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Chromium-iron mineral powder sintering method for stainless steel production

A technology for sintering treatment and chromite, which is applied in the fields of metallurgical engineering technology and environmental protection and energy conservation, can solve the problems of high energy consumption of sintering, unfavorable energy saving and emission reduction, and achieves good air permeability, reduces energy consumption of sintering, and improves yield and strength. Effect

Inactive Publication Date: 2013-04-17
CHONGQING UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a sintering treatment method for chromite fines used in the production of stainless steel, to improve the sintering effect of chromite fines, reduce carbon consumption, and reduce energy consumption. To solve the problems of high energy consumption and unfavorable energy saving and emission reduction in the sintering of chromite fine ore in the prior art

Method used

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  • Chromium-iron mineral powder sintering method for stainless steel production
  • Chromium-iron mineral powder sintering method for stainless steel production
  • Chromium-iron mineral powder sintering method for stainless steel production

Examples

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Embodiment

[0029] This embodiment adopts the method of the present invention to carry out three groups of chromite powder ore sintering experiments, and also adopts the method of adding flux in the prior art to carry out two groups of chromite ore powder ore sintering experiments, and then compares the sintering experiments of each group of chromite ore powder ores The physical indicators of the sintered ore products obtained in the experiment. The chemical composition of the coke powder used in this embodiment is shown in Table 1, and the chemical composition of other raw materials is shown in Table 2:

[0030] Table 1 Chemical composition of coke powder

[0031]

[0032] Table 2 Chemical Parts of Raw Materials

[0033]

[0034] In this example, 5 groups of chromite powder ore sintering experiments were carried out, respectively numbered as 1# group, 2# group, 3# group, 4# group, 5# group, 6# group, 7# group, and 8# group Wherein 1#~6# group chromite powder ore sintering experim...

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Abstract

The invention provides a chromium-iron mineral powder sintering method for stainless steel production. According to the chromium-iron mineral powder sintering method, pelletization and sintering are carried out after laterite is added to chromium-iron mineral powder; as the laterite and water have good wetting property, the laterite serving as nucleation particles and the chromium-iron mineral powder adhere to each other and grow, and then are pelletized and clustered in a pelletization process, thus solving the problem that the chromium-iron mineral powder is difficult in pelletizaiton; simultaneously, the sintering temperature of chromite can be reduced due to the addition of the laterite, the amount of a liquid phase is increased, the energy consumption is reduced, the rate of finished product and the strength of a sinter are increased, and the problems of difficulty in sintering of the chromium-iron mineral powder, high content of mixed carbon and high energy consumption in the prior art are solved; as compositions of the laterite are similar to that of a smelting slag system, follow-up smelting and slagging working procedures for stainless steel production are not added, the price is relatively low, and the total cost of the stainless steel production can be effectively reduced; and the chromium-iron mineral powder sintering method has the advantages of increasing the economic benefits of enterprises and relieving the energy saving and emission reduction pressure of the enterprises.

Description

technical field [0001] The invention relates to the fields of metallurgical engineering technology and environmental protection and energy saving technology, in particular to a sintering treatment method for chromite powder ore used for stainless steel production. Background technique [0002] my country's steel production ranks first in the world, and the demand and production capacity of stainless steel have also increased significantly. At present, about 65% to 70% of the stainless steel used in the world is austenitic stainless steel. Chromium-nickel stainless steel accounts for two-thirds of the world's stainless steel production. In order to ensure the inherent corrosion resistance of stainless steel, the steel must contain more than 16% chromium and more than 8% nickel. Chromium and nickel are the basic additions for the production of stainless steel. my country needs to produce a large amount of ferrochrome and ferronickel every year. Since my country's chromium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 吕学伟陈攀郭恩光向花亮邓晓东袁秋刚刘梅
Owner CHONGQING UNIV
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