Method and device for controlling disqualification of end point after oxygen blowing of converter, equipment and medium

Abstract

The invention relates to a method and a device for controlling unqualified end point after converter oxygen blowing, equipment and a medium, in particular to the field of steelmaking, and the method comprises the following steps: according to test end point phosphorus and test end point carbon of molten steel after converter oxygen blowing, controlling the flow of converter blowing, the position of an air gun and blowing time to obtain molten steel with qualified end point phosphorus and end point carbon; gas used in converter blowing comprises inert gas; and if the test end point phosphorus is larger than the qualified end point phosphorus and the test end point carbon is larger than the qualified end point carbon and smaller than or equal to 0.3%, the blowing flow of the converter is controlled to be 17000-20000 m < 3 > / h, the position of an air gun is 0.9-1.2 m, and the blowing time is 30-60 s. According to the control method provided by the invention, the reblowing dephosphorization process is controlled when the end point phosphorus is unqualified after converter smelting, so that the reduction of carbon in the dephosphorization process can be avoided under the condition that the end point phosphorus is qualified, thereby ensuring that the end point phosphorus of the converter meets the steel grade tapping requirement and the end point carbon meets the control target.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steelmaking, in particular to a control method and device, equipment and medium for controlling the end point of semi-steel after converter oxygen blowing, and more particularly to a control method and device, equipment and medium for realizing phosphorus reduction and carbon preservation by blowing gas when the end point phosphorus and carbon of semi-steel after converter oxygen blowing are unqualified. BACKGROUND

[0002] The characteristics of semi-steel are low silicon and low carbon. The carbon of semi-steel is about 1.0% lower than that of molten iron. The low carbon of semi-steel is a key influencing factor for controlling the lower end point C. The end point C target of general steel is controlled at 0.08-0.15%. If it is lower than 0.05%, it is a more serious over-oxidation. The over-oxidized steel slag is difficult to distinguish in the tapping process, which often leads to judgment failure and the phenomenon of back phosphorus by slag.

[0003] CN105002325A discloses a smelting control method for low-carbon low-silicon steel. The method process is as follows: (1) the molten iron is treated by extracting vanadium, and the carbon content of the obtained semi-steel is 3.40-3.90wt%, and the silicon content is ≤0.02wt%; (2) the semi-steel is blown, and the carbon content detected by the vice gun is 0.20-0.30wt%, and the silicon content is ≤0.01wt%, and the oxygen supply is continued for 2-6m 3 / t; (3) after the blowing is finished, the gun is raised, the furnace is emptied, and the slag is poured, then magnesium material is added, and the oxygen supply is supplemented for 3-6m 3 / t, and the oxygen is controlled at 800-1000ppm; (4) the tapping molten steel is refined in the LF furnace, the slag basicity is adjusted to 4.0-6.0, and the ALs is 0.010-0.015wt%; and the refining is finished, and the tapping is performed.

[0004] However, when producing low-phosphorus steel, the end point P requirement is generally low. The oxygen supplement needs to control the P at a qualified level, and oxygen supplement is performed for phosphorus removal. After the phosphorus removal by supplement, the end point C does not meet the control target. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide a control method and device, equipment and medium for controlling the end point after converter oxygen blowing, so as to solve the defect that when the end point phosphorus of converter smelting is unqualified and the phosphorus removal by supplement is performed, the end point phosphorus meets the standard, but the end point carbon cannot meet the standard.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a control method for the end point after converter oxygen blowing, which comprises:

[0008] According to the converter blowing gas flow Q, the gas gun position H and the blowing time T controlled by the test end point phosphorus Pcst and the test end point carbon Ccst of the molten steel after the converter blowing oxygen, the molten steel with qualified end point phosphorus and end point carbon is obtained;

[0009] The gas used in the converter blowing gas includes inert gas;

[0010] If the test end point phosphorus Pcst is greater than the qualified end point phosphorus Phgr and the qualified end point carbon Chgr is less than the test end point carbon Ccst and Ccst is less than or equal to 0.3%, the converter blowing gas flow Q is controlled to be 17000-20000 m 3 / h, the gas gun position H is controlled to be 0.9-1.2 m, and the blowing time T is controlled to be 30-60 s.

