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Method for producing sintered ore by using quick lime

A technology of quicklime and sintered ore, which is applied in the field of sintered ore production, can solve the problems that quicklime and quicklime digester cannot be used, and achieve the effect of improving digestion effect and air permeability

Active Publication Date: 2013-10-09
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting problem is that after the quicklime digester is configured, good-quality quicklime cannot be used, or when good-quality quicklime is used, the quicklime digester cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this embodiment, part of the dolomite and coke powder are finely ground, then added to quicklime in a certain proportion, digested by a digester, and then mixed with other sintered materials.

[0050] The specific steps of preparing sintered ore in this embodiment are as follows:

[0051] (1) Ingredients:

[0052] The iron ore concentrate powder and other returning ore powder, flux and fuel are proportioned according to the following weight percentages:

[0053] 68 parts of iron ore powder, 13 parts of blast furnace return ore powder,

[0054] 8 parts of quicklime, 6 parts of dolomite powder, 5 parts of coke powder,

[0055] Wherein the content and activity of quicklime are the same as those of the reference example.

[0056] (2) Mixing

[0057] ① Partial dolomite and coke powder fine grinding:

[0058] 1 part of dolomite and 1 part of coke powder are finely ground into powder, and the proportion of particles smaller than 0.074mm is 36%; the finely ground dolomi...

Embodiment 2

[0070] In this embodiment, part of the dolomite and coke powder are finely ground, and then added to quicklime in a certain proportion, then digested by a digester, and then mixed with its sintered material. Among them, the ratio of finely ground dolomite to coke powder is increased.

[0071] The specific steps of preparing sintered ore in this embodiment are as follows:

[0072] (1) Ingredients:

[0073] The iron ore concentrate powder and other returning ore powder, flux and fuel are proportioned according to the following weight percentages:

[0074] 68 parts of iron ore powder; 13 parts of blast furnace return ore powder;

[0075] 8 parts of quicklime, 6 parts of dolomite powder, 5 parts of coke powder;

[0076] Wherein the content and activity of quicklime are the same as those of the reference example.

[0077] (2) Mixing

[0078] ① Partial dolomite and coke powder fine grinding:

[0079] Finely grind 2 parts of dolomite and 2 parts of coke powder into powder, and ...

Embodiment 3

[0091] In this embodiment, part of the dolomite and coke powder are finely ground, and then added to quicklime in a certain proportion, then digested by a digester, and then mixed with its sintered material. Among them, the ratio of finely ground dolomite to coke powder is further increased, and the finely ground particles smaller than 0.074mm are further increased.

[0092] The specific steps of preparing sintered ore in this embodiment are as follows:

[0093] (1) Ingredients:

[0094] The iron ore concentrate powder and other returning ore powder, flux and fuel are proportioned according to the following weight percentages:

[0095] 68 parts of iron ore powder; 13 parts of blast furnace return ore powder;

[0096] 8 parts of quicklime, 6 parts of dolomite powder, and 5 parts of coke powder.

[0097] Wherein the content and activity of quicklime are the same as those of the reference example.

[0098] (2) Mixing

[0099] ① Partial dolomite and coke powder fine grinding...

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Abstract

The invention relates to a method for producing a sintered ore by using quick lime. A quick lime digester can also be used when high-quality quick lime is used, so that the function of the high-quality quick lime is exerted to the maximum extent to improve the granulating effect of a sintered mixed material. The method comprises the following steps of: proportioning, mixing, granulating, distributing and sintered ore production. The method is characterized in that the finely ground dolomite and coke powder are matched and added into the quick lime in the mixing process and then digested by the digester, so that the aim of efficiently utilizing the high-quality quick lime is achieved.

Description

technical field [0001] The invention relates to a method for producing sintered ore by utilizing quicklime. Background technique [0002] Quicklime is an important flux in sintering production. In the process of sintering production, quicklime, on the one hand, acts as an alkaline flux to adjust the alkalinity of sintered ore. More importantly, quicklime is digested by water in the process of sintering ore production, and generates Ca(OH) 2 Melt colloid can be used as a binder for sintering mixture, which can improve the granulation effect of sintering mixture, improve the air permeability of the mixture, and finally improve the quality of sintered minerals. Therefore, for many years, the sinter production process has attached great importance to the quality of quicklime, and selected high-quality quicklime as much as possible, and tested its activity to select high-quality quicklime. However, during the sinter production process, it was found that part of the quicklime wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/243C04B2/06
Inventor 张华范建军蔡湄夏贺淑珍李昊堃
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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