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Mn-Fe composite pellet and preparation method thereof

A technology of composite pellets and ferromanganese, which is applied in the production of manganese-based alloy raw materials, can solve the problems of lower furnace grade, high ferromanganese ratio, power consumption, and unsatisfactory economic and technical indicators of recovery rate, etc., so as to improve the furnace grade , Reduce the weight ratio of ferromanganese and reduce power consumption

Active Publication Date: 2012-03-07
云南文山斗南锰业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing raw materials (such as manganese concentrate and primary ore), the manganese-iron ratio is high (generally greater than 9), and a certain amount of iron ore must be added in the production process, and the addition of iron ore will lead to a decrease in the furnace grade, resulting in Various economic and technical indicators such as power consumption and recovery rate are not ideal

Method used

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  • Mn-Fe composite pellet and preparation method thereof
  • Mn-Fe composite pellet and preparation method thereof
  • Mn-Fe composite pellet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In the mixing mill, 40 parts by weight of magnetically separated fine ore concentrate, 20 parts by weight of magnetically separated manganese-rich ore powder, 30 parts by weight of dust collection ash, 10 parts by weight of ferromanganese ore powder, and 1.5 parts by weight of bonding The powder and appropriate amount of water were mixed and milled for 6 minutes to obtain a solid powder mixture. Then, in the briquetting machine, the solid powder mixture was briquetted at a briquetting roller speed of 6 rpm and an inter-roll pressure of 5 MPa to obtain wet pellets. Finally, in a drying kiln, the wet pellets were dried at 200 degrees Celsius for 3 hours to obtain ferromanganese composite pellets. Tested by a dynamometer, the compressive strength of the composite pellets was 36MPa, indicating that the quality of the pellets was qualified.

Embodiment 2

[0049] In the mixing mill, 40 parts by weight of magnetically separated fine ore concentrate, 20 parts by weight of magnetically separated manganese-rich ore powder, 30 parts by weight of dust collection ash, 10 parts by weight of ferromanganese ore powder, and 2 parts by weight of sticky The binder and an appropriate amount of water were mixed and milled for 7 minutes to obtain a solid powder mixture. Then, in the briquetting machine, the solid powder mixture was briquetted at a briquetting roller speed of 8 rpm and an inter-roll pressure of 4 MPa to obtain wet pellets. Finally, in a drying kiln, the wet pellets were dried at 180 degrees Celsius for 2.5 hours to obtain ferromanganese composite pellets. Tested by a dynamometer, the compressive strength of the composite pellets was 38MPa, indicating that the quality of the pellets was qualified.

Embodiment 3

[0051] In the mixing mill, 40 parts by weight of magnetically separated fine ore concentrate, 20 parts by weight of magnetically separated manganese-rich ore powder, 30 parts by weight of dust collection ash, 10 parts by weight of ferromanganese ore powder, and 2.5 parts by weight of sticky The binder and an appropriate amount of water were mixed and milled for 8 minutes to obtain a solid powder mixture. Then, in the briquetting machine, the solid powder mixture was briquetted at a briquetting roller speed of 9 rpm and an inter-roll pressure of 7 MPa to obtain wet pellets. Finally, in a drying kiln, the wet pellets were dried at 210 degrees Celsius for 5 hours to obtain ferromanganese composite pellets. The compressive strength of the composite pellets was 40MPa after testing by a dynamometer, indicating that the quality of the pellets was qualified.

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Abstract

The invention discloses a Mn-Fe composite pellet and a preparation method thereof. The Mn-Fe composite pellet comprises, by weight, 27.68% of Mn, 5.37% of Fe, 0.09% of P, 9.86% of SiO2, 11.7% of CaO and 4.42% of Mg, wherein the Mn / Fe weight ratio is 5.15:1, and the compressive strength of the Mn-Fe composite pellet is 35-45MPa. According to embodiments in the invention, the reduction of the Mn / Feweight ratio of the composite pellet allows the charged grade to be improved, so the Mn recovery rate is improved and the power consumption is reduced.

Description

technical field [0001] The invention relates to the field of production of manganese-based alloy raw materials, in particular to a ferromanganese composite pellet and a preparation method thereof. Background technique [0002] In the production of manganese-based alloys (such as high-carbon ferromanganese), there are strict requirements for the content of each component in high-carbon ferromanganese. For example, in high-carbon ferromanganese FeMn78C8.0, the weight percentage of Mn is greater than 75%, and the ratio of manganese to iron (Mn / Fe) is 7.18. However, in the existing raw materials (such as manganese concentrate and primary ore), the manganese-iron ratio is high (generally greater than 9), and a certain amount of iron ore must be added in the production process, and the addition of iron ore will lead to a decrease in the furnace grade, resulting in Various economic and technical indicators such as power consumption and recovery rate are not ideal. Contents of th...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22C22/00C22C1/00C22C35/00
Inventor 马文清王运正江朝文高德云吕达海杭祖辉孙仲春蔡德鸿赵辉然李传云孙广元
Owner 云南文山斗南锰业股份有限公司
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