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Method of producing sinter by using high-proportion Baiyenebo iron ore concentrate

A technology for iron concentrate and sinter, which is applied in the field of metallurgy, can solve the problems of poor air permeability of material layer, poor granulation of mixed material, influence on sintering process, etc. Effect

Active Publication Date: 2019-04-05
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that in the prior art, the use of Baiyan Obo iron concentrate for sintering production will cause poor granulation of the mixture, resulting in poor air permeability of the material layer and affecting the sintering process. Cause sintered ore, quality decline

Method used

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  • Method of producing sinter by using high-proportion Baiyenebo iron ore concentrate
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  • Method of producing sinter by using high-proportion Baiyenebo iron ore concentrate

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Embodiment 1

[0037] Carry out batching according to raw material and proportioning shown in Table 2. The prepared mixture was mixed uniformly in the primary mixer, and then mixed and granulated again in the secondary mixing granulator. The granulation time was 3 minutes, and the mass percentage of water in the mixture was controlled at 7.5%. The granulated mixture is evenly distributed to 500m through the distribution device 2 On the large-scale sintering machine trolley, the thickness of the material layer is 800mm. The igniter of the sintering machine head is ignited. The ignition fuel is coke oven gas. The ignition time is 1.5min. At the same time, the bottom of the sintering machine starts to draft, forming a certain negative The ignition negative pressure is 4900Pa. After ignition, the air is sucked away through the sintering layer from top to bottom. The sintering flue gas is discharged into the atmosphere after the desulfurization process. The sintering exhaust negative pressure is ...

Embodiment 2

[0039] Carry out batching according to raw material and proportioning shown in Table 2. The prepared mixture was mixed uniformly in the primary mixer, and then mixed and granulated again in the secondary mixing granulator. The granulation time was 5 minutes, and the mass percentage of water in the mixture was controlled at 7.8%. The granulated mixture is evenly distributed to 500m through the distribution device 2 On the large-scale sintering machine trolley, the thickness of the material layer is 800mm. The igniter of the sintering machine head is ignited. The ignition fuel is coke oven gas. The ignition time is 2.0min. At the same time, the bottom of the sintering machine starts to draw air, forming a certain negative The ignition negative pressure is 5900Pa. After ignition, the air is sucked away through the sintering material layer from top to bottom. The sintering flue gas is discharged into the atmosphere after the desulfurization process. The sintering exhaust negative ...

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Abstract

The invention discloses a method of producing sinter by using high-proportion Baiyenebo iron ore concentrate. The preparation method comprises the following steps that burdening raw materials is carried out by using 27-54% of Baiyenebo iron ore concentrate, the raw materials are mixed with water, granulating is carried out to obtain a mixture, and the mixture is sintered to obtain the sintered ore. The method of producing the sinter by using the high-proportion Baiyenebo iron ore concentrate adds the high-proportion Baiyenebo iron ore concentrate, other iron material cooperates, the cooperating burdening proportion is optimized, under the condition that the quality of the sinter is guaranteed to meet the requirements of the smelting of a blast furnace, the proportion of the addition of theBaiyenebo iron ore concentrate is improved to the maximum extent, the utilization rate is greatly improved, and the sintering material cost is reduced; the method is simple, easy to operate, low in obtained sinter ore cost and good in quality, the market prospect is wide, the requirements of social development are facilitated, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for producing sintered ore from iron concentrate. Background technique [0002] In the field of iron and steel metallurgy, Baiyun Obo iron concentrate is magnetite, which is a special ore, containing harmful elements such as potassium, sodium, fluorine, and rare earth elements; the content of silicon dioxide is relatively low, between 1.0% and 1.5%, and The silicon dioxide exists in the form of complex silicate containing potassium and sodium; the iron concentrate has an extremely fine grinding particle size, and the -0.074mm particle size accounts for more than 90%, which is an ultrafine iron concentrate. When using a large sintering machine to produce sinter, under the condition of thick material layer, using such fineness iron concentrate for sintering production will cause poor granulation of the mixture, resulting in poor air permeability of the material layer, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/24C21B5/00
CPCC21B5/008C22B1/16C22B1/24
Inventor 陈革邬虎林季文东刘曙光白晓光梁海全刘周利付国伟李玉柱
Owner BAOTOU IRON & STEEL GRP
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