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Loading control method for converter high alloy steel scrap
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A control method and alloy technology, which is applied in the direction of manufacturing converters, improving process efficiency, etc., can solve the problems such as the narrow application range of steel types, and achieve the effects of reducing the consumption of smelting alloys, rationally utilizing secondary metal resources, and broadening prospects for promotion
Active Publication Date: 2014-07-02
BAOSHAN IRON & STEEL CO LTD
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[0007] Some other known patented technical solutions, for example, the patent number is "CN201110354275.1", the invention name is "a device and method for extracting impuritymetal elements for electric furnace steelmaking scrap preheating", and the patent number is "CN201210047966.1 ", and the patented technical schemes titled "Smelting D-type GraphiteAlloyCast Iron Glass Mold Using Scrap Steel Instead of Pig Iron" do not involve how to calculate the maximum amount of high-alloy scrap steel that can replace ordinary alloys based on the alloy content requirements of the target steel type And the amount of other common alloys such as copper plates, etc., the scope of its steel type is narrow
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Embodiment 1
[0077] Stove number=2
[0078] Tapping sequence number=225758
[0079] Target steel type = AK334211, the content requirements of alloy elements in the target steel type are [Cu]=0.00%, [Ni]=0.15%, [Cr]=0.00%, [Mo]=0.00%.
[0080] The target steel output of this furnace is WTsteel = 300 tons, and the main raw material calculation model calculates the total target amount of steel scrap = 48.08 tons.
[0081] Add the nickel-containing scrap steel (heavy steel scrap) code-named 1288, its parameters are [Ni]=0.65%, iron content=98%, then:
[0082] WTscrap_ni=[(WTsteel×TGni)÷SCni]÷RTscrap
[0083] =[(300×0.0015)÷0.0065]÷0.98≈70.64 tons
[0084] According to the regulation that the heavy scrap ratio (the ratio of (heavy) high-alloy scrap added to the total scrap target) does not exceed 50%, take WTscrap_ni=24 tons.
[0085] Add the calculation formula of common alloy (nickel plate):
[0092] The target steel grade = XM382312, and the alloy element content requirements in the steel grade target are [Cu]=0.00%, [Ni]=0.13, [Cr]=1.00%, [Mo]=0.22%.
[0093] The target steel output of this furnace is WTsteel = 300 tons, and the main raw material calculation model calculates the total target amount of steel scrap = 49.18 tons.
[0094] plan 1:
[0095] Add the nickel-chromium-molybdenum steel scrap (heavy steel scrap) code-named 1272, whose parameters are [Ni]=1.08%, [Mo]=0.3%, and iron content=98%. Due to the high content of [Ni] in the scrap steel, it is calculated according to the [Ni] element content of the target steel grade:
[0096] WTscrap_ni=[(WTsteel×TGni)÷SCni]÷RTscrap
[0097] =[(300×0.0013)÷0.0108]÷0.98≈36.85 tons
[0098] According to the regulation that the heavy waste ratio does not exceed 50%, take WTscrap_ni=24.59 tons.
[0099] (1) Calculation formula for adding common alloy ...
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Abstract
A loading control method for converter high alloy steel scrap is characterized by comprising the following steps: (1) according to the type of steel and a target tapping weight of the converter, calculating a total target weight of the steel scrap added to the converter (WTscrap); (2) determining whether the steel type has high alloy content requirement; if no, converting to matching calculation of ordinary steel scrap and adding the steel scrap; and if yes, entering a the next step (3); (3) calculating and feeding back the addition amount of high alloy in the total target weight of the steel scrap, and determining whether the addition amount of high alloy steel in the total target weight of steel scrap of the steel type satisfies the requirements; and (4) if yes, converting to matching calculation of ordinary steel scrap and adding the steel scrap; and if no, then conducting calculation of ordinary alloy addition amount, and adding the ordinary alloy until it meets the requirements. According to the invention, on the promise of guaranteeing molten steel composition control, consumption cost of ordinary alloy is reduced.
Description
technical field [0001] The invention relates to the field of metallurgical converter production control, in particular, the invention relates to a method for controlling the loading of converter high-alloy steel scrap during the converter smelting process. Background technique [0002] In the process of converter steelmaking, it is often necessary to add one or several alloying elements to meet the specification requirements of the steelmaking type. Especially when smelting high-alloy steel, the amount of ferroalloy added is relatively large. Due to the presence of precious metal elements, ferroalloys tend to be more expensive and account for a larger proportion of steelmaking production costs. In order to reduce alloy consumption, some scrap steel with high alloy content (hereinafter referred to as "high alloy scrap steel") can be loaded into the converter before blowing, so as to reduce the input amount of alloy and reduce the cost of alloy use. [0003] There are many t...
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