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A method for preparing high-carbon ferromanganese by gas-based reduction of ferromanganese oxide

A technology of ferromanganese oxide and high-carbon ferromanganese, which is applied in the field of iron and steel metallurgy to achieve the effects of shortened reduction roasting time, strong reduction ability and reduced energy consumption

Active Publication Date: 2018-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, the gas-based reduction of manganese oxide ore is mainly carried out by using reducing gases CO, H 2 , SO 2 et al. have studied the pre-reduction of high-valent manganese oxides to acid-soluble MnO, but there are few reports on the preparation of ferromanganese alloys by gas-based direct reduction of manganese oxide ore.

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  • A method for preparing high-carbon ferromanganese by gas-based reduction of ferromanganese oxide

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Effect test

Embodiment 1

[0027] The analytically pure ferric oxide and manganese dioxide are mixed according to the mass ratio of 40:100. The mass percentages of ferric oxide and manganese dioxide -200 mesh particle size are both 90%, and 1% is added Bentonite and 7.5% moisture were pelletized, then dried, and the dried samples were placed in CH 4 10% by volume, H 2 Volume percentage 30%, CO volume percentage 10%, N 2 Carry out roasting in the atmosphere of 50% volume percent, roasting temperature 1150 ℃, roasting time is 120min, then in N 2 After being cooled to room temperature in the atmosphere, the high-carbon ferromanganese product can be obtained. The composition of the obtained product is that the Fe content is 19.25%, the manganese content is 73.08%, and the carbon content is 7.67% (to meet the requirement that the carbon content of high-carbon ferromanganese is not more than 8%) ). The optical microstructure picture of the high carbon ferromanganese obtained under this condition is as foll...

Embodiment 2

[0029] The analytically pure iron ferric oxide and manganese dioxide are mixed according to the mass ratio of 5:100. The mass percentages of ferric iron tetroxide and manganese dioxide -200 mesh particle size are both 88%, and 0.5% is added Humic acid and 7% moisture after pelleting, and then dried, the dried sample in CH 4 8% by volume, H 2 Volume percentage 62%, CO volume percentage 20%, N 2 Carry out roasting in the atmosphere of 10% by volume, the roasting temperature is 1300 ℃, the roasting time is 30min, then in N 2 After being cooled to room temperature in the atmosphere, the high-carbon ferromanganese product can be obtained. The composition of the obtained product is 8% Fe content, 85.2% manganese content, and 6.8% carbon content (to meet the requirement that the carbon content of high-carbon ferromanganese is not more than 8%) ).

Embodiment 3

[0031] The pure mineral ferric oxide and manganese oxide are mixed according to the mass ratio of 25:100. The mass percentage of ferric oxide and manganese oxide-200 mesh particle size is 90%, and 0.5% is added Humic acid and 7% moisture after pelleting, and then dried, the dried sample in CH 4 20% by volume, H 2 Volume percentage 60%, CO volume percentage 12%, N 2Roasting in an atmosphere with a volume percentage of 8%, the calcination temperature is 1250°C, the calcination time is 90min, and then cooled to room temperature in an Ar atmosphere, the high-carbon ferromanganese product can be obtained. The composition of the obtained product is Fe content 22.3%, manganese The carbon content is 71.2%, and the carbon content is 6.5% (meeting the requirement that the carbon content of high-carbon ferromanganese is not more than 8%).

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Abstract

The invention discloses a method for preparing high-carbon ferromanganese through gas-based reduction of ferromanganese oxide. The method comprises the following steps: uniformly mixing manganese oxide, ferric oxide, an adhesive and water, then agglomerating and drying, placing the obtained dry blocks in a mixed atmosphere containing H2, CH4, CO and N2, and roasting to obtain a high-carbon ferromanganese product. Compared with a traditional high-temperature smelting method, the method has the characteristics of being low in reaction temperature and short in time, greatly reduces the production cost, and facilitates realization of industrialized production.

Description

technical field [0001] The invention relates to a method for preparing high-carbon ferromanganese, in particular to a method for preparing high-carbon ferromanganese by gas-based reduction of ferromanganese oxide, belonging to the field of iron and steel metallurgy. Background technique [0002] Manganese is an important strategic substance for modern industrial production and development. 90% to 95% of manganese is used in the iron and steel industry, 30% of which are used as desulfurization and deoxidizers in metallurgical processes, and 70% are used as alloying elements in iron and steel materials. Manganese can strengthen ferrite and refine pearlite in steel, and improve The strength of steel, so it is known as "there is no steel without manganese"; 5% to 10% of manganese is consumed in nonferrous metallurgy, chemical industry, electronics, batteries, agriculture and other departments. In short, manganese plays a very important role in the national economy. [0003] As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C22/00C22C1/00C22C35/00
CPCC22C1/00C22C22/00C22C35/00
Inventor 姜涛张元波刘兵兵李光辉苏子键彭志伟范晓慧黄柱成郭宇峰杨永斌李骞陈许玲甘敏徐斌张鑫杜明辉陈迎明刘继成欧阳学臻
Owner CENT SOUTH UNIV
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