in the alloy to be added, the
The yield of the S element in the alloy to be added is shown.
Optionally, the determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added includes:
according to the formula
Determining the cost of the alloy to be added
Wherein, the
In the amount of the alloy to be added, the
And for the current unit price of the alloy to be added, i is the kind of the alloy element contained in the alloy to be added, and x is the alloy to be added.
The invention also provides a device for reducing the cost of smelting alloy, which comprises:
the first determining unit is used for determining the adding amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in refined molten steel, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy;
the second determining unit is used for determining the total weight percentage of the C element in the molten steel after alloying the steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after primary smelting and the weight percentage of the C element in the molten steel after refining;
determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the P element in the molten steel after refining;
determining the total weight percentage of the S element in the molten steel according to the weight percentage of the C element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining;
the third determining unit is used for determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added;
a fourth determining unit, configured to determine an alloy minimum cost control model according to the total weight percentage of the P element in the molten steel, the total weight percentage of the S element in the molten steel, and the cost of the alloy to be added;
a fifth determining unit, configured to determine an alloy proportioning scheme added to the molten steel according to the alloy minimum cost control model; wherein the alloy minimum cost control model comprises:
n is the number of alloy elements to be added into the alloy, l is the number of the alloy types to be added, i is the alloy element types contained in the alloy to be added, x is the alloy to be added, and
for the cost of the alloy to be added, the
For a plurality of alloys to be added with the lowest cost, said
The weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of C element in the refined molten steel
The weight percentage of the C element brought into the molten steel by the alloy to be added is
The weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the P element in the refined molten steel
Is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
The weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the S element in the refined molten steel
Is the weight percentage of the S element brought into the molten steel by the alloy to be added, the aCIs the weight percentage of the C content in the target component of the steel grade, the aPIs the weight percentage of the P content in the target component of the steel grade, the aSIs the weight percentage of the S content in the target component of the steel grade.
Optionally, the first determining unit is specifically configured to:
according to the formula
Determining the amount of said alloy to be added per ton of steel
Wherein the content of the first and second substances,
a is aiIs the weight percentage of each alloy element in the target components of the steel grade
Is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace, wherein
Is the weight percentage of each alloy element in the molten steel after refining
Is the weight percentage of each alloy element in the alloy to be added, the
And i is the yield of each alloy element in the alloy to be added, and i is the type of the alloy element contained in the alloy to be added.
Optionally, the second determining unit is further configured to:
according to the formula
Determining the weight percentage of the C element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of carbon C element in the alloy to be added, the
The yield of the C element in the alloy to be added is shown.
Optionally, the second determining unit is further configured to:
according to the formula
Determining the weight percentage of the S element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of the carbon S element in the alloy to be added, the
The yield of the S element in the alloy to be added is shown.
The embodiment of the invention provides a method for reducing alloy smelting cost, which is characterized by comprising the following steps: determining the addition amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in the molten steel after refining, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy; after alloying the steel grade, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after smelting in a primary smelting furnace and the weight percentage of the C element in the molten steel after refining; according to the weight percentage of the P element brought into the molten steel by the alloy to be added, smelting in a primary smelting furnace, and then adding into the molten steelDetermining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element in the molten steel after refining; determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining; determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added; determining an alloy minimum cost control model according to the total weight percentage of C elements in the molten steel, the total weight percentage of P elements in the molten steel, the total weight percentage of S elements in the molten steel and the cost of the alloy to be added; determining an alloy proportioning scheme added into the molten steel according to the alloy minimum cost control model; wherein the alloy minimum cost control model comprises:
n is the number of alloy elements to be added into the alloy, i is the kind of the alloy elements to be added into the alloy, l is the number of the kind of the alloy to be added, x is the alloy to be added, and
for the cost of the alloy to be added, the
For a plurality of alloys to be added with the lowest cost, said
The weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of C element in the refined molten steel
The weight percentage of the C element brought into the molten steel by the alloy to be added is
The weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the P element in the refined molten steel
Is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
The weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the S element in the refined molten steel
Is the weight percentage of the S element brought into the molten steel by the alloy to be added, the aCIs the weight percentage of the C content in the target component of the steel grade, the aPIs the weight percentage of the P content in the target component of the steel grade, the aSThe weight percentage of the S content in the target component of the steel grade; therefore, the determined alloy minimum cost control model fully considers the target components of the steel, the content of impurity elements brought by the added alloy, the cost of the alloy and other factors, so that before steel smelting, the alloy proportioning scheme determined by the model can meet the requirements of the target components of the steel, the alloy cost can be effectively controlled, and the steel smelting cost can be further controlled.
