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Method for sintering chromite powder recycled based on ferronickel smelting furnace slag

A technology for sintering treatment and chromite ore, applied in the direction of improving process efficiency, can solve the problems of unfavorable energy saving and emission reduction, high energy consumption of sintering, and achieve the effects of realizing waste utilization, improving economic benefits and reducing overall costs

Inactive Publication Date: 2014-05-07
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a sintering treatment method for chromite fines based on ferronickel smelting slag recovery, which improves the sintering effect of chromite fines, reduces carbon consumption, and reduces energy consumption. consumption, in order to solve the problem of high energy consumption in sintering of chromite fine ore in the prior art, which is not conducive to energy saving and emission reduction

Method used

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  • Method for sintering chromite powder recycled based on ferronickel smelting furnace slag
  • Method for sintering chromite powder recycled based on ferronickel smelting furnace slag
  • Method for sintering chromite powder recycled based on ferronickel smelting furnace slag

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Embodiment

[0033] 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 coke powder adopted in this embodiment is shown in Table 1, and the chemical composition of other raw materials is shown in Table 2:

[0034] Table 1

[0035]

[0036] Table 2

[0037]

[0038] 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, and 5# group, of which 1#~3# group chromite powder ore The sintering experiment adopts the chromite ore powder ore sintering treatment method of the present invention to...

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Abstract

The invention provides a method for sintering chromite powder recycled based on ferronickel smelting furnace slag. According to the method, the chromite powder is added with the ferronickel smelting furnace slag and then is granulated and sintered, so that the sintering temperature of the chromite can be reduced, the liquid phase amount is increased, the carbon proportion can be decreased, the yield and the strength of the sintered ore are improved, the difficult chromite powder sintering problem is solved, the energy consumption for the production is reduced simultaneously, an expensive solvent is unnecessary, and the obtained sintered product is a nickel-chromium-iron alloy which can be directly applied to the stainless steel production and does not increase a subsequent smelting slag discharge process of the stainless steel production. Compared with the chromite sintering process in the prior art, the method has the advantages that the coke proportion is low, the sintering temperature is low, the quality of the sintered ore is high, the ferronickel smelting furnace slag is effectively recycled and the production cost is low, the waste utilization in the nickel alloy production process is realized, the total cost of the stainless steel production is reduced, the economic benefit of enterprises is increased, and the energy conservation and emission reduction pressure of the enterprises is relieved.

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 based on recovery of ferronickel smelting slag. 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'...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C22B1/248
CPCY02P10/20
Inventor 吕学伟郭恩光陈攀潘成刘梅袁秋刚李东海
Owner CHONGQING UNIV
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