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Method for preparing high-basicity sinter by using acidic low-chromium type vanadium titano-magnetite

A technology for vanadium titanomagnetite and sintered ore, which is applied in the field of ironmaking raw material production, can solve the problems of poor granulation performance, uneven particle size of sintered material, low yield of finished products, etc., and achieves good air permeability, narrow reflow interval, The effect of high reflow temperature

Inactive Publication Date: 2018-04-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When using the existing technology to prepare Panxi Hongge low-chromium vanadium-titanium sintered ore, the granulation performance is poor, the particle size of the sintered material is uneven, the gas permeability of the sintered material layer is poor, the sintering process is easy to segregate, the yield is low, and the strength of the drum is low. below average
Therefore, it is difficult to produce sintered ore by using low-chromium vanadium-titanium magnetite

Method used

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  • Method for preparing high-basicity sinter by using acidic low-chromium type vanadium titano-magnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing high-basicity sintered ore from acidic low-chromium type vanadium-titanium magnetite, such as figure 1 As shown, the method includes:

[0049] 1. Mixing

[0050] The materials used for sintering are 34.9kg of acidic low-chromium vanadium-titanium magnetite, 30kg of ordinary magnetite, 1kg of blast furnace dust, 1kg of magnetic separation powder, 21kg of returned ore, 12.2kg of lime powder, 2.5kg of coke, and 2.5kg of coal powder. 2.5kg. Weigh the raw materials according to the above ingredients, put them into the mixing machine for ore mixing, and use a sprayer to spray mist water into the mixing materials during the mixing process. The amount of water accounts for 6% of the total weight of the raw materials, and the mixing time is 10 minutes. Afterwards, stew the material, cover the mixer and simmer the material for 10 minutes, and continue to mix the material for 5 minutes after the stewing is completed.

[0051] 2. Granulation

[0052] Pour...

Embodiment 2

[0068] A method for preparing high-basicity sintered ore from acidic low-chromium type vanadium-titanium magnetite, the present embodiment is based on embodiment 1, and the specific operation steps are as follows:

[0069] 1. Mixing

[0070] The materials for sintering are 30.1kg of acidic low-chromium vanadium-titanium magnetite, 34kg of ordinary magnetite, 1kg of blast furnace dust, 0.8kg of magnetic separation powder, 24kg of returned ore, 14kg of lime powder, 2.5kg of coke, and 2.5kg of 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 6.2% of the total weight, the mixing time is 12 minutes, stew for 10 minutes, and continue mixing for 5 minutes.

[0071] 2. Granulation

[0072] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation process, spray mist water accounting for 1.6% of the total weight...

Embodiment 3

[0088] This embodiment is on the basis of embodiment 1, concrete operation is as follows:

[0089] 1. Mixing

[0090] The materials for sintering are 30.4kg of acidic low-chromium vanadium-titanium magnetite, 35kg of ordinary magnetite, 0.8kg of blast furnace dust, 0.7kg of magnetic separation powder, 23kg of returned ore, 14.6kg of lime powder, and coke in the total weight. 2.5kg, coal powder accounts 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 6.5% of the total weight of the raw materials, the mixing time is 15 minutes, stew for 10 minutes, and continue mixing for 5 minutes.

[0091] 2. Granulation

[0092] Pour the mixed raw materials into the cylinder granulator to start granulation. During the granulation process, spray mist water to account for 1.2%, and granulate for 6 minutes to obtain sintering pellets of Hongge low-chromi...

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Abstract

The invention relates to a method for preparing high-basicity sinter by using acidic low-chromium type vanadium titano-magnetite. The method comprises the steps of mixing and stewing raw materials such as the low-chromium type vanadium titano-magnetite, carrying out material mixing again, carrying out granulation, carrying out discharging, carrying out material distribution, carrying out ignition,carrying out sintering, carrying out crushing and carrying out sieving so as to obtain the high-basicity sinter. According to the method, the prepared high-basicity sinter has the advantages that thesintering rate is high, the reducibility is high, the air permeability is good in the softening dropping zone, and the softening dropping performance is good.

Description

technical field [0001] The invention belongs to the ironmaking raw material production technology, in particular to a method for preparing high-basicity sintered ore from acidic low-chromium vanadium-titanium magnetite. Background technique [0002] The Honggebei Mine in Panzhihua, Sichuan is a reserve resource for inland iron and steel. It is a low-chromium, high-titanium vanadium-titanium magnetite. Among them, the abundant chromium resources are of practical significance to reduce the high cost of chromium imported by China every year. [0003] On the one hand, Hongge vanadium-titanium magnetite can meet the demand for iron ore raw materials for blast furnace production. On the other hand, due to the high content of titanium, chromium and vanadium in Hongge vanadium-titanium magnetite, it can develop high value-added Titanium, vanadium and chromium products promote the development of enterprises and technological innovation. Although low-chromium vanadium-titanium magne...

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高子先程功金张立恒
Owner NORTHEASTERN UNIV
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