Drawings
FIG. 1 is a schematic flow chart of a method for reducing the cost of smelting alloy according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an apparatus for reducing the cost of smelting alloy according to an embodiment of the present invention.
Detailed Description
The method aims to solve the technical problem that the alloy cost added into molten steel cannot be controlled in the prior art, and further the steel smelting cost cannot be effectively controlled. The invention provides a method and a device for reducing alloy smelting cost, and the determined alloy minimum cost control model fully considers the factors of target components of steel, the content of impurity elements brought by the added alloy, the alloy cost and the like, so that before steel smelting, an alloy proportioning scheme determined by the model can meet the requirements of the target components of the steel, the alloy cost can be effectively controlled, and the steel smelting cost can be further controlled.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The embodiment provides a method for reducing the cost of smelting alloy, and as shown in fig. 1, the method comprises the following steps:
s110, determining the adding amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in the molten steel after refining, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy;
in order to ensure the product performance in steel production, some alloy elements need to be added into steel, and common alloy elements comprise Ni, Cu, Mo, Si, Mn, Cr, Al, Nb, V, Ti, Ca and the like. The addition of the alloy in the steel smelting process is divided into inert elements and easily-oxidizable elements according to the physical property characteristics of the alloy; combining a smelting process of 'primary smelting furnace smelting-refining-continuous casting', and alloying inert elements (Ni and Cu) in the primary smelting furnace smelting; the oxidizable elements (Si, Mn, Cr, Al, Nb, V, Ti, Ca, etc.) are alloyed after the primary smelting. When adding the relevant alloy elements, the addition is generally realized by adding the corresponding alloy; for example, if Mn element needs to be added, corresponding alloys such as silicon-manganese alloy, metal manganese, low-carbon ferromanganese, medium-carbon ferromanganese, or high-carbon ferromanganese can be added into the molten steel. It should be noted that each alloy includes many alloy elements, for example, the silicon-manganese alloy includes not only Mn element but also C, P, S, Si element.
In this step, according to the target components of the steel type, when a certain alloy (to-be-added alloy) is used to alloy the molten steel, the addition amount of the alloy to be added to each ton of steel can be determined according to the weight percentage of each alloy element in the molten steel after the steel type is smelted in the primary furnace, the weight percentage of each alloy element in the molten steel after refining and continuous casting (the steel type in this embodiment needs refining and continuous casting, where the obtained weight percentage is the weight percentage of each alloy element in the molten steel after continuous casting), the weight percentage of each alloy element in the to-be-added alloy, and the yield of each alloy element in the to-be-added alloy, and can be specifically realized by formula (1):
in the formula (1), the first and second groups,
the amount of said alloy to be added per ton of steel,
is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of each alloy element in the molten steel after refining,
is the weight percentage of each alloy element to be added into the alloy,
and in order to obtain the yield of each alloy element to be added into the alloy, x is the alloy to be added, and i is the type of the alloy element contained in the alloy to be added.
S111, after alloying the steel grade, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after smelting in a primary smelting furnace and the weight percentage of the C element in the molten steel after refining;
after alloying the molten steel, the impurity elements in the alloy inevitably can be brought into the molten steel, influence the target composition of molten steel, and the impurity elements generally include: C. p and S.
After alloying the steel, determining the weight percentage of the C element brought into the molten steel by the alloy to be added according to the addition amount of the alloy to be added into each ton of steel, the weight percentage of the C element in the alloy to be added and the yield of the C element in the alloy to be added, which can be specifically realized by a formula (2):
in the formula (2), i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon C element in the alloy to be added,
the yield of the C element in the alloy to be added is shown. Wherein the content of the first and second substances,
can be listed in advance according to the components to be added into the alloyIt is determined that,
can be determined according to production experience data.
And after the weight percentage of the C element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element brought into the molten steel by the added alloy, the weight percentage of the C element in the molten steel after the initial smelting and the weight percentage of the C element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the C element in the molten steel is less than or equal to the total weight percentage a of the C element specified in the target component of the steelCThus, the quality of the product can be ensured.
