Non-electric furnace aluminum heating mode manganese alloying method for ultra-high manganese steel
A manganese alloying and ultra-high manganese technology, applied in the field of metallurgy, can solve the problems of poor dynamic conditions of electric furnace or intermediate frequency furnace, long manganese alloying cycle, poor composition uniformity, etc., to achieve shortened smelting cycle, short smelting cycle, high heat sufficient effect
Inactive Publication Date: 2021-02-02
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology
[0003] The biggest problem in the smelting and production of high manganese steel is manganese alloying. The traditional process adopts electric furnace or intermediate frequency furnace to complete manganese alloying. In a 100-ton electric furnace, 30-40 tons of electrolytic manganese need to be added to make the manganese content of molten steel reach 20-25%. Manganese alloying period is long, manganese yield is poor, cost is high, and the dynamic conditions of electric furnace or intermediate frequency furnace are poor, resulting in poor fluidity of molten steel and poor composition uniformity
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[0022] The technical solutions in the embodiments of the present invention are clearly and completely described below, obviously, the described embodiments are only some embodiments of the present invention, not all implementation examples.
[0023] In order to achieve the purpose, the present invention specifically adopts the following technical solutions.
[0024] A method for manganese alloying of ultra-high manganese steel in non-electric furnace aluminum heating mode, comprising the following steps:
[0025] Process flow: molten iron pretreatment→main decarburization and heating→primary manganese alloying→deoxidation→secondary manganese alloying→reduction→slag removal→qualified manganese alloyed molten steel→LF→continuous casting.
[0026] In the molten iron pretreatment, the initial carbon content of the dephosphorized molten iron is generally 2.8%-3.5%, the initial temperature is generally between 1350°C-1400°C, and the dephosphorization treatment of the blast furnace m...
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The invention belongs to the technical field of metallurgy, and particularly relates to a non-electric furnace aluminum heating mode manganese alloying method for ultra-high manganese steel. The invention provides the non-electric furnace aluminum heating mode manganese alloying method for the ultra-high manganese steel. The method utilizes chemical heat generated by an oxidation exothermic reaction of oxygen and a large amount of alloy elements such as silicon iron, aluminum particles and the like to replace electric heat of an electric furnace to melt manganese alloy in the process of rapiddecarburization under excellent dynamic conditions of a converter and oxygen blowing in the converter process. According to the technology, the current situation that manganese alloying of the ultra-high manganese steel can only be completed through an electric furnace or an intermediate frequency furnace for a long time is changed, and the problems that in the electric furnace manganese alloyingprocess of a traditional technology, the melting time period of a large number of manganese alloys is long, molten steel uniformity is poor, the manganese yield is poor, and cost is high are solved.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for manganese alloying of ultra-high manganese steel in a non-electric furnace aluminum heating mode. Background technique [0002] High manganese steel also has the excellent welding performance of carbon steel, high strength and high elongation of stainless steel, non-magnetic, deformation induction and other characteristics, high manganese steel for building sound insulation, high manganese non-magnetic steel for transformers, high manganese steel for ultra-low temperature pressure vessels As a representative of high manganese steel, it has become a global research hotspot. The manganese content in high manganese steel is between 20-25%, and the content of chromium and nickel is replaced by manganese content. High manganese steel is stainless steel in carbon steel. [0003] The biggest problem in the smelting and production of high manganese steel is ma...
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IPC IPC(8): C21C1/02C21C7/068C21C7/06C21C5/28C22C33/06
CPCC21C1/02C21C5/28C21C7/0006C21C7/005C21C7/06C21C7/068C22C33/06
Inventor 杨新龙李振钢秦俊山潘吉祥姜军陈开锋陈兴润胡桓璋阮加增张建龙叶红钢莫志斌
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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