Manganese oxide direct-alloying steel making process

A technology of alloying steelmaking and manganese oxide, which is applied in the field of metal materials, can solve problems such as environmental pollution, long process flow, and high cost, and achieve the effects of reducing production costs, reducing environmental pollution, and reducing production costs

Inactive Publication Date: 2004-01-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When manganese-containing ferroalloying is used, the process is mature, and the recovery rate of manganese is high and stable, but manganese ore needs to be smelted into manganese-containing ferroalloy, so the energy consumption is high, the process is long, the cost is high,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0009] Embodiment 1: Alloying Q235 steel with manganese alloy pellets. It is implemented on a 25t converter, the ladle is 35t, and the steel output per furnace is 30t. The manganese alloy pellets contain 34.5% of manganese. To increase manganese by 0.4%, 12.88Kg of manganese alloy pellets per ton of steel needs to be added. A total of 386kg of manganese alloy pellets are added to each furnace. 130Kg is added to the empty ladle before tapping, and the remaining 256Kg is added during tapping. Add on the tapping side until the molten steel reaches 2 / 3 of the ladle, which is about 20t. Then enter the argon blowing station to blow argon and stir for 3-4 minutes. The implementation results show that: ton of steel reduces costs: 4.21 yuan / ton. The recovery rate of manganese is 90-95%. The quality of molten steel is comparable to molten steel alloyed with manganese-iron alloy. Embodiment 2: Alloying 20MnSi steel with manganese alloy pellets. To increase manganese by 1.35%, 43.47Kg of mang...

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PUM

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Abstract

The present invention relates to a steel-smelting process by adopting manganese element alloying process, which is characterized by that in the manganese oxide the reductant, heating agent and catalyst can be added, they are broken and ground into powder material with 50-200 meshes, then uniformly mixed and mixed with adhesive to obtain the manganese alloy pelletizing. In the course of tapping from electric furnace or converter the manganese alloy pelletizing can be added into molten steel in batches, then the high temp. of molten steel can be used to melt the manganese oxide and reduce and reduce it into metal manganese to directly make the molten steel be alloyed, at the same time said invention utilizes the argon-blowing or other refining modes to raise and stabilize recover rate of manganese.

Description

Technical field: [0001] The invention belongs to the field of metal materials, and in particular relates to a steelmaking process for manganese element alloying. Background technique: [0002] At present, manganese-containing ferroalloys such as ferromanganese and ferrosilicon manganese are generally used for manganese alloying in steelmaking. Manganese alloying is carried out during tapping. There is also manganese ore (that is, manganese oxide) added before tapping in the steelmaking furnace for manganese alloying. When manganese-containing ferroalloy is used, the process is mature, and the recovery rate of manganese is high and stable, but manganese ore needs to be smelted into manganese-containing ferroalloy, so the energy consumption is high, the process is long, the cost is high, and the environmental pollution is serious. When alloying with manganese ore in a steelmaking furnace, the recovery rate of manganese is low, only 50-60%, and the manganese oxide slag corrode...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C33/06
Inventor 吴光亮李士琦
Owner UNIV OF SCI & TECH BEIJING
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