S112, determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the P element in the molten steel after refining;
in the same way, after alloying the steel grade, the weight percentage of the P element brought into the molten steel by the alloy to be added is determined according to the addition amount of the alloy to be added in each ton of steel, the weight percentage of the carbon P element in the alloy to be added and the yield of the P element in the alloy to be added, and can be specifically realized by a formula (3):
in formula (3), i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon P element in the alloy to be added,
the yield of the P element in the alloy to be added is shown. Wherein the content of the first and second substances,
may be determined in advance from a composition table to be added to the alloy,
can be determined according to production experience data.
And after the weight percentage of the P element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the added alloy, the weight percentage of the P element in the molten steel after the initial smelting and the weight percentage of the P element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the P element in the molten steel is less than or equal to the total weight percentage a of the P element specified in the target component of the steelPThus, the quality of the product can be ensured.
S113, determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining;
in the same way, after alloying the steel grade, the weight percentage of the S element brought into the molten steel by the alloy to be added is determined according to the addition amount of the alloy to be added, the weight percentage of the carbon S element in the alloy to be added and the yield of the S element in the alloy to be added, and can be specifically realized by the formula (4):
in the formula (4), i is the kind of all the alloying elements to be added to the alloy, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon S element to be added to the alloy,
the yield of the S element to be added into the alloy is shown. Wherein the content of the first and second substances,
may be determined in advance from a composition table to be added to the alloy,
can be determined according to production experience data.
And after the weight percentage of the S element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the added alloy, the weight percentage of the S element in the molten steel after the initial smelting and the weight percentage of the S element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the S element in the molten steel is less than or equal to the total weight percentage a of the S element specified in the target component of the steelSThus, the quality of the product can be ensured.
S114, determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added;
after the addition amount of the alloy to be added is determined, the cost of the alloy to be added can be determined according to the addition amount of the alloy to be added and the current unit price of the alloy to be added, and the method can be specifically realized by a formula (5):
in the formula (5), the first and second groups,
the amount of the alloy to be added is,
for the current unit price of the alloy to be added, i is the kind of all alloying elements contained in the alloy to be added, and x is the alloy to be added.
S115, determining an alloy minimum cost control model according to the total weight percentage of C elements in the molten steel, the total weight percentage of P elements in the molten steel, the total weight percentage of S elements in the molten steel and the cost of the alloy to be added;
after the total weight percentage of the C element, the total weight percentage of the P element, the total weight percentage of the S element and the cost of the alloy to be added in the molten steel are determined, the alloy minimum cost control model can be determined according to the total weight percentage of the C element, the total weight percentage of the P element, the total weight percentage of the S element and the cost of the alloy to be added in the molten steel. Wherein, the alloy minimum cost control model is shown by a formula (6):
in combination with the above equations (2) to (5), the equation (6) may be expressed by the equation (7):
in the formula (6), the first and second groups,
is the least costly alloy of a plurality of alloys to be added, n is the number of all alloying elements contained in the alloy to be added, l is the number of the alloy species to be added, i is all alloying element species contained in the alloy to be added, x is the alloy to be added,
the cost of the alloy to be added;
is the weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of C element in the refined molten steel,
is the weight percentage of the C element brought into the molten steel by the alloy to be added,
is the weight percentage of the P element in the molten steel after the steel is smelted in the primary smelting furnace,
is the weight percentage of the P element in the refined molten steel,
the weight percentage of the P element brought into the molten steel by the alloy to be added is
Is the weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of the S element in the refined molten steel,
is the weight percentage of the S element brought into the molten steel by the alloy to be added, aCIs the weight percentage of C content in the target component of the steel grade, aPIs the weight percentage of the P content in the target component of the steel grade, aSIs the weight percentage of the S content in the target component of the steel grade.
S116, determining an alloy proportioning scheme added into the molten steel according to the alloy minimum cost control model;
after the alloy minimum cost control model is determined, the alloy minimum cost control model is linearly solved based on alloy elements in the steel type target components, and an alloy proportioning scheme added into the molten steel is determined. The alloy matching scheme determined in the way not only can ensure the content of alloy elements and the stable control of the elements; meanwhile, the content of carbon and impurity elements (C, P, S) is guaranteed not to exceed the composition requirement of steel grade, and the alloy cost can be controlled at the lowest cost.
Based on the same inventive concept, the invention also provides a device for reducing the alloy smelting cost, which is detailed in the second embodiment.