[0011] The control method provided by the application can avoid the reduction of carbon in the dephosphorization process when the end point phosphorus after the converter smelting is unqualified, so that the end point phosphorus of the converter can meet the tapping requirements of the steel grade, and the end point carbon can meet the control target.

[0012] As a preferred technical solution of the application, if the test end point phosphorus Pcst is greater than or equal to 0.035% and the test end point carbon Ccst is 0.2%≤Ccst≤0.3%, the converter blowing gas flow Q is controlled to be 19000 m 3 / h≤Q≤20000 m 3 / h, the gas gun position H is controlled to be 1 m

[0013] As a preferred technical solution of the application, if the test end point phosphorus Pcst is greater than or equal to 0.035% and the test end point carbon Ccst is the qualified end point carbon Chgr 3 / h≤Q≤20000 m 3 / h, the gas gun position H is controlled to be 1.1 m

[0014] As a preferred technical solution of the application, if the test end point phosphorus Pcst is 0.025%≤Pcst 3 / h≤Q 3 / h, the gas gun position H is controlled to be 1 m

[0015] As a preferred technical scheme of the present application, when the test end point phosphorus Pcst is Phgr < Pcst < 0.025% and the test end point carbon Ccst is 0.1% ≤ Ccst ≤ 0.2%, the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 50 s ≤ T ≤ 60 s.

[0016] As a preferred technical scheme of the present application, when the test end point phosphorus Pcst is Phgr < Pcst < 0.025% and the test end point carbon Ccst is Chgr ≤ Ccst < 0.1%, the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 0.9 m ≤ H ≤ 1 m, and the blowing time T is 30 s ≤ T ≤ 40 s.

[0017] In a second aspect, the present application provides a control device for a converter end point after oxygen blowing, the control device comprising:

[0018] a test module for testing the molten steel after the converter oxygen blowing to obtain a test end point phosphorus Pcst and a test end point carbon Ccst;

[0019] a control module for controlling the flow rate Q of the converter blowing, the air gun position H and the blowing time T according to the test end point phosphorus Pcst and the test end point carbon Ccst of the molten steel after the converter oxygen blowing to obtain molten steel with qualified end point phosphorus and end point carbon.

[0020] As a preferred technical scheme of the present application, the control process of the control module comprises:

[0021] when the test end point phosphorus Pcst is ≥ 0.035% and the test end point carbon Ccst is 0.2% ≤ Ccst ≤ 0.3%, the flow rate Q of the converter blowing is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 40 s ≤ T ≤ 60 s.

[0022] when the test end point phosphorus Pcst is ≥ 0.035% and the test end point carbon Ccst is Chgr < Ccst < 0.2%, the flow rate Q of the converter blowing is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1.1 m < H ≤ 1.2 m, and the blowing time T is 40 s ≤ T ≤ 60 s.

[0023] When the test end point phosphorus Pcst is 0.025%≤Pcst<0.035% and the test end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter gas blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m<H≤1.1m, and the blowing time T is 40s≤T≤50s.

[0024] When the test end point phosphorus Pcst is 0.025%≤Pcst<0.035% and the test end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter gas blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m<H≤1.1m, and the blowing time T is 40s≤T≤50s.

[0025] When the test end point phosphorus Pcst is 0.025%≤Pcst<0.035% and the test end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter gas blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m<H≤1.1m, and the blowing time T is 40s≤T≤50s.

[0026] In a third aspect, the present application provides an electronic device, which comprises:

[0027] at least one processor; and a memory connected to the at least one processor in communication;

[0028] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the control method of the first aspect.

[0029] In a fourth aspect, an embodiment of the present application provides a computer storage medium, which stores computer executable instructions, and the computer executable instructions are executed by a processor to implement the control method of the first aspect.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] The control method provided by the present application matches and links the gas flow rate, the air gun working gun position height and the blowing time after the converter smelting, so that the dephosphorization and carbon preservation can be effectively realized when the dephosphorization agent such as lime is not additionally added, the slag cost is reduced, and the converter steel material consumption is reduced. Attached Figure Description

[0032] Figure 1 This is a flowchart of a method for controlling the failure of the endpoint after oxygen blowing in a converter, as provided in an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of a control device for the failure of the endpoint after oxygen blowing in a converter, provided in an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of an electronic device provided in an embodiment of the present invention.

