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F-containing sintered ore and production method thereof

A production method and technology for sintered ore, which are applied in the field of F-containing sintered ore and its production, can solve the problems of low drum strength and affect the forward running of a blast furnace, and achieve the effects of ensuring long-term forward running and improving microstructure

Inactive Publication Date: 2020-05-08
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drum strength of the currently used blast furnace F-containing sinter is generally not high, which seriously affects the smooth running of the blast furnace

Method used

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  • F-containing sintered ore and production method thereof
  • F-containing sintered ore and production method thereof
  • F-containing sintered ore and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1) According to the raw material and fuel shown in Table 1 below and the proportion shown in Table 2 below, the iron ore powder B has a particle size of 95% through a 200-mesh screen to obtain the raw material;

[0025] 2) The raw materials are mixed with water in a primary mixer, and the moisture content is controlled to 7.0%; then granulated in a secondary mixer with a granulating time of 5 minutes to obtain pellets. The average particle size of the pellets is 10mm;

[0026] 3) After granulation, the pellets are evenly distributed to the sintering device through the distributor. The thickness of the material layer is 700mm. The ignition is carried out by the sintering igniter. The ignition fuel is natural gas. The ignition time is 2.0min. At the same time, the bottom of the sintering device starts to draw air. A certain negative pressure is formed under the grate, the ignition negative pressure is 6000Pa, after ignition, the air is drawn from the top to the bottom through ...

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Abstract

The invention discloses F-containing sintered ore and a production method thereof. The production method provided by the invention comprises the following steps of 1) proportioning the following components including, by mass, 5%-15% of iron ore concentrate A, 65%-75% of iron ore powder B, 3.5%-8.5% of limestone, 0-4% of light calcined dolomite, 1.5%-2.5% of serpentine, 3.0%-4.5% of quick lime and4.5%-6.0% of coke powder, and obtaining a raw material; 2) adding water into the raw material, performing mixing to obtain a mixture, and performing granulating to obtain granules; and 3) performing distributing, igniting and sintering on the granules to obtain the F-containing sintered ore. The prepared F-containing sintered ore has the drum strength of more than or equal to 65.5%, can be effectively used for blast furnace production, and ensures long-term smooth operation of the blast furnace production.

Description

Technical field [0001] The invention belongs to the technical field of metallurgical sinter production, and specifically relates to an F-containing sinter and a production method thereof, in particular to an F-containing sinter with higher drum strength and a production method thereof. Background technique [0002] Sinter is the most important iron-containing charge for blast furnaces. At present, the charge structure commonly used in domestic blast furnaces is high basicity sinter with pellets. The proportion of sinter is about 75%. The drum strength is a measure of the impact resistance and The index of wear resistance directly affects the smelting level of the blast furnace. The sintered ore drum index is low, and it is easy to break during transportation, cloth and blast furnace smelting, resulting in powder, worsening the air permeability of the blast furnace, and ultimately affecting the blast furnace's antegrade. Therefore, the drum strength of sinter is of great significa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/16
CPCC22B1/16C22B1/24
Inventor 刘周利白晓光李玉柱张国成杨帆吕志义李顺喜
Owner BAOTOU IRON & STEEL GRP
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