Example two
The embodiment provides a device for reducing the cost of smelting alloy, as shown in fig. 2, the device comprises: a first determining unit 21, a second determining unit 22, a third determining unit 23, a fourth determining unit 24, and a fifth determining unit 25; wherein the content of the first and second substances,
in order to ensure the product performance in steel production, some alloy elements need to be added into steel, and common alloy elements comprise Ni, Cu, Mo, Si, Mn, Cr, Al, Nb, V, Ti, Ca and the like. The addition of the alloy in the steel smelting process is divided into inert elements and easily-oxidizable elements according to the physical property characteristics of the alloy; combining a smelting process of 'primary smelting furnace smelting-refining-continuous casting', and alloying inert elements (Ni and Cu) in the primary smelting furnace smelting; the oxidizable elements (Si, Mn, Cr, Al, Nb, V, Ti, Ca, etc.) are alloyed after the primary smelting. When adding the relevant alloy elements, the addition is generally realized by adding the corresponding alloy; for example, if Mn element needs to be added, corresponding alloys such as silicon-manganese alloy, metal manganese, low-carbon ferromanganese, medium-carbon ferromanganese, or high-carbon ferromanganese can be added into the molten steel. It should be noted that each alloy includes many alloy elements, for example, the silicon-manganese alloy includes not only Mn element but also C, P, S, Si element.
In this step, when alloying the molten steel with a certain alloy (to-be-added alloy) according to the target components of the steel grade, the first determining unit 21 may determine the addition amount of the to-be-added alloy in each ton of steel according to the weight percentage of each alloy element in the molten steel after the steel grade is smelted in the primary smelting furnace, the weight percentage of each alloy element in the molten steel after refining, the weight percentage of each alloy element in the to-be-added alloy, and the yield of each alloy element in the to-be-added alloy, and may specifically be implemented by formula (1):
in the formula (1), the first and second groups,
the amount of said alloy to be added per ton of steel,
is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of each alloy element in the molten steel after refining,
is the weight percentage of each alloy element to be added into the alloy,
and in order to obtain the yield of each alloy element to be added into the alloy, x is the alloy to be added, and i is all alloy elements contained in the alloy to be added.
After alloying the molten steel, the impurity elements in the alloy inevitably can be brought into the molten steel, influence the target composition of molten steel, and the impurity elements generally include: C. p and S.
After alloying the steel, the second determining unit 22 further determines the weight percentage of the C element brought into the molten steel by the alloy to be added according to the adding amount of the alloy to be added, the weight percentage of the carbon C element in the alloy to be added, and the yield of the C element in the alloy to be added, which can be specifically realized by the formula (2):
in the formula (2), i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon C element in the alloy to be added,
the yield of the C element in the alloy to be added is shown. Wherein the content of the first and second substances,
may be determined in advance from a composition table to be added to the alloy,
can be determined according to production experience data.
And after the weight percentage of the C element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element brought into the molten steel by the added alloy, the weight percentage of the C element in the molten steel after the initial smelting and the weight percentage of the C element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the C element in the molten steel is less than or equal to the total weight percentage a of the C element specified in the target component of the steelCThus, the quality of the product can be ensured.
In the same way, after alloying the steel grade, the second determining unit 22 further determines the weight percentage of the P element brought into the molten steel by the alloy to be added according to the addition amount of the alloy to be added in each ton of steel, the weight percentage of the carbon P element in the alloy to be added, and the yield of the P element in the alloy to be added, which can be specifically realized by the formula (3):
in formula (3), i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon P element in the alloy to be added,
the yield of the P element in the alloy to be added is shown. Wherein the content of the first and second substances,
may be determined in advance from a composition table to be added to the alloy,
can be determined according to production experience data.
And after the weight percentage of the P element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the added alloy, the weight percentage of the P element in the molten steel after the initial smelting and the weight percentage of the P element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the P element in the molten steel is less than or equal to the total weight percentage a of the P element specified in the target component of the steelPThus, the quality of the product can be ensured.
In the same way, after alloying the steel grade, the second determining unit 22 further determines the weight percentage of the S element brought into the molten steel by the alloy to be added according to the addition amount of the alloy to be added to each ton of steel, the weight percentage of the carbon S element in the alloy to be added, and the yield of the S element in the alloy to be added, which can be specifically realized by the formula (4):
in the formula (4), i is the kind of the alloy element to be added to the alloy, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon S element to be added to the alloy,
the yield of the S element to be added into the alloy is shown. Wherein the content of the first and second substances,
may be determined in advance from a composition table to be added to the alloy,
can be determined according to production experience data.