[0035] In the picture:

[0036] 100 - Test module, 200 - Control module;

[0037] 10-Electronic device, 11-Processor, 12-ROM, 13-RAM, 14-Bus, 15-I / O interface, 16-Input unit, 17-Output unit, 18-Storage unit, 19-Communication unit.

[0038] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0039] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0040] I. This embodiment provides a method for controlling the non-compliance of the endpoint after oxygen blowing in a converter. The process is as follows: Figure 1 As shown, the control method includes:

[0041] Based on the test endpoints of phosphorus (Pcst) and carbon (Ccst) in the molten steel after oxygen blowing in the converter, the flow rate Q of the converter gas, the position H of the gas lance, and the blowing time T are controlled to obtain molten steel with qualified endpoint phosphorus and carbon.

[0042] The gas used in the converter blowing includes inert gas;

[0043] If the test endpoint phosphorus Pcst > the qualified endpoint phosphorus Phgr and the qualified endpoint carbon Chgr < the test endpoint carbon Ccst ≤ 0.3%, then the converter blowing gas flow rate Q should be controlled at 17000-20000 m³ / s. 3 / h, the air gun position H is 0.9-1.2m, and the blowing time T is 30-60s.

[0044] In this invention, once the flow rate Q of the converter gas and the position H of the gas gun are controlled to reach the blowing time T, semi-steel with the required final phosphorus and final carbon content can be obtained.

[0045] In the present application, inert gas refers to nitrogen, helium, neon and the like.

[0046] In the present application, the position H of the air gun refers to the distance from the liquid surface in the molten steel at the outlet of the air gun.

[0047] In the present application, the test end point phosphorus Pcst, the test end point carbon Ccst, the qualified end point phosphorus Phgr and the qualified end point carbon Chgr are all mass percentage indicators.

[0048] In the present application, the test end point phosphorus Pcst and the test end point carbon Ccst refer to the end point phosphorus content and the end point carbon content of the molten steel obtained after the air blowing of the converter.

[0049] In the present application, the qualified end point phosphorus Phgr and the qualified end point carbon Chgr refer to the design requirement end point phosphorus content and the end point carbon content of the molten steel obtained when the target steel is smelted in the converter.

[0050] In the present application, the flow rate Q of the air blowing of the converter is 17000-20000 m 3 / h, for example, it can be 17000 m 3 / h, 17200 m 3 / h, 17400 m 3 / h, 17600 m 3 / h, 17800 m 3 / h, 18000 m 3 / h, 18200 m 3 / h, 18400 m 3 / h, 18600 m 3 / h, 18800 m 3 / h, 19000 m 3 / h, 19200 m 3 / h, 19400 m 3 / h, 19600 m 3 / h, 19800 m 3 / h or 20000 m 3 / h, but not limited to the listed values, other unlisted values within the range also meet the requirements.

[0051] In the present application, the position H of the air gun is 0.9-1.2 m, for example, it can be 0.9 m, 0.92 m, 0.94 m, 0.96 m, 0.98 m, 1 m, 1.02 m, 1.04 m, 1.06 m, 1.08 m, 1.1 m, 1.12 m, 1.14 m, 1.16 m, 1.18 m or 1.2 m, but not limited to the listed values, other unlisted values within the range also meet the requirements.

[0052] In the present application, the blowing time T is 30-60s, for example, it can be 30s, 32s, 34s, 36s, 38s, 40s, 42s, 44s, 46s, 48s, 50s, 52s, 54s, 56s, 58s or 60s, etc., but not limited to the listed values, other unlisted values within the range are also required.

