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Method for producing pre-reducing composite sinter

A production method and technology for sintered ore are applied in the production field of pre-reduced composite sintered ore, which can solve the problems of high energy consumption, single charge structure, large investment in ore troughs, etc., so as to improve comprehensive grade, simplify blast furnace operation, and reduce bentonite. The effect of matching

Inactive Publication Date: 2008-02-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned method has a single charge structure, which requires the sinter charge and the pellet charge to go through an independent sintering process, and must be equipped with multiple blast furnace troughs, which require large investment and high energy consumption.

Method used

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  • Method for producing pre-reducing composite sinter

Examples

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Effect test

Embodiment 1

[0018] A production method of pre-reduced composite sintered ore, the method is to use high-basicity sintered ore and acid pellets to mix, and add coal powder to the raw material for making balls from acid pellets, and then mix them evenly The high-basic sinter and acid pellets are sintered together on the sintering machine to produce pre-reduced blast furnace charge. The method steps are:

[0019] ①Batching iron-containing raw materials, flux and fuel according to a certain proportion, and then mixing and granulating; wherein the weight ratio of each component is: iron-containing raw material 70, flux 27, fuel 3;

[0020] ②Batch iron concentrate, bentonite, and coal powder according to a certain proportion, and carry out mixing and pelletizing; wherein the weight ratio of each component is: iron concentrate 90, bentonite 1.5, coal powder 8.5; the particle size of the ball is 5-16mm.

[0021] ③ The raw materials prepared in step ① and the raw materials prepared in step ② are...

Embodiment 2

[0025] A production method of pre-reduced composite sintered ore, the method steps are:

[0026] ①Batching iron-containing raw materials, flux and fuel according to a certain proportion, mixing and granulating; wherein the weight ratio of each component is: iron-containing raw material 80, flux 14, fuel 6;

[0027] ②Batch iron concentrate, bentonite, and coal powder according to a certain proportion, and perform mixing and pelletizing; wherein the weight ratio of each component is: iron concentrate 80, bentonite 0.5, coal powder 19.5; the particle size of the ball is 5-16mm.

[0028] ③ The raw materials prepared in step ① and the raw materials prepared in step ② are batched according to the weight ratio of 3:2, mixed in a mixer, and then sent to a sintering machine for sintering.

Embodiment 3

[0030] A production method of pre-reduced composite sintered ore, the method steps are:

[0031] ①Batching iron-containing raw materials, flux and fuel according to a certain proportion, mixing and granulating; wherein the weight ratio of each component is: iron-containing raw material 75, flux 19, fuel 6;

[0032] ②Batch iron concentrate, bentonite, and coal powder according to a certain proportion, and carry out mixing and pelletizing; wherein the weight ratio of each component is: iron concentrate 85, bentonite 3, coal powder 12; the particle size of the ball is 5-16mm.

[0033] ③ The raw materials prepared in step ① and the raw materials prepared in step ② are batched according to the weight ratio of 4:1, mixed in a mixer, and then sent to a sintering machine for sintering.

[0034] In the above embodiments: iron-containing raw materials are selected from one or more of concentrate, rich ore powder, miscellaneous materials, and returned ore; the flux is one or more of lim...

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Abstract

The invention relates to a production method of pre-reductional composite sinter. The method mixes two kinds of charging high alkalinity sinter and acid pellet together and adds coal dust to the material for acid pellet. Then the uniform mixture of high alkalinity sinter and acid pellet is sintered in sintering machine to produce charging for pre-reduction blast furnace. The produced charging of the invention has higher grade and concise blast furnace operation.

Description

technical field [0001] The invention relates to a production method of pre-reduced composite sintered ore. Background technique [0002] At present, in the production of sinter ore in the metallurgical industry, the commonly used blast furnace charge is to use a single sinter ore, and then go through the blast furnace smelting process to produce sinter; or use a single pellet ore, and then go through the blast furnace smelting process to produce sinter Sinter. [0003] The above-mentioned method has a single charge structure, and requires the sinter charge and the pellet charge to go through an independent sintering process, and must be equipped with multiple blast furnace troughs, which require large investment and high energy consumption. Contents of the invention [0004] The purpose of the present invention is to provide a production method of pre-reduced composite sintered ore with less investment, simplified blast furnace batching facilities, simple operation, highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/14
Inventor 周节旺王志君
Owner ANGANG STEEL CO LTD
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