And after the weight percentage of the S element brought into the molten steel by the added alloy is determined, determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the added alloy, the weight percentage of the S element in the molten steel after the initial smelting and the weight percentage of the S element in the molten steel after refining. In the molten steel after the final smelting, the total weight percentage of the S element in the molten steel is less than or equal to the total weight percentage a of the S element specified in the target component of the steelSThus is itThe quality of the product can be ensured.
After the addition amount of the alloy to be added is determined, the third determining unit 23 may determine the cost of the alloy to be added according to the addition amount of the alloy to be added and the current unit price of the alloy to be added, which may be specifically implemented by formula (5):
in the formula (5), the first and second groups,
the amount of the alloy to be added is,
for the current unit price of the alloy to be added, i is the kind of the alloying element contained in the alloy to be added, and x is the alloy to be added.
After the total weight percentage of the C element, the total weight percentage of the P element, the total weight percentage of the S element, and the cost of the alloy to be added in the molten steel are determined, the fourth determining unit 24 may determine the alloy minimum cost control model according to the total weight percentage of the C element, the total weight percentage of the P element, the total weight percentage of the S element, and the cost of the alloy to be added in the molten steel.
Wherein, the alloy minimum cost control model is shown by a formula (6):
in the formula (6), the first and second groups,
is the least cost alloy of a plurality of alloys to be added, n is the number of alloy elements to be added to the alloy, l is the number of the types of the alloys to be added, i is the type of the alloy elements contained in the alloy to be added, x is the alloy to be added,
the cost of the alloy to be added;
is the weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of C element in the refined molten steel,
is the weight percentage of the C element brought into the molten steel by the alloy to be added,
is the weight percentage of the P element in the molten steel after the steel is smelted in the primary smelting furnace,
is the weight percentage of the P element in the refined molten steel,
the weight percentage of the P element brought into the molten steel by the alloy to be added is
Is the weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of the S element in the refined molten steel,
is the weight percentage of the S element brought into the molten steel by the alloy to be added, aCIs the weight percentage of C content in the target component of the steel grade, aPIs the weight percentage of the P content in the target component of the steel grade, aSThe S content in the target component of the steel gradeIn percentage by weight.
After the alloy minimum cost control model is determined, the fifth determining unit 25 linearly solves the alloy minimum cost control model based on the alloy elements in the steel type target components to determine an alloy proportioning scheme added to the molten steel. The alloy matching scheme determined in the way not only can ensure the content of alloy elements and the stable control of the elements; meanwhile, the content of carbon and impurity elements (C, P, S) is guaranteed not to exceed the composition requirement of steel grade, and the alloy cost can be controlled at the lowest cost.
EXAMPLE III
In practical application, when the method provided by the first embodiment and the device provided by the second embodiment are used for alloying certain furnace molten steel in a certain steel mill, the following steps are realized:
in this step, according to the target components of the steel grade, when a certain alloy (to-be-added alloy) is used for alloying the molten steel, the addition amount of the alloy to be added in each ton of steel can be determined according to the weight percentage of each alloy element in the molten steel after the steel grade is smelted in the primary smelting furnace, the weight percentage of each alloy element in the molten steel after refining, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy, and the method can be specifically realized by the formula (1):
in the formula (1), the first and second groups,
the amount of said alloy to be added per ton of steel,
is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of each alloy element in the molten steel after refining,
is the weight percentage of each alloy element to be added into the alloy,
and in order to obtain the yield of each alloy element to be added into the alloy, x is the alloy to be added, and i is the type of the alloy element contained in the alloy to be added. The alloy to be added in this embodiment contains 15 kinds of alloy elements, and the kind of the alloy element is 9, that is, x is 15, and i is 9.
The weight percentages of all alloy elements in molten steel after steel is smelted in a primary smelting furnace are shown in table 1, and the weight percentages of all alloy elements in molten steel after refining are shown in table 2:
TABLE 1
TABLE 2
| Content (wt.) | C | Si | Mn | P | S | Alt |
| Refining the continuously cast components | 0.015 | 0.02 | 0.02 | 0.002 | -0.0080 | -0.015 |
The weight percentages of the alloy elements to be added to the alloy are shown in table 3:
TABLE 3
The yield and current unit price of the alloy elements in this example are shown in table 4:
TABLE 4
After alloying the molten steel, the impurity elements in the alloy inevitably can be brought into the molten steel, influence the target composition of molten steel, and the impurity elements generally include: C. p and S.