[0053] Wherein, the test end point phosphorus Pcst is: ≥0.035% and the test end point carbon Ccst is: 0.2%≤Ccst≤0.3%, the flow rate Q of the converter blowing is controlled to be 19000m 3 / h≤Q≤20000m 3 / h, the air gun position H is 1m<H≤1.1m, the blowing time T is 40s≤T≤60s; the test end point phosphorus Pcst may be, for example, 0.035%, 0.036%, 0.038%, 0.04%, 0.042%, 0.044%, 0.046%, 0.048% or 0.05%, etc., the test end point carbon Ccst may be, for example, 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29% or 0.3%, etc., the flow rate Q of the converter blowing may be, for example, 19000m 3 / h, 19100m 3 / h, 19200m 3 / h, 19300m 3 / h, 19400m 3 / h, 19500m 3 / h, 19600m 3 / h, 19700m 3 / h, 19800m 3 / h, 19900m 3 / h or 20000m 3 / h, etc., the air gun position H may be, for example, 1.01m, 1.02m, 1.03m, 1.04m, 1.05m, 1.06m, 1.07m, 1.08m, 1.09m or 1.1m, etc., the blowing time T may be, for example, 40s, 42s, 44s, 46s, 48s, 50s, 52s, 54s, 56s, 58s or 60s, etc., but not limited to the listed values, other unlisted values within the range are also required.

[0054] Wherein, the test end point phosphorus Pcst is: ≥0.035% and the test end point carbon Ccst is: qualified end point carbon Chgr<Ccst<0.2%, the flow rate Q of the converter blowing is controlled to be 19000m 3 / h≤Q≤20000m 3 / h, the lance position H is 1.1 m < H ≤ 1.2 m, and the blowing time T is 40 s ≤ T ≤ 60 s; the test end point phosphorus Pcst may be, for example, 0.035%, 0.036%, 0.038%, 0.04%, 0.042%, 0.044%, 0.046%, 0.048%, or 0.05%, etc., the test end point carbon Ccst may be, for example, 0.19%, 0.18%, 0.16%, 0.14%, 0.12%, or 0.1%, etc., the flow rate Q of the converter blowing may be, for example, 19000 m 3 / h, 19100 m 3 / h, 19200 m 3 / h, 19300 m 3 / h, 19400 m 3 / h, 19500 m 3 / h, 19600 m 3 / h, 19700 m 3 / h, 19800 m 3 / h, 19900 m 3 / h, or 20000 m 3 / h, etc., the lance position H may be, for example, 1.11 m, 1.12 m, 1.13 m, 1.14 m, 1.15 m, 1.16 m, 1.17 m, 1.18 m, 1.19 m, or 1.2 m, etc., the blowing time T may be, for example, 40 s, 42 s, 44 s, 46 s, 48 s, 50 s, 52 s, 54 s, 56 s, 58 s, or 60 s, etc., but is not limited to the listed values, and other unlisted values within the range are also acceptable.

[0055] wherein the test end point phosphorus Pcst is 0.025% ≤ Pcst < 0.035% and the test end point carbon Ccst is 0.2% ≤ Ccst ≤ 0.3%, the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the lance position H is 1 m < H ≤ 1.1 m, and the blowing time T is 40 s ≤ T ≤ 50 s; the test end point phosphorus Pcst may be, for example, 0.025%, 0.026%, 0.028%, 0.03%, 0.032%, 0.034%, or 0.35%, etc., the test end point carbon Ccst may be, for example, 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, 0.25%, 0.26%, 0.27%, 0.28%, 0.29%, or 0.3%, etc., the flow rate Q of the converter blowing may be, for example, 17000 m 3 / h, 17200 m 3 / h, 17400 m 3 / h, 17600 m 3 / h, 17800 m3 / h, 18000m 3 / h, 18200m 3 / h, 18400m 3 / h, 18600m 3 / h, 18800m 3 / h, or 18900m 3 / h, etc., the air gun position H may be, for example, 1.01m, 1.02m, 1.03m, 1.04m, 1.05m, 1.06m, 1.07m, 1.08m, 1.09m, or 1.1m, etc., and the blowing time T may be, for example, 40s, 42s, 44s, 46s, 48s, or 50s, etc., but is not limited to the listed values, and other unlisted values within the range are also acceptable.

[0056] wherein the test end point phosphorus Pcst is: 0.01%≤Pcst≤0.025%, and the test end point carbon Ccst is: 0.1%≤Ccst≤0.2%, the flow rate Q of the converter blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m 3 / h, 17200m 3 / h, 17400m 3 / h, 17600m 3 / h, 17800m 3 / h, 18000m 3 / h, 18200m 3 / h, 18400m 3 / h, 18600m 3 / h, 18800m 3 / h, or 18900m 3 / h, the lance position H can be, for example, 1.01 m, 1.02 m, 1.03 m, 1.04 m, 1.05 m, 1.06 m, 1.07 m, 1.08 m, 1.09 m, or 1.1 m, etc., and the blowing time T can be, for example, 50 s, 51 s, 52 s, 53 s, 54 s, 55 s, 56 s, 57 s, 58 s, 59 s, or 60 s, etc., but is not limited to the listed values, and other unlisted values within the range are also acceptable.

