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Method for preparing sintered ore by using coke drying quenching (CDQ) powder and sintered ore manufactured by method

A technology of sintering and returning ore, which is applied in the field of metallurgy, can solve the problems of high carbon content in the dust removal dust of the dust collector, which affects the safe operation of the dust collector, and reduces the dust removal efficiency, so as to broaden the rational use path, benefit the environment protection, and transfer The effect of increased drum strength

Active Publication Date: 2020-08-07
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the dry coke quenching process, when CDQ powder is mixed into the sintering mixture according to the conventional method, due to the fine particle size of this CDQ powder, it is easy to be sucked into the exhaust system during the sintering process, which not only increases the fuel consumption , can also lead to high carbon content in the electrostatic precipitator dust at the head of the dust collector, lower dust removal efficiency, and affect the safe operation of the dust collector

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Wetting pretreatment of CDQ powder.

[0060] Wet the CDQ powder with water, wherein the ratio of adding water is: 96 parts of CDQ powder, 4 parts of water, and let stand for 9 hours after adding water.

[0061] (2) Prepare pre-mixed ingredients to make C-melted pre-mixed powder.

[0062] In this embodiment, limestone with particle size ≤ 3 mm can be used as flux. Therefore, 6 parts of wetted CDQ powder can be pre-mixed with 4 parts of limestone to make C melting pre-mixed powder.

[0063] (3) Prepare the mixed material.

[0064] Batching in the mixing yard, the batching ratio can be:

[0065] Magnet concentrate powder: 26 parts

[0066] Fine hematite powder: 60 parts

[0067] C melting premixed powder: 8 parts

[0068] Recycling materials: 6 copies

[0069] After the above ingredients are blended, they can be piled up in the mixing yard for more than 5 hours to make a mixing material.

[0070] (4) Preparation of sintering ingredients.

[0071] Mixed materia...

Embodiment 2

[0078] (1) Wetting pretreatment of CDQ powder.

[0079] Wet the CDQ powder with water, wherein the water ratio is: 96.5 parts of CDQ powder, 3.5 parts of water, and let stand for 8 hours after adding water.

[0080] (2) Prepare pre-mixed ingredients to make C-melted pre-mixed powder.

[0081] In this embodiment, dolomite with a particle size of ≤3 mm can be used as the flux. Therefore, 5.5 parts of CDQ powder after wetting can be pre-mixed with 4.5 parts of dolomite powder to make C melting pre-blended powder.

[0082] (3) Prepare the mixed material.

[0083] Batching in the mixing yard, the batching ratio can be:

[0084] Magnet concentrate powder: 30 parts

[0085] Fine hematite powder: 55 parts

[0086] C melting powder: 7 parts

[0087] Recycled materials: 8 copies

[0088] After the above ingredients are blended, they can be piled up in the mixing yard for more than 5 hours to make a mixing material.

[0089] (4) Preparation of sintering ingredients.

[0090] Mix...

Embodiment 3

[0097] (1) Wetting pretreatment of CDQ powder.

[0098] Wet the CDQ powder with water, wherein the ratio of adding water can be: 97 parts of CDQ powder, 3 parts of water, and let stand for 8 hours after adding water.

[0099] (2) Prepare pre-mixed ingredients to make C-melted pre-mixed powder.

[0100] In this embodiment, limestone with particle size ≤ 3 mm can be used as flux. Therefore, 5 parts of CDQ powder after wetting can be pre-mixed with 5 parts of limestone to make C melting pre-mixed powder.

[0101] (3) Prepare the mixed material.

[0102] Batching in the mixing yard, the batching ratio can be:

[0103] Magnet concentrate powder: 30 parts

[0104] Fine hematite powder: 50 parts

[0105] C melting premixed powder: 10 parts

[0106] Recycling materials: 10 parts

[0107] After the above ingredients are blended, they can be piled up in the mixing yard for more than 5 hours to make a mixing material.

[0108] (4) Preparation of sintering ingredients.

[0109] M...

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Abstract

The invention discloses a method for preparing sintered ore by using coke drying quenching (CDQ) powder. The method comprises the steps that firstly, wetting pre-treatment is carried out on the CDQ powder; next, a premix is prepared, wherein the wetted CDQ powder is pre-mixed with a flux with particle size less than or equal to 3mm to prepare the premix, that is C-melting pre-mixed powder; next, ablending material is prepared, and the C-melting pre-mixed powder is evenly mixed with hematite powder and magnetite concentrate powder to prepare the blending material; next, sintering ingredients are prepared; and finally, the sintered ore is prepared. The high-efficiency utilization of the CDQ powder is achieved, the ratio of coke particles and fuel consumption is significantly reduced, and CO2 and NOx emission is reduced; and the content of calcium ferrite in the fine hematite concentrate powder sintered ore obtained according to the method is improved, the drum strength can be improved,and the reducibility can be improved. The invention further discloses sintered ore manufactured by the method for preparing the sintered ore by using the CDQ powder.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preparing sintered ore by using CDQ powder, and a sintered ore manufactured by the method. Background technique [0002] Generally speaking, CDQ (coke dry quenching) powder is the powder (including dedusting ash) produced during dry coke quenching in coking plants. For sintering of fine hematite concentrate powder, it is very beneficial to increase the strength of the sinter drum and reduce the consumption of solid fuel for sintering. [0003] However, in the dry coke quenching process, when CDQ powder is mixed into the sintering mixture according to the conventional method, due to the fine particle size of this CDQ powder, it is easy to be sucked into the exhaust system during the sintering process, which not only increases the fuel consumption , It can also lead to high carbon content in the electrostatic precipitator dust at the head of the dust collector, low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
CPCC22B1/16Y02P10/20
Inventor 贺淑珍史永林李昊堃蔡湄夏张华刘文文
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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