After alloying the steel, determining the weight percentage of the C element brought into the molten steel by the alloy to be added according to the addition amount of the alloy to be added into each ton of steel, the weight percentage of the C element in the alloy to be added and the yield of the C element in the alloy to be added, which can be specifically realized by a formula (2):
in the formula(2) Wherein i is the kind of the alloying element contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon C element in the alloy to be added,
the yield of the C element in the alloy to be added is shown. Wherein the content of the first and second substances,
may be determined in advance from the composition table (table 3) of the alloy to be added,
reference may be made to table 4.
In the same way, after alloying the steel grade, the weight percentage of the P element brought into the molten steel by the alloy to be added is determined according to the addition amount of the alloy to be added in each ton of steel, the weight percentage of the carbon P element in the alloy to be added and the yield of the P element in the alloy to be added, and can be specifically realized by a formula (3):
in formula (3), i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon P element in the alloy to be added,
the yield of the P element in the alloy to be added is shown. Wherein the content of the first and second substances,
may be determined in advance from the composition table (table 3) of the alloy to be added,
reference may be made to table 4.
After alloying the steel, determining the weight percentage of the S element brought into the molten steel by the alloy to be added according to the addition of the alloy to be added into each ton of steel, the weight percentage of the S element in the alloy to be added and the yield of the S element in the alloy to be added, and specifically realizing the alloying by a formula (4):
in the formula (4), i is the kind of the alloying element to be added to the alloy, x is the alloy to be added,
the amount of the alloy to be added is,
is the weight percentage of the carbon S element to be added to the alloy,
the yield of the S element to be added into the alloy is shown. Wherein the content of the first and second substances,
may be determined in advance from the composition table (table 3) of the alloy to be added,
reference may be made to table 4.
After the addition amount of the alloy to be added is determined, the cost of the alloy to be added can be determined according to the addition amount of the alloy to be added and the current unit price of the alloy to be added, and the method can be specifically realized by a formula (5):
in the formula (5), the first and second groups,
the amount of the alloy to be added is,
for the current unit price of the alloy to be added, i is the kind of all alloying elements contained in the alloy to be added (i ═ 1, 2, … … 9), and x is the alloy to be added (x ═ 1, 2, … … 15).
By the above pair of alloy costs
Calculated, combined with carbon element aCThe impurity element P, S is aP、aSThe minimum cost control models of different alloys are obtained by judging the conditions:
wherein i is the kind of all alloying elements contained in the alloy to be added, x is the alloy to be added,
the cost of the alloy to be added;
is the weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of C element in the refined molten steel,
is the weight percentage of C element brought into the molten steel by the alloy to be added,
is the weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of the P element in the refined molten steel,
is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
Is the weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace,
is the weight percentage of the S element in the refined molten steel,
is the weight percentage of the S element brought into the molten steel by the alloy to be added, aCIs the weight percentage of C content in the target component of the steel grade, aPIs the weight percentage of the P content in the target component of the steel grade, aSIs the weight percentage of the S content in the target component of the steel grade.
Here, the target composition of the steel grade is shown in table 5:
TABLE 5
| C | Si | Mn | P≤ | S≤ | Alt | Ni | Cu | Cr | Mo | Nb | Ti |
| 0.060 | 0.25 | 1.60 | 0.012 | 0.0020 | 0.035 | 0.10 | 0.15 | 0.15 | 0.15 | 0.055 | 0.1 |
Solving the alloy minimum cost control model, and adopting 15 alloys and 9 alloy elements in the table 4 to carry out linear solving:
taking i in the model as Mn element as an example, the number x of the types of Mn-containing alloy to be added is 5, the types of the alloys 1, 2, 3, 4 and 5 are respectively silicon-manganese alloy, metal manganese alloy, low-carbon manganese-iron alloy, medium-carbon manganese-iron alloy and high-carbon manganese-iron alloy,
the amount of each of the 5 alloys added is based on the carbon element aCThe impurity element P, S is aP、aSIn combination with the current unit price of each alloy containing Mn element in the above 5
Determining the cost of each alloy to be added
Whether the tapping water meets the control requirement of the impurity elements can be judged by solving, and under the condition of meeting the control requirement of the impurity elements, the tapping water is controlled according to the control requirement of the impurity elements
Determining the types of the alloys with lower cost to obtain the type of the alloy with the optimal cost ratio of the manganese element.