[0057] wherein the test endpoint phosphorus Pcst is: 0.01% < Pcst < 0.025% and the test endpoint carbon Ccst is: 0.09% < Ccst < 0.1%, the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h < Q < 19000 m 3 / h, the lance position H is 0.9 m < H < 1 m, and the blowing time T is 30 s < T < 40 s; the test endpoint phosphorus Pcst can be, for example, 0.01%, 0.012%, 0.014%, 0.016%, 0.018%, 0.02%, 0.022%, 0.024%, or 0.025%, etc., the test endpoint carbon Ccst can be, for example, 0.09%, 0.08%, 0.07%, 0.06%, or 0.05%, etc., and the flow rate Q of the converter blowing can be, for example, 17000 m 3 / h, 17200 m 3 / h, 17400 m 3 / h, 17600 m 3 / h, 17800 m 3 / h, 18000 m 3 / h, 18200 m 3 / h, 18400 m 3 / h, 18600 m 3 / h, 18800 m 3 / h, or 18900 m 3 / h, the lance position H can be, for example, 0.9 m, 0.91 m, 0.92 m, 0.93 m, 0.94 m, 0.95 m, 0.96 m, 0.97 m, 0.98 m, 0.99 m, or 1 m, etc., and the blowing time T can be, for example, 30 s, 31 s, 32 s, 33 s, 34 s, 35 s, 36 s, 37 s, 38 s, 39 s, or 40 s, etc., but is not limited to the listed values, and other unlisted values within the range are also acceptable.

[0058] Secondly, the embodiment provides a control device for a converter oxygen blowing end point unqualified, as shown in Figure 2 The control device comprises:

[0059] A testing module 100 is configured to test the molten steel after the oxygen blowing of the converter to obtain a testing end point phosphorus Pcst and a testing end point carbon Ccst;

[0060] A control module 200 is configured to control the flow rate Q of the converter blowing gas, the position H of the gas gun and the blowing time T of the converter according to the testing end point phosphorus Pcst and the testing end point carbon Ccst of the molten steel after the oxygen blowing of the converter to obtain the molten steel with qualified end point phosphorus and end point carbon.

[0061] The control process of the control module comprises:

[0062] When the testing end point phosphorus Pcst is ≥0.035% and the testing end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter blowing gas is controlled to be 19000m 3 / h≤Q≤20000m 3 / h, the position H of the gas gun is 1m<H≤1.1m, and the blowing time T of the converter is 40s≤T≤60s.

[0063] When the testing end point phosphorus Pcst is ≥0.035% and the testing end point carbon Ccst is qualified end point carbon Chgr<Ccst<0.2%, the flow rate Q of the converter blowing gas is controlled to be 19000m 3 / h≤Q≤20000m 3 / h, the position H of the gas gun is 1.1m<H≤1.2m, and the blowing time T of the converter is 40s≤T≤60s.

[0064] When the testing end point phosphorus Pcst is 0.025%≤Pcst<0.035% and the testing end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter blowing gas is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the position H of the gas gun is 1m<H≤1.1m, and the blowing time T of the converter is 40s≤T≤50s.

[0065] When the testing end point phosphorus Pcst is qualified end point phosphorus Phgr<Pcst<0.025% and the testing end point carbon Ccst is 0.1%≤Ccst≤0.2%, the flow rate Q of the converter blowing gas is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the position H of the gas gun is 1m<H≤1.1m, and the blowing time T of the converter is 50s≤T≤60s.

[0066] When the testing end point phosphorus Pcst is qualified end point phosphorus Phgr<Pcst<0.025% and the testing end point carbon Ccst is qualified end point carbon Chgr≤Ccst<0.1%, the flow rate Q of the converter blowing gas is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 0.9m≤H≤1m, and the blowing time T is 30s≤T≤40s.

