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Method for preparing sintered ores by adding common iron ores into low-chromium vanadium titano-magnetite

A technology for vanadium titanomagnetite and magnetite, which is applied in the field of low-chromium vanadium titanomagnetite and ordinary iron ore to prepare sintered ore, can solve the problem of uneven particle size of sintered material, poor air permeability of sintered material layer, and granulation. Long time and other problems, to achieve the effect of narrow reflow range, reduction of gas cost, and improvement of sintering efficiency

Inactive Publication Date: 2018-04-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When using the existing technology to prepare Panxi Hongge low-chromium vanadium-titanium sintered ore, the granulation time is long, the particle size of the sintered material is uneven, the gas permeability of the sintered material layer is poor, the yield is low, and the drum strength is lower than the general level
Therefore, it is more difficult to produce sintered ore from low-chromium vanadium-titanium magnetite

Method used

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  • Method for preparing sintered ores by adding common iron ores into low-chromium vanadium titano-magnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for preparing sintered ore by adding low-chromium vanadium-titanium magnetite to common iron ore, such as figure 1 As shown, the method includes:

[0050] 1. Mixing

[0051] The sintering materials are 35kg of low-chromium vanadium-titanium magnetite from Honggebei Mine, 27.7kg of domestic ordinary magnetite, 1kg of blast furnace dust, 1kg of magnetic separation powder, 20kg of returned ore, 10.3kg of lime powder, and 2.5kg of coke. , Coal powder accounted for 2.5kg of the total weight. Weigh the raw materials according to the above ingredients, put them into the mixer for ore mixing, during the mixing process, spray mist water to account for 4% of the total weight of the raw materials, mix for 15 minutes, stew for 15 minutes, and continue mixing for 10 minutes.

[0052] 2. Granulation

[0053] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation process, spray mist water to account for 2% of the total weight...

Embodiment 2

[0069] A method for preparing sintered ore by adding common iron ore to low-chromium vanadium-titanium magnetite, the specific operation steps are as follows:

[0070] 1. Mixing

[0071] The raw materials for sintering are 37kg of low-chromium vanadium-titanium magnetite, 30kg of domestic hematite, 1kg of blast furnace dust, 1kg of magnetic separation powder, 15kg of returned ore, 11kg of limestone, 2.5kg of coke, and 2.5kg of pulverized coal. Weigh the raw materials according to the above ingredients, put them into the mixing machine for ore mixing, spray mist water to account for 4.5% of the total raw material weight during the mixing process, mix for 18 minutes, stew for 16 minutes, and continue mixing for 12 minutes.

[0072] 2. Granulation

[0073] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation process, spray mist water accounting for 1.8% of the total weight of raw materials, and granulate for 10 minutes to obtain ...

Embodiment 3

[0089] This embodiment is on the basis of embodiment 1, concrete operation is as follows:

[0090] 1. Mixing

[0091] The sintering materials are 35.9kg of low-chromium vanadium-titanium magnetite according to the red grid, 30kg of ordinary magnetite imported from abroad, 1kg of blast furnace dust, 1kg of magnetic separation powder, 20kg of returned ore, 12.2kg of slaked lime, 2.5kg of coke, coal The powder accounts for 2.5kg of the total weight. Weigh the raw materials according to the above ingredients, put them into the mixing machine for ore mixing, during the mixing process, spray mist water to account for 5.2% of the total raw material weight, the mixing time is 20 minutes, stew for 18 minutes, and continue mixing for 14 minutes.

[0092] 2. Granulation

[0093] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation process, spray mist water accounting for 1.1% of the total weight of raw materials, and granulate for 8 min...

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Abstract

The invention discloses a method for preparing sintered ores by adding common iron ores into low-chromium vanadium titano-magnetite. The method is characterized in that the low-chromium vanadium titano-magnetite, the common iron ores and other sintered materials are subjected to the following steps of material mixing, material stewing, material mixing, material pelleting, material distribution, ignition, sintering, crushing and sieving to obtain the sintered ores. According to the method, the obtained low-chromium vanadium-titanium sintered ores has the advantages that the sintering rate is high, the soft melting temperature is high, the soft melting interval is narrow, the obtained sintered ores have good air permeability in a soft melting and dropping zone, and the performance of moltendrops is good.

Description

technical field [0001] The invention belongs to the production technology of ironmaking raw materials, and in particular relates to a method for preparing sintered ore by mixing low-chromium vanadium-titanium magnetite with ordinary iron ore. Background technique [0002] The Honggebei Mine in Panzhihua, Sichuan, as a reserve resource for inland iron and steel, is a low-chromium, high-titanium vanadium-titanium magnetite. But at present, although low-chromium vanadium-titanium magnetite resources have been mined and utilized, due to the immature smelting technology, the utilization rate of titanium, vanadium, chromium and other resources is low, and the waste of resources is serious, especially chromium resources in waste residues. The grade is extremely low, the extraction method is complicated and difficult, and the efficiency is low, which not only directly leads to the ineffective utilization of its comprehensive utilization value, but also causes serious soil and water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/16
CPCC22B1/24C22B1/16
Inventor 薛向欣汤卫东杨松陶杨合张立恒高子先马科
Owner NORTHEASTERN UNIV
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