The proportions of other alloy elements are determined in the same manner as the Mn element, and finally an optimal alloy proportion scheme is obtained by solving a cost control model, as shown in Table 6:
TABLE 6
| Kind of alloy | Alloy consumption (kg/t steel) | Alloy price (Yuan/kg) | Alloy cost (Yuan/t steel) |
| Silicon iron | 3.37 | 7.47 | 25.17 |
| Low-carbon ferromanganese | 20.41 | 11.76 | 240.02 |
| Pure aluminium | 1.40 | 15.03 | 21.04 |
| Aluminum iron | 4.00 | 11.42 | 45.68 |
| Low-carbon ferrochrome | 2.26 | 12.60 | 28.48 |
| Nickel plate | 1.01 | 93.70 | 94.64 |
| Copper plate | 1.52 | 47.91 | 72.82 |
| Ferromolybdenum | 2.64 | 10.98 | 28.99 |
| Ferrocolumbium | 0.85 | 21.87 | 18.59 |
| High titanium ferrotitanium | 0.25 | 33.81 | 8.45 |
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A method for reducing the cost of smelting an alloy, the method comprising:
determining the addition amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in refined molten steel, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy;
after alloying the steel grade, determining the total weight percentage of the C element in the molten steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after smelting in a primary smelting furnace and the weight percentage of the C element in the molten steel after refining;
determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the P element in the molten steel after refining;
determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining;
determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added;
determining an alloy minimum cost control model according to the total weight percentage of C elements in the molten steel, the total weight percentage of P elements in the molten steel, the total weight percentage of S elements in the molten steel and the cost of the alloy to be added;
determining an alloy proportioning scheme added into the molten steel according to the alloy minimum cost control model; wherein the alloy minimum cost control model comprises:
n is the number of alloy elements to be added into the alloy, l is the number of the alloy types to be added, i is the alloy element types to be added into the alloy, x is the alloy to be added, and
for the cost of the alloy to be added, the
For a plurality of alloys to be added with the lowest cost, said
The weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of C element in the refined molten steel
The weight percentage of the C element brought into the molten steel by the alloy to be added is
The weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the P element in the refined molten steel
Is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
The weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the S element in the refined molten steel
Is the weight percentage of the S element brought into the molten steel by the alloy to be added, the aCIs the weight percentage of C element in the target component of the steel grade, the aPIs the weight percentage of P element in the target component of the steel grade, the aSIs the weight percentage of the S element in the target component of the steel grade.
2. The method of claim 1, wherein the determining the amount of the alloy to be added per ton of steel according to the weight percentage of the alloy elements in the molten steel after the steel is smelted in the primary smelting furnace, the weight percentage of the alloy elements in the molten steel after refining, the weight percentage of the alloy elements to be added in the alloy and the yield of the alloy elements to be added in the alloy comprises:
according to the formula
Determining the amount of said alloy to be added per ton of steel
Wherein the content of the first and second substances,
a is aiIs the weight percentage of each alloy element in the target components of the steel grade
Is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace, wherein
Is the weight percentage of each alloy element in the molten steel after refining
Is the weight percentage of each alloy element in the alloy to be added, the
And in order to obtain the yield of each alloy element in the alloy to be added, x is the alloy to be added, and i is the alloy element type contained in the alloy to be added.
3. The method of claim 1, wherein before determining the total weight percent of the C elements in the molten steel according to the weight percent of the C elements to be added into the molten steel, the weight percent of the C elements in the molten steel after the initial smelting, and the weight percent of the C elements in the molten steel after the refining, the method comprises:
according to the formula
Determining the weight percentage of the C element brought into the molten steel by the alloy to be added
Wherein i is the kind of the alloying element to be added into the alloy, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of carbon C element in the alloy to be added, the
The yield of the C element in the alloy to be added is shown.
4. The method of claim 1, wherein before determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting, and the weight percentage of the P element in the molten steel after refining, the method comprises:
according to the formula
Determining the weight percentage of the P element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of the carbon P element in the alloy to be added, the
The yield of the P element in the alloy to be added is shown.
5. The method of claim 1, wherein before determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting, and the weight percentage of the S element in the molten steel after refining, the method comprises:
according to the formula
Determining the weight percentage of the S element brought into the molten steel by the alloy to be added
Wherein i is the kind of the alloying element to be added into the alloy, x is the alloy to be added, and
in the amount of the alloy to be added, the
For said alloy to be addedThe weight percentage of the medium carbon S element, said
The yield of the S element in the alloy to be added is shown.
6. The method of claim 1, wherein determining the cost of the alloy to be added based on the amount of alloy to be added and the current unit price of the alloy to be added comprises:
according to the formula
Determining the cost of the alloy to be added
Wherein, the
In the amount of the alloy to be added, the
And for the current unit price of the alloy to be added, i is the kind of the alloy element contained in the alloy to be added, and x is the alloy to be added.
7. An apparatus for reducing the cost of smelting an alloy, the apparatus comprising:
the first determining unit is used for determining the adding amount of the alloy to be added in each ton of steel according to the weight percentage of each alloy element in molten steel after the steel is smelted in a primary smelting furnace, the weight percentage of each alloy element in refined molten steel, the weight percentage of each alloy element to be added in the alloy and the yield of each alloy element to be added in the alloy;
the second determining unit is used for determining the total weight percentage of the C element in the molten steel after alloying the steel according to the weight percentage of the C element to be added into the molten steel, the weight percentage of the C element in the molten steel after primary smelting and the weight percentage of the C element in the molten steel after refining;
determining the total weight percentage of the P element in the molten steel according to the weight percentage of the P element brought into the molten steel by the alloy to be added, the weight percentage of the P element in the molten steel after primary smelting and the weight percentage of the P element in the molten steel after refining;
determining the total weight percentage of the S element in the molten steel according to the weight percentage of the S element brought into the molten steel by the alloy to be added, the weight percentage of the S element in the molten steel after primary smelting and the weight percentage of the S element in the molten steel after refining;
the third determining unit is used for determining the cost of the alloy to be added according to the adding amount of the alloy to be added and the current unit price of the alloy to be added;
a fourth determining unit, configured to determine an alloy minimum cost control model according to the total weight percentage of the C element in the molten steel, the total weight percentage of the P element in the molten steel, the total weight percentage of the S element in the molten steel, and the cost of the alloy to be added;
a fifth determining unit, configured to determine an alloy proportioning scheme added to the molten steel according to the alloy minimum cost control model; wherein the alloy minimum cost control model comprises:
n is the number of alloy elements to be added into the alloy, l is the number of the alloy types to be added, i is the alloy element types contained in the alloy to be added, x is the alloy to be added, and
for the cost of the alloy to be added, the
For a plurality of alloys to be added with the lowest cost, said
The weight percentage of the C element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of C element in the refined molten steel
The weight percentage of the C element brought into the molten steel by the alloy to be added is
The weight percentage of the P element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the P element in the refined molten steel
Is the weight percentage of the P element brought into the molten steel by the alloy to be added, the
The weight percentage of the S element in the molten steel after the steel is smelted by a primary smelting furnace is as follows
Is the weight percentage of the S element in the refined molten steel
Is the weight percentage of the S element brought into the molten steel by the alloy to be addedRatio of (a) toCIs the weight percentage of the C content in the target component of the steel grade, the aPIs the weight percentage of the P content in the target component of the steel grade, the aSIs the weight percentage of the S content in the target component of the steel grade.
8. The apparatus of claim 7, wherein the first determining unit is specifically configured to:
according to the formula
Determining the amount of said alloy to be added per ton of steel
Wherein the content of the first and second substances,
a is aiIs the weight percentage of each alloy element in the target components of the steel grade
Is the weight percentage of each alloy element in the molten steel after the steel is smelted by a primary smelting furnace, wherein
Is the weight percentage of each alloy element in the molten steel after refining
Is the weight percentage of each alloy element in the alloy to be added, the
And i is the yield of each alloy element in the alloy to be added, and i is the type of the alloy element contained in the alloy to be added.
9. The apparatus of claim 7, wherein the second determination unit is further to:
according to the formula
Determining the weight percentage of the C element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of carbon C element in the alloy to be added, the
The yield of the C element in the alloy to be added is shown.
10. The apparatus of claim 7, wherein the second determination unit is further to:
according to the formula
Determining the weight percentage of the S element brought into the molten steel by the alloy to be added
Wherein i is the kind of alloy element contained in the alloy to be added, x is the alloy to be added, and
in the amount of the alloy to be added, the
Is the weight percentage of the carbon S element in the alloy to be added, the
The yield of the S element in the alloy to be added is shown.
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| CN112609121A (en) * | 2020-12-07 | 2021-04-06 | 攀钢集团西昌钢钒有限公司 | Method for reducing steel-making Mn alloying cost |
| CN113549811B (en) * | 2021-07-21 | 2022-08-26 | 攀钢集团攀枝花钢钒有限公司 | Steel-making alloy adding method |
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