[0067] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0068] III. This embodiment provides an electronic device intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0069] like Figure 3 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An I / O interface 15 is also connected to the bus 14.

[0070] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0071] The processor 11 can be various general and / or special purpose processing components having processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the aforementioned control method for a converter blow oxygen end point unqualification.

[0072] In some embodiments, the aforementioned control method for a converter blow oxygen end point unqualification can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of the aforementioned control method for a converter blow oxygen end point unqualification described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the aforementioned control method for a converter blow oxygen end point unqualification by any other appropriate means, such as by means of firmware.

[0073] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0074] Computer programs used to implement the methods of the application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed by the processor of the machine, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0075] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0076] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0077] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), blockchain network, and the Internet.

[0078] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server is one of communication and distribution, with the client requesting a service that is accessible via the server, and the server providing some data in response to the request. The server can be cloud server, also known as cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0079] The server provided by the embodiment comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor implements the control method for the off-specification converter end point after oxygen blowing when executing the program.

[0080] Unless specifically stated otherwise, terms such as processing, computing, calculating, determining, displaying, and the like, can refer to an action and / or process of one or more processing or computing systems, or similar devices, that manipulate and / or transform data represented as physical (e.g., electronic) quantities within the processing system's registers and / or memories into other data similarly represented as physical quantities within the processing system's memories, registers or other such information storage, transmission or display devices. Information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0081] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0082] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. In the alternative, the processor and the storage medium can reside as discrete components in a user terminal.

[0083] For a software implementation, the techniques described in this disclosure can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes can be stored in memory units and executed by processors. The memory unit can be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.

[0084] IV. To illustrate the effect that the control method for the end point of the converter blowing oxygen can achieve, the following actual example is used for illustration, which is as follows:

[0085] Embodiment 1

[0086] The embodiment provides a specific control process for the end point of the converter blowing oxygen, which is as follows:

[0087] The target steel smelting of the embodiment is to obtain 42CrMo steel (converter end point P≤0.017%, C: 0.08%-0.15%). After the converter blowing oxygen dephosphorization, the test end point phosphorus of the obtained molten steel is 0.032%, and the test end point carbon is 0.26%. Compared with the requirements of the steel, it is found that the end point phosphorus and the end point carbon do not meet the requirements. Therefore, nitrogen is supplemented, at this time, the flow rate Q of the converter blowing gas is controlled to be 18000 m 3 / h, the gas gun position H is 1.05 m, and the blowing time T is 45 s. After the blowing is completed, the end point phosphorus in the obtained semi-steel is 0.015%, and the end point carbon is 0.13%. Compared with the target requirements of the converter smelting, it is found that the target requirements are met.

[0088] Embodiment 2

[0089] The embodiment provides a specific control process for the end point of the converter blowing oxygen, which is as follows:

[0090] The target steel smelting of this embodiment is to obtain 42CrMo steel (converter endpoint P≤0.017%, C: 0.08%-0.15%). After oxygen blowing dephosphorization in the converter, the test endpoint phosphorus of the obtained molten steel is 0.036%, and the test endpoint carbon is 0.25%. Compared with the requirements of the steel, it is found that the endpoint phosphorus and endpoint carbon do not meet the requirements. Therefore, nitrogen is supplemented, at this time the flow rate Q of the converter blowing gas is controlled to be 19500m 3 / h, the gas gun position H is 1.05m, and the blowing time T is 50s. After the blowing is completed, the endpoint phosphorus in the obtained semi-steel is 0.012%, and the endpoint carbon is 0.09%. Compared with the target requirements of the converter smelting, it is found that the target requirements are met.

[0091] Embodiment 3

[0092] This embodiment provides a specific control process of the blowing gas after the endpoint of the converter oxygen blowing is unqualified, which is specifically as follows:

[0093] The target steel smelting of this embodiment is to obtain 42CrMo steel (converter endpoint P≤0.017%, C: 0.08%-0.15%). After oxygen blowing dephosphorization in the converter, the test endpoint phosphorus of the obtained molten steel is 0.039%, and the test endpoint carbon is 0.18%. Compared with the requirements of the steel, it is found that the endpoint phosphorus and endpoint carbon do not meet the requirements. Therefore, nitrogen is supplemented, at this time the flow rate Q of the converter blowing gas is controlled to be 19800m 3 / h, the gas gun position H is 1.15m, and the blowing time T is 50s. After the blowing is completed, the endpoint phosphorus in the obtained semi-steel is 0.011%, and the endpoint carbon is 0.12%. Compared with the target requirements of the converter smelting, it is found that the target requirements are met.

