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Method for producing low carbon ferromanganese

A technology of low-carbon ferromanganese and carbon manganese, which is applied in the field of smelting low-carbon ferromanganese, can solve the problems that it is difficult to produce low-carbon ferromanganese and micro-carbon ferrochromium, and achieve high voltage, fast desiliconization speed and low loss Effect

Inactive Publication Date: 2008-08-27
潘保良 +1
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Problems solved by technology

However, due to the limitations of the raw materials used, it is difficult to produce low-carbon ferromanganese and micro-carbon ferrochrome

Method used

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  • Method for producing low carbon ferromanganese

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Embodiment Construction

[0024] The technical solutions of the present invention are described in further detail below through examples.

[0025] Technical scheme of the present invention is made of following method steps:

[0026] 1. Preparation of Mn 3 o 4 . According to manganese oxide ore: liquid phase reducing agent: sulfuric acid = 1: 0.1-0.2: 0.5-0.6 (weight ratio), mix manganese oxide ore and liquid phase reducing agent such as molasses or starch, leach with sulfuric acid, add alkali to precipitate and remove iron, and wash , to prepare Mn 3 o 4 . Its chemical composition is: Mn≥69%, Fe≤0.05%, P≤0.05%, S≤0.03%, Sn≤0.001%, Pb≤0.001%.

[0027] 2. Raw material preparation. Ferrosilicon is crushed to a particle size of ≤20mm, quicklime containing CaO≥85% is crushed to a particle size of 8-50mm, and artificially synthesized Mn 3 o 4 pelletized and dried;

[0028] 3. Smelting low silicon manganese silicon alloy

[0029] Furnace charge ratio according to ferrosilicon: Mn 3 o 4 Pellets: l...

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Abstract

The invention relates to a method for producing low carbon ferromanganese, which comprises the following steps: utilizing man-made Mn3O4, utilizing silicon iron to be reducing agent, deacidizing Mn3O4 to produce low-silicon manganese silicon alloy in a refining electric furnace, and then adding the manganese silicon alloy in a medium frequency furnace, and further producing low carbon ferromanganese through utilizing Mn3O4 pellet and lime refining desiliconisation. Since the invention adopts man-made Mn3O4 and silicon iron, therefore, the low carbon ferromanganese which is prepared has little impurity and low carbon content amount of silicon iron, and carbon content of low carbon ferromanganese which is smelted is less than 0.3%. Since a medium frequency furnace has electromagnetic mixing, therefore desiliconisation is more thoroughly, production cost is low, and product quality is stable.

Description

1. Technical field [0001] The invention relates to the technical field of smelting low-carbon ferromanganese, especially the use of artificial Mn 3 o 4 Low-carbon manganese-silicon alloy is smelted in the refining electric furnace, and then this manganese-silicon alloy is blended into the intermediate frequency furnace for further use of Mn 3 o 4 A method for producing low-carbon ferromanganese by desiliconization of pellets and lime refining. 2. Background technology [0002] In recent years, low-carbon high-strength steel, stainless steel, stainless steel electrodes, and low-carbon high-strength steel electrodes have developed rapidly, and the demand for low-carbon manganese-silicon alloys and low-carbon ferromanganese has increased significantly. Traditional manganese-silicon alloys are smelted and produced in submerged arc furnaces by electric carbothermal method. It reduces C by increasing the Si content in the alloy, which is a traditional technology and is very ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22B3/08
Inventor 潘保良奚基平陈明葵
Owner 潘保良
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