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

A technology of vanadium-titanium magnetite and chromite, which is applied in the field of ironmaking raw materials, can solve the problems of sintered material particle size is easy to bond into large balls, sintered material layer has poor air permeability, and sintering process is easy to segregate, etc., to improve air permeability The effect of high temperature resistance and firing rate, good metallurgical properties, and high reflow temperature

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

[0005] Using the existing technology, when using low-chromium vanadium-titanium magnetite and adding chromite as raw materials to prepare sintered ore, the granulation performance is poor, the sintered material particle size is easy to bond into large balls, the gas permeability of...

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0050] 1. Mixing

[0051] The first stage: The sintering materials are 59.4kg of low-chromium vanadium-titanium magnetite from Honggebei Mine, 1kg of magnetic separation powder, 20kg of returned ore, 10.3kg of lime powder, 2.5kg of coke, and 2.5kg of coal powder. Weigh the raw materials according to the above batching, put them into the mixer for ore mixing, utilize a sprayer to spray mist water in the mixture during the mixing process, and the amount of sprayed water accounts for 5.5% of the total weight of the above raw materials. Time 8min;

[0052] The second stage: Cover the mixer and stew for 10 minutes. After the stew is over, continue to mix for 10 minutes.

[0053] 2. Granulation

[0054] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation ...

Embodiment 2

[0070] A method for preparing sintered ore by adding chromite to low-chromium vanadium-titanium magnetite, the present embodiment is based on embodiment 1, and the specific operation steps are as follows:

[0071] 1. Mixing

[0072] The materials used for sintering are 59.2kg of low-chromium vanadium-titanium magnetite in Honggebei Mine, 10.6kg of chromite, 1kg of blast furnace dust, 1kg of magnetic separation powder, 20kg of returned ore, 10.3kg of lime powder, 2.5kg of coke, coal Powder 2.5kg. 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 5.5% of the total weight of the raw materials, the mixing time is 12 minutes, and the mixer is covered and stewed for 10 minutes. Continue mixing for 12 minutes.

[0073] 2. Granulation

[0074] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to acc...

Embodiment 3

[0090] This embodiment is on the basis of embodiment 1, concrete operation is as follows:

[0091] 1. Mixing

[0092] The sintering materials are 58.5kg of low-chromium vanadium-titanium magnetite in Honggebei Mine, 11.3kg of chromite, 1kg of blast furnace dust, 1kg of magnetic separation powder, 20kg of returned ore, 10.3kg of lime powder, 2.5kg of coke, coal Powder 2.5kg. Weigh the raw materials according to the above ingredients, put them into the mixer and mix them. During the mixing process, spray mist water to account for 5.4% of the total weight of the raw materials. The mixing time is 15 minutes, and the mixer is covered and stewed for 10 minutes. Continue mixing for 13 minutes.

[0093] 2. Granulation

[0094] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to account for 0.7% of the total weight of raw materials, and granulate for 15 minutes.

[0095] 3. Discharge

[0096] After the g...

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Abstract

The invention relates to a method for preparing sintered ores by adding chromite into low-chromium vanadium titano-magnetite. The method is characterized in that the low-chromium vanadium titano-magnetite, the chromite 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 low-chromium vanadium-titanium sintered ores. According to the method, the problem that material mixing is not uniform is effectively avoided, air permeability and the sintering rate of the sintered materials in the sintering process are effectively improved, the problem that the sintering rate is reduced due to the fact that ball materials with relatively large particle sizes are not completely burnt is also avoided, production cost is effectively reduced, energy is saved, the sintering speed is further improved, and the yield is high; the sintered oresprepared by the method has good air permeability in a soft melting and dripping zone, the performance of the molten drops is good, the yield is high, the metallurgical performance is good, and compared with the prior art, the recovery rate of Fe and Cr is greatly improved; and the method has the advantages that a theoretical basis and a technical foundation are provided for reasonably utilizing the method for preparing the sintered ores by adding the chromite into the Hong Ge low-chromium vanadium titano-magnetite.

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 adding chromite to low-chromium vanadium-titanium magnetite. Background technique [0002] As a reserve resource of inland iron and steel, the North Mine of Honggebei Mine in Panzhihua, Sichuan Province is a low-chromium, high-titanium vanadium-titanium magnetite. Although low-chromium vanadium-titanium magnetite resources in some areas of my country have begun to be 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 the chromium resources in the waste residue. The grade of Cr is extremely low, the extraction method is complex and difficult, the efficiency is low, and the advantages of Cr are not brought into play. This not only directly leads to the failure of its com...

Claims

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Application Information

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IPC IPC(8): C22B1/16C22B1/24C22B1/00
CPCC22B1/16C22B1/00C22B1/2406
Inventor 薛向欣汤卫东杨松陶杨合张立恒程功金高子先
Owner NORTHEASTERN UNIV
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