[0094] Embodiment 4

[0095] This embodiment provides a specific control process of the blowing gas after the endpoint of the converter oxygen blowing is unqualified, which is specifically as follows:

[0096] The target steel smelting of this embodiment is to obtain 42CrMo steel (converter endpoint P≤0.017%, C: 0.08%-0.15%). After oxygen blowing dephosphorization in the converter, the test endpoint phosphorus of the obtained molten steel is 0.02%, and the test endpoint carbon is 0.19%. Compared with the requirements of the steel, it is found that the endpoint phosphorus and endpoint carbon do not meet the requirements. Therefore, nitrogen is supplemented, at this time the flow rate Q of the converter blowing gas is controlled to be 18000m 3 / h, the gas gun position H is 1.05m, and the blowing time T is 55s. After the blowing is completed, the endpoint phosphorus in the obtained semi-steel is 0.012%, and the endpoint carbon is 0.08%. Compared with the target requirements of the converter smelting, it is found that the target requirements are met.

[0097] Embodiment 5

[0098] The embodiment provides a specific control process of blowing after the end point of oxygen blowing of a converter is unqualified, and is as follows:

[0099] In the embodiment, the target smelted steel is 20CrMnTiH steel (the end point P of the converter is ≤0.015%, and the end point C is 0.03%-0.05%), after oxygen blowing dephosphorization of the converter, the test end point phosphorus of the obtained molten steel is 0.02%, and the test end point carbon is 0.09%, and compared with the requirement of the steel, it is found that the end point phosphorus and the end point carbon do not meet the requirement, so nitrogen is supplemented, at this time, the flow rate Q of the converter blowing is controlled to be 18000 m 3 / h, the position H of the air gun is 0.9 m, and the blowing time T is 40 s, after the blowing is completed, the end point phosphorus in the obtained semi-steel is 0.012%, and the end point carbon is 0.05%, and compared, it is found that the target requirement of the converter smelting is reached.

[0100] Comparative example 1

[0101] The difference from the embodiment 1 is that the position H of the air gun is controlled to be 0.8 m.

[0102] In the embodiment, when the position of the air gun is unqualified, the end point C is less than 0.08%, and the effect of the application cannot be achieved.

[0103] Comparative example 2

[0104] The difference from the embodiment 1 is that the position H of the air gun is controlled to be 1.5 m.

[0105] In the embodiment, when the position of the air gun is unqualified, the end point P is greater than 0.017%, and the effect of the application cannot be achieved.

[0106] Comparative example 3

[0107] The difference from the embodiment 1 is that the flow rate Q of the converter blowing is controlled to be 15000 m 3 / h.

[0108] In the embodiment, when the flow rate of blowing is unqualified, the end point P of the converter is greater than 0.017%, and the effect of the application cannot be achieved.

[0109] Comparative example 4

[0110] The difference from the embodiment 1 is that the flow rate Q of the converter blowing is controlled to be 22000 m 3 / h.

[0111] In the embodiment, when the flow rate of blowing is unqualified, the end point C is less than 0.08%, and the effect of the application cannot be achieved.

[0112] Comparative example 5

[0113] The difference from the embodiment 1 is that the blowing time is 20 s.

[0114] In the embodiment, when the blowing time is not up to the standard, the end point P of the converter is greater than 0.017%, and the effect of the application cannot be achieved.

[0115] Comparative Example 6

[0116] The difference from Example 1 is that the blowing time is 90s.

[0117] In the embodiment, when the blowing time is not up to the standard, the end point C is less than 0.08%, and the effect of the application cannot be achieved.

[0118] In summary, the control method provided by the application can effectively achieve dephosphorization and carbon preservation during the dephosphorization by controlling the gas flow of the post-blown dephosphorization of the converter, the working gun height of the air gun and the blowing time, without adding additional dephosphorization agents such as lime, thereby reducing the cost of slag and the consumption of steel materials in the converter.

[0119] The preferred embodiments of the application are described in detail above, but the application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the application within the technical concept of the application, and these simple modifications all belong to the protection scope of the application.

[0120] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the application will not further describe various possible combinations.

[0121] In addition, various different embodiments of the application can also be combined in any manner, as long as they do not deviate from the technical concept of the application, and they should also be considered as disclosed by the application.

Claims

1. A method of controlling a converter blow oxygen end point failure, characterized by, The control method comprises: The control method comprises: The control method comprises: If the test end point phosphorus Pcst > qualified end point phosphorus Phgr and qualified end point carbon Chgr < test end point carbon Ccst ≤ 0.3%, the flow rate Q of the converter blowing is controlled to be 17000-20000 m 3 / h, the air gun position H is 0.9-1.2 m, and the blowing time T is 30-60 s.

2. The control method according to claim 1, characterized by, The flow rate Q of the converter blowing is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 40 s ≤ T ≤ 60 s.

3. The control method according to claim 1, characterized by, The flow rate Q of the converter blowing is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1.1 m < H ≤ 1.2 m, and the blowing time T is 40 s ≤ T ≤ 60 s.

4. The control method according to claim 1, characterized by, The test end point phosphorus Pcst is: 0.025%≤Pcst<0.035% and the test end point carbon Ccst is: 0.2%≤Ccst≤0.3%, the flow rate Q of the converter blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m<H≤1.1m, and the blowing time T is 40s≤T≤50s.

5. The control method according to claim 1, characterized by, The test end point phosphorus Pcst is: qualified end point phosphorus Phgr < Pcst < 0.025% and the test end point carbon Ccst is: 0.1% ≤ Ccst ≤ 0.2%, then the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 50 s ≤ T ≤ 60 s.

6. The control method according to claim 1, characterized by, The test end point phosphorus Pcst is: qualified end point phosphorus Phgr < Pcst < 0.025% and the test end point carbon Ccst is: qualified end point carbon Chgr ≤ Ccst < 0.1%, then the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 0.9 m ≤ H ≤ 1 m, and the blowing time T is 30 s ≤ T ≤ 40 s.

7. A control device for unqualified endpoint after oxygen blowing in a converter, characterized in that, The control method comprises: The control method comprises: The control method comprises:

8. The control device of claim 7, wherein The control method comprises: The test end point phosphorus Pcst is ≥ 0.035% and the test end point carbon Ccst is 0.2% ≤ Ccst ≤ 0.3%, then the flow rate Q of the converter blowing is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 40 s ≤ T ≤ 60 s. The test end point phosphorus Pcst is ≥ 0.035% and the test end point carbon Ccst is qualified end point carbon Chgr < Ccst < 0.2%, then the flow rate Q of blowing gas of the converter is controlled to be 19000 m 3 / h ≤ Q ≤ 20000 m 3 / h, the air gun position H is 1.1 m < H ≤ 1.2 m, and the blowing time T is 40 s ≤ T ≤ 60 s. The test end point phosphorus Pcst is 0.025%≤Pcst<0.035% and the test end point carbon Ccst is 0.2%≤Ccst≤0.3%, the flow rate Q of the converter blowing is controlled to be 17000m 3 / h≤Q<19000m 3 / h, the air gun position H is 1m<H≤1.1m, and the blowing time T is 40s≤T≤50s. The test end point phosphorus Pcst is: qualified end point phosphorus Phgr < Pcst < 0.025% and the test end point carbon Ccst is: 0.1% ≤ Ccst ≤ 0.2%, then the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 1 m < H ≤ 1.1 m, and the blowing time T is 50 s ≤ T ≤ 60 s. The test end point phosphorus Pcst is: qualified end point phosphorus Phgr < Pcst < 0.025% and the test end point carbon Ccst is: qualified end point carbon Chgr ≤ Ccst < 0.1%, then the flow rate Q of the converter blowing is controlled to be 17000 m 3 / h ≤ Q < 19000 m 3 / h, the air gun position H is 0.9 m ≤ H ≤ 1 m, and the blowing time T is 30 s ≤ T ≤ 40 s.

9. An electronic device, comprising: The control method comprises: The control method comprises: The control method comprises:

10. A computer storage medium, characterized in that, The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises: The